{"id":118,"date":"2015-11-19T14:21:59","date_gmt":"2015-11-19T06:21:59","guid":{"rendered":"http:\/\/blog.xrhoujie.com\/?p=118"},"modified":"2017-10-11T10:21:10","modified_gmt":"2017-10-11T02:21:10","slug":"%e5%92%8c%e5%b0%91%e5%a6%87%e7%99%bd%e6%b4%81%e4%b8%80%e8%b5%b7%e5%ad%a6javascript","status":"publish","type":"post","link":"http:\/\/blog.xrhoujie.com\/?p=118","title":{"rendered":"\u548c\u5c11\u5987\u767d\u6d01\u4e00\u8d77\u5b66JavaScript"},"content":{"rendered":"
\n
\n

\u6211\u4e0d\u786e\u5b9aJavaScript\u8bed\u8a00\u662f\u5426\u5e94\u8be5\u88ab\u79f0\u4e3aObject-Oriented\uff0c\u56e0\u4e3aObject Oriented\u662f\u4e00\u7ec4\u8bed\u8a00\u7279\u6027\u3001\u7f16\u7a0b\u6a21\u5f0f\u3001\u548c\u8bbe\u8ba1\u4e0e\u5de5\u7a0b\u65b9\u6cd5\u7684\u7b3c\u7edf\u79f0\u8c13\uff0c\u6ca1\u6709\u4e00\u4e2a\u8be6\u5c3d\u548c\u5927\u5bb6\u90fd\u8ba4\u53ef\u7684checklist\u53bb\u6bd4\u8f83\uff0c\u5c31\u5f88\u96be\u5728\u4e3b\u89c2\u610f\u89c1\u4e0a\u4e92\u76f8\u8ba4\u540c\u3002<\/p>\n

\u4f46JavaScript\u767e\u5206\u4e4b\u4e00\u767e\u662f\u4e00\u95e8Object\u8bed\u8a00\u3002<\/p>\n

\u8fd9\u53e5\u8bdd\u6709\u4e24\u4e2a\u76f4\u63a5\u542b\u4e49\uff1a<\/p>\n

    \n
  1. \u9664\u4e86\u539f\u59cb\u7c7b\u578b(primitive type)\u503c\u4e4b\u5916\uff0c\u4e00\u5207\u7686\u5bf9\u8c61\uff0c\u5305\u62ec\u51fd\u6570\uff1b<\/li>\n
  2. \u4e00\u5207\u5bf9\u8c61\u90fd\u662f\u6784\u9020\u51fa\u6765\u7684\uff0c\u6709\u4e00\u4e2a\u51fd\u6570\u4f5c\u4e3a\u5b83\u7684\u6784\u9020\u51fd\u6570\uff08constructor\uff09\uff1b<\/li>\n<\/ol>\n

    JavaScript\u7684\u53e6\u4e00\u4e2a\u6807\u5fd7\u6027\u7279\u6027\u662f\u539f\u578b\u91cd\u7528(prototype-based reuse)\uff0c\u6211\u5728\u8fd9\u91cc\u6545\u610f\u907f\u514d\u4f7f\u7528\u7ee7\u627f(inheritance)\u8fd9\u4e2a\u8bcd\u8bed\uff0c\u662f\u4e0d\u60f3\u8ba9\u8bfb\u8005\u7acb\u523b\u8054\u60f3C++\/Java\u8bed\u8a00\u7684\u7ee7\u627f\uff0c\u8bf7\u5fd8\u8bb0\u5b83\u4eec\uff1b<\/p>\n

    JavaScript\u91cc\u7684\u5bf9\u8c61\u5e76\u975e\u662fClass\u7684\u5b9e\u4f8b\u5316\uff0c\u5b83\u6ca1\u6709\u9759\u6001\u7ed3\u6784\u7684\u6982\u5ff5\uff1b\u5f53\u7136\u8fd9\u4e0d\u610f\u5473\u8fd9\u5bf9\u8c61\u6ca1\u6709\u7ed3\u6784\uff0c\u4f46\u5bf9\u8c61\u7684\u7ed3\u6784\u53ea\u80fd\u7531\u6784\u9020\u51fd\u6570\u5728\u8fd0\u884c\u65f6\u6784\u9020\u51fa\u6765\uff0c\u56e0\u6b64\u6784\u9020\u51fd\u6570\u5728JavaScript\u91cc\u7684\u5730\u4f4d\u662f\u5f88\u9ad8\u7684\uff0c\u5b83\u662f\u552f\u4e00\u8d1f\u8d23\u7ed3\u6784\u7684\u5730\u65b9\u3002<\/p>\n

      \n
    1. \u6bcf\u4e2a\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a\u539f\u578b\uff0c\u5bf9\u8c61\u53ef\u4ee5\u4f7f\u7528\u548c\u91cd\u8f7d\u539f\u578b\u5bf9\u8c61\u4e0a\u7684\u6570\u636e\u6210\u5458\u6216\u65b9\u6cd5\uff0c\u8fd9\u662f\u5bf9\u8c61\u7684\u552f\u4e00\u91cd\u7528\u673a\u5236\uff1b<\/li>\n<\/ol>\n

      \u4ecb\u7ecd\u539f\u578b\u6982\u5ff5\u7684\u6587\u7ae0\u548c\u4e66\u5f88\u591a\uff0c\u5047\u5b9a\u4f60\u7406\u89e3\u539f\u578b\u7684\u57fa\u672c\u6982\u5ff5\uff1b\u8fd9\u91cc\u9700\u8981\u6307\u51fa\u7684\u95ee\u9898\u662f\uff0c\u5bf9\u8c61\u4e4b\u95f4\u7684\u5c5e\u6027\u91cd\u7528\uff0c\u548c\u9762\u5411\u5bf9\u8c61\u91cc\u9762\u8bf4\u7684\u91cd\u7528\u662f\u4e24\u56de\u4e8b\uff1b<\/p>\n

      \u4f60\u53ef\u4ee5\u4ece\u91cd\u7528\u7684\u5982\u6b64\u7b80\u5355\u7684\u5b9a\u4e49\u770b\u51fa\uff0c\u5b83\u552f\u4e00\u7684\u8bbe\u8ba1\u76ee\u7684\u662f\u60f3\u51cf\u5c11\u5bf9\u8c61\u7684\u6570\u91cf\uff0c\u5b83\u63d0\u4f9b\u7684\u673a\u5236\u5c31\u662f\u8ba9\u591a\u4e2a\u5bf9\u8c61\u5171\u4eab\u539f\u578b\u5bf9\u8c61\u4e0a\u7684\u5c5e\u6027\uff0c\u540c\u65f6\u53c8\u53ef\u4ee5\u6709\u91cd\u8f7d\u80fd\u529b\uff1b<\/p>\n

      \u4f46\u4e0d\u8981\u5bf9\u6b64\u6d6e\u60f3\u8fde\u7bc7\uff0c\u5b83\u548cJava\u8bed\u8a00\u91cc\u901a\u8fc7\u7ee7\u627f\u91cd\u7528\u9759\u6001\u7ed3\u6784\u548c\u884c\u4e3a\u662f\u5b8c\u5168\u4e24\u56de\u4e8b\uff0c\u5373\u4f7f\u8bf4\u201cJavaScript\u7684\u539f\u578b\u5316\u91cd\u7528\u4ec5\u4ec5\u662f\u884c\u4e3a\u91cd\u7528\uff0c\u800cJava\u7684\u91cd\u7528\u662f\u7ed3\u6784\u548c\u884c\u4e3a\u7684\u53cc\u91cd\u91cd\u7528\u201d\uff0c\u8fd9\u6837\u7684\u8868\u8ff0\u4e5f\u6ca1\u6709\u610f\u4e49\uff0c\u56e0\u4e3a\u524d\u8005\u5728\u8fd0\u884c\u65f6\u5bf9\u8c61\u4e4b\u95f4\u53d1\u751f\u540e\u8005\u5728\u9759\u6001\u7f16\u8bd1\u65f6\u53d1\u751f\uff0c\u4e00\u4e2a\u5728\u8bf4\u6211\u4eec\u53d1\u660e\u4e86\u6d3b\u5b57\u5370\u5237\u672f\u8ba9\u5370\u5237\u53d8\u5f97\u66f4\u5bb9\u6613\uff0c\u53e6\u4e00\u4e2a\u5728\u8bf4\u6211\u4eec\u53d1\u660e\u4e86\u7535\u8111\u4e0a\u7684\u5b57\u4f53\uff0c\u4f60\u9700\u8981\u663e\u793a\u54ea\u4e2a\u5b57\u5c31\u6765\u5230\u6211\u8fd9\u91cc\u62ff\uff1b\u867d\u7136\u7ed3\u679c\u6709\u65f6\u770b\u8d77\u6765\u5f88\u50cf\uff0c\u4f46\u662f\u673a\u5236\u4e0a\u5b8c\u5168\u98ce\u9a6c\u725b\u4e0d\u76f8\u53ca\uff0c\u4e0d\u8981\u4e0a\u4e86\u962e\u4e00\u5cf0\u8001\u5e08\u7684\u5f53\u3002<\/p>\n

      \u524d\u9762\u5199\u7684\u8fd9\u4e09\u6761\uff0c\u53ef\u4ee5\u4f5c\u4e3a\u6784\u9020JavaScript\u5bf9\u8c61\u7cfb\u7edf\u7684\u4e09\u4e2a\u57fa\u7840\u5047\u8bbe\uff1b<\/p>\n

      \u5728JavaScript\u91cc\u6700\u6700\u5e95\u5c42\u7684\u6982\u5ff5\uff0c\u5e76\u975e\u4f60\u5728\u5982\u4f55\u4f7f\u7528JavaScript\u8bed\u8a00\u7684\u90a3\u4e9b\u6559\u6750\u4e2d\u770b\u5230\u7684\u79cd\u79cd\u7f16\u7a0b\u6982\u5ff5\uff0c\u800c\u662f\u4e24\u4e2a\u8bcd\u8bed\uff1a\u6784\u9020\u548c\u539f\u578b(\u6216\u8005\u8bf4\u7ed3\u6784\u4e0e\u91cd\u7528)\u3002<\/p>\n

      \u6bcf\u4e2a\u5bf9\u8c61\u5fc5\u6709\u6784\u9020\u51fd\u6570\u548c\u539f\u578b\uff0c\u6574\u4e2aJavaScript\u7cfb\u7edf\u91cc\u4f60\u770b\u5230\u7684\u6240\u6709\u4e1c\u897f\uff0c\u90fd\u53ef\u4ee5\u5728\u6982\u5ff5\u6216\u6a21\u578b\u4e0a\u8fd9\u6837\u53bb\u7406\u89e3\uff0c\u867d\u7136\u5b9e\u73b0\u4e0a\u662f\u53e6\u4e00\u56de\u4e8b\u3002<\/p>\n

      JavaScript\u5bf9\u8fd0\u884c\u73af\u5883(runtime)\u7684\u5047\u8bbe\u53ea\u6709\u4e00\u4e2a\uff0c\u5c31\u662f\u5355\u7ebf\u7a0b\u4e8b\u4ef6\u6a21\u578b\uff0c\u5176\u4ed6\u5173\u4e8e\u865a\u62df\u673a\u8be5\u600e\u6837\u5b9e\u73b0\u5e76\u65e0\u5b9a\u4e49\uff0c\u4e5f\u6ca1\u6709bytecode\u7684\u5b9a\u4e49\uff1bECMA262\u91c7\u7528\u4e86\u4e00\u79cd\u7c7b\u4f3c\u4f2a\u7801\u7684\u65b9\u5f0f\u5b9a\u4e49\u4e86\u5bf9\u5bf9\u8c61\u3001\u5c5e\u6027\u3001\u51fd\u6570\u7684\u57fa\u672c\u64cd\u4f5c\u903b\u8f91\uff0c\u6240\u6709\u5b9e\u73b0\uff0c\u89e3\u91ca\u5668\u4e5f\u597d\uff0cJIT\u4e5f\u597d\uff0c\u65e0\u8bba\u5982\u4f55\u6267\u884cJavaScript\u811a\u672c\uff0c\u53ea\u8981\u4fdd\u8bc1\u8bed\u4e49\u4e00\u81f4\u5373\u53ef\uff1b\u5176\u5b9e\u8fd9\u79cd\u4f2a\u7801\u5b9a\u4e49\u65b9\u5f0f\u672c\u8eab\uff0c\u5c31\u6697\u793a\u4e86\u67d0\u79cd\u7279\u6027\uff0c\u4f46\u6211\u4eec\u6682\u4e14\u4e0d\u8868\u3002<\/p>\n

      \u5355\u7ebf\u7a0b\u7684\u4e8b\u4ef6\u6a21\u578b\u4e0d\u662f\u4e07\u80fd\u7684\uff0c\u4f46\u7edd\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u8ba9\u7f16\u7a0b\u53d8\u5f97\u7b80\u5355\uff1b\u7f3a\u4e4fruntime\u5b9a\u4e49\u4f7f\u5f97\u8fd9\u95e8\u8bed\u8a00\u5e76\u4e0d\u5b9e\u7528\uff0c\u5f00\u53d1\u8005\u603b\u662f\u9700\u8981\u5b8c\u6574\u7684\u4e1c\u897f\uff0c\u4f46\u597d\u5728JavaScript\u81ea\u8bde\u751f\u8d77\u5c31\u6709\u4e86\u7b2c\u4e00\u4e2aruntime\uff1a\u7f51\u7edc\u6d4f\u89c8\u5668\uff0c\u8fd9\u8ba9\u5b83\u6709\u4e86\u7acb\u8db3\u4e4b\u5730\uff0c\u4e4b\u540e\u53c8\u51fa\u73b0Node.js\uff0c\u5b83\u53c8\u627e\u5230\u4e00\u4e2a\u53ef\u4ee5\u751f\u5b58\u7684\u5730\u65b9\u3002<\/p>\n

      \u626f\u8fdc\u4e86\uff0c\u6211\u4eec\u8bf4\u56de\u6784\u9020\u548c\u539f\u578b\u7684\u95ee\u9898\u3002<\/p>\n

       <\/p>\n

      \u521b\u4e16\u7eaa<\/h2>\n

      \u5047\u5982\u4eca\u5929\u6211\u4eec\u5192\u5145\u4e0a\u5e1d\uff0c\u5f00\u59cb\u6784\u9020JavaScript\u7684\u5bf9\u8c61\u4e16\u754c\uff0c\u5728\u8fd9\u4e2a\u4e16\u754c\u91cc\u6ca1\u6709\u4ec0\u4e48\u4e0d\u662f\u5bf9\u8c61\uff0c\u4e5f\u9075\u5faa\u524d\u8ff0\u539f\u5219\uff1b<\/p>\n

      \u6211\u4eec\u5f00\u59cb\u72af\u6101\u7684\u7b2c\u4e00\u4e2a\u95ee\u9898\uff0c\u4f3c\u4e4e\u6211\u4eec\u6389\u8fdb\u4e86\u9e21\u751f\u86cb\u86cb\u751f\u9e21\u7684\u903b\u8f91\u602a\u5708\u3002<\/p>\n

      \u5bf9\u5427\uff0c\u7b2c\u4e00\u4e2a\u5bf9\u8c61\u9020\u4e0d\u51fa\u6765\uff0c\u56e0\u4e3a\u5bf9\u8c61\u9700\u8981\u6784\u9020\u51fd\u6570\u6784\u9020\uff0c\u800c\u51fd\u6570\u4e5f\u662f\u5bf9\u8c61\uff0c\u6240\u4ee5\u6211\u4eec\u524d\u9762\u8bf4\u7684\u90a3\u4e2a\u5bf9\u8c61\u5fc5\u7136\u4e0d\u662f\u7b2c\u4e00\u4e2a\u5bf9\u8c61\u3002<\/p>\n

      \u5f53\u7136\u903b\u8f91\u662f\u903b\u8f91\uff0c\u6211\u4eec\u53ef\u4ee5\u5148\u634f\u51e0\u4e2a\u6700\u539f\u59cb\u7684\u5bf9\u8c61\u51fa\u6765\uff0c\u7136\u540e\u628aconstructor<\/code>\u548c__proto__<\/code>\u5f15\u7528\u88c5\u8f7d\u4e0a\u53bb\uff0c\u8ba9\u5b83\u4eec\u6210\u4e3a\u7cfb\u7edf\u6700\u521d\u7684\u4e9a\u5f53\u548c\u590f\u5a03\u3002\u53cd\u6b63\u4e0a\u5e1d\u672c\u6765\u4e5f\u56de\u7b54\u4e0d\u4e86\u4e9a\u5f53\u7684\u5988\u662f\u8c01\u7684\u95ee\u9898\uff0c\u6211\u4eec\u4e5f\u8fd9\u4e48\u505a\u3002<\/p>\n

      \u6700\u521d\u5728ECMA262\u91cc\u5e76\u6ca1\u6709\u7ea6\u5b9aJavaScript\u5b9e\u73b0\u5fc5\u987b\u63d0\u4f9b\u80fd\u8bbf\u95ee\u6bcf\u4e2a\u5bf9\u8c61\u7684\u539f\u578b\u5bf9\u8c61\u7684\u65b9\u6cd5\uff0c\u5b83\u53ea\u662f\u4e00\u4e2a\u6982\u5ff5\uff1b\u4f46\u662fnode\/v8\u548cjs shell\u90fd\u63d0\u4f9b\u4e86__proto__<\/code>\u8fd9\u4e2a\u540d\u5b57\u7684\u5c5e\u6027\uff0c\u53ef\u4ee5\u7ed9\u51fa\u4efb\u4f55\u5bf9\u8c61\u7684\u539f\u578b\uff1b\u53e6\u4e00\u4e2a\u65b9\u6cd5\u662f\u4f7f\u7528Object.getPrototypeOf\u65b9\u6cd5\u3002<\/p><\/blockquote>\n

      \u6ce8\u610f__proto__<\/code>\u548cfunction\u5bf9\u8c61\u7684prototype\u5c5e\u6027\u662f\u4e24\u56de\u4e8b\uff0cprototype\u662ffunction\u5bf9\u8c61\u7684\u7279\u6709\u5c5e\u6027(\u5c31\u50cfArray\u5bf9\u8c61\u6709length\u8fd9\u4e2a\u7279\u6709\u5c5e\u6027)\uff0c__proto__<\/code>\u624d\u662f\u5bf9\u8c61\u7684\u539f\u578b\uff1b\u4e0b\u9762\u7684\u63cf\u8ff0\u548c\u4ee3\u7801\u91cc\u90fd\u4f7f\u7528__proto__<\/code>\u8fd9\u4e2a\u5f88\u522b\u626d\u7684\u540d\u5b57\u6307\u5bf9\u8c61\u7684\u539f\u578b\uff0c\u5b83\u6ca1\u6b67\u4e49\uff0c\u548c\u4ee3\u7801\u4e00\u81f4\uff0c\u518d\u53d1\u660e\u4e00\u4e2a\u540d\u5b57\u53ea\u4f1a\u5236\u9020\u66f4\u591a\u7684\u6df7\u4e71\u3002<\/p>\n

      \u73b0\u5728\u6253\u5f00node shell\u3002<\/p>\n

      > let m = {}<\/span>\r\nundefined\r\n> m.__proto__<\/span>\r\n{}\r\n> m.__proto__ === m<\/span>\r\nfalse<\/code><\/pre>\n
      \u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u7a7a\u5bf9\u8c61\uff0c\u53eb\u505am\uff0c\u5b83\u7684\u539f\u578b\u4e5f\u662f\u4e00\u4e2a\u7a7a\u5bf9\u8c61\uff0c\u867d\u7136\u540c\u4e3a\u7a7a\u5bf9\u8c61\u4f46\u662f\u5b83\u4eec\u5e76\u975e\u4e00\u4e2a\u5bf9\u8c61\uff0c\u6240\u4ee5\u5e76\u4e0d\u76f8\u7b49\uff1b<\/p>\n
      > m.__proto__.__proto__\r\nnull<\/span>\r\n> let<\/span> op = m.__proto__\r\nundefined<\/span><\/code><\/pre>\n
      \u518d\u6cbf\u7740\u539f\u578b\u94fe\u5f80\u4e0a\u722c\uff0c\u770b\u770b\u539f\u578b\u7684\u539f\u578b\u662f\u8c01\uff1f\u6ca1\u4e86\u3002\u8fd9\u5f88\u597d\uff0c\u6211\u4eec\u77e5\u9053m\u7684\u539f\u578b\u6ca1\u6709\u539f\u578b\u4e86\uff0c\u6211\u4eec\u5148\u628am\u7684\u539f\u578b\u53eb\u505aop<\/code>\u3002<\/p>\n
      \u8c01\u6784\u9020\u7684op<\/code>\u5462\uff1f<\/p>\n
      > op.constructor\r\n[Function<\/span>: Object<\/span>]\r\n> op.constructor === Object<\/span>\r\ntrue<\/span><\/code><\/pre>\n
      op<\/code>\u7684\u6784\u9020\u51fd\u6570\u662f\u5168\u5c40\u90a3\u4e2a\u53ebObject<\/code>\u7684\u5bf9\u8c61\uff0c\u5b83\u672c\u8eab\u662f\u4e00\u4e2a\u51fd\u6570\uff1b\u4e0d\u8981\u628aObject<\/code>\u7406\u89e3\u6210namespace\uff0c\u6216\u8005\u628aObject<\/code>\u5bf9\u8c61\u4e0a\u7684\u65b9\u6cd5\u7406\u89e3\u4e3a\u201c\u9759\u6001\u65b9\u6cd5\u201d\uff0cObject<\/code>\u5c31\u662f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5b83\u88ab\u8d4b\u503c\u7ed9\u4e86\u5168\u5c40\u5bf9\u8c61\u7684Object<\/code>\u5c5e\u6027\uff0c\u867d\u7136\u5b83\u6709\u7279\u522b\u7684\u529f\u80fd\uff0c\u4f46\u662f\u8981\u628a\u5b83\u7406\u89e3\u6210\u6211\u4eec\u6b63\u5728\u6784\u9020\u7684\u5bf9\u8c61\u4e16\u754c\u4e2d\u7684\u4e00\u5458\uff0c\u5b83\u53ea\u662f\u5728\u5bf9\u8c61\u4e16\u754c\u5f00\u5929\u8f9f\u5730\u65f6\u88ab\u6784\u9020\u597d\u4e86\u800c\u5df2\uff0c\u800c\u6211\u4eec\u5728\u8ba8\u8bba\u7684\u5c31\u662f\u8fd9\u4e2a\u6784\u9020\u7684\u8fc7\u7a0b\u3002<\/p>\n
      \u6211\u4eec\u5df2\u7ecf\u56de\u7b54\u4e86op<\/code>\u7684\u6784\u9020\u51fd\u6570\u548c\u539f\u578b\u90fd\u662f\u8c01\u7684\u95ee\u9898\uff0c\u73b0\u5728\u7275\u626f\u51fa\u6765\u4e00\u4e2aObject<\/code>\uff0c\u6211\u4eec\u7ee7\u7eed\u68c0\u67e5\uff1b<\/p>\n
      > Object<\/span>.constructor\r\n[Function<\/span>: Function<\/span>]\r\n> Object<\/span>.constructor === Function<\/span>\r\ntrue<\/span>\r\n> Object<\/span>.__proto__\r\n[Function<\/span>]<\/code><\/pre>\n
      Object<\/code>\u7684\u6784\u9020\u51fd\u6570\u662f\u5168\u5c40\u5bf9\u8c61\u4e0a\u5c5e\u6027\u53ebFunction<\/code>\u7684\u5bf9\u8c61\uff1bObject<\/code>\u7684\u539f\u578b\u662f\u4e2a\u533f\u540d\u51fd\u6570\uff0c\u6309\u7167JavaScript\u5173\u4e8e\u6784\u9020\u51fd\u6570\u7684\u7ea6\u5b9a\uff0c\u5b83\u5e94\u8be5\u662f\u6784\u9020\u51fd\u6570\u7684prototype\u5c5e\u6027\uff1a<\/p>\n
      > Object<\/span>.__proto__ === Function<\/span>.prototype\r\ntrue<\/span>\r\n> let<\/span> fp = Function<\/span>.prototype\r\nundefined<\/span><\/code><\/pre>\n
      \u6211\u4eec\u7ed9\u8fd9\u4e2a\u5bf9\u8c61\u8d77\u4e2a\u540d\u5b57\uff0c\u53ebfp\u3002<\/p>\n
      > fp\r\n[Function<\/span>]\r\n> fp.constructor\r\n[Function<\/span>: Function<\/span>]\r\n> fp.constructor === Function<\/span>\r\ntrue<\/span>\r\n> fp.__proto__\r\n{}\r\n> fp.__proto__.__proto__\r\nnull<\/span>\r\n> fp.__proto__ === op\r\ntrue<\/span><\/code><\/pre>\n
      \u8fd9\u4e2afp<\/code>\u4e5f\u4e0d\u662f\u5f88\u9ebb\u70e6\uff0c\u6211\u4eec\u53d1\u73b0\u5b83\u662f\u4e00\u4e2a\u533f\u540d\u51fd\u6570\uff0c\u5b83\u7684\u6784\u9020\u51fd\u6570\u662fFunction<\/code>\uff0c\u800c\u5b83\u7684\u539f\u578b\u662fop<\/code>\u3002<\/p>\n
      \u6700\u540e\u6765\u770bFunction<\/code><\/p>\n
      > Function<\/span>.constructor\r\n[Function<\/span>: Function<\/span>]\r\n> Function<\/span>.__proto__\r\n[Function<\/span>]\r\n> Function<\/span>.__proto__ === fp\r\ntrue<\/span><\/code><\/pre>\n
      Function<\/code>\u81ea\u5df1\u800d\u4e86\u4e00\u4e2a\u8d56\u76ae\uff0c\u81ea\u5df1\u662f\u81ea\u5df1\u7684\u6784\u9020\u51fd\u6570\u6240\u4ee5\u89e3\u51b3\u4e86\u9e21\u548c\u86cb\u7684\u95ee\u9898\u3002Function<\/code>\u7684\u539f\u578b\u548cprototype\u5c5e\u6027\u6307\u5411\u4e86\u540c\u4e00\u4e2a\u5bf9\u8c61fp<\/code>\u3002<\/p>\n
      \u6240\u4ee5\u5230\u6b64\u4e3a\u6b62\u5462\uff0c\u6211\u4eec\u6252\u5f00\u4e86JavaScript\u4e16\u754c\u91cc\u6700\u539f\u59cb\u7684\u51e0\u4e2a\u5bf9\u8c61\uff0c\u4ed6\u4eec\u7684\u539f\u578b\u5173\u7cfb\u662f\uff1a<\/p>\n
      Function\u00a0and<\/span>\u00a0Object\u00a0-> fp -> op ->\u00a0null<\/code><\/pre>\n
      \u81f3\u4e8e\u6784\u9020\u51fd\u6570\u5462\uff0c\u56e0\u4e3aObject<\/code>\u662ffunction\uff0c\u5b83\u7684prototype\u662fop<\/code>\uff0c\u6309\u7167JavaScript\u7684\u7ea6\u5b9a\uff1afunction\u5bf9\u8c61\u7684prototype\u5c5e\u6027\u6307\u5411\u7684\u5bf9\u8c61\u5e94\u8be5\u628aconstructor<\/code>\u5c5e\u6027\u8bbe\u7f6e\u6210\u8be5function\u5bf9\u8c61\uff0c\u5373\uff1a<\/p>\n
      function<\/span>Object.prototype.constructor =\u00a0function<\/span>Object<\/code><\/pre>\n
      \u540c\u6837\u7684\u9053\u7406\uff0cFunction<\/code>\u7684prototype\u662ffp<\/code>\uff0cfp<\/code>\u7684constructor\u4e5f\u8981\u8bbe\u7f6e\u6210Function<\/code>\u3002<\/p>\n
      \u8fd9\u662fJavaScript\u91cc\u6700\u57fa\u7840\u7684\u56db\u4e2a\u5bf9\u8c61\uff1b\u5176\u4ed6\u7684\u4e00\u5207\u5bf9\u8c61\uff0c\u5728\u6a21\u578b\u548c\u6982\u5ff5\u4e2d\u90fd\u53ef\u4ee5\u6784\u9020\u51fa\u6765\uff1b<\/p>\n
      \u5982\u679c\u4f60\u5728\u5199\u4e00\u4e2a\u89e3\u91ca\u5668\uff0c\u4f60\u5728\u6700\u521d\u5c31\u8981\u628a\u8fd9\u4e9b\u4e1c\u897f\u521b\u9020\u51fa\u6765\uff0c\u7136\u540e\u521b\u9020\u4e00\u4e2aglobal\u5bf9\u8c61\uff08\u6216\u8005\u53ebcontext\uff09\uff0c\u5728\u8fd9\u4e2a\u5bf9\u8c61\u4e0a\u88c5\u4e0aObject<\/code>\u548cFunction<\/code>\uff0c\u8ba9\u4ed6\u4eec\u6210\u4e3a\u5168\u5c40\u5bf9\u8c61\uff0c\u81f3\u4e8eop<\/code>\u548cfp<\/code>\uff0c\u5c31\u8ba9\u4ed6\u4eec\u85cf\u5728\u91cc\u9762\u597d\u4e86\uff1b\u7f16\u7a0b\u4e2d\u6ca1\u6709\u9700\u8981\u7528\u5230\u4ed6\u4eec\u7684\u5730\u65b9\uff0c\u5982\u679c\u8981\u627e\u5230\u4ed6\u4eec\uff0c\u53ef\u4ee5\u7528Object.prototype<\/code>\u6216\u8005Function.prototype<\/code>\u6765\u627e\u5230\u3002<\/p>\n
      \u6240\u4ee5\u5230\u6b64\u4e3a\u6b62\uff0c\u6211\u4eec\u542f\u52a8\u4e86JavaScript\u7684\u5bf9\u8c61\u4e16\u754c\uff0c\u6709\u4e86Function<\/code>\u6211\u4eec\u5c31\u53ef\u4ee5\u6784\u9020\u51fd\u6570\u5bf9\u8c61\uff0c\u6709\u4e86\u51fd\u6570\u6211\u4eec\u5c31\u53ef\u4ee5\u6784\u9020\u66f4\u591a\u7684\u5bf9\u8c61\uff0c\u5982\u679c\u8bed\u8a00\u4e0a\u5141\u8bb8\uff08\u5373\u4e0d\u9700\u8981\u901a\u8fc7native code\u5b9e\u73b0\u7279\u6b8a\u529f\u80fd\uff09\uff0c\u6211\u4eec\u53ef\u4ee5\u7ee7\u7eed\u521b\u5efaObject.prototype<\/code>\u548cFunction.prototype<\/code>\u4e0a\u7684\u90a3\u4e9b\u51fd\u6570\u5bf9\u8c61\u5e76\u628a\u4ed6\u4eec\u88c5\u8f7d\u4e0a\u53bb\uff0c\u5728\u6982\u5ff5\u6a21\u578b\u4e0a\uff0c\u5185\u7f6e\u5bf9\u8c61\u6ca1\u6709\u4ec0\u4e48\u4e86\u4e0d\u8d77\uff0c\u4ed6\u4eec\u4ecd\u7136\u53ef\u4ee5\u88ab\u7406\u89e3\u6210\u88ab\u6784\u9020\u51fa\u6765\u7684\u5bf9\u8c61\uff1b<\/p>\n
      \u4e8b\u5b9e\u4e0a\u6240\u6709\u7684\u51fd\u6570\u4f5c\u7528\u57df\u548c\u51fd\u6570\u5185\u7684\u53d8\u91cf\u4e5f\u53ef\u4ee5\u88ab\u7406\u89e3\u6210\u5bf9\u8c61\u548c\u5b83\u7684\u5c5e\u6027\uff0c\u5728\u672c\u6587\u7684\u7ed3\u5c3e\u6211\u4eec\u4f1a\u8c08\u8fd9\u4e2a\u95ee\u9898\uff0c\u5f53\u7136\u5b83\u53ea\u662f\u6a21\u578b\u4e0a\u7684\uff1b<\/p>\n
      \u6211\u4eec\u9610\u8ff0\u4e86\u4e00\u5207\u7686\u5bf9\u8c61\u7684\u542b\u4e49\uff1b\u8fd9\u4e2a\u5bf9\u8c61\u6a21\u578b\u591f\u7b80\u5355\u5417\uff1f\u6211\u8ba4\u4e3a\u662f\u7684\uff1b\u5b83\u53ea\u6709\u5bf9\u8c61\uff0c\u51fd\u6570\uff0c\u539f\u578b\u4e09\u4e2a\u6982\u5ff5\u3002<\/p>\n
      \u4e00\u4e9b\u4eba\u8bf4JavaScript\u662fLisp\u7a7f\u4e86\u9a6c\u7532\uff0c\u4ece\u5bf9\u8c61\u6a21\u578b\u4e0a\u662f\u53ef\u4ee5\u6210\u7acb\u7684\uff1b\u56e0\u4e3aLisp\u91cc\u7684\u6570\u636e\u7ed3\u6784\u662fList\uff0c\u5b83\u662f\u4e00\u4e2a\u94fe\u8868\uff0c\u6bcf\u4e2a\u8282\u70b9\u6709\u4e24\u4e2aslot\uff0c\u4e00\u4e2a\u7528\u4e8e\u88c5\u8f7d\u503c\uff0c\u53e6\u4e00\u4e2a\u88c5\u8f7dnext\uff1b\u800cJavaScript\u5bf9\u8c61\u5176\u5b9e\u4e5f\u662f\u94fe\u8868\uff0c\u53ea\u4e0d\u8fc7\u5b83\u7ed9\u6bcf\u4e2a\u8282\u70b9\u589e\u52a0\u4e86\u4e00\u4e2a\u5b57\u7b26\u4e32\u6807\u7b7e\uff0c\u5373\u6240\u8c13\u7684property name\uff1b\u4f46\u5982\u679c\u4f60\u7528for ... in<\/code>\u8bed\u6cd5\u904d\u5386\u5bf9\u8c61\u5185\u90e8\u7684\u65f6\u5019\uff0c\u4f60\u4ecd\u7136\u80fd\u770b\u5230\u5185\u90e8\u7ed3\u6784\u7684\u987a\u5e8f\u662f\u7a33\u5b9a\u7684\uff0c\u4ecd\u7136\u662f\u94fe\u8868\uff1b<\/p>\n
      \u7ed9\u6bcf\u4e2a\u8282\u70b9\u52a0\u4e0alabel\u662fJavaScript\u8bbe\u8ba1\u4e0a\u975e\u5e38\u806a\u660e\u7684\u5730\u65b9\uff0c\u56e0\u4e3a\u5b83\u8ba9\u6587\u79d1\u751f\u4e5f\u53ef\u4ee5\u53c2\u4e0e\u5982\u706b\u5982\u837c\u7684\u7f16\u7a0b\u6d3b\u52a8\u3002<\/p><\/blockquote>\n
      \u4f46\u662f\u8fd9\u4e2a\u5bf9\u8c61\u6a21\u578b\u8bf4\u5b8c\u4e86\u597d\u50cf\u4ec0\u4e48\u4e5f\u6ca1\u6709\u8bf4\uff1f\u600e\u4e48JavaScript\u4e66\u4e0a\u8bb2\u7684\u90a3\u4e48\u591a\u6982\u5ff5\u90fd\u6ca1\u6709\u63d0\u5230\u5462\uff1f<\/p>\n
      \u8fd9\u662f\u95ee\u9898\u7684\u672c\u8d28\uff0c\u4e5f\u662f\u5f88\u591aJava\u8fc7\u6765\u7684\u7a0b\u5e8f\u5458\u5f88\u8d39\u52b2\u7684\u5730\u65b9\uff1bJavaScript\u5229\u7528\u4e0a\u8ff0\u7684\u8fd9\u4e2a\u975e\u5e38\u7b80\u5355\u7684\u5bf9\u8c61\u6a21\u578b\uff0c\u53bb\u6a21\u62df\uff0c\u6216\u8005\u8bf4\u5b9e\u73b0\uff0c\u5176\u4ed6\u6240\u6709\u7684\u7f16\u7a0b\u6982\u5ff5\u3002<\/p>\n
      JavaScript\u6700\u521d\u7684\u8bbe\u8ba1\u76ee\u7684\u53ea\u662f\u7528\u4e8e\u975e\u5e38\u7b80\u5355\u7684\u4e00\u4e9b\u5c0f\u529f\u80fd\uff0c\u9700\u8981\u53ef\u7f16\u7a0b\uff1b\u4e0d\u7ba1Brenden Eich\u662f\u5929\u624d\u3001\u62d9\u52a3\u3001\u8fd8\u662f\u5de7\u5408\u7684\u6a21\u4eff\u4e86Lisp\uff0c\u4ee5\u53caSmalltalk\u548cSelf\uff0c\u4ed6\u628a\u4e24\u4e2a\u975e\u5e38\u7b80\u5355\u4e14\u72ec\u4e00\u65e0\u4e8c\u7684\u4e8b\u60c5\u7ed3\u5408\u5728\u4e86\u4e00\u8d77\uff1a<\/p>\n
      Lisp\u662f\u03bb Calculus\u5728\u7f16\u7a0b\u8bed\u8a00\u4e0a\u7684\u76f4\u63a5\u5b9e\u73b0\uff1b\u539f\u578b\u91cd\u7528\u7684\u610f\u601d\u5219\u662f\uff1a<\/p>\n
      JavaScript\uff1a\u8ba9\u6211\u4eec\u6d88\u706d\u5fc5\u987b\u7528\u9759\u6001\u5b9a\u4e49\u7ea6\u5b9a\u52a8\u6001\u5bf9\u8c61\u7ed3\u6784\u7684\u505a\u6cd5\u5427\uff0c\u7f16\u7a0b\u541b\uff01\u4efb\u4f55\u9759\u6001\u80fd\u5b9a\u4e49\u51fa\u6765\u7684\u7ed3\u6784\uff0c\u6211\u4eec\u5728\u8fd0\u884c\u65f6\u4e5f\u53ef\u4ee5\u901a\u8fc7\u4e0d\u65ad\u7684\u590d\u5236\u83b7\u5f97\u554a\uff0c\u53ea\u662f\u4f1a\u6162\u4e00\u70b9\u70b9\u800c\u5df2\u3002\r\n\u7f16\u7a0b\u541b\uff1a\u5185\u5b58\u4e0d\u591f\u600e\u4e48\u529e\uff1f\r\nJavaScript\uff1a\u6211\u4eec\u6709\u539f\u578b\u554a\uff01\r\n\u7f16\u7a0b\u541b\uff1a\u597d\u5427\uff0c\u4f46\u4f60\u8981\u8bf7\u6211\u5403\u51b0\u6fc0\u51cc\u3002<\/code><\/pre>\n
      \u4e0d\u8c08\u5de5\u7a0b\u5b9e\u73b0\uff0c\u4ec5\u4ec5\u5728\u6982\u5ff5\u548c\u6a21\u578b\u4e0a\u7eb8\u4e0a\u8c08\u5175\u7684\u8bdd\uff0cJavaScript\u8bed\u8a00\u6a21\u578b\u4e4b\u7b80\u5355\uff0c\u662f\u5f88\u591a\u8001\u724c\u8bed\u8a00\u548c\u65b0\u5174\u811a\u672c\u8bed\u8a00\u90fd\u96be\u4ee5\u4f01\u53ca\u7684\uff0c\u5b83\u975e\u5e38\u7eaf\u7cb9\u3002<\/p>\n
       <\/p>\n
      \u51fd\u6570\u5bf9\u8c61\u4e0e\u6784\u9020\u51fd\u6570<\/h2>\n
      \u5728\u8c08\u6784\u9020\u51fd\u6570\u4e4b\u524d\u6211\u4eec\u5148\u770b\u4e00\u6bb5\u4ee3\u7801\uff1a<\/p>\n
      \/\/ \u6784\u9020\u5bf9\u8c61\u7684\u65b9\u5f0f1<\/span>\r\nconst<\/span> factory = (a, b) => {\r\n\r\n  return<\/span> {\r\n    a: a,\r\n    b: b,\r\n    sum: function<\/span>()<\/span> <\/span>{\r\n      return<\/span> this<\/span>.a + this<\/span>.b\r\n    }\r\n  }\r\n}<\/code><\/pre>\n
      return<\/code>\u8bed\u53e5\u540e\u9762\u8fd4\u56de\u7684\u5bf9\u8c61\uff0c\u88ab\u79f0\u4e3aex nihilo\u5bf9\u8c61\uff0c\u62c9\u4e01\u8bed\uff0cout of nothing\u7684\u610f\u601d\uff0c\u5373\u8fd9\u4e2a\u5bf9\u8c61\u6ca1\u6709\u7528\u4e00\u4e2a\u4e13\u95e8\u7684\u6784\u9020\u51fd\u6570\u53bb\u6784\u9020\uff0c\u800c\u662f\u7528\u90a3\u4e2a\u5168\u5c40\u7684Object<\/code>\u53bb\u6784\u9020\u4e86\u3002<\/p>\n
      \u5982\u679c\u4f60\u4ec5\u4ec5\u662f\u60f3\u521b\u5efa\u5177\u6709\u540c\u6837\u7ed3\u6784\u7684\u5bf9\u8c61\u5b9e\u73b0\u529f\u80fd\uff0c\u8fd9\u6837\u7684\u5de5\u5382\u65b9\u6cd5\u8db3\u591f\u4e86\u3002\u4f46\u662f\u8fd9\u6837\u5199\uff0c\u4e00\u65b9\u9762\uff0c\u91cd\u7528\u4e0d\u65b9\u4fbf\uff1b\u53e6\u4e00\u65b9\u9762\uff0c\u5982\u679c\u6211\u53ea\u6784\u9020\u51e0\u5341\u4e2a\u8fd9\u6837\u5bf9\u8c61\uff0c\u53ef\u80fd\u4e0d\u662f\u4ec0\u4e48\u5927\u95ee\u9898\uff0c\u4f46\u662f\u5982\u679c\u8981\u6784\u9020\u4e00\u767e\u4e07\u4e2a\u5462\uff1f\u6784\u9020\u4e00\u767e\u4e07\u4e2a\u4f1a\u5f15\u53d1\u4ec0\u4e48\u95ee\u9898\uff1f<\/p>\n
      \u8ba9\u6211\u4eec\u6765\u91cd\u65b0\u5f3a\u8c03\u5bf9\u8c61\u7684\u53e6\u4e00\u4e2a\u542b\u4e49\uff1a\u5bf9\u8c61\u662f\u6709\u751f\u547d\u5468\u671f\u7684\uff1b\u56e0\u4e3a\u51fd\u6570\u4e5f\u662f\u5bf9\u8c61\uff0c\u6240\u4ee5\u51fd\u6570\u5bf9\u8c61\u4e5f\u4e0d\u4f8b\u5916\uff1b\u8fd9\u4e00\u70b9\u662fJavaScript\u548cJava\u7684\u5de8\u5927\u5dee\u5f02\uff0c\u540e\u8005\u7684\u51fd\u6570\uff0c\u672c\u8d28\u4e0a\u662f\u9759\u6001\u5b58\u5728\u7684\uff0c\u6216\u8005\u8bf4\u548c\u7a0b\u5e8f\u7684\u751f\u547d\u5468\u671f\u4e00\u81f4\u3002\u4f46JavaScript\u91cc\u7684\u51fd\u6570\u5bf9\u8c61\u5e76\u975e\u5982\u6b64\u3002<\/p>\n
      \u524d\u9762\u7684sum\u5c5e\u6027\u5bf9\u5e94\u7684\u533f\u540d\u51fd\u6570\u5bf9\u8c61\uff0c\u5b83\u662f\u4ec0\u4e48\u65f6\u5019\u521b\u5efa\u5462\uff1f\u5728return<\/code>\u8bed\u53e5\u89e6\u53d1Object<\/code>\u6784\u9020\u7684\u65f6\u5019\u3002\u5982\u679c\u8981\u521b\u5efa\u4e00\u767e\u4e07\u4e2a\u5bf9\u8c61\u5462\uff1f\u8fd9\u4e2a\u51fd\u6570\u5bf9\u8c61\u4e5f\u4f1a\u88ab\u521b\u5efa\u4e00\u767e\u4e07\u6b21\uff0c\u4ea7\u751f\u4e00\u767e\u4e07\u4e2a\u51fd\u6570\u5bf9\u8c61\u5b9e\u4f8b\uff01<\/p>\n
      \u6362\u53e5\u8bdd\u8bf4\uff0c\u8fd9\u4e2a\u5de5\u5382\u65b9\u6cd5\u521b\u5efa\u7684\u4e00\u767e\u4e07\u4e2a\u5bf9\u8c61\u4e0d\u4ec5\u72b6\u6001\u5404\u6709\u4e00\u4efd\uff0c\u65b9\u6cd5\u4e5f\u5404\u6709\u4e00\u4efd\uff0c\u524d\u8005\u662f\u6211\u4eec\u7684\u610f\u56fe\uff0c\u4f46\u540e\u8005\u662f\u5de8\u5927\u7684\u8d1f\u62c5\uff0c\u867d\u7136\u8fd0\u884c\u73af\u5883\u4e0d\u4f1a\u771f\u7684\u8822\u5230\u53bb\u628a\u4ee3\u7801\u590d\u5236\u4e00\u767e\u4e07\u4efd\uff0c\u4f46\u51fd\u6570\u5bf9\u8c61\u786e\u5b9e\u5b58\u5728\u90a3\u4e48\u591a\uff0c\u5bf9\u8c61\u518d\u5c0f\u4e5f\u6709\u57fa\u7840\u7684\u5185\u5b58\u6d88\u8017\uff0c\u6570\u91cf\u591a\u65f6\u5185\u5b58\u6d88\u8017\u4e0d\u7ba1\u600e\u6837\u90fd\u4f1a\u53ef\u89c2\u7684\uff0c\u5982\u679c\u5bf9\u8c61\u5177\u6709\u4e0d\u53ea\u4e00\u4e2a\u51fd\u6570\uff0c\u90a3\u6d6a\u8d39\u5c31\u66f4\u53ef\u89c2\u4e86\u3002<\/p>\n
      \u8fd9\u662fJavaScript\u7684\u4e00\u5207\u7686\u5bf9\u8c61\uff0c\u5305\u62ec\u51fd\u6570\u4e5f\u662f\u5bf9\u8c61\u7684\u4ee3\u4ef7\u3002<\/p>\n
      \u9047\u5230\u8fd9\u6837\u7684\u95ee\u9898\u4e00\u822c\u6709\u4e24\u79cd\u529e\u6cd5\uff0c\u4e00\u79cd\u662f\u4fee\u6539\u673a\u5236\uff0c\u5373\u524d\u9762\u8bf4\u7684\u6a21\u578b\uff0c\u5f15\u5165\u65b0\u7684\u6982\u5ff5\uff1b\u53e6\u4e00\u79cd\u662f\u52a0\u5165\u7b56\u7565\uff0c\u5373\u5728\u8bed\u8a00\u5b9e\u73b0\u5c42\u9762\u589e\u52a0\u7ea6\u5b9a\uff0c\u4f46\u662f\u5229\u7528\u73b0\u6709\u673a\u5236\uff0c\u4e0d\u589e\u52a0\u6982\u5ff5\uff1b<\/p>\n
      JavaScript\u7684\u8bbe\u8ba1\u8005\u9009\u62e9\u4e86\u540e\u8005\uff0c\u8fd9\u4e5f\u662fJavaScript\u7684\u770b\u4f3c\u53e4\u602a\u7684\u6784\u9020\u51fd\u6570\u7684\u7531\u6765\u3002<\/p>\n
      \u8bbe\u8ba1\u8005\u8bf4\u53ef\u4ee5\u8fd9\u6837\u6765\u89e3\u51b3\u95ee\u9898\uff1a\u5982\u679c\u4e00\u4e2a\u51fd\u6570\u5bf9\u8c61\u7684\u76ee\u7684\u662f\u6784\u9020\u5176\u4ed6\u5bf9\u8c61\uff08\u5373\u6784\u9020\u51fd\u6570\uff09\uff0c\u5b83\u9700\u8981\u4e00\u4e2a\u5bf9\u8c61\u4f5c\u4e3a\u5b83\u7684\u5408\u4f5c\u8005\uff0c\u88c5\u8f7d\u6240\u6709\u88ab\u6784\u9020\u7684\u5bf9\u8c61\u7684\u516c\u7528\u51fd\u6570\uff0c\u4e24\u8005\u4e4b\u95f4\u7684\u8054\u7cfb\u8fd9\u6837\u5efa\u7acb\uff1a<\/p>\n
        \n
      1. \u6784\u9020\u51fd\u6570\u5bf9\u8c61\u9700\u8981\u5177\u6709\u4e00\u4e2a\u540d\u79f0\u4e3aprototype\u7684\u5c5e\u6027\uff0c\u6307\u5411\u516c\u7528\u51fd\u6570\u5bb9\u5668\u5bf9\u8c61\uff1b<\/li>\n
      2. \u516c\u7528\u51fd\u6570\u5bb9\u5668\u5bf9\u8c61\u9700\u8981\u5177\u6709\u4e00\u4e2a\u540d\u79f0\u4e3aconstructor\u7684\u5c5e\u6027\uff0c\u6307\u5411\u6784\u9020\u51fd\u6570\u5bf9\u8c61\uff1b<\/li>\n<\/ol>\n
        \u8fd9\u4e2a\u516c\u7528\u51fd\u6570\u5bb9\u5668\u5bf9\u8c61\u5728\u521b\u5efafunction\u5bf9\u8c61\u7684\u65f6\u5019\uff0c\u5982\u679c\u4e0d\u662farrow function\uff0c\u5b83\u81ea\u52a8\u5c31\u6709prototype\u5c5e\u6027\uff0c\u6307\u5411\u4e00\u4e2a\u7a7a\u5bf9\u8c61\uff1b\u5982\u679c\u662farrow\u51fd\u6570\uff0c\u6ca1\u6709\u8fd9\u4e2a\u5c5e\u6027\uff0carrow\u51fd\u6570\u4e5f\u4e0d\u53ef\u4ee5\u548cnew\u4e00\u8d77\u4f7f\u7528\uff1b<\/p><\/blockquote>\n
        > function<\/span> x<\/span>()<\/span> <\/span>{}\r\nundefined<\/span>\r\n> x.prototype\r\nx {}\r\n> const<\/span> y = () => {}\r\nundefined<\/span>\r\n> y.prototype\r\nundefined<\/span>\r\n><\/code><\/pre>\n
        \u5f53\u8c03\u7528\u6784\u9020\u51fd\u6570\u65f6\uff0c\u901a\u8fc7\u4f7f\u7528new<\/code>\u5173\u952e\u5b57\u660e\u786e\u8868\u793a\u8981\u6784\u9020\u5bf9\u8c61\uff0c\u8fd9\u65f6\u51fd\u6570\u7684\u5de5\u4f5c\u65b9\u5f0f\u53d8\u4e86\uff1a<\/p>\n
          \n
        1. \u5148\u521b\u5efa\u4e00\u4e2a\u7a7a\u5bf9\u8c61N\uff0c\u628a\u5b83\u7684\u539f\u578b__proto__<\/code>\u8bbe\u7f6e\u6210\u8be5\u6784\u9020\u51fd\u6570\u5bf9\u8c61\u7684prototype\u5c5e\u6027\uff1b<\/li>\n
        2. \u628aN\u7684constructor<\/code>\u5c5e\u6027\u8bbe\u7f6e\u4e3a\u6784\u9020\u51fd\u6570\u5bf9\u8c61\uff1b<\/li>\n
        3. \u628aN bind\u6210\u6784\u9020\u51fd\u6570\u7684this\uff1b<\/li>\n
        4. \u8fd0\u884c\u6784\u9020\u51fd\u6570\uff1b<\/li>\n
        5. \u8fd4\u56de\u65b0\u5bf9\u8c61N\uff0c\u4e0d\u7ba1\u6784\u9020\u51fd\u6570\u8fd4\u56de\u4e86\u4ec0\u4e48\uff1b<\/li>\n<\/ol>\n
          new<\/code>\u88ab\u5b9a\u4e49\u6210\u5173\u952e\u5b57\u662f\u4e3a\u4e86\u517c\u5bb9\u5176\u4ed6\u8bed\u8a00\u4f7f\u7528\u8005\u7684\u4e60\u60ef\uff0c\u5199\u6210\u51fd\u6570\u4e5f\u4e00\u6837\uff1a<\/p>\n
          function<\/span> NEW<\/span>(constructor, ...args<\/span>)<\/span> <\/span>{\r\n  let obj = Object.create(constructor.prototype)\r\n  obj.construtor = constructor\r\n  constructor.bind(obj)(...args)\r\n  return<\/span> obj\r\n}<\/code><\/pre>\n
          \u53e6\u4e00\u4e2a\u5173\u952e\u5b57instanceof<\/code>\uff0c\u5219\u53cd\u8fc7\u6765\u5de5\u4f5c\uff0c\u5982\u679c\u8868\u8fbe\u5f0f\u662fA instanceof B<\/code>\uff0c\u5982\u679c\u4e0d\u8003\u8651\u7ee7\u627f\u95ee\u9898\uff0c\u5c31\u53bb\u5224\u65adA.constructor === B<\/code>\u5373\u53ef\uff1b\u7ee7\u627f\u7684\u95ee\u9898\u540e\u9762\u8ba8\u8bba\u3002<\/p>\n
          \u7406\u89e3\u4e86\u8fd9\u4e2a\u8fc7\u7a0b\u5c31\u4f1a\u660e\u767d\uff0cJavaScript\u91cc\u7684\u6784\u9020\u51fd\u6570\u95ee\u9898\uff0c\u5176\u5b9e\u5e76\u975e\u5728\u53d1\u660e\u6784\u9020\u51fd\u6570\u7684\u65b0\u8bed\u6cd5\uff0c\u800c\u662f\u4fdd\u6301\u8bed\u8a00\u6a21\u578b\u4e0d\u53d8\uff0c\u8ba9\u4ed6\u80fd\u591f\u6784\u9020\u5171\u4eab\u539f\u578b\u7684\u5bf9\u8c61\u7684\u4e00\u79cd\u65b9\u5f0f\u3002<\/p>\n
          \u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u5728ES5\u8bed\u6cd5\u91cc\u770b\u5230\u7684\u6784\u9020\u51fd\u6570\u548c\u5b83\u7684\u539f\u578b\u7684\u4ee3\u7801\u662f\u7c7b\u4f3c\u8fd9\u6837\u7684\uff1a<\/p>\n
          function<\/span> X<\/span>(name<\/span>) <\/span>{  this<\/span>.name = name }\r\n\r\nX.prototype.hello = function<\/span>() <\/span>{ console<\/span>.log('hello '<\/span> + this<\/span>.name) }\r\n\r\nvar<\/span> x1 = new<\/span> X('alice'<\/span>)\r\nx1.hello()\r\n\r\nvar<\/span> x2 = new<\/span> X('bob'<\/span>)\r\nx2.hello()\r\n<\/code><\/pre>\n
          \u4f46\u5373\u4f7f\u9700\u8981\u8fd9\u6837\u505a\uff0c\u4e0a\u9762\u7684\u5199\u6cd5\u4e5f\u4e0d\u662f\u552f\u4e00\u7684\u5199\u6cd5\uff0c\u4e5f\u53ef\u4ee5\u8fd9\u6837\u76f4\u63a5\u5199\u5de5\u5382\u65b9\u6cd5\uff1a<\/p>\n
          let<\/span> methods = {\r\n  hello: function<\/span>() <\/span>{\r\n    console<\/span>.log('hello'<\/span> + this<\/span>.name)\r\n  }\r\n}\r\n\r\nfunction<\/span> createX<\/span>(name<\/span>) <\/span>{\r\n  let<\/span> obj = Object<\/span>.create(Object<\/span>.assign({}, methods)) \/\/ \u4f7f\u7528Object.assign\u53ef\u4ee5merge\u591a\u4e2amethods<\/span>\r\n  obj.name = name\r\n  return<\/span> obj\r\n}\r\n<\/code><\/pre>\n
          \u540c\u6837\u5b9e\u73b0\u6784\u9020\u5171\u4eab\u539f\u578b\u7684\u5bf9\u8c61\uff0c\u53ea\u662f\u8fd4\u56de\u7684\u5bf9\u8c61\u4e0d\u5177\u6709constructor\u5c5e\u6027\uff0cinstanceof<\/code>\u6ca1\u6cd5\u7528\uff0c\u4f46\u5982\u679c\u4f60\u4e0d\u9700\u8981instanceof<\/code>\uff0c\u4e5f\u4e0d\u9700\u8981\u8bbe\u8ba1\u591a\u5c42\u7684\u7ee7\u627f\uff0c\u8fd9\u662f\u53ef\u7528\u7684\u65b9\u6cd5\uff1b<\/p>\n
          \u603b\u7ed3\u4e00\u4e0b\u5173\u4e8e\u6784\u9020\u51fd\u6570\u7684\u8fd9\u4e00\u8282\uff1b<\/p>\n
          \u9996\u5148JavaScript\u5728\u5b9a\u4e49\u51fd\u6570\u65f6\uff0c\u5e76\u4e0d\u533a\u5206\u8fd9\u4e2a\u51fd\u6570\u662f\u4e0d\u662f\u6784\u9020\u51fd\u6570\uff0c\u662f\u5426\u662f\u6784\u9020\u51fd\u6570\u53d6\u51b3\u4e8e\u4f60\u662f\u5426\u4f7f\u7528new<\/code>\u8c03\u7528\uff1b<\/p>\n
          \u5176\u6b21\uff0c\u5982\u679c\u4e00\u4e2a\u51fd\u6570\u662f\u6784\u9020\u51fd\u6570\uff0c\u5b83\u4e0d\u662f\u4e00\u4e2a\u4eba\u5728\u6218\u6597\uff0c\u5b83\u9700\u8981\u548c\u5b83\u7684prototype\u5c5e\u6027\u6307\u5411\u7684\u5bf9\u8c61\u5408\u4f5c\uff0c\u8be5\u5bf9\u8c61\u5c06\u662f\u6784\u9020\u7684\u5bf9\u8c61\u7684\u539f\u578b\uff0c\u8bf7\u628a\u4e24\u4e2a\u5bf9\u8c61\u800c\u4e0d\u662f\u4e00\u4e2a\u5bf9\u8c61\u5370\u5728\u8111\u5b50\u91cc\uff0c\u8fd9\u5bf9\u540e\u9762\u7406\u89e3\u7ee7\u627f\u975e\u5e38\u5173\u952e\uff1b<\/p>\n
          \u7b2c\u4e09\uff0c\u548cJava\u91cc\u90a3\u79cd\u6570\u636e\u6210\u5458\u548c\u65b9\u6cd5\u6210\u5458\u5728\u5fc3\u7406\u4e0a\u4f4d\u4e8e\u4e00\u4e2a\u5bf9\u8c61\u5bb9\u5668\u5185\u4e0d\u540c\uff0cJavaScript\u7684\u5bf9\u8c61\u5728\u8bbe\u8ba1\u4e0a\u5c31\u8981\u7406\u89e3\u4e3a\u6570\u636e\uff08\u6216\u8005\u72b6\u6001\uff09\u5728\u81ea\u5df1\u8eab\u4e0a\uff0c\u65b9\u6cd5\uff08\u51fd\u6570\u5bf9\u8c61\uff09\u5728\u539f\u578b\u8eab\u4e0a\uff0c\u8fd9\u4ecd\u7136\u662f\u4e24\u4e2a\u5bf9\u8c61\u5728\u5408\u4f5c\uff0c\u8868\u73b0\u5f97\u8c61\u4e00\u4e2a\u5bf9\u8c61\u3002<\/p>\n
           <\/p>\n
          \u7ee7\u627f<\/h2>\n
          JavaScript\u91cc\u7684\u7ee7\u627f\u4ecd\u7136\u4e0d\u662f\u8bed\u8a00\u7279\u6027\uff0c\u5728\u8fd9\u4e2a\u95ee\u9898\u4e0a\u6211\u4eec\u7ee7\u7eed\u6cbf\u7528\u524d\u9762\u7684\u601d\u8def\uff1a\u7528JavaScript\u7684\u539f\u578b\u91cd\u7528\u80fd\u529b\uff0c\u53bb\u6a21\u62df\uff0c\u6216\u8005\u8bf4\u5b9e\u73b0Java\u8bed\u8a00\u91cc\u7684\u7ee7\u627f\u5f62\u5f0f\u3002<\/p>\n
          \u6211\u4eec\u5148\u8bf4\u601d\u8def\uff0c\u5047\u60f3\u6211\u4eec\u5c31\u662fBrenden Eich\u51e0\u5206\u949f\u3002<\/p>\n
          \u5047\u5982\u6211\u4eec\u5df2\u7ecf\u7528\u6784\u9020\u5171\u4eab\u539f\u578b\u7684\u5bf9\u8c61\u7684\u601d\u8def\uff0c\u5199\u4e86\u4e00\u4e2a\u6784\u9020\u51fd\u6570BaseConstructor\uff0c\u5b83\u8d1f\u8d23\u521b\u5efa\u6bcf\u4e2a\u5bf9\u8c61\u7684\u6570\u636e\u6216\u72b6\u6001\u5c5e\u6027\uff0c\u4e5f\u6709\u4e86\u4e00\u4e2a\u5408\u4f5c\u8005BaseConstructor.prototype\uff0c\u5b83\u63d0\u4f9b\u4e86\u65b9\u6cd5BaseMethod1, …\uff1b\u73b0\u5728\u6211\u4eec\u9700\u8981\u62d3\u5c55\u5b83\uff0c\u8981\u589e\u52a0\u4e00\u90e8\u5206\u72b6\u6001\u6216\u8005\u5c5e\u6027\uff0c\u4e5f\u8981\u589e\u52a0\u4e00\u90e8\u5206\u65b9\u6cd5\uff0c\u6211\u4eec\u8be5\u600e\u4e48\u505a\uff1f<\/p>\n
          \u9996\u5148\u6211\u4eec\u8003\u8651\u62d3\u5c55\u65b9\u6cd5\uff0c\u8fd9\u4e0d\u96be\uff0c\u5982\u679c\u6211\u4eec\u6784\u5efa\u4e00\u4e2a\u5bf9\u8c61\uff0c\u628a\u5b83\u7684\u539f\u578b\u8bbe\u7f6e\u4e3aBaseConstructor.prototype\uff0c\u7136\u540e\u5728\u65b0\u5bf9\u8c61\u91cc\u6dfb\u52a0\u65b9\u6cd5\u5373\u53ef\uff1b<\/p>\n
          \u5176\u6b21\u6211\u4eec\u672a\u6765\u9700\u8981\u4f7f\u7528\u7684\u5bf9\u8c61\u5e94\u8be5\u90fd\u4ee5\u8be5\u5bf9\u8c61\u4e3a\u539f\u578b\uff0c\u56e0\u4e3a\u539f\u6709\u65b9\u6cd5\u548c\u6269\u5c55\u65b9\u6cd5\u90fd\u80fd\u901a\u8fc7\u5b83\u8bbf\u95ee\uff1b\u8fd9\u9884\u793a\u4e86\u6211\u4eec\u9700\u8981\u4e00\u4e2a\u65b0\u7684\u6784\u9020\u51fd\u6570\u4ee5\u8be5\u5bf9\u8c61\u4f5c\u4e3aprototype\u5c5e\u6027\uff1b\u903b\u8f91\u4e0a\u53ef\u4ee5\u662f\u8fd9\u6837\uff1a<\/p>\n
          Base<\/span>     <-> Base.prototype\r\n  ^<\/span>            ^<\/span>\r\n  |            *\r\n  | call       * __proto__\r\n  |            *\r\nExtended <-> Extended.prototype<\/code><\/pre>\n
          Extended\u51fd\u6570\u53ef\u4ee5\u521b\u5efaExtended.prototype<\/code>\u91cc\u6269\u5c55\u65b9\u6cd5\u6240\u9700\u8981\u7684\u72b6\u6001\u6216\u6570\u636e\u6210\u5458\uff1b\u4f46\u662fBase.prototype<\/code>\u91cc\u9700\u8981\u7684\u72b6\u6001\u6216\u8005\u6570\u636e\u6210\u5458\u9700\u8981Base<\/code>\u6765\u521b\u5efa\uff0c\u6211\u4eec\u80af\u5b9a\u4e0d\u5e0c\u671b\u628aBase<\/code>\u91cc\u7684\u4ee3\u7801\u590d\u5236\u4e00\u4efd\u5230Extended<\/code>\u5185\uff1b\u6211\u4eec\u9700\u8981\u8c03\u7528\u5b83\u6765\u521b\u5efa\u539f\u6709\u65b9\u6cd5\u6240\u9700\u7684\u72b6\u6001\u6216\u6570\u636e\u6210\u5458\u3002<\/p>\n
          function<\/span> Base<\/span>(name<\/span>) <\/span>{ this<\/span>.name = name}\r\nBase.prototype.printName = function<\/span>() <\/span>{ console<\/span>.log(this<\/span>.name) }\r\n\r\nfunction<\/span> Extended<\/span>(name, age<\/span>) <\/span>{\r\n  Base.bind(this<\/span>)(name)\r\n  this<\/span>.age = age\r\n}\r\nExtended.prototype = Object<\/span>.create(Base.prototype)\r\nExtended.prototype.constructor = Extended\r\nExtended.prototype.printAge = function<\/span>() <\/span>{ console<\/span>.log(this<\/span>.age) }<\/code><\/pre>\n
          \u8fd9\u91cctricky\u7684\u5730\u65b9\u6709\u51e0\u5904\uff1a<\/p>\n
          \u7b2c\u4e00\uff0c\u5728Extended<\/code>\u51fd\u6570\u5185\uff0c\u5148\u628athis<\/code>\u00a0bind\u5230Base\u6784\u9020\u51fd\u6570\u4e0a\uff0c\u7136\u540e\u63d0\u4f9bname<\/code>\u53c2\u6570\u8c03\u7528\u5b83\uff0c\u8fd9\u6837this<\/code>\u5c31\u4f1a\u5177\u6709printName<\/code>\u6240\u9700\u7684name<\/code>\u5c5e\u6027\uff0c\u5b9e\u73b0\u7ed3\u6784\u7ee7\u627f\uff1b<\/p>\n
          \u7b2c\u4e8c\uff0c\u6211\u4eec\u4f7f\u7528Object.create<\/code>\u65b9\u6cd5\u521b\u5efa\u4e86\u4e00\u4e2a\u4ee5Base.prototype<\/code>\u4e3a\u539f\u578b\u7684\u65b0\u5bf9\u8c61\uff0c\u628a\u5b83\u8bbe\u7f6e\u4e3aExtended.prototype<\/code>\uff0c\u5b9e\u73b0\u884c\u4e3a\u7ee7\u627f\uff1b<\/p>\n
          \u7b2c\u4e09\uff0c\u628aExtended.prototype.constructor<\/code>\u8bbe\u7f6e\u4e3aExtended<\/code>\u6784\u9020\u51fd\u6570\uff0c\u8fd9\u6837\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528instanceof<\/code>\u8bed\u6cd5\u7cd6\uff1b<\/p>\n
          \u6700\u540e\u6211\u4eec\u5728Extended<\/code>\u51fd\u6570\u5185\u521b\u5efa\u65b0\u7684\u72b6\u6001\u6216\u6570\u636e\u5c5e\u6027\uff0c\u6211\u4eec\u4e5f\u5728Extended.prototype<\/code>\u4e0a\u6dfb\u52a0\u65b0\u7684\u51fd\u6570\u65b9\u6cd5\uff1b<\/p>\n
          \u6216\u8005\u6211\u4eec\u8bf4\u6211\u4eec\u627e\u5230\u4e86\u4e00\u79cd\u65b9\u5f0f\u65e2\u62d3\u5c55\u4e86\u6784\u9020\u51fd\u6570\u6784\u9020\u7684\u65b0\u5bf9\u8c61\u7684\u6570\u636e\u5c5e\u6027\uff0c\u4e5f\u62d3\u5c55\u4e86\u5b83\u7684\u51fd\u6570\u5c5e\u6027\uff0c\u6cbf\u7740\u4e24\u6761\u94fe\u5e73\u884c\u5b9e\u65bd\uff0c\u8fbe\u5230\u4e86\u6211\u4eec\u7684\u76ee\u7684\u3002<\/p>\n
          \u5728JavaScript\u91cc\u4f7f\u7528\u8fd9\u79cd\u5728\u539f\u6709\u6784\u9020\u51fd\u6570\u53ca\u5176prototype\u5bf9\u8c61\u4e0a\u62d3\u5c55\u51fa\u4e00\u5bf9\u65b0\u7684\u6784\u9020\u51fd\u6570\u548cprototype\u5bf9\u8c61\u7684\u62d3\u5c55\u65b9\u5f0f\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a\u7ee7\u627f\u3002<\/p>\n
          \u56e0\u4e3a\u5bf9\u8c61\u53ef\u4ee5\u91cd\u8f7d\u539f\u578b\u5bf9\u8c61\u7684\u5c5e\u6027\uff0c\u6240\u4ee5\u5728function.prototype<\/code>\u7684\u539f\u578b\u94fe\u4e0a\uff0c\u91cd\u8f7d\u51fd\u6570\u7684\u80fd\u529b\u4e5f\u5177\u6709\u4e86\u3002<\/p>\n
           <\/p>\n
          Class<\/h2>\n
          JavaScript\u91cc\u6ca1\u6709type\u7cfb\u7edf\u610f\u4e49\u4e0a\u7684Class\u7684\u6982\u5ff5\u3002class<\/code>\u5173\u952e\u5b57\u4ecd\u7136\u662f\u8bed\u6cd5\u7cd6\u3002<\/p>\n
          class<\/span> A<\/span> {\r\n\r\n  constructor<\/span> () { \/\/ \u8fd9\u662f\u6784\u9020\u51fd\u6570<\/span>\r\n  }\r\n\r\n  method<\/span>() { \/\/ \u8fd9\u662fA.prototype\u4e0a\u7684\u65b9\u6cd5<\/span>\r\n  }\r\n}<\/code><\/pre>\n
          \u8fd9\u4e2a\u8bed\u6cd5\u6bd4\u524d\u9762\u5206\u5f00\u5199\u6784\u9020\u51fd\u6570\u548cprototype\u5bf9\u8c61\u7684\u5199\u6cd5\u8981\u7b80\u6d01\u5e72\u51c0\u5f88\u591a\uff0c\u4f46\u662f\u5e26\u7740Java\u7684Class\u7684\u6982\u5ff5\u8bd5\u56fe\u53bb\u7406\u89e3\u5b83\uff0c\u66f4\u5bb9\u6613\u88ab\u8bef\u5bfc\u4e86\u3002<\/p>\n
          A<\/code>\u5728\u8fd9\u91cc\u4ecd\u7136\u662f\u51fd\u6570\u5bf9\u8c61\uff0c\u53ea\u4e0d\u8fc7\u5b83\u53ea\u80fd\u5f53\u6784\u9020\u51fd\u6570\u7528\uff0c\u5fc5\u987b\u7528new<\/code>\u8c03\u7528\uff1b\u5176\u4ed6\u8fd8\u6709\u4e00\u4e9b\u7ec6\u8282\u5dee\u5f02\uff0c\u4e0d\u8d58\u8ff0\u4e86\uff1b<\/p>\n
          \u5982\u679c\u662f\u7ee7\u627f\u5462\uff1f<\/p>\n
          class<\/span> Base<\/span> <\/span>{\r\n  constructor() {}\r\n  method1() {}\r\n}\r\n\r\nclass<\/span> Extended<\/span> extends<\/span> Base<\/span> <\/span>{\r\n  constructor() {\r\n    super<\/span>()\r\n    \/\/...<\/span>\r\n  }\r\n  method2() {}\r\n}<\/code><\/pre>\n
          \u4e5f\u662f\u5927\u540c\u5c0f\u5f02\uff1bExtended<\/code>\u6784\u9020\u51fd\u6570\u5185\u9700\u8981\u8c03\u7528super()<\/code>\u6765\u5b9e\u73b0\u8c03\u7528Base<\/code>\u6784\u9020\u51fd\u6570\u6784\u9020\u5c5e\u6027\uff1b\u8fd9\u4e00\u53e5\u5fc5\u987b\u8c03\u7528\uff0c\u5426\u5219\u6ca1\u6709this<\/code>\uff0c\u8fd9\u662fclass\u8bed\u6cd5\u548c\u524d\u9762ES5\u8bed\u6cd5\u7684\u4e00\u4e2a\u5dee\u5f02\uff0c\u5728ES5\u8bed\u6cd5\u5185\uff0c\u65b0\u5bf9\u8c61\u662f\u5728\u8c03\u7528Extended<\/code>\u6784\u9020\u51fd\u6570\u65f6\u7acb\u523b\u521b\u5efa\u7684\uff0c\u5728class\u8bed\u6cd5\u4e2d\uff0c\u8fd9\u4e2a\u5bf9\u8c61\u662f\u6cbf\u7740super()<\/code>\u5411\u4e0a\u722c\u5230\u6700\u9876\u5c42\u6784\u9020\u51fd\u6570\u624d\u521b\u5efa\u7684\uff0c\u6240\u4ee5\u5982\u679c\u4e0d\u8c03\u7528super<\/code>\u5c31\u6ca1this<\/code>\u4e86\u3002<\/p>\n
          \u5b9e\u9645\u4e0a\u5728JavaScript\u91cc\u7684\u7ee7\u627f\uff0c\u5e94\u8be5\u5f53\u4f5c\u4e00\u79cdPattern\u6765\u7406\u89e3\uff0c\u5373\uff1a\u4f7f\u7528\u6784\u9020\u51fd\u6570\u548c\u5b83\u7684prototype\u5c5e\u6027\u5bf9\u8c61\u5408\u4f5c\u6765\u6a21\u62df\u4f20\u7edfOO\u8bed\u8a00\u91cc\u7684\u7ee7\u627f\u5f62\u5f0f\uff0c\u628a\u5b83\u53eb\u505aInheritance Pattern<\/code>\u6070\u5f53\u7684\u591a\u3002<\/p>\n
           <\/p>\n
          \u51fd\u6570\u4f5c\u7528\u57df<\/h2>\n
          \u524d\u9762\u6211\u4eec\u66fe\u5192\u5145\u4e0a\u5e1d\uff0c\u5047\u60f3\u4e00\u4e2aJavaScript\u7a0b\u5e8f\u542f\u52a8\u540e\uff0c\u5982\u4f55\u4ece\u96f6\u5f00\u59cb\u6784\u9020\u6574\u4e2a\u5bf9\u8c61\u4e16\u754c\uff1b\u73b0\u5728\u6211\u4eec\u5f97\u5bf8\u8fdb\u5c3a\uff0c\u5192\u5145\u4e0a\u5e1d\u4ed6\u5988\uff0c\u8003\u8651\u7ad9\u5728\u6267\u884c\u5668\u7684\u89c6\u89d2\u4e0a\uff0c\u5982\u679c\u62ff\u5230\u4e00\u4efdJavaScript\u811a\u672c\u5982\u4f55\u6267\u884c\uff1b<\/p>\n
          \u5047\u5b9a\u6211\u4eec\u5df2\u7ecf\u4f7f\u7528\u4e86\u5e95\u5c42\u8bed\u8a00\uff0c\u4f8b\u5982C\/C++\uff0c\u5b9e\u73b0\u4e86JavaScript\u7684\u5bf9\u8c61\u6a21\u578b\uff0c\u5373\u5f88\u5bb9\u6613\u521b\u5efa\u5bf9\u8c61\uff0c\u7ef4\u62a4\u539f\u578b\u94fe\u3002<\/p>\n
          \u6211\u4eec\u5148\u521b\u5efa\u4e00\u4e2a\u7a7a\u5bf9\u8c61\uff0c\u628a\u5b83\u79f0\u4e3aglobal\uff0c\u5148\u628a\u6807\u51c6\u7684\u5185\u7f6e\u5bf9\u8c61\u90fd\u4f5c\u4e3a\u5168\u5c40\u53d8\u91cf\u540d\u79f0\u88c5\u8f7d\u8fdb\u53bb\uff1b\u7136\u540e\u5f00\u59cb\u8fd0\u884c\u3002<\/p>\n
          JavaScript\u662f\u4e2a\u5355\u7ebf\u7a0b\u6a21\u578b\uff0c\u6240\u4ee5\u5047\u5b9a\u6211\u4eec\u7528\u6808\u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\u8ba1\u7b97\uff1b\u57fa\u672c\u64cd\u4f5c\u7b26\u548c\u8868\u8fbe\u5f0f\u7684\u6808\u8ba1\u7b97\u5c31\u4e0d\u591a\u8bf4\u4e86\uff0c\u6211\u4eec\u53ea\u8bf4\u9047\u5230\u51fd\u6570\u600e\u4e48\u529e\u3002<\/p>\n
          \u4e00\u822c\u6765\u8bf4\u9047\u5230\u51fd\u6570\u5e94\u8be5\u7ea6\u5b9a\u5728\u6808\u4e0a\u5904\u7406\u53c2\u6570\u548c\u8fd4\u56de\u503c\u7684\u65b9\u5f0f\uff0c\u4f46\u8fd9\u4e2a\u65e0\u5173\u7d27\u8981\uff0c\u6709\u5173\u7d27\u8981\u7684\u95ee\u9898\u662f\u6211\u4eec\u9700\u8981\u628a\u4f20\u7edf\u7684Function Frame\u7684\u6982\u5ff5\uff0c\u5373\u5bf9\u4e00\u4e2a\u51fd\u6570\u5728\u6808\u4e0a\u5206\u914d\u5c40\u90e8\u53d8\u91cf\u7684\u6982\u5ff5\uff0c\u6362\u4e2a\u601d\u7ef4\uff0c\u6211\u4eec\u4e0d\u7528Function Frame\uff0c\u800c\u662f\u521b\u5efa\u4e00\u4e2a\u7a7a\u5bf9\u8c61\u6765\u8868\u5f0f\u4e00\u4e2aFunction Frame\uff0c\u6211\u4eec\u4e00\u884c\u4e00\u884c\u7684\u8bfb\u5165\u4ee3\u7801\uff0c\u9047\u5230\u5c40\u90e8\u53d8\u91cf\u58f0\u660e\u5c31\u5728\u8fd9\u4e2a\u5bf9\u8c61\u4e0a\u88c5\u4e0a\u4e00\u4e2a\u5c5e\u6027\uff0c\u9047\u5230\u4fee\u6539\u5c40\u90e8\u53d8\u91cf\u7684\u65f6\u5019\u5c31\u7ed9\u5b83\u8d4b\u503c\uff1b<\/p>\n
          \u5982\u679c\u8fd9\u6837\u505a\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u628aFunction Scope(\u4e00\u822c\u8bf4Function Scope\u6307\u7684\u662f\u4ee3\u7801\u5c42\u9762\u7684Lexical Scope\uff0c\u8fd9\u91cc\u6211\u4eec\u628aFunction Scope\u548cFunction Frame\u6df7\u7528)\u4f5c\u4e3a\u539f\u578b\u94fe\u4e32\u8d77\u6765\uff0c\u8bcd\u6cd5\u57df\u4e2d\u5916\u56f4\u7684Function Scope\u662f\u539f\u578b\uff0c\u5185\u90e8\u7684Function Scope\u662f\u5bf9\u8c61\uff1b\u8fd9\u6837Function Scope\u7684\u5f15\u7528\u53ef\u80fd\u51fa\u73b0\u5728\u6808\u4e0a\uff0c\u4f46\u5b83\u672c\u8eab\u5e76\u975e\u5206\u914d\u5728\u6808\u4e0a\uff1bFunction Scope\u5bf9\u8c61\u7684\u521b\u5efa\u662f\u5728\u8c03\u7528\u51fd\u6570\u65f6\uff0c\u5b83\u7684\u9500\u6bc1\u6211\u4eec\u53ef\u4ee5\u6682\u65f6\u6307\u671b\u5783\u573e\u56de\u6536\u5668\uff0c\u53ef\u56de\u6536\u7684\u65f6\u95f4\u662f\u8be5\u51fd\u6570\u5df2\u7ecf\u5b8c\u6210\u6267\u884c\u4e14\u6ca1\u6709\u5176\u4ed6Function Scope\u5f15\u7528\u8be5Scope\uff1b<\/p>\n
          \u5982\u679c\u4f60\u4ed4\u7ec6\u89c2\u5bdf\u5728Function Scope\u6784\u6210\u7684\u94fe\u4e0a\u67e5\u627e\u53d8\u91cf\u540d(Identifier)\u7684\u65f6\u5019\uff0c\u5176\u903b\u8f91\u548c\u5728\u539f\u578b\u94fe\u4e0a\u67e5\u627e\u5c5e\u6027\u7684\u65b9\u5f0f\u4e00\u6a21\u4e00\u6837\uff1b\u7528\u8fd9\u6837\u7684\u65b9\u5f0f\u4e5f\u53ef\u4ee5\u51c6\u786e\u627e\u5230\u95ed\u5305\u53d8\u91cf\uff0c\u552f\u4e00\u7684\u533a\u522b\u662f\u8fd9\u91cc\u9700\u8981\u5c0f\u5c0f\u7684\u4fee\u6539\u4e00\u4e0b\u539f\u578b\u94fe\u7684\u7ea6\u5b9a\uff0c\u539f\u578b\u4e0a\u7684\u5c5e\u6027\u53ef\u4ee5\u76f4\u63a5\u4fee\u6539\uff0c\u56e0\u4e3a\u95ed\u5305\u53d8\u91cf\u662f\u53ef\u4ee5\u8d4b\u503c\u7684\uff1b<\/p>\n
          \u8fd9\u5c31\u662f\u524d\u9762\u6211\u4eec\u8bf4Function Scope\u4e5f\u53ef\u4ee5\u5f53\u4f5c\u662f\u5bf9\u8c61\u5904\u7406\u7684\u539f\u56e0\u3002<\/p>\n
          \u4f60\u53ef\u4ee5\u60f3\u8c61\u51fa\u6765\u8fd9\u4e2a\u89e3\u91ca\u5668\u53ef\u4ee5\u5199\u5f97\u591a\u5c0f\u548c\u591a\u7b80\u5355\uff0c\u800c\u4e14\u5982\u679c\u6ca1\u6709hoisting\uff0c\u5b83\u53ef\u4ee5\u5728\u6e90\u6587\u4ef6\u8fd8\u6ca1\u4e0b\u8f7d\u5b8c\u5c31\u5f00\u59cb\u6295\u5165\u8fd0\u884c\uff0c\u800c\u4e0d\u662f\u4e00\u5f00\u59cb\u5c31\u628a\u6574\u4e2a\u8bed\u6cd5\u6811\u90fd\u89e3\u6790\u51fa\u6765\uff1b<\/p>\n
          \u5982\u679c\u4f60\u95ee\u4e3a\u4ec0\u4e48\u65e9\u671f\u7684JavaScript\u7684var<\/code>\u6ca1\u6709block scope\u652f\u6301\uff0c\u56e0\u4e3ablock scope\u6309\u7167\u8fd9\u79cd\u601d\u8def\u6765\u8bf4\uff0c\u9700\u8981\u4e3ablock scope\u5355\u72ec\u521b\u5efa\u5bf9\u8c61\u3002<\/p>\n
          \u6240\u4ee5\u5728\u8fd9\u4e2a\u8ba8\u8bba\u91cc\uff0c\u4f60\u80fd\u5bf9JavaScript\u6700\u521d\u5471\u5471\u5760\u5730\u65f6\u7684\u4e00\u4e9b\u5c0f\u60f3\u6cd5\u83b7\u5f97\u4e00\u4e9b\u611f\u53d7\uff1b\u5b83\u4ece\u4e00\u5f00\u59cb\u53ea\u60f3\u7528\u4e00\u4e2a\u4ee4\u4eba\u9707\u60ca\u7684\u7b80\u5355\u7684\u65b9\u6cd5\u505a\u51e0\u4ef6\u7b80\u5355\u7684\u5c0f\u4e8b\u60c5\uff0c\u6bd4\u5982\u8d5a\u4e00\u4e2a\u4ebf\uff0c\u4f46\u8fd9\u5e76\u4e0d\u8bf4\u660e\u5b83\u65e0\u80fd\uff0c\u76f8\u53cd\uff0c\u5728\u6570\u5b66\u548c\u7f16\u7a0b\u7684\u4e16\u754c\u91cc\uff0c\u8d8a\u662f\u7b80\u5355\u7684\u4e8b\u60c5\u8d8a\u6709\u65e0\u7a77\u65e0\u5c3d\u7684\u80fd\u91cf\u3002<\/p>\n
          \u5199\u5230\u8fd9\u91cc\uff0c\u6211\u60f3\u6211\u8bf4\u5b8c\u4e86\u81ea\u5df1\u5bf9JavaScript\u7684\u4e00\u5207\u7686\u5bf9\u8c61\u7684\u8ba4\u77e5\uff0c\u6b22\u8fce\u63a2\u8ba8\u3002<\/p>\n
          \u6700\u540e\u9e23\u8c22\u5c11\u5987\u767d\u6d01\u613f\u610f\u51fa\u73b0\u5728\u672c\u6587\u9898\u76ee\u4e2d\u3002<\/p>\n
          \u6211\u4e0d\u786e\u5b9aJavaScript\u8bed\u8a00\u662f\u5426\u5e94\u8be5\u88ab\u79f0\u4e3aObject-Oriented\uff0c\u56e0\u4e3aObject Oriented\u662f\u4e00\u7ec4\u8bed\u8a00\u7279\u6027\u3001\u7f16\u7a0b\u6a21\u5f0f\u3001\u548c\u8bbe\u8ba1\u4e0e\u5de5\u7a0b\u65b9\u6cd5\u7684\u7b3c\u7edf\u79f0\u8c13\uff0c\u6ca1\u6709\u4e00\u4e2a\u8be6\u5c3d\u548c\u5927\u5bb6\u90fd\u8ba4\u53ef\u7684checklist\u53bb\u6bd4\u8f83\uff0c\u5c31\u5f88\u96be\u5728\u4e3b\u89c2\u610f\u89c1\u4e0a\u4e92\u76f8\u8ba4\u540c\u3002<\/p>\n
          \u4f46JavaScript\u767e\u5206\u4e4b\u4e00\u767e\u662f\u4e00\u95e8Object\u8bed\u8a00\u3002<\/p>\n
          \u8fd9\u53e5\u8bdd\u6709\u4e24\u4e2a\u76f4\u63a5\u542b\u4e49\uff1a<\/p>\n
            \n
          1. \u9664\u4e86\u539f\u59cb\u7c7b\u578b(primitive type)\u503c\u4e4b\u5916\uff0c\u4e00\u5207\u7686\u5bf9\u8c61\uff0c\u5305\u62ec\u51fd\u6570\uff1b<\/li>\n
          2. \u4e00\u5207\u5bf9\u8c61\u90fd\u662f\u6784\u9020\u51fa\u6765\u7684\uff0c\u6709\u4e00\u4e2a\u51fd\u6570\u4f5c\u4e3a\u5b83\u7684\u6784\u9020\u51fd\u6570\uff08constructor\uff09\uff1b<\/li>\n<\/ol>\n
            JavaScript\u7684\u53e6\u4e00\u4e2a\u6807\u5fd7\u6027\u7279\u6027\u662f\u539f\u578b\u91cd\u7528(prototype-based reuse)\uff0c\u6211\u5728\u8fd9\u91cc\u6545\u610f\u907f\u514d\u4f7f\u7528\u7ee7\u627f(inheritance)\u8fd9\u4e2a\u8bcd\u8bed\uff0c\u662f\u4e0d\u60f3\u8ba9\u8bfb\u8005\u7acb\u523b\u8054\u60f3C++\/Java\u8bed\u8a00\u7684\u7ee7\u627f\uff0c\u8bf7\u5fd8\u8bb0\u5b83\u4eec\uff1b<\/p>\n
            JavaScript\u91cc\u7684\u5bf9\u8c61\u5e76\u975e\u662fClass\u7684\u5b9e\u4f8b\u5316\uff0c\u5b83\u6ca1\u6709\u9759\u6001\u7ed3\u6784\u7684\u6982\u5ff5\uff1b\u5f53\u7136\u8fd9\u4e0d\u610f\u5473\u8fd9\u5bf9\u8c61\u6ca1\u6709\u7ed3\u6784\uff0c\u4f46\u5bf9\u8c61\u7684\u7ed3\u6784\u53ea\u80fd\u7531\u6784\u9020\u51fd\u6570\u5728\u8fd0\u884c\u65f6\u6784\u9020\u51fa\u6765\uff0c\u56e0\u6b64\u6784\u9020\u51fd\u6570\u5728JavaScript\u91cc\u7684\u5730\u4f4d\u662f\u5f88\u9ad8\u7684\uff0c\u5b83\u662f\u552f\u4e00\u8d1f\u8d23\u7ed3\u6784\u7684\u5730\u65b9\u3002<\/p>\n
              \n
            1. \u6bcf\u4e2a\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a\u539f\u578b\uff0c\u5bf9\u8c61\u53ef\u4ee5\u4f7f\u7528\u548c\u91cd\u8f7d\u539f\u578b\u5bf9\u8c61\u4e0a\u7684\u6570\u636e\u6210\u5458\u6216\u65b9\u6cd5\uff0c\u8fd9\u662f\u5bf9\u8c61\u7684\u552f\u4e00\u91cd\u7528\u673a\u5236\uff1b<\/li>\n<\/ol>\n
              \u4ecb\u7ecd\u539f\u578b\u6982\u5ff5\u7684\u6587\u7ae0\u548c\u4e66\u5f88\u591a\uff0c\u5047\u5b9a\u4f60\u7406\u89e3\u539f\u578b\u7684\u57fa\u672c\u6982\u5ff5\uff1b\u8fd9\u91cc\u9700\u8981\u6307\u51fa\u7684\u95ee\u9898\u662f\uff0c\u5bf9\u8c61\u4e4b\u95f4\u7684\u5c5e\u6027\u91cd\u7528\uff0c\u548c\u9762\u5411\u5bf9\u8c61\u91cc\u9762\u8bf4\u7684\u91cd\u7528\u662f\u4e24\u56de\u4e8b\uff1b<\/p>\n
              \u4f60\u53ef\u4ee5\u4ece\u91cd\u7528\u7684\u5982\u6b64\u7b80\u5355\u7684\u5b9a\u4e49\u770b\u51fa\uff0c\u5b83\u552f\u4e00\u7684\u8bbe\u8ba1\u76ee\u7684\u662f\u60f3\u51cf\u5c11\u5bf9\u8c61\u7684\u6570\u91cf\uff0c\u5b83\u63d0\u4f9b\u7684\u673a\u5236\u5c31\u662f\u8ba9\u591a\u4e2a\u5bf9\u8c61\u5171\u4eab\u539f\u578b\u5bf9\u8c61\u4e0a\u7684\u5c5e\u6027\uff0c\u540c\u65f6\u53c8\u53ef\u4ee5\u6709\u91cd\u8f7d\u80fd\u529b\uff1b<\/p>\n
              \u4f46\u4e0d\u8981\u5bf9\u6b64\u6d6e\u60f3\u8fde\u7bc7\uff0c\u5b83\u548cJava\u8bed\u8a00\u91cc\u901a\u8fc7\u7ee7\u627f\u91cd\u7528\u9759\u6001\u7ed3\u6784\u548c\u884c\u4e3a\u662f\u5b8c\u5168\u4e24\u56de\u4e8b\uff0c\u5373\u4f7f\u8bf4\u201cJavaScript\u7684\u539f\u578b\u5316\u91cd\u7528\u4ec5\u4ec5\u662f\u884c\u4e3a\u91cd\u7528\uff0c\u800cJava\u7684\u91cd\u7528\u662f\u7ed3\u6784\u548c\u884c\u4e3a\u7684\u53cc\u91cd\u91cd\u7528\u201d\uff0c\u8fd9\u6837\u7684\u8868\u8ff0\u4e5f\u6ca1\u6709\u610f\u4e49\uff0c\u56e0\u4e3a\u524d\u8005\u5728\u8fd0\u884c\u65f6\u5bf9\u8c61\u4e4b\u95f4\u53d1\u751f\u540e\u8005\u5728\u9759\u6001\u7f16\u8bd1\u65f6\u53d1\u751f\uff0c\u4e00\u4e2a\u5728\u8bf4\u6211\u4eec\u53d1\u660e\u4e86\u6d3b\u5b57\u5370\u5237\u672f\u8ba9\u5370\u5237\u53d8\u5f97\u66f4\u5bb9\u6613\uff0c\u53e6\u4e00\u4e2a\u5728\u8bf4\u6211\u4eec\u53d1\u660e\u4e86\u7535\u8111\u4e0a\u7684\u5b57\u4f53\uff0c\u4f60\u9700\u8981\u663e\u793a\u54ea\u4e2a\u5b57\u5c31\u6765\u5230\u6211\u8fd9\u91cc\u62ff\uff1b\u867d\u7136\u7ed3\u679c\u6709\u65f6\u770b\u8d77\u6765\u5f88\u50cf\uff0c\u4f46\u662f\u673a\u5236\u4e0a\u5b8c\u5168\u98ce\u9a6c\u725b\u4e0d\u76f8\u53ca\uff0c\u4e0d\u8981\u4e0a\u4e86\u962e\u4e00\u5cf0\u8001\u5e08\u7684\u5f53\u3002<\/p>\n
              \u524d\u9762\u5199\u7684\u8fd9\u4e09\u6761\uff0c\u53ef\u4ee5\u4f5c\u4e3a\u6784\u9020JavaScript\u5bf9\u8c61\u7cfb\u7edf\u7684\u4e09\u4e2a\u57fa\u7840\u5047\u8bbe\uff1b<\/p>\n
              \u5728JavaScript\u91cc\u6700\u6700\u5e95\u5c42\u7684\u6982\u5ff5\uff0c\u5e76\u975e\u4f60\u5728\u5982\u4f55\u4f7f\u7528JavaScript\u8bed\u8a00\u7684\u90a3\u4e9b\u6559\u6750\u4e2d\u770b\u5230\u7684\u79cd\u79cd\u7f16\u7a0b\u6982\u5ff5\uff0c\u800c\u662f\u4e24\u4e2a\u8bcd\u8bed\uff1a\u6784\u9020\u548c\u539f\u578b(\u6216\u8005\u8bf4\u7ed3\u6784\u4e0e\u91cd\u7528)\u3002<\/p>\n
              \u6bcf\u4e2a\u5bf9\u8c61\u5fc5\u6709\u6784\u9020\u51fd\u6570\u548c\u539f\u578b\uff0c\u6574\u4e2aJavaScript\u7cfb\u7edf\u91cc\u4f60\u770b\u5230\u7684\u6240\u6709\u4e1c\u897f\uff0c\u90fd\u53ef\u4ee5\u5728\u6982\u5ff5\u6216\u6a21\u578b\u4e0a\u8fd9\u6837\u53bb\u7406\u89e3\uff0c\u867d\u7136\u5b9e\u73b0\u4e0a\u662f\u53e6\u4e00\u56de\u4e8b\u3002<\/p>\n
              JavaScript\u5bf9\u8fd0\u884c\u73af\u5883(runtime)\u7684\u5047\u8bbe\u53ea\u6709\u4e00\u4e2a\uff0c\u5c31\u662f\u5355\u7ebf\u7a0b\u4e8b\u4ef6\u6a21\u578b\uff0c\u5176\u4ed6\u5173\u4e8e\u865a\u62df\u673a\u8be5\u600e\u6837\u5b9e\u73b0\u5e76\u65e0\u5b9a\u4e49\uff0c\u4e5f\u6ca1\u6709bytecode\u7684\u5b9a\u4e49\uff1bECMA262\u91c7\u7528\u4e86\u4e00\u79cd\u7c7b\u4f3c\u4f2a\u7801\u7684\u65b9\u5f0f\u5b9a\u4e49\u4e86\u5bf9\u5bf9\u8c61\u3001\u5c5e\u6027\u3001\u51fd\u6570\u7684\u57fa\u672c\u64cd\u4f5c\u903b\u8f91\uff0c\u6240\u6709\u5b9e\u73b0\uff0c\u89e3\u91ca\u5668\u4e5f\u597d\uff0cJIT\u4e5f\u597d\uff0c\u65e0\u8bba\u5982\u4f55\u6267\u884cJavaScript\u811a\u672c\uff0c\u53ea\u8981\u4fdd\u8bc1\u8bed\u4e49\u4e00\u81f4\u5373\u53ef\uff1b\u5176\u5b9e\u8fd9\u79cd\u4f2a\u7801\u5b9a\u4e49\u65b9\u5f0f\u672c\u8eab\uff0c\u5c31\u6697\u793a\u4e86\u67d0\u79cd\u7279\u6027\uff0c\u4f46\u6211\u4eec\u6682\u4e14\u4e0d\u8868\u3002<\/p>\n
              \u5355\u7ebf\u7a0b\u7684\u4e8b\u4ef6\u6a21\u578b\u4e0d\u662f\u4e07\u80fd\u7684\uff0c\u4f46\u7edd\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u8ba9\u7f16\u7a0b\u53d8\u5f97\u7b80\u5355\uff1b\u7f3a\u4e4fruntime\u5b9a\u4e49\u4f7f\u5f97\u8fd9\u95e8\u8bed\u8a00\u5e76\u4e0d\u5b9e\u7528\uff0c\u5f00\u53d1\u8005\u603b\u662f\u9700\u8981\u5b8c\u6574\u7684\u4e1c\u897f\uff0c\u4f46\u597d\u5728JavaScript\u81ea\u8bde\u751f\u8d77\u5c31\u6709\u4e86\u7b2c\u4e00\u4e2aruntime\uff1a\u7f51\u7edc\u6d4f\u89c8\u5668\uff0c\u8fd9\u8ba9\u5b83\u6709\u4e86\u7acb\u8db3\u4e4b\u5730\uff0c\u4e4b\u540e\u53c8\u51fa\u73b0Node.js\uff0c\u5b83\u53c8\u627e\u5230\u4e00\u4e2a\u53ef\u4ee5\u751f\u5b58\u7684\u5730\u65b9\u3002<\/p>\n
              \u626f\u8fdc\u4e86\uff0c\u6211\u4eec\u8bf4\u56de\u6784\u9020\u548c\u539f\u578b\u7684\u95ee\u9898\u3002<\/p>\n
               <\/p>\n
              \u521b\u4e16\u7eaa<\/h2>\n
              \u5047\u5982\u4eca\u5929\u6211\u4eec\u5192\u5145\u4e0a\u5e1d\uff0c\u5f00\u59cb\u6784\u9020JavaScript\u7684\u5bf9\u8c61\u4e16\u754c\uff0c\u5728\u8fd9\u4e2a\u4e16\u754c\u91cc\u6ca1\u6709\u4ec0\u4e48\u4e0d\u662f\u5bf9\u8c61\uff0c\u4e5f\u9075\u5faa\u524d\u8ff0\u539f\u5219\uff1b<\/p>\n
              \u6211\u4eec\u5f00\u59cb\u72af\u6101\u7684\u7b2c\u4e00\u4e2a\u95ee\u9898\uff0c\u4f3c\u4e4e\u6211\u4eec\u6389\u8fdb\u4e86\u9e21\u751f\u86cb\u86cb\u751f\u9e21\u7684\u903b\u8f91\u602a\u5708\u3002<\/p>\n
              \u5bf9\u5427\uff0c\u7b2c\u4e00\u4e2a\u5bf9\u8c61\u9020\u4e0d\u51fa\u6765\uff0c\u56e0\u4e3a\u5bf9\u8c61\u9700\u8981\u6784\u9020\u51fd\u6570\u6784\u9020\uff0c\u800c\u51fd\u6570\u4e5f\u662f\u5bf9\u8c61\uff0c\u6240\u4ee5\u6211\u4eec\u524d\u9762\u8bf4\u7684\u90a3\u4e2a\u5bf9\u8c61\u5fc5\u7136\u4e0d\u662f\u7b2c\u4e00\u4e2a\u5bf9\u8c61\u3002<\/p>\n
              \u5f53\u7136\u903b\u8f91\u662f\u903b\u8f91\uff0c\u6211\u4eec\u53ef\u4ee5\u5148\u634f\u51e0\u4e2a\u6700\u539f\u59cb\u7684\u5bf9\u8c61\u51fa\u6765\uff0c\u7136\u540e\u628aconstructor<\/code>\u548c__proto__<\/code>\u5f15\u7528\u88c5\u8f7d\u4e0a\u53bb\uff0c\u8ba9\u5b83\u4eec\u6210\u4e3a\u7cfb\u7edf\u6700\u521d\u7684\u4e9a\u5f53\u548c\u590f\u5a03\u3002\u53cd\u6b63\u4e0a\u5e1d\u672c\u6765\u4e5f\u56de\u7b54\u4e0d\u4e86\u4e9a\u5f53\u7684\u5988\u662f\u8c01\u7684\u95ee\u9898\uff0c\u6211\u4eec\u4e5f\u8fd9\u4e48\u505a\u3002<\/p>\n
              \u6700\u521d\u5728ECMA262\u91cc\u5e76\u6ca1\u6709\u7ea6\u5b9aJavaScript\u5b9e\u73b0\u5fc5\u987b\u63d0\u4f9b\u80fd\u8bbf\u95ee\u6bcf\u4e2a\u5bf9\u8c61\u7684\u539f\u578b\u5bf9\u8c61\u7684\u65b9\u6cd5\uff0c\u5b83\u53ea\u662f\u4e00\u4e2a\u6982\u5ff5\uff1b\u4f46\u662fnode\/v8\u548cjs shell\u90fd\u63d0\u4f9b\u4e86__proto__<\/code>\u8fd9\u4e2a\u540d\u5b57\u7684\u5c5e\u6027\uff0c\u53ef\u4ee5\u7ed9\u51fa\u4efb\u4f55\u5bf9\u8c61\u7684\u539f\u578b\uff1b\u53e6\u4e00\u4e2a\u65b9\u6cd5\u662f\u4f7f\u7528Object.getPrototypeOf\u65b9\u6cd5\u3002<\/p><\/blockquote>\n
              \u6ce8\u610f__proto__<\/code>\u548cfunction\u5bf9\u8c61\u7684prototype\u5c5e\u6027\u662f\u4e24\u56de\u4e8b\uff0cprototype\u662ffunction\u5bf9\u8c61\u7684\u7279\u6709\u5c5e\u6027(\u5c31\u50cfArray\u5bf9\u8c61\u6709length\u8fd9\u4e2a\u7279\u6709\u5c5e\u6027)\uff0c__proto__<\/code>\u624d\u662f\u5bf9\u8c61\u7684\u539f\u578b\uff1b\u4e0b\u9762\u7684\u63cf\u8ff0\u548c\u4ee3\u7801\u91cc\u90fd\u4f7f\u7528__proto__<\/code>\u8fd9\u4e2a\u5f88\u522b\u626d\u7684\u540d\u5b57\u6307\u5bf9\u8c61\u7684\u539f\u578b\uff0c\u5b83\u6ca1\u6b67\u4e49\uff0c\u548c\u4ee3\u7801\u4e00\u81f4\uff0c\u518d\u53d1\u660e\u4e00\u4e2a\u540d\u5b57\u53ea\u4f1a\u5236\u9020\u66f4\u591a\u7684\u6df7\u4e71\u3002<\/p>\n
              \u73b0\u5728\u6253\u5f00node shell\u3002<\/p>\n
              > let m = {}<\/span>\r\nundefined\r\n> m.__proto__<\/span>\r\n{}\r\n> m.__proto__ === m<\/span>\r\nfalse<\/code><\/pre>\n
              \u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u7a7a\u5bf9\u8c61\uff0c\u53eb\u505am\uff0c\u5b83\u7684\u539f\u578b\u4e5f\u662f\u4e00\u4e2a\u7a7a\u5bf9\u8c61\uff0c\u867d\u7136\u540c\u4e3a\u7a7a\u5bf9\u8c61\u4f46\u662f\u5b83\u4eec\u5e76\u975e\u4e00\u4e2a\u5bf9\u8c61\uff0c\u6240\u4ee5\u5e76\u4e0d\u76f8\u7b49\uff1b<\/p>\n
              > m.__proto__.__proto__\r\nnull<\/span>\r\n> let<\/span> op = m.__proto__\r\nundefined<\/span><\/code><\/pre>\n
              \u518d\u6cbf\u7740\u539f\u578b\u94fe\u5f80\u4e0a\u722c\uff0c\u770b\u770b\u539f\u578b\u7684\u539f\u578b\u662f\u8c01\uff1f\u6ca1\u4e86\u3002\u8fd9\u5f88\u597d\uff0c\u6211\u4eec\u77e5\u9053m\u7684\u539f\u578b\u6ca1\u6709\u539f\u578b\u4e86\uff0c\u6211\u4eec\u5148\u628am\u7684\u539f\u578b\u53eb\u505aop<\/code>\u3002<\/p>\n
              \u8c01\u6784\u9020\u7684op<\/code>\u5462\uff1f<\/p>\n
              > op.constructor\r\n[Function<\/span>: Object<\/span>]\r\n> op.constructor === Object<\/span>\r\ntrue<\/span><\/code><\/pre>\n
              op<\/code>\u7684\u6784\u9020\u51fd\u6570\u662f\u5168\u5c40\u90a3\u4e2a\u53ebObject<\/code>\u7684\u5bf9\u8c61\uff0c\u5b83\u672c\u8eab\u662f\u4e00\u4e2a\u51fd\u6570\uff1b\u4e0d\u8981\u628aObject<\/code>\u7406\u89e3\u6210namespace\uff0c\u6216\u8005\u628aObject<\/code>\u5bf9\u8c61\u4e0a\u7684\u65b9\u6cd5\u7406\u89e3\u4e3a\u201c\u9759\u6001\u65b9\u6cd5\u201d\uff0cObject<\/code>\u5c31\u662f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5b83\u88ab\u8d4b\u503c\u7ed9\u4e86\u5168\u5c40\u5bf9\u8c61\u7684Object<\/code>\u5c5e\u6027\uff0c\u867d\u7136\u5b83\u6709\u7279\u522b\u7684\u529f\u80fd\uff0c\u4f46\u662f\u8981\u628a\u5b83\u7406\u89e3\u6210\u6211\u4eec\u6b63\u5728\u6784\u9020\u7684\u5bf9\u8c61\u4e16\u754c\u4e2d\u7684\u4e00\u5458\uff0c\u5b83\u53ea\u662f\u5728\u5bf9\u8c61\u4e16\u754c\u5f00\u5929\u8f9f\u5730\u65f6\u88ab\u6784\u9020\u597d\u4e86\u800c\u5df2\uff0c\u800c\u6211\u4eec\u5728\u8ba8\u8bba\u7684\u5c31\u662f\u8fd9\u4e2a\u6784\u9020\u7684\u8fc7\u7a0b\u3002<\/p>\n
              \u6211\u4eec\u5df2\u7ecf\u56de\u7b54\u4e86op<\/code>\u7684\u6784\u9020\u51fd\u6570\u548c\u539f\u578b\u90fd\u662f\u8c01\u7684\u95ee\u9898\uff0c\u73b0\u5728\u7275\u626f\u51fa\u6765\u4e00\u4e2aObject<\/code>\uff0c\u6211\u4eec\u7ee7\u7eed\u68c0\u67e5\uff1b<\/p>\n
              > Object<\/span>.constructor\r\n[Function<\/span>: Function<\/span>]\r\n> Object<\/span>.constructor === Function<\/span>\r\ntrue<\/span>\r\n> Object<\/span>.__proto__\r\n[Function<\/span>]<\/code><\/pre>\n
              Object<\/code>\u7684\u6784\u9020\u51fd\u6570\u662f\u5168\u5c40\u5bf9\u8c61\u4e0a\u5c5e\u6027\u53ebFunction<\/code>\u7684\u5bf9\u8c61\uff1bObject<\/code>\u7684\u539f\u578b\u662f\u4e2a\u533f\u540d\u51fd\u6570\uff0c\u6309\u7167JavaScript\u5173\u4e8e\u6784\u9020\u51fd\u6570\u7684\u7ea6\u5b9a\uff0c\u5b83\u5e94\u8be5\u662f\u6784\u9020\u51fd\u6570\u7684prototype\u5c5e\u6027\uff1a<\/p>\n
              > Object<\/span>.__proto__ === Function<\/span>.prototype\r\ntrue<\/span>\r\n> let<\/span> fp = Function<\/span>.prototype\r\nundefined<\/span><\/code><\/pre>\n
              \u6211\u4eec\u7ed9\u8fd9\u4e2a\u5bf9\u8c61\u8d77\u4e2a\u540d\u5b57\uff0c\u53ebfp\u3002<\/p>\n
              > fp\r\n[Function<\/span>]\r\n> fp.constructor\r\n[Function<\/span>: Function<\/span>]\r\n> fp.constructor === Function<\/span>\r\ntrue<\/span>\r\n> fp.__proto__\r\n{}\r\n> fp.__proto__.__proto__\r\nnull<\/span>\r\n> fp.__proto__ === op\r\ntrue<\/span><\/code><\/pre>\n
              \u8fd9\u4e2afp<\/code>\u4e5f\u4e0d\u662f\u5f88\u9ebb\u70e6\uff0c\u6211\u4eec\u53d1\u73b0\u5b83\u662f\u4e00\u4e2a\u533f\u540d\u51fd\u6570\uff0c\u5b83\u7684\u6784\u9020\u51fd\u6570\u662fFunction<\/code>\uff0c\u800c\u5b83\u7684\u539f\u578b\u662fop<\/code>\u3002<\/p>\n
              \u6700\u540e\u6765\u770bFunction<\/code><\/p>\n
              > Function<\/span>.constructor\r\n[Function<\/span>: Function<\/span>]\r\n> Function<\/span>.__proto__\r\n[Function<\/span>]\r\n> Function<\/span>.__proto__ === fp\r\ntrue<\/span><\/code><\/pre>\n
              Function<\/code>\u81ea\u5df1\u800d\u4e86\u4e00\u4e2a\u8d56\u76ae\uff0c\u81ea\u5df1\u662f\u81ea\u5df1\u7684\u6784\u9020\u51fd\u6570\u6240\u4ee5\u89e3\u51b3\u4e86\u9e21\u548c\u86cb\u7684\u95ee\u9898\u3002Function<\/code>\u7684\u539f\u578b\u548cprototype\u5c5e\u6027\u6307\u5411\u4e86\u540c\u4e00\u4e2a\u5bf9\u8c61fp<\/code>\u3002<\/p>\n
              \u6240\u4ee5\u5230\u6b64\u4e3a\u6b62\u5462\uff0c\u6211\u4eec\u6252\u5f00\u4e86JavaScript\u4e16\u754c\u91cc\u6700\u539f\u59cb\u7684\u51e0\u4e2a\u5bf9\u8c61\uff0c\u4ed6\u4eec\u7684\u539f\u578b\u5173\u7cfb\u662f\uff1a<\/p>\n
              Function\u00a0and<\/span>\u00a0Object\u00a0-> fp -> op ->\u00a0null<\/code><\/pre>\n
              \u81f3\u4e8e\u6784\u9020\u51fd\u6570\u5462\uff0c\u56e0\u4e3aObject<\/code>\u662ffunction\uff0c\u5b83\u7684prototype\u662fop<\/code>\uff0c\u6309\u7167JavaScript\u7684\u7ea6\u5b9a\uff1afunction\u5bf9\u8c61\u7684prototype\u5c5e\u6027\u6307\u5411\u7684\u5bf9\u8c61\u5e94\u8be5\u628aconstructor<\/code>\u5c5e\u6027\u8bbe\u7f6e\u6210\u8be5function\u5bf9\u8c61\uff0c\u5373\uff1a<\/p>\n
              function<\/span>Object.prototype.constructor =\u00a0function<\/span>Object<\/code><\/pre>\n
              \u540c\u6837\u7684\u9053\u7406\uff0cFunction<\/code>\u7684prototype\u662ffp<\/code>\uff0cfp<\/code>\u7684constructor\u4e5f\u8981\u8bbe\u7f6e\u6210Function<\/code>\u3002<\/p>\n
              \u8fd9\u662fJavaScript\u91cc\u6700\u57fa\u7840\u7684\u56db\u4e2a\u5bf9\u8c61\uff1b\u5176\u4ed6\u7684\u4e00\u5207\u5bf9\u8c61\uff0c\u5728\u6a21\u578b\u548c\u6982\u5ff5\u4e2d\u90fd\u53ef\u4ee5\u6784\u9020\u51fa\u6765\uff1b<\/p>\n
              \u5982\u679c\u4f60\u5728\u5199\u4e00\u4e2a\u89e3\u91ca\u5668\uff0c\u4f60\u5728\u6700\u521d\u5c31\u8981\u628a\u8fd9\u4e9b\u4e1c\u897f\u521b\u9020\u51fa\u6765\uff0c\u7136\u540e\u521b\u9020\u4e00\u4e2aglobal\u5bf9\u8c61\uff08\u6216\u8005\u53ebcontext\uff09\uff0c\u5728\u8fd9\u4e2a\u5bf9\u8c61\u4e0a\u88c5\u4e0aObject<\/code>\u548cFunction<\/code>\uff0c\u8ba9\u4ed6\u4eec\u6210\u4e3a\u5168\u5c40\u5bf9\u8c61\uff0c\u81f3\u4e8eop<\/code>\u548cfp<\/code>\uff0c\u5c31\u8ba9\u4ed6\u4eec\u85cf\u5728\u91cc\u9762\u597d\u4e86\uff1b\u7f16\u7a0b\u4e2d\u6ca1\u6709\u9700\u8981\u7528\u5230\u4ed6\u4eec\u7684\u5730\u65b9\uff0c\u5982\u679c\u8981\u627e\u5230\u4ed6\u4eec\uff0c\u53ef\u4ee5\u7528Object.prototype<\/code>\u6216\u8005Function.prototype<\/code>\u6765\u627e\u5230\u3002<\/p>\n
              \u6240\u4ee5\u5230\u6b64\u4e3a\u6b62\uff0c\u6211\u4eec\u542f\u52a8\u4e86JavaScript\u7684\u5bf9\u8c61\u4e16\u754c\uff0c\u6709\u4e86Function<\/code>\u6211\u4eec\u5c31\u53ef\u4ee5\u6784\u9020\u51fd\u6570\u5bf9\u8c61\uff0c\u6709\u4e86\u51fd\u6570\u6211\u4eec\u5c31\u53ef\u4ee5\u6784\u9020\u66f4\u591a\u7684\u5bf9\u8c61\uff0c\u5982\u679c\u8bed\u8a00\u4e0a\u5141\u8bb8\uff08\u5373\u4e0d\u9700\u8981\u901a\u8fc7native code\u5b9e\u73b0\u7279\u6b8a\u529f\u80fd\uff09\uff0c\u6211\u4eec\u53ef\u4ee5\u7ee7\u7eed\u521b\u5efaObject.prototype<\/code>\u548cFunction.prototype<\/code>\u4e0a\u7684\u90a3\u4e9b\u51fd\u6570\u5bf9\u8c61\u5e76\u628a\u4ed6\u4eec\u88c5\u8f7d\u4e0a\u53bb\uff0c\u5728\u6982\u5ff5\u6a21\u578b\u4e0a\uff0c\u5185\u7f6e\u5bf9\u8c61\u6ca1\u6709\u4ec0\u4e48\u4e86\u4e0d\u8d77\uff0c\u4ed6\u4eec\u4ecd\u7136\u53ef\u4ee5\u88ab\u7406\u89e3\u6210\u88ab\u6784\u9020\u51fa\u6765\u7684\u5bf9\u8c61\uff1b<\/p>\n
              \u4e8b\u5b9e\u4e0a\u6240\u6709\u7684\u51fd\u6570\u4f5c\u7528\u57df\u548c\u51fd\u6570\u5185\u7684\u53d8\u91cf\u4e5f\u53ef\u4ee5\u88ab\u7406\u89e3\u6210\u5bf9\u8c61\u548c\u5b83\u7684\u5c5e\u6027\uff0c\u5728\u672c\u6587\u7684\u7ed3\u5c3e\u6211\u4eec\u4f1a\u8c08\u8fd9\u4e2a\u95ee\u9898\uff0c\u5f53\u7136\u5b83\u53ea\u662f\u6a21\u578b\u4e0a\u7684\uff1b<\/p>\n
              \u6211\u4eec\u9610\u8ff0\u4e86\u4e00\u5207\u7686\u5bf9\u8c61\u7684\u542b\u4e49\uff1b\u8fd9\u4e2a\u5bf9\u8c61\u6a21\u578b\u591f\u7b80\u5355\u5417\uff1f\u6211\u8ba4\u4e3a\u662f\u7684\uff1b\u5b83\u53ea\u6709\u5bf9\u8c61\uff0c\u51fd\u6570\uff0c\u539f\u578b\u4e09\u4e2a\u6982\u5ff5\u3002<\/p>\n
              \u4e00\u4e9b\u4eba\u8bf4JavaScript\u662fLisp\u7a7f\u4e86\u9a6c\u7532\uff0c\u4ece\u5bf9\u8c61\u6a21\u578b\u4e0a\u662f\u53ef\u4ee5\u6210\u7acb\u7684\uff1b\u56e0\u4e3aLisp\u91cc\u7684\u6570\u636e\u7ed3\u6784\u662fList\uff0c\u5b83\u662f\u4e00\u4e2a\u94fe\u8868\uff0c\u6bcf\u4e2a\u8282\u70b9\u6709\u4e24\u4e2aslot\uff0c\u4e00\u4e2a\u7528\u4e8e\u88c5\u8f7d\u503c\uff0c\u53e6\u4e00\u4e2a\u88c5\u8f7dnext\uff1b\u800cJavaScript\u5bf9\u8c61\u5176\u5b9e\u4e5f\u662f\u94fe\u8868\uff0c\u53ea\u4e0d\u8fc7\u5b83\u7ed9\u6bcf\u4e2a\u8282\u70b9\u589e\u52a0\u4e86\u4e00\u4e2a\u5b57\u7b26\u4e32\u6807\u7b7e\uff0c\u5373\u6240\u8c13\u7684property name\uff1b\u4f46\u5982\u679c\u4f60\u7528for ... in<\/code>\u8bed\u6cd5\u904d\u5386\u5bf9\u8c61\u5185\u90e8\u7684\u65f6\u5019\uff0c\u4f60\u4ecd\u7136\u80fd\u770b\u5230\u5185\u90e8\u7ed3\u6784\u7684\u987a\u5e8f\u662f\u7a33\u5b9a\u7684\uff0c\u4ecd\u7136\u662f\u94fe\u8868\uff1b<\/p>\n
              \u7ed9\u6bcf\u4e2a\u8282\u70b9\u52a0\u4e0alabel\u662fJavaScript\u8bbe\u8ba1\u4e0a\u975e\u5e38\u806a\u660e\u7684\u5730\u65b9\uff0c\u56e0\u4e3a\u5b83\u8ba9\u6587\u79d1\u751f\u4e5f\u53ef\u4ee5\u53c2\u4e0e\u5982\u706b\u5982\u837c\u7684\u7f16\u7a0b\u6d3b\u52a8\u3002<\/p><\/blockquote>\n
              \u4f46\u662f\u8fd9\u4e2a\u5bf9\u8c61\u6a21\u578b\u8bf4\u5b8c\u4e86\u597d\u50cf\u4ec0\u4e48\u4e5f\u6ca1\u6709\u8bf4\uff1f\u600e\u4e48JavaScript\u4e66\u4e0a\u8bb2\u7684\u90a3\u4e48\u591a\u6982\u5ff5\u90fd\u6ca1\u6709\u63d0\u5230\u5462\uff1f<\/p>\n
              \u8fd9\u662f\u95ee\u9898\u7684\u672c\u8d28\uff0c\u4e5f\u662f\u5f88\u591aJava\u8fc7\u6765\u7684\u7a0b\u5e8f\u5458\u5f88\u8d39\u52b2\u7684\u5730\u65b9\uff1bJavaScript\u5229\u7528\u4e0a\u8ff0\u7684\u8fd9\u4e2a\u975e\u5e38\u7b80\u5355\u7684\u5bf9\u8c61\u6a21\u578b\uff0c\u53bb\u6a21\u62df\uff0c\u6216\u8005\u8bf4\u5b9e\u73b0\uff0c\u5176\u4ed6\u6240\u6709\u7684\u7f16\u7a0b\u6982\u5ff5\u3002<\/p>\n
              JavaScript\u6700\u521d\u7684\u8bbe\u8ba1\u76ee\u7684\u53ea\u662f\u7528\u4e8e\u975e\u5e38\u7b80\u5355\u7684\u4e00\u4e9b\u5c0f\u529f\u80fd\uff0c\u9700\u8981\u53ef\u7f16\u7a0b\uff1b\u4e0d\u7ba1Brenden Eich\u662f\u5929\u624d\u3001\u62d9\u52a3\u3001\u8fd8\u662f\u5de7\u5408\u7684\u6a21\u4eff\u4e86Lisp\uff0c\u4ee5\u53caSmalltalk\u548cSelf\uff0c\u4ed6\u628a\u4e24\u4e2a\u975e\u5e38\u7b80\u5355\u4e14\u72ec\u4e00\u65e0\u4e8c\u7684\u4e8b\u60c5\u7ed3\u5408\u5728\u4e86\u4e00\u8d77\uff1a<\/p>\n
              Lisp\u662f\u03bb Calculus\u5728\u7f16\u7a0b\u8bed\u8a00\u4e0a\u7684\u76f4\u63a5\u5b9e\u73b0\uff1b\u539f\u578b\u91cd\u7528\u7684\u610f\u601d\u5219\u662f\uff1a<\/p>\n
              JavaScript\uff1a\u8ba9\u6211\u4eec\u6d88\u706d\u5fc5\u987b\u7528\u9759\u6001\u5b9a\u4e49\u7ea6\u5b9a\u52a8\u6001\u5bf9\u8c61\u7ed3\u6784\u7684\u505a\u6cd5\u5427\uff0c\u7f16\u7a0b\u541b\uff01\u4efb\u4f55\u9759\u6001\u80fd\u5b9a\u4e49\u51fa\u6765\u7684\u7ed3\u6784\uff0c\u6211\u4eec\u5728\u8fd0\u884c\u65f6\u4e5f\u53ef\u4ee5\u901a\u8fc7\u4e0d\u65ad\u7684\u590d\u5236\u83b7\u5f97\u554a\uff0c\u53ea\u662f\u4f1a\u6162\u4e00\u70b9\u70b9\u800c\u5df2\u3002\r\n\u7f16\u7a0b\u541b\uff1a\u5185\u5b58\u4e0d\u591f\u600e\u4e48\u529e\uff1f\r\nJavaScript\uff1a\u6211\u4eec\u6709\u539f\u578b\u554a\uff01\r\n\u7f16\u7a0b\u541b\uff1a\u597d\u5427\uff0c\u4f46\u4f60\u8981\u8bf7\u6211\u5403\u51b0\u6fc0\u51cc\u3002<\/code><\/pre>\n
              \u4e0d\u8c08\u5de5\u7a0b\u5b9e\u73b0\uff0c\u4ec5\u4ec5\u5728\u6982\u5ff5\u548c\u6a21\u578b\u4e0a\u7eb8\u4e0a\u8c08\u5175\u7684\u8bdd\uff0cJavaScript\u8bed\u8a00\u6a21\u578b\u4e4b\u7b80\u5355\uff0c\u662f\u5f88\u591a\u8001\u724c\u8bed\u8a00\u548c\u65b0\u5174\u811a\u672c\u8bed\u8a00\u90fd\u96be\u4ee5\u4f01\u53ca\u7684\uff0c\u5b83\u975e\u5e38\u7eaf\u7cb9\u3002<\/p>\n
               <\/p>\n
              \u51fd\u6570\u5bf9\u8c61\u4e0e\u6784\u9020\u51fd\u6570<\/h2>\n
              \u5728\u8c08\u6784\u9020\u51fd\u6570\u4e4b\u524d\u6211\u4eec\u5148\u770b\u4e00\u6bb5\u4ee3\u7801\uff1a<\/p>\n
              \/\/ \u6784\u9020\u5bf9\u8c61\u7684\u65b9\u5f0f1<\/span>\r\nconst<\/span> factory = (a, b) => {\r\n\r\n  return<\/span> {\r\n    a: a,\r\n    b: b,\r\n    sum: function<\/span>()<\/span> <\/span>{\r\n      return<\/span> this<\/span>.a + this<\/span>.b\r\n    }\r\n  }\r\n}<\/code><\/pre>\n
              return<\/code>\u8bed\u53e5\u540e\u9762\u8fd4\u56de\u7684\u5bf9\u8c61\uff0c\u88ab\u79f0\u4e3aex nihilo\u5bf9\u8c61\uff0c\u62c9\u4e01\u8bed\uff0cout of nothing\u7684\u610f\u601d\uff0c\u5373\u8fd9\u4e2a\u5bf9\u8c61\u6ca1\u6709\u7528\u4e00\u4e2a\u4e13\u95e8\u7684\u6784\u9020\u51fd\u6570\u53bb\u6784\u9020\uff0c\u800c\u662f\u7528\u90a3\u4e2a\u5168\u5c40\u7684Object<\/code>\u53bb\u6784\u9020\u4e86\u3002<\/p>\n
              \u5982\u679c\u4f60\u4ec5\u4ec5\u662f\u60f3\u521b\u5efa\u5177\u6709\u540c\u6837\u7ed3\u6784\u7684\u5bf9\u8c61\u5b9e\u73b0\u529f\u80fd\uff0c\u8fd9\u6837\u7684\u5de5\u5382\u65b9\u6cd5\u8db3\u591f\u4e86\u3002\u4f46\u662f\u8fd9\u6837\u5199\uff0c\u4e00\u65b9\u9762\uff0c\u91cd\u7528\u4e0d\u65b9\u4fbf\uff1b\u53e6\u4e00\u65b9\u9762\uff0c\u5982\u679c\u6211\u53ea\u6784\u9020\u51e0\u5341\u4e2a\u8fd9\u6837\u5bf9\u8c61\uff0c\u53ef\u80fd\u4e0d\u662f\u4ec0\u4e48\u5927\u95ee\u9898\uff0c\u4f46\u662f\u5982\u679c\u8981\u6784\u9020\u4e00\u767e\u4e07\u4e2a\u5462\uff1f\u6784\u9020\u4e00\u767e\u4e07\u4e2a\u4f1a\u5f15\u53d1\u4ec0\u4e48\u95ee\u9898\uff1f<\/p>\n
              \u8ba9\u6211\u4eec\u6765\u91cd\u65b0\u5f3a\u8c03\u5bf9\u8c61\u7684\u53e6\u4e00\u4e2a\u542b\u4e49\uff1a\u5bf9\u8c61\u662f\u6709\u751f\u547d\u5468\u671f\u7684\uff1b\u56e0\u4e3a\u51fd\u6570\u4e5f\u662f\u5bf9\u8c61\uff0c\u6240\u4ee5\u51fd\u6570\u5bf9\u8c61\u4e5f\u4e0d\u4f8b\u5916\uff1b\u8fd9\u4e00\u70b9\u662fJavaScript\u548cJava\u7684\u5de8\u5927\u5dee\u5f02\uff0c\u540e\u8005\u7684\u51fd\u6570\uff0c\u672c\u8d28\u4e0a\u662f\u9759\u6001\u5b58\u5728\u7684\uff0c\u6216\u8005\u8bf4\u548c\u7a0b\u5e8f\u7684\u751f\u547d\u5468\u671f\u4e00\u81f4\u3002\u4f46JavaScript\u91cc\u7684\u51fd\u6570\u5bf9\u8c61\u5e76\u975e\u5982\u6b64\u3002<\/p>\n
              \u524d\u9762\u7684sum\u5c5e\u6027\u5bf9\u5e94\u7684\u533f\u540d\u51fd\u6570\u5bf9\u8c61\uff0c\u5b83\u662f\u4ec0\u4e48\u65f6\u5019\u521b\u5efa\u5462\uff1f\u5728return<\/code>\u8bed\u53e5\u89e6\u53d1Object<\/code>\u6784\u9020\u7684\u65f6\u5019\u3002\u5982\u679c\u8981\u521b\u5efa\u4e00\u767e\u4e07\u4e2a\u5bf9\u8c61\u5462\uff1f\u8fd9\u4e2a\u51fd\u6570\u5bf9\u8c61\u4e5f\u4f1a\u88ab\u521b\u5efa\u4e00\u767e\u4e07\u6b21\uff0c\u4ea7\u751f\u4e00\u767e\u4e07\u4e2a\u51fd\u6570\u5bf9\u8c61\u5b9e\u4f8b\uff01<\/p>\n
              \u6362\u53e5\u8bdd\u8bf4\uff0c\u8fd9\u4e2a\u5de5\u5382\u65b9\u6cd5\u521b\u5efa\u7684\u4e00\u767e\u4e07\u4e2a\u5bf9\u8c61\u4e0d\u4ec5\u72b6\u6001\u5404\u6709\u4e00\u4efd\uff0c\u65b9\u6cd5\u4e5f\u5404\u6709\u4e00\u4efd\uff0c\u524d\u8005\u662f\u6211\u4eec\u7684\u610f\u56fe\uff0c\u4f46\u540e\u8005\u662f\u5de8\u5927\u7684\u8d1f\u62c5\uff0c\u867d\u7136\u8fd0\u884c\u73af\u5883\u4e0d\u4f1a\u771f\u7684\u8822\u5230\u53bb\u628a\u4ee3\u7801\u590d\u5236\u4e00\u767e\u4e07\u4efd\uff0c\u4f46\u51fd\u6570\u5bf9\u8c61\u786e\u5b9e\u5b58\u5728\u90a3\u4e48\u591a\uff0c\u5bf9\u8c61\u518d\u5c0f\u4e5f\u6709\u57fa\u7840\u7684\u5185\u5b58\u6d88\u8017\uff0c\u6570\u91cf\u591a\u65f6\u5185\u5b58\u6d88\u8017\u4e0d\u7ba1\u600e\u6837\u90fd\u4f1a\u53ef\u89c2\u7684\uff0c\u5982\u679c\u5bf9\u8c61\u5177\u6709\u4e0d\u53ea\u4e00\u4e2a\u51fd\u6570\uff0c\u90a3\u6d6a\u8d39\u5c31\u66f4\u53ef\u89c2\u4e86\u3002<\/p>\n
              \u8fd9\u662fJavaScript\u7684\u4e00\u5207\u7686\u5bf9\u8c61\uff0c\u5305\u62ec\u51fd\u6570\u4e5f\u662f\u5bf9\u8c61\u7684\u4ee3\u4ef7\u3002<\/p>\n
              \u9047\u5230\u8fd9\u6837\u7684\u95ee\u9898\u4e00\u822c\u6709\u4e24\u79cd\u529e\u6cd5\uff0c\u4e00\u79cd\u662f\u4fee\u6539\u673a\u5236\uff0c\u5373\u524d\u9762\u8bf4\u7684\u6a21\u578b\uff0c\u5f15\u5165\u65b0\u7684\u6982\u5ff5\uff1b\u53e6\u4e00\u79cd\u662f\u52a0\u5165\u7b56\u7565\uff0c\u5373\u5728\u8bed\u8a00\u5b9e\u73b0\u5c42\u9762\u589e\u52a0\u7ea6\u5b9a\uff0c\u4f46\u662f\u5229\u7528\u73b0\u6709\u673a\u5236\uff0c\u4e0d\u589e\u52a0\u6982\u5ff5\uff1b<\/p>\n
              JavaScript\u7684\u8bbe\u8ba1\u8005\u9009\u62e9\u4e86\u540e\u8005\uff0c\u8fd9\u4e5f\u662fJavaScript\u7684\u770b\u4f3c\u53e4\u602a\u7684\u6784\u9020\u51fd\u6570\u7684\u7531\u6765\u3002<\/p>\n
              \u8bbe\u8ba1\u8005\u8bf4\u53ef\u4ee5\u8fd9\u6837\u6765\u89e3\u51b3\u95ee\u9898\uff1a\u5982\u679c\u4e00\u4e2a\u51fd\u6570\u5bf9\u8c61\u7684\u76ee\u7684\u662f\u6784\u9020\u5176\u4ed6\u5bf9\u8c61\uff08\u5373\u6784\u9020\u51fd\u6570\uff09\uff0c\u5b83\u9700\u8981\u4e00\u4e2a\u5bf9\u8c61\u4f5c\u4e3a\u5b83\u7684\u5408\u4f5c\u8005\uff0c\u88c5\u8f7d\u6240\u6709\u88ab\u6784\u9020\u7684\u5bf9\u8c61\u7684\u516c\u7528\u51fd\u6570\uff0c\u4e24\u8005\u4e4b\u95f4\u7684\u8054\u7cfb\u8fd9\u6837\u5efa\u7acb\uff1a<\/p>\n
                \n
              1. \u6784\u9020\u51fd\u6570\u5bf9\u8c61\u9700\u8981\u5177\u6709\u4e00\u4e2a\u540d\u79f0\u4e3aprototype\u7684\u5c5e\u6027\uff0c\u6307\u5411\u516c\u7528\u51fd\u6570\u5bb9\u5668\u5bf9\u8c61\uff1b<\/li>\n
              2. \u516c\u7528\u51fd\u6570\u5bb9\u5668\u5bf9\u8c61\u9700\u8981\u5177\u6709\u4e00\u4e2a\u540d\u79f0\u4e3aconstructor\u7684\u5c5e\u6027\uff0c\u6307\u5411\u6784\u9020\u51fd\u6570\u5bf9\u8c61\uff1b<\/li>\n<\/ol>\n
                \u8fd9\u4e2a\u516c\u7528\u51fd\u6570\u5bb9\u5668\u5bf9\u8c61\u5728\u521b\u5efafunction\u5bf9\u8c61\u7684\u65f6\u5019\uff0c\u5982\u679c\u4e0d\u662farrow function\uff0c\u5b83\u81ea\u52a8\u5c31\u6709prototype\u5c5e\u6027\uff0c\u6307\u5411\u4e00\u4e2a\u7a7a\u5bf9\u8c61\uff1b\u5982\u679c\u662farrow\u51fd\u6570\uff0c\u6ca1\u6709\u8fd9\u4e2a\u5c5e\u6027\uff0carrow\u51fd\u6570\u4e5f\u4e0d\u53ef\u4ee5\u548cnew\u4e00\u8d77\u4f7f\u7528\uff1b<\/p><\/blockquote>\n
                > function<\/span> x<\/span>()<\/span> <\/span>{}\r\nundefined<\/span>\r\n> x.prototype\r\nx {}\r\n> const<\/span> y = () => {}\r\nundefined<\/span>\r\n> y.prototype\r\nundefined<\/span>\r\n><\/code><\/pre>\n
                \u5f53\u8c03\u7528\u6784\u9020\u51fd\u6570\u65f6\uff0c\u901a\u8fc7\u4f7f\u7528new<\/code>\u5173\u952e\u5b57\u660e\u786e\u8868\u793a\u8981\u6784\u9020\u5bf9\u8c61\uff0c\u8fd9\u65f6\u51fd\u6570\u7684\u5de5\u4f5c\u65b9\u5f0f\u53d8\u4e86\uff1a<\/p>\n
                  \n
                1. \u5148\u521b\u5efa\u4e00\u4e2a\u7a7a\u5bf9\u8c61N\uff0c\u628a\u5b83\u7684\u539f\u578b__proto__<\/code>\u8bbe\u7f6e\u6210\u8be5\u6784\u9020\u51fd\u6570\u5bf9\u8c61\u7684prototype\u5c5e\u6027\uff1b<\/li>\n
                2. \u628aN\u7684constructor<\/code>\u5c5e\u6027\u8bbe\u7f6e\u4e3a\u6784\u9020\u51fd\u6570\u5bf9\u8c61\uff1b<\/li>\n
                3. \u628aN bind\u6210\u6784\u9020\u51fd\u6570\u7684this\uff1b<\/li>\n
                4. \u8fd0\u884c\u6784\u9020\u51fd\u6570\uff1b<\/li>\n
                5. \u8fd4\u56de\u65b0\u5bf9\u8c61N\uff0c\u4e0d\u7ba1\u6784\u9020\u51fd\u6570\u8fd4\u56de\u4e86\u4ec0\u4e48\uff1b<\/li>\n<\/ol>\n
                  new<\/code>\u88ab\u5b9a\u4e49\u6210\u5173\u952e\u5b57\u662f\u4e3a\u4e86\u517c\u5bb9\u5176\u4ed6\u8bed\u8a00\u4f7f\u7528\u8005\u7684\u4e60\u60ef\uff0c\u5199\u6210\u51fd\u6570\u4e5f\u4e00\u6837\uff1a<\/p>\n
                  function<\/span> NEW<\/span>(constructor, ...args<\/span>)<\/span> <\/span>{\r\n  let obj = Object.create(constructor.prototype)\r\n  obj.construtor = constructor\r\n  constructor.bind(obj)(...args)\r\n  return<\/span> obj\r\n}<\/code><\/pre>\n
                  \u53e6\u4e00\u4e2a\u5173\u952e\u5b57instanceof<\/code>\uff0c\u5219\u53cd\u8fc7\u6765\u5de5\u4f5c\uff0c\u5982\u679c\u8868\u8fbe\u5f0f\u662fA instanceof B<\/code>\uff0c\u5982\u679c\u4e0d\u8003\u8651\u7ee7\u627f\u95ee\u9898\uff0c\u5c31\u53bb\u5224\u65adA.constructor === B<\/code>\u5373\u53ef\uff1b\u7ee7\u627f\u7684\u95ee\u9898\u540e\u9762\u8ba8\u8bba\u3002<\/p>\n
                  \u7406\u89e3\u4e86\u8fd9\u4e2a\u8fc7\u7a0b\u5c31\u4f1a\u660e\u767d\uff0cJavaScript\u91cc\u7684\u6784\u9020\u51fd\u6570\u95ee\u9898\uff0c\u5176\u5b9e\u5e76\u975e\u5728\u53d1\u660e\u6784\u9020\u51fd\u6570\u7684\u65b0\u8bed\u6cd5\uff0c\u800c\u662f\u4fdd\u6301\u8bed\u8a00\u6a21\u578b\u4e0d\u53d8\uff0c\u8ba9\u4ed6\u80fd\u591f\u6784\u9020\u5171\u4eab\u539f\u578b\u7684\u5bf9\u8c61\u7684\u4e00\u79cd\u65b9\u5f0f\u3002<\/p>\n
                  \u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u5728ES5\u8bed\u6cd5\u91cc\u770b\u5230\u7684\u6784\u9020\u51fd\u6570\u548c\u5b83\u7684\u539f\u578b\u7684\u4ee3\u7801\u662f\u7c7b\u4f3c\u8fd9\u6837\u7684\uff1a<\/p>\n
                  function<\/span> X<\/span>(name<\/span>) <\/span>{  this<\/span>.name = name }\r\n\r\nX.prototype.hello = function<\/span>() <\/span>{ console<\/span>.log('hello '<\/span> + this<\/span>.name) }\r\n\r\nvar<\/span> x1 = new<\/span> X('alice'<\/span>)\r\nx1.hello()\r\n\r\nvar<\/span> x2 = new<\/span> X('bob'<\/span>)\r\nx2.hello()\r\n<\/code><\/pre>\n
                  \u4f46\u5373\u4f7f\u9700\u8981\u8fd9\u6837\u505a\uff0c\u4e0a\u9762\u7684\u5199\u6cd5\u4e5f\u4e0d\u662f\u552f\u4e00\u7684\u5199\u6cd5\uff0c\u4e5f\u53ef\u4ee5\u8fd9\u6837\u76f4\u63a5\u5199\u5de5\u5382\u65b9\u6cd5\uff1a<\/p>\n
                  let<\/span> methods = {\r\n  hello: function<\/span>() <\/span>{\r\n    console<\/span>.log('hello'<\/span> + this<\/span>.name)\r\n  }\r\n}\r\n\r\nfunction<\/span> createX<\/span>(name<\/span>) <\/span>{\r\n  let<\/span> obj = Object<\/span>.create(Object<\/span>.assign({}, methods)) \/\/ \u4f7f\u7528Object.assign\u53ef\u4ee5merge\u591a\u4e2amethods<\/span>\r\n  obj.name = name\r\n  return<\/span> obj\r\n}\r\n<\/code><\/pre>\n
                  \u540c\u6837\u5b9e\u73b0\u6784\u9020\u5171\u4eab\u539f\u578b\u7684\u5bf9\u8c61\uff0c\u53ea\u662f\u8fd4\u56de\u7684\u5bf9\u8c61\u4e0d\u5177\u6709constructor\u5c5e\u6027\uff0cinstanceof<\/code>\u6ca1\u6cd5\u7528\uff0c\u4f46\u5982\u679c\u4f60\u4e0d\u9700\u8981instanceof<\/code>\uff0c\u4e5f\u4e0d\u9700\u8981\u8bbe\u8ba1\u591a\u5c42\u7684\u7ee7\u627f\uff0c\u8fd9\u662f\u53ef\u7528\u7684\u65b9\u6cd5\uff1b<\/p>\n
                  \u603b\u7ed3\u4e00\u4e0b\u5173\u4e8e\u6784\u9020\u51fd\u6570\u7684\u8fd9\u4e00\u8282\uff1b<\/p>\n
                  \u9996\u5148JavaScript\u5728\u5b9a\u4e49\u51fd\u6570\u65f6\uff0c\u5e76\u4e0d\u533a\u5206\u8fd9\u4e2a\u51fd\u6570\u662f\u4e0d\u662f\u6784\u9020\u51fd\u6570\uff0c\u662f\u5426\u662f\u6784\u9020\u51fd\u6570\u53d6\u51b3\u4e8e\u4f60\u662f\u5426\u4f7f\u7528new<\/code>\u8c03\u7528\uff1b<\/p>\n
                  \u5176\u6b21\uff0c\u5982\u679c\u4e00\u4e2a\u51fd\u6570\u662f\u6784\u9020\u51fd\u6570\uff0c\u5b83\u4e0d\u662f\u4e00\u4e2a\u4eba\u5728\u6218\u6597\uff0c\u5b83\u9700\u8981\u548c\u5b83\u7684prototype\u5c5e\u6027\u6307\u5411\u7684\u5bf9\u8c61\u5408\u4f5c\uff0c\u8be5\u5bf9\u8c61\u5c06\u662f\u6784\u9020\u7684\u5bf9\u8c61\u7684\u539f\u578b\uff0c\u8bf7\u628a\u4e24\u4e2a\u5bf9\u8c61\u800c\u4e0d\u662f\u4e00\u4e2a\u5bf9\u8c61\u5370\u5728\u8111\u5b50\u91cc\uff0c\u8fd9\u5bf9\u540e\u9762\u7406\u89e3\u7ee7\u627f\u975e\u5e38\u5173\u952e\uff1b<\/p>\n
                  \u7b2c\u4e09\uff0c\u548cJava\u91cc\u90a3\u79cd\u6570\u636e\u6210\u5458\u548c\u65b9\u6cd5\u6210\u5458\u5728\u5fc3\u7406\u4e0a\u4f4d\u4e8e\u4e00\u4e2a\u5bf9\u8c61\u5bb9\u5668\u5185\u4e0d\u540c\uff0cJavaScript\u7684\u5bf9\u8c61\u5728\u8bbe\u8ba1\u4e0a\u5c31\u8981\u7406\u89e3\u4e3a\u6570\u636e\uff08\u6216\u8005\u72b6\u6001\uff09\u5728\u81ea\u5df1\u8eab\u4e0a\uff0c\u65b9\u6cd5\uff08\u51fd\u6570\u5bf9\u8c61\uff09\u5728\u539f\u578b\u8eab\u4e0a\uff0c\u8fd9\u4ecd\u7136\u662f\u4e24\u4e2a\u5bf9\u8c61\u5728\u5408\u4f5c\uff0c\u8868\u73b0\u5f97\u8c61\u4e00\u4e2a\u5bf9\u8c61\u3002<\/p>\n
                   <\/p>\n
                  \u7ee7\u627f<\/h2>\n
                  JavaScript\u91cc\u7684\u7ee7\u627f\u4ecd\u7136\u4e0d\u662f\u8bed\u8a00\u7279\u6027\uff0c\u5728\u8fd9\u4e2a\u95ee\u9898\u4e0a\u6211\u4eec\u7ee7\u7eed\u6cbf\u7528\u524d\u9762\u7684\u601d\u8def\uff1a\u7528JavaScript\u7684\u539f\u578b\u91cd\u7528\u80fd\u529b\uff0c\u53bb\u6a21\u62df\uff0c\u6216\u8005\u8bf4\u5b9e\u73b0Java\u8bed\u8a00\u91cc\u7684\u7ee7\u627f\u5f62\u5f0f\u3002<\/p>\n
                  \u6211\u4eec\u5148\u8bf4\u601d\u8def\uff0c\u5047\u60f3\u6211\u4eec\u5c31\u662fBrenden Eich\u51e0\u5206\u949f\u3002<\/p>\n
                  \u5047\u5982\u6211\u4eec\u5df2\u7ecf\u7528\u6784\u9020\u5171\u4eab\u539f\u578b\u7684\u5bf9\u8c61\u7684\u601d\u8def\uff0c\u5199\u4e86\u4e00\u4e2a\u6784\u9020\u51fd\u6570BaseConstructor\uff0c\u5b83\u8d1f\u8d23\u521b\u5efa\u6bcf\u4e2a\u5bf9\u8c61\u7684\u6570\u636e\u6216\u72b6\u6001\u5c5e\u6027\uff0c\u4e5f\u6709\u4e86\u4e00\u4e2a\u5408\u4f5c\u8005BaseConstructor.prototype\uff0c\u5b83\u63d0\u4f9b\u4e86\u65b9\u6cd5BaseMethod1, …\uff1b\u73b0\u5728\u6211\u4eec\u9700\u8981\u62d3\u5c55\u5b83\uff0c\u8981\u589e\u52a0\u4e00\u90e8\u5206\u72b6\u6001\u6216\u8005\u5c5e\u6027\uff0c\u4e5f\u8981\u589e\u52a0\u4e00\u90e8\u5206\u65b9\u6cd5\uff0c\u6211\u4eec\u8be5\u600e\u4e48\u505a\uff1f<\/p>\n
                  \u9996\u5148\u6211\u4eec\u8003\u8651\u62d3\u5c55\u65b9\u6cd5\uff0c\u8fd9\u4e0d\u96be\uff0c\u5982\u679c\u6211\u4eec\u6784\u5efa\u4e00\u4e2a\u5bf9\u8c61\uff0c\u628a\u5b83\u7684\u539f\u578b\u8bbe\u7f6e\u4e3aBaseConstructor.prototype\uff0c\u7136\u540e\u5728\u65b0\u5bf9\u8c61\u91cc\u6dfb\u52a0\u65b9\u6cd5\u5373\u53ef\uff1b<\/p>\n
                  \u5176\u6b21\u6211\u4eec\u672a\u6765\u9700\u8981\u4f7f\u7528\u7684\u5bf9\u8c61\u5e94\u8be5\u90fd\u4ee5\u8be5\u5bf9\u8c61\u4e3a\u539f\u578b\uff0c\u56e0\u4e3a\u539f\u6709\u65b9\u6cd5\u548c\u6269\u5c55\u65b9\u6cd5\u90fd\u80fd\u901a\u8fc7\u5b83\u8bbf\u95ee\uff1b\u8fd9\u9884\u793a\u4e86\u6211\u4eec\u9700\u8981\u4e00\u4e2a\u65b0\u7684\u6784\u9020\u51fd\u6570\u4ee5\u8be5\u5bf9\u8c61\u4f5c\u4e3aprototype\u5c5e\u6027\uff1b\u903b\u8f91\u4e0a\u53ef\u4ee5\u662f\u8fd9\u6837\uff1a<\/p>\n
                  Base<\/span>     <-> Base.prototype\r\n  ^<\/span>            ^<\/span>\r\n  |            *\r\n  | call       * __proto__\r\n  |            *\r\nExtended <-> Extended.prototype<\/code><\/pre>\n
                  Extended\u51fd\u6570\u53ef\u4ee5\u521b\u5efaExtended.prototype<\/code>\u91cc\u6269\u5c55\u65b9\u6cd5\u6240\u9700\u8981\u7684\u72b6\u6001\u6216\u6570\u636e\u6210\u5458\uff1b\u4f46\u662fBase.prototype<\/code>\u91cc\u9700\u8981\u7684\u72b6\u6001\u6216\u8005\u6570\u636e\u6210\u5458\u9700\u8981Base<\/code>\u6765\u521b\u5efa\uff0c\u6211\u4eec\u80af\u5b9a\u4e0d\u5e0c\u671b\u628aBase<\/code>\u91cc\u7684\u4ee3\u7801\u590d\u5236\u4e00\u4efd\u5230Extended<\/code>\u5185\uff1b\u6211\u4eec\u9700\u8981\u8c03\u7528\u5b83\u6765\u521b\u5efa\u539f\u6709\u65b9\u6cd5\u6240\u9700\u7684\u72b6\u6001\u6216\u6570\u636e\u6210\u5458\u3002<\/p>\n
                  function<\/span> Base<\/span>(name<\/span>) <\/span>{ this<\/span>.name = name}\r\nBase.prototype.printName = function<\/span>() <\/span>{ console<\/span>.log(this<\/span>.name) }\r\n\r\nfunction<\/span> Extended<\/span>(name, age<\/span>) <\/span>{\r\n  Base.bind(this<\/span>)(name)\r\n  this<\/span>.age = age\r\n}\r\nExtended.prototype = Object<\/span>.create(Base.prototype)\r\nExtended.prototype.constructor = Extended\r\nExtended.prototype.printAge = function<\/span>() <\/span>{ console<\/span>.log(this<\/span>.age) }<\/code><\/pre>\n
                  \u8fd9\u91cctricky\u7684\u5730\u65b9\u6709\u51e0\u5904\uff1a<\/p>\n
                  \u7b2c\u4e00\uff0c\u5728Extended<\/code>\u51fd\u6570\u5185\uff0c\u5148\u628athis<\/code>\u00a0bind\u5230Base\u6784\u9020\u51fd\u6570\u4e0a\uff0c\u7136\u540e\u63d0\u4f9bname<\/code>\u53c2\u6570\u8c03\u7528\u5b83\uff0c\u8fd9\u6837this<\/code>\u5c31\u4f1a\u5177\u6709printName<\/code>\u6240\u9700\u7684name<\/code>\u5c5e\u6027\uff0c\u5b9e\u73b0\u7ed3\u6784\u7ee7\u627f\uff1b<\/p>\n
                  \u7b2c\u4e8c\uff0c\u6211\u4eec\u4f7f\u7528Object.create<\/code>\u65b9\u6cd5\u521b\u5efa\u4e86\u4e00\u4e2a\u4ee5Base.prototype<\/code>\u4e3a\u539f\u578b\u7684\u65b0\u5bf9\u8c61\uff0c\u628a\u5b83\u8bbe\u7f6e\u4e3aExtended.prototype<\/code>\uff0c\u5b9e\u73b0\u884c\u4e3a\u7ee7\u627f\uff1b<\/p>\n
                  \u7b2c\u4e09\uff0c\u628aExtended.prototype.constructor<\/code>\u8bbe\u7f6e\u4e3aExtended<\/code>\u6784\u9020\u51fd\u6570\uff0c\u8fd9\u6837\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528instanceof<\/code>\u8bed\u6cd5\u7cd6\uff1b<\/p>\n
                  \u6700\u540e\u6211\u4eec\u5728Extended<\/code>\u51fd\u6570\u5185\u521b\u5efa\u65b0\u7684\u72b6\u6001\u6216\u6570\u636e\u5c5e\u6027\uff0c\u6211\u4eec\u4e5f\u5728Extended.prototype<\/code>\u4e0a\u6dfb\u52a0\u65b0\u7684\u51fd\u6570\u65b9\u6cd5\uff1b<\/p>\n
                  \u6216\u8005\u6211\u4eec\u8bf4\u6211\u4eec\u627e\u5230\u4e86\u4e00\u79cd\u65b9\u5f0f\u65e2\u62d3\u5c55\u4e86\u6784\u9020\u51fd\u6570\u6784\u9020\u7684\u65b0\u5bf9\u8c61\u7684\u6570\u636e\u5c5e\u6027\uff0c\u4e5f\u62d3\u5c55\u4e86\u5b83\u7684\u51fd\u6570\u5c5e\u6027\uff0c\u6cbf\u7740\u4e24\u6761\u94fe\u5e73\u884c\u5b9e\u65bd\uff0c\u8fbe\u5230\u4e86\u6211\u4eec\u7684\u76ee\u7684\u3002<\/p>\n
                  \u5728JavaScript\u91cc\u4f7f\u7528\u8fd9\u79cd\u5728\u539f\u6709\u6784\u9020\u51fd\u6570\u53ca\u5176prototype\u5bf9\u8c61\u4e0a\u62d3\u5c55\u51fa\u4e00\u5bf9\u65b0\u7684\u6784\u9020\u51fd\u6570\u548cprototype\u5bf9\u8c61\u7684\u62d3\u5c55\u65b9\u5f0f\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a\u7ee7\u627f\u3002<\/p>\n
                  \u56e0\u4e3a\u5bf9\u8c61\u53ef\u4ee5\u91cd\u8f7d\u539f\u578b\u5bf9\u8c61\u7684\u5c5e\u6027\uff0c\u6240\u4ee5\u5728function.prototype<\/code>\u7684\u539f\u578b\u94fe\u4e0a\uff0c\u91cd\u8f7d\u51fd\u6570\u7684\u80fd\u529b\u4e5f\u5177\u6709\u4e86\u3002<\/p>\n
                   <\/p>\n
                  Class<\/h2>\n
                  JavaScript\u91cc\u6ca1\u6709type\u7cfb\u7edf\u610f\u4e49\u4e0a\u7684Class\u7684\u6982\u5ff5\u3002class<\/code>\u5173\u952e\u5b57\u4ecd\u7136\u662f\u8bed\u6cd5\u7cd6\u3002<\/p>\n
                  class<\/span> A<\/span> {\r\n\r\n  constructor<\/span> () { \/\/ \u8fd9\u662f\u6784\u9020\u51fd\u6570<\/span>\r\n  }\r\n\r\n  method<\/span>() { \/\/ \u8fd9\u662fA.prototype\u4e0a\u7684\u65b9\u6cd5<\/span>\r\n  }\r\n}<\/code><\/pre>\n
                  \u8fd9\u4e2a\u8bed\u6cd5\u6bd4\u524d\u9762\u5206\u5f00\u5199\u6784\u9020\u51fd\u6570\u548cprototype\u5bf9\u8c61\u7684\u5199\u6cd5\u8981\u7b80\u6d01\u5e72\u51c0\u5f88\u591a\uff0c\u4f46\u662f\u5e26\u7740Java\u7684Class\u7684\u6982\u5ff5\u8bd5\u56fe\u53bb\u7406\u89e3\u5b83\uff0c\u66f4\u5bb9\u6613\u88ab\u8bef\u5bfc\u4e86\u3002<\/p>\n
                  A<\/code>\u5728\u8fd9\u91cc\u4ecd\u7136\u662f\u51fd\u6570\u5bf9\u8c61\uff0c\u53ea\u4e0d\u8fc7\u5b83\u53ea\u80fd\u5f53\u6784\u9020\u51fd\u6570\u7528\uff0c\u5fc5\u987b\u7528new<\/code>\u8c03\u7528\uff1b\u5176\u4ed6\u8fd8\u6709\u4e00\u4e9b\u7ec6\u8282\u5dee\u5f02\uff0c\u4e0d\u8d58\u8ff0\u4e86\uff1b<\/p>\n
                  \u5982\u679c\u662f\u7ee7\u627f\u5462\uff1f<\/p>\n
                  class<\/span> Base<\/span> <\/span>{\r\n  constructor() {}\r\n  method1() {}\r\n}\r\n\r\nclass<\/span> Extended<\/span> extends<\/span> Base<\/span> <\/span>{\r\n  constructor() {\r\n    super<\/span>()\r\n    \/\/...<\/span>\r\n  }\r\n  method2() {}\r\n}<\/code><\/pre>\n
                  \u4e5f\u662f\u5927\u540c\u5c0f\u5f02\uff1bExtended<\/code>\u6784\u9020\u51fd\u6570\u5185\u9700\u8981\u8c03\u7528super()<\/code>\u6765\u5b9e\u73b0\u8c03\u7528Base<\/code>\u6784\u9020\u51fd\u6570\u6784\u9020\u5c5e\u6027\uff1b\u8fd9\u4e00\u53e5\u5fc5\u987b\u8c03\u7528\uff0c\u5426\u5219\u6ca1\u6709this<\/code>\uff0c\u8fd9\u662fclass\u8bed\u6cd5\u548c\u524d\u9762ES5\u8bed\u6cd5\u7684\u4e00\u4e2a\u5dee\u5f02\uff0c\u5728ES5\u8bed\u6cd5\u5185\uff0c\u65b0\u5bf9\u8c61\u662f\u5728\u8c03\u7528Extended<\/code>\u6784\u9020\u51fd\u6570\u65f6\u7acb\u523b\u521b\u5efa\u7684\uff0c\u5728class\u8bed\u6cd5\u4e2d\uff0c\u8fd9\u4e2a\u5bf9\u8c61\u662f\u6cbf\u7740super()<\/code>\u5411\u4e0a\u722c\u5230\u6700\u9876\u5c42\u6784\u9020\u51fd\u6570\u624d\u521b\u5efa\u7684\uff0c\u6240\u4ee5\u5982\u679c\u4e0d\u8c03\u7528super<\/code>\u5c31\u6ca1this<\/code>\u4e86\u3002<\/p>\n
                  \u5b9e\u9645\u4e0a\u5728JavaScript\u91cc\u7684\u7ee7\u627f\uff0c\u5e94\u8be5\u5f53\u4f5c\u4e00\u79cdPattern\u6765\u7406\u89e3\uff0c\u5373\uff1a\u4f7f\u7528\u6784\u9020\u51fd\u6570\u548c\u5b83\u7684prototype\u5c5e\u6027\u5bf9\u8c61\u5408\u4f5c\u6765\u6a21\u62df\u4f20\u7edfOO\u8bed\u8a00\u91cc\u7684\u7ee7\u627f\u5f62\u5f0f\uff0c\u628a\u5b83\u53eb\u505aInheritance Pattern<\/code>\u6070\u5f53\u7684\u591a\u3002<\/p>\n
                   <\/p>\n
                  \u51fd\u6570\u4f5c\u7528\u57df<\/h2>\n
                  \u524d\u9762\u6211\u4eec\u66fe\u5192\u5145\u4e0a\u5e1d\uff0c\u5047\u60f3\u4e00\u4e2aJavaScript\u7a0b\u5e8f\u542f\u52a8\u540e\uff0c\u5982\u4f55\u4ece\u96f6\u5f00\u59cb\u6784\u9020\u6574\u4e2a\u5bf9\u8c61\u4e16\u754c\uff1b\u73b0\u5728\u6211\u4eec\u5f97\u5bf8\u8fdb\u5c3a\uff0c\u5192\u5145\u4e0a\u5e1d\u4ed6\u5988\uff0c\u8003\u8651\u7ad9\u5728\u6267\u884c\u5668\u7684\u89c6\u89d2\u4e0a\uff0c\u5982\u679c\u62ff\u5230\u4e00\u4efdJavaScript\u811a\u672c\u5982\u4f55\u6267\u884c\uff1b<\/p>\n
                  \u5047\u5b9a\u6211\u4eec\u5df2\u7ecf\u4f7f\u7528\u4e86\u5e95\u5c42\u8bed\u8a00\uff0c\u4f8b\u5982C\/C++\uff0c\u5b9e\u73b0\u4e86JavaScript\u7684\u5bf9\u8c61\u6a21\u578b\uff0c\u5373\u5f88\u5bb9\u6613\u521b\u5efa\u5bf9\u8c61\uff0c\u7ef4\u62a4\u539f\u578b\u94fe\u3002<\/p>\n
                  \u6211\u4eec\u5148\u521b\u5efa\u4e00\u4e2a\u7a7a\u5bf9\u8c61\uff0c\u628a\u5b83\u79f0\u4e3aglobal\uff0c\u5148\u628a\u6807\u51c6\u7684\u5185\u7f6e\u5bf9\u8c61\u90fd\u4f5c\u4e3a\u5168\u5c40\u53d8\u91cf\u540d\u79f0\u88c5\u8f7d\u8fdb\u53bb\uff1b\u7136\u540e\u5f00\u59cb\u8fd0\u884c\u3002<\/p>\n
                  JavaScript\u662f\u4e2a\u5355\u7ebf\u7a0b\u6a21\u578b\uff0c\u6240\u4ee5\u5047\u5b9a\u6211\u4eec\u7528\u6808\u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\u8ba1\u7b97\uff1b\u57fa\u672c\u64cd\u4f5c\u7b26\u548c\u8868\u8fbe\u5f0f\u7684\u6808\u8ba1\u7b97\u5c31\u4e0d\u591a\u8bf4\u4e86\uff0c\u6211\u4eec\u53ea\u8bf4\u9047\u5230\u51fd\u6570\u600e\u4e48\u529e\u3002<\/p>\n
                  \u4e00\u822c\u6765\u8bf4\u9047\u5230\u51fd\u6570\u5e94\u8be5\u7ea6\u5b9a\u5728\u6808\u4e0a\u5904\u7406\u53c2\u6570\u548c\u8fd4\u56de\u503c\u7684\u65b9\u5f0f\uff0c\u4f46\u8fd9\u4e2a\u65e0\u5173\u7d27\u8981\uff0c\u6709\u5173\u7d27\u8981\u7684\u95ee\u9898\u662f\u6211\u4eec\u9700\u8981\u628a\u4f20\u7edf\u7684Function Frame\u7684\u6982\u5ff5\uff0c\u5373\u5bf9\u4e00\u4e2a\u51fd\u6570\u5728\u6808\u4e0a\u5206\u914d\u5c40\u90e8\u53d8\u91cf\u7684\u6982\u5ff5\uff0c\u6362\u4e2a\u601d\u7ef4\uff0c\u6211\u4eec\u4e0d\u7528Function Frame\uff0c\u800c\u662f\u521b\u5efa\u4e00\u4e2a\u7a7a\u5bf9\u8c61\u6765\u8868\u5f0f\u4e00\u4e2aFunction Frame\uff0c\u6211\u4eec\u4e00\u884c\u4e00\u884c\u7684\u8bfb\u5165\u4ee3\u7801\uff0c\u9047\u5230\u5c40\u90e8\u53d8\u91cf\u58f0\u660e\u5c31\u5728\u8fd9\u4e2a\u5bf9\u8c61\u4e0a\u88c5\u4e0a\u4e00\u4e2a\u5c5e\u6027\uff0c\u9047\u5230\u4fee\u6539\u5c40\u90e8\u53d8\u91cf\u7684\u65f6\u5019\u5c31\u7ed9\u5b83\u8d4b\u503c\uff1b<\/p>\n
                  \u5982\u679c\u8fd9\u6837\u505a\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u628aFunction Scope(\u4e00\u822c\u8bf4Function Scope\u6307\u7684\u662f\u4ee3\u7801\u5c42\u9762\u7684Lexical Scope\uff0c\u8fd9\u91cc\u6211\u4eec\u628aFunction Scope\u548cFunction Frame\u6df7\u7528)\u4f5c\u4e3a\u539f\u578b\u94fe\u4e32\u8d77\u6765\uff0c\u8bcd\u6cd5\u57df\u4e2d\u5916\u56f4\u7684Function Scope\u662f\u539f\u578b\uff0c\u5185\u90e8\u7684Function Scope\u662f\u5bf9\u8c61\uff1b\u8fd9\u6837Function Scope\u7684\u5f15\u7528\u53ef\u80fd\u51fa\u73b0\u5728\u6808\u4e0a\uff0c\u4f46\u5b83\u672c\u8eab\u5e76\u975e\u5206\u914d\u5728\u6808\u4e0a\uff1bFunction Scope\u5bf9\u8c61\u7684\u521b\u5efa\u662f\u5728\u8c03\u7528\u51fd\u6570\u65f6\uff0c\u5b83\u7684\u9500\u6bc1\u6211\u4eec\u53ef\u4ee5\u6682\u65f6\u6307\u671b\u5783\u573e\u56de\u6536\u5668\uff0c\u53ef\u56de\u6536\u7684\u65f6\u95f4\u662f\u8be5\u51fd\u6570\u5df2\u7ecf\u5b8c\u6210\u6267\u884c\u4e14\u6ca1\u6709\u5176\u4ed6Function Scope\u5f15\u7528\u8be5Scope\uff1b<\/p>\n
                  \u5982\u679c\u4f60\u4ed4\u7ec6\u89c2\u5bdf\u5728Function Scope\u6784\u6210\u7684\u94fe\u4e0a\u67e5\u627e\u53d8\u91cf\u540d(Identifier)\u7684\u65f6\u5019\uff0c\u5176\u903b\u8f91\u548c\u5728\u539f\u578b\u94fe\u4e0a\u67e5\u627e\u5c5e\u6027\u7684\u65b9\u5f0f\u4e00\u6a21\u4e00\u6837\uff1b\u7528\u8fd9\u6837\u7684\u65b9\u5f0f\u4e5f\u53ef\u4ee5\u51c6\u786e\u627e\u5230\u95ed\u5305\u53d8\u91cf\uff0c\u552f\u4e00\u7684\u533a\u522b\u662f\u8fd9\u91cc\u9700\u8981\u5c0f\u5c0f\u7684\u4fee\u6539\u4e00\u4e0b\u539f\u578b\u94fe\u7684\u7ea6\u5b9a\uff0c\u539f\u578b\u4e0a\u7684\u5c5e\u6027\u53ef\u4ee5\u76f4\u63a5\u4fee\u6539\uff0c\u56e0\u4e3a\u95ed\u5305\u53d8\u91cf\u662f\u53ef\u4ee5\u8d4b\u503c\u7684\uff1b<\/p>\n
                  \u8fd9\u5c31\u662f\u524d\u9762\u6211\u4eec\u8bf4Function Scope\u4e5f\u53ef\u4ee5\u5f53\u4f5c\u662f\u5bf9\u8c61\u5904\u7406\u7684\u539f\u56e0\u3002<\/p>\n
                  \u4f60\u53ef\u4ee5\u60f3\u8c61\u51fa\u6765\u8fd9\u4e2a\u89e3\u91ca\u5668\u53ef\u4ee5\u5199\u5f97\u591a\u5c0f\u548c\u591a\u7b80\u5355\uff0c\u800c\u4e14\u5982\u679c\u6ca1\u6709hoisting\uff0c\u5b83\u53ef\u4ee5\u5728\u6e90\u6587\u4ef6\u8fd8\u6ca1\u4e0b\u8f7d\u5b8c\u5c31\u5f00\u59cb\u6295\u5165\u8fd0\u884c\uff0c\u800c\u4e0d\u662f\u4e00\u5f00\u59cb\u5c31\u628a\u6574\u4e2a\u8bed\u6cd5\u6811\u90fd\u89e3\u6790\u51fa\u6765\uff1b<\/p>\n
                  \u5982\u679c\u4f60\u95ee\u4e3a\u4ec0\u4e48\u65e9\u671f\u7684JavaScript\u7684var<\/code>\u6ca1\u6709block scope\u652f\u6301\uff0c\u56e0\u4e3ablock scope\u6309\u7167\u8fd9\u79cd\u601d\u8def\u6765\u8bf4\uff0c\u9700\u8981\u4e3ablock scope\u5355\u72ec\u521b\u5efa\u5bf9\u8c61\u3002<\/p>\n
                  \u6240\u4ee5\u5728\u8fd9\u4e2a\u8ba8\u8bba\u91cc\uff0c\u4f60\u80fd\u5bf9JavaScript\u6700\u521d\u5471\u5471\u5760\u5730\u65f6\u7684\u4e00\u4e9b\u5c0f\u60f3\u6cd5\u83b7\u5f97\u4e00\u4e9b\u611f\u53d7\uff1b\u5b83\u4ece\u4e00\u5f00\u59cb\u53ea\u60f3\u7528\u4e00\u4e2a\u4ee4\u4eba\u9707\u60ca\u7684\u7b80\u5355\u7684\u65b9\u6cd5\u505a\u51e0\u4ef6\u7b80\u5355\u7684\u5c0f\u4e8b\u60c5\uff0c\u6bd4\u5982\u8d5a\u4e00\u4e2a\u4ebf\uff0c\u4f46\u8fd9\u5e76\u4e0d\u8bf4\u660e\u5b83\u65e0\u80fd\uff0c\u76f8\u53cd\uff0c\u5728\u6570\u5b66\u548c\u7f16\u7a0b\u7684\u4e16\u754c\u91cc\uff0c\u8d8a\u662f\u7b80\u5355\u7684\u4e8b\u60c5\u8d8a\u6709\u65e0\u7a77\u65e0\u5c3d\u7684\u80fd\u91cf\u3002<\/p>\n
                  \u5199\u5230\u8fd9\u91cc\uff0c\u6211\u60f3\u6211\u8bf4\u5b8c\u4e86\u81ea\u5df1\u5bf9JavaScript\u7684\u4e00\u5207\u7686\u5bf9\u8c61\u7684\u8ba4\u77e5\uff0c\u6b22\u8fce\u63a2\u8ba8\u3002<\/p>\n
                  \u6700\u540e\u9e23\u8c22\u5c11\u5987\u767d\u6d01\u613f\u610f\u51fa\u73b0\u5728\u672c\u6587\u9898\u76ee\u4e2d\u3002<\/p>\n<\/div>\n<\/div>\n
                  \n
                  \u539f\u6587\u5730\u5740\uff1ahttp:\/\/write.blog.csdn.net\/postedit\/56668067<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
                  \u6211\u4e0d\u786e\u5b9aJavaScript\u8bed\u8a00\u662f\u5426\u5e94\u8be5\u88ab\u79f0\u4e3aObject-Oriented\uff0c\u56e0\u4e3aObject Oriente […]<\/p>\n","protected":false},"author":1,"featured_media":180,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[10],"tags":[19],"_links":{"self":[{"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/posts\/118"}],"collection":[{"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=118"}],"version-history":[{"count":3,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/posts\/118\/revisions"}],"predecessor-version":[{"id":184,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/posts\/118\/revisions\/184"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/media\/180"}],"wp:attachment":[{"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=118"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=118"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}