{"id":127,"date":"2016-08-19T14:24:12","date_gmt":"2016-08-19T06:24:12","guid":{"rendered":"http:\/\/blog.xrhoujie.com\/?p=127"},"modified":"2017-07-31T17:14:24","modified_gmt":"2017-07-31T09:14:24","slug":"modernizr-js%ef%bc%8c%e8%ae%a9css%e5%85%bc%e5%ae%b9%e6%80%a7%e8%b7%9f%e5%8e%86%e5%8f%b2%e8%af%b4%e5%86%8d%e8%a7%81%ef%bc%81%e4%b8%8a%e7%af%87","status":"publish","type":"post","link":"http:\/\/blog.xrhoujie.com\/?p=127","title":{"rendered":"Modernizr.js\uff0c~\u8ba9css\u517c\u5bb9\u6027\u8ddf\u5386\u53f2\u8bf4\u518d\u89c1\uff01(\u4e0a\u7bc7)"},"content":{"rendered":"
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\n
\n

\u4ec0\u4e48\u662fModernizr\uff1f<\/strong><\/p>\n

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Modernizr \u7b80\u5355\u6613\u7528\uff0c\u4f46\u4e0d\u662f\u4e07\u80fd\u7684\u3002 \u6210\u529f\u4f7f\u7528 Modernizr \u5f88\u5927\u7a0b\u5ea6\u4e0a\u53d6\u51b3\u4e8e\u4f60\u7684 CSS \u548c JavaScript \u6280\u80fd\u3002<\/strong><\/p>\n

\u4f7f\u7528HTML 5\u548cCSS 3\u7684\u4e3b\u8981\u95ee\u9898\u4e0d\u662f\u666e\u53ca\u7a0b\u5ea6\u548c\u6d4f\u89c8\u5668\u4e4b\u95f4\u7684\u5dee\u5f02\uff0c\u800c\u5728\u4e8e\u9996\u5148\u4e86\u89e3\u8fd9\u4e9b\u5dee\u5f02\u662f\u4ec0\u4e48\u3002\u4e00\u65e6\u641e\u6e05\u695a\uff0c\u5f00\u53d1\u4eba\u5458\u5c31\u80fd\u591f\u91c7\u7528\u4f18\u96c5\u964d\u7ea7(graceful degradation)\u6280\u672f\u89e3\u51b3\u8fd9\u4e9b\u5c40\u9650\u6027\u3002\u4e3a\u6b64\uff0c\u8bb8\u591a\u5f00\u53d1\u4eba\u5458\u6c42\u52a9\u4e8e\u5f00\u6e90\u9879\u76eeModernizr\u3002<\/p>\n

 <\/p>\n

 <\/p>\n

Modernizr\u7684\u539f\u7406<\/strong><\/p>\n

Modernizr \u4f7f\u7528 JavaScript \u68c0\u6d4b\u6d4f\u89c8\u5668\u6240\u652f\u6301\u7684\u529f\u80fd\uff0c\u4f46\u662f\uff0c\u5b83\u5e76\u4e0d\u662f\u4f7f\u7528 JavaScript \u52a8\u6001\u5730\u52a0\u8f7d\u4e0d\u540c\u7684\u6837\u5f0f\u8868\uff0c\u800c\u662f\u4f7f\u7528\u975e\u5e38\u7b80\u5355\u7684\u6280\u672f\u5c06\u7c7b\u6dfb\u52a0\u5230\u9875\u9762\u7684\u6807\u7b7e\u3002\u7136\u540e\u4f5c\u4e3a\u8bbe\u8ba1\u8005\u7531\u4f60\u51b3\u5b9a\u4f7f\u7528 CSS \u5c42\u53e0\u4e3a\u76ee\u6807\u5143\u7d20\u63d0\u4f9b\u5408\u9002\u7684\u6837\u5f0f\u3002<\/p>\n

\u4f8b\u5982\uff0c\u5982\u679c\u9875\u9762\u652f\u6301\u00a0box-shadow\u00a0\u5c5e\u6027\uff0c\u90a3\u4e48 Modernizr \u4f1a\u6dfb\u52a0\u00a0boxshadow\u00a0\u7c7b\u3002\u5982\u679c\u4e0d\u652f\u6301\uff0c\u90a3\u4e48\u5b83\u7528\u00a0no-boxshadow\u00a0\u7c7b\u4f5c\u4e3a\u66ff\u4ee3\u8fdb\u884c\u6dfb\u52a0\u3002<\/p>\n

\u7531\u4e8e\u6d4f\u89c8\u5668\u5ffd\u7565\u5b83\u4eec\u65e0\u6cd5\u8bc6\u522b\u7684 CSS \u5c5e\u6027\uff0c\u56e0\u6b64\u4f60\u53ef\u4ee5\u653e\u5fc3\u5730\u6309\u7167\u4f60\u7684\u57fa\u672c\u6837\u5f0f\u89c4\u5219\u4f7f\u7528\u00a0box-shadow\u00a0\u5c5e\u6027\uff0c\u7136\u800c\u9700\u8981\u6309\u7167\u4e0b\u9762\u7684\u683c\u5f0f\u4e3a\u65e7\u7248\u672c\u7684\u6d4f\u89c8\u5668\u6dfb\u52a0\u5355\u72ec\u7684\u00a0descendant selector\u00a0<\/a>\uff1a<\/p>\n

.no-boxshadow img { \/* styles for browsers that don’t support box-shadow *\/ }<\/p>\n

\u53ea\u6709\u4e0d\u652f\u6301\u00a0box-shadow\u00a0\u7684\u6d4f\u89c8\u5668\u624d\u4f1a\u6709\u00a0no-boxshadow\u00a0\u7c7b\uff0c\u56e0\u6b64\u5176\u5b83\u7684\u6d4f\u89c8\u5668\u4e0d\u4f1a\u5e94\u7528\u8fd9\u4e2a\u6837\u5f0f\u89c4\u5219\u3002<\/p>\n

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<script<\/span> src<\/span>=<\/span>\"modernizr-custom.js\"<\/span><\/span>><\/span><\/script<\/span>><\/span><\/span><\/code><\/pre>\n
\u9996\u5148\u4f60\u8981\u6709\u4e00\u4e2a\u6846\u67b6\uff0c\u53ef\u4ee5\u5728github\u4e0a\u8fdb\u884c\u4e0b\u8f7d<\/p>\n
https:\/\/github.com\/Modernizr\/Modernizr\/downloads \uff0c\u8981\u4e0b\u8f7d\u6700\u65b0\u7684\u7248\u672c\u54e6\uff01<\/p>\n
\u597d\u63a5\u4e0b\u6765\u6211\u4eec\u5f00\u59cb\u8fdb\u884c\u6d4b\u8bd5\uff0c\u65e2\u7136\u6211\u5f15\u5165\u4e86\u6846\u67b6\uff0c\u90a3\u6211\u5e94\u8be5\u5982\u4f55\u770b\u5230\u662f\u5426\u6210\u529f\u5462\uff0c\u63a5\u4e0b\u6765\u8bf7\u5f80\u4e0b\u770b<\/p>\n
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\u5927\u5bb6\u8bf7\u6ce8\u610f\u8fd9\u91cc\u9762\u7684<\/p>\n
 <html lang=\"en\"<\/span> class<\/span>-<\/span>=\"no-js\"<\/span>><\/code><\/pre>\n
\u8fd9\u91cc\u9762\u7684<\/p>\n
 <html<\/span> class<\/span>-<\/span><\/span>=\"no-js\"<\/span>><\/span><\/code><\/pre>\n
\u8fd9\u4e2a\u4e1c\u897f\u662f \u5f53Modernizr\u8fd0\u884c\u7684\u65f6\u5019\uff0c\u5b83\u4f1a\u628a\u8fd9\u4e2a\u201cno-js\u201d\u7684\u7c7b\u53d8\u4e3a\u201cjs\u201d\u6765\u4f7f\u4f60\u77e5\u9053\u5b83\u5df2\u7ecf\u8fd0\u884c\u3002Modernizr\u5e76\u4e0d\u4ec5\u4ec5\u53ea\u505a\u8fd9\u4e00\u4ef6\u4e8b\u60c5\uff0c\u5b83\u8fd8\u4f1a\u4e3a \u6240\u6709\u5b83\u68c0\u6d4b\u8fc7\u7684\u7279\u6027\u6dfb\u52a0class\u7c7b\uff0c\u5982\u679c\u6d4f\u89c8\u5668\u4e0d\u652f\u6301\u67d0\u4e2a\u7279\u6027\uff0c\u5b83\u5c31\u4e3a\u8be5\u7279\u6027\u5bf9\u5e94\u7684\u7c7b\u540d\u52a0\u4e0a\u201cno-\u201d\u7684\u524d\u7f00\u3002\u6240\u4ee5\uff0c\u4f60\u7684<html>\u5143\u7d20 \u53ef\u80fd\u4f1a\u53d8\u5f97\u770b\u8d77\u6765\u50cf\u4e0b\u9762\u8fd9\u4e2a\u6837\u5b50\uff1a<\/p>\n
<html<\/span> class<\/span>=\"js canvas canvastext no-geolocation rgba hsla   \r\nmultiplebgs borderimage borderradius boxshadow opacity cssanimations csscolumns   \r\ncssgradients cssreflections csstransforms csstransforms3d csstransitions video   \r\naudio localstorage sessionstorage webworkers applicationcache fontface\"<\/span>><\/span><\/code><\/pre>\n
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