{"id":938,"date":"2022-03-12T14:19:57","date_gmt":"2022-03-12T06:19:57","guid":{"rendered":"http:\/\/blog.xrhoujie.com\/?p=938"},"modified":"2022-03-16T15:14:31","modified_gmt":"2022-03-16T07:14:31","slug":"vue%e7%94%9f%e5%91%bd%e5%91%a8%e6%9c%9f%e7%af%87-watch%e5%ad%a6%e4%b9%a0%e7%ac%94%e8%ae%b0","status":"publish","type":"post","link":"http:\/\/blog.xrhoujie.com\/?p=938","title":{"rendered":"Vue\u751f\u547d\u5468\u671f\u7bc7-watch(\u5b66\u4e60\u7b14\u8bb0)"},"content":{"rendered":"\n<p>\u76d1\u89c6\u5c5e\u6027watch\uff1a<\/p>\n\n\n\n<p> 1.\u5f53\u88ab\u76d1\u89c6\u7684\u5c5e\u6027\u53d8\u5316\u65f6, \u56de\u8c03\u51fd\u6570\u81ea\u52a8\u8c03\u7528, \u8fdb\u884c\u76f8\u5173\u64cd\u4f5c<\/p>\n\n\n\n<p> 2.\u76d1\u89c6\u7684\u5c5e\u6027\u5fc5\u987b\u5b58\u5728\uff0c\u624d\u80fd\u8fdb\u884c\u76d1\u89c6\uff01\uff01 <\/p>\n\n\n\n<p>3.\u76d1\u89c6\u7684\u4e24\u79cd\u5199\u6cd5\uff1a <\/p>\n\n\n\n<p>(1).new Vue\u65f6\u4f20\u5165watch\u914d\u7f6e<\/p>\n\n\n\n<p> (2).\u901a\u8fc7vm.$watch\u76d1\u89c6<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>watch:{\n                \/\/\u6b63\u5e38\u5199\u6cd5\n                \/* isHot:{\n                    \/\/ immediate:true, \/\/\u521d\u59cb\u5316\u65f6\u8ba9handler\u8c03\u7528\u4e00\u4e0b\n                    \/\/ deep:true,\/\/\u6df1\u5ea6\u76d1\u89c6\n                    handler(newValue,oldValue){\n                        console.log('isHot\u88ab\u4fee\u6539\u4e86',newValue,oldValue)\n                    }\n                }, *\/\n                \/\/\u7b80\u5199\n                \/* isHot(newValue,oldValue){\n                    console.log('isHot\u88ab\u4fee\u6539\u4e86',newValue,oldValue,this)\n                } *\/\n            }\n\n\n\n\/\/\u6b63\u5e38\u5199\u6cd5\n        \/* vm.$watch('isHot',{\n            immediate:true, \/\/\u521d\u59cb\u5316\u65f6\u8ba9handler\u8c03\u7528\u4e00\u4e0b\n            deep:true,\/\/\u6df1\u5ea6\u76d1\u89c6\n            handler(newValue,oldValue){\n                console.log('isHot\u88ab\u4fee\u6539\u4e86',newValue,oldValue)\n            }\n        }) *\/\n\n        \/\/\u7b80\u5199\n        \/* vm.$watch('isHot',(newValue,oldValue)=>{\n            console.log('isHot\u88ab\u4fee\u6539\u4e86',newValue,oldValue,this)\n        }) *\/<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u76d1\u89c6\u5c5e\u6027watch\uff1a 1.\u5f53\u88ab\u76d1\u89c6\u7684\u5c5e\u6027\u53d8\u5316\u65f6, \u56de\u8c03\u51fd\u6570\u81ea\u52a8\u8c03\u7528, \u8fdb\u884c\u76f8\u5173\u64cd\u4f5c 2.\u76d1\u89c6\u7684\u5c5e\u6027\u5fc5\u987b\u5b58\u5728\uff0c\u624d [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[41,1],"tags":[38],"_links":{"self":[{"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/posts\/938"}],"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=938"}],"version-history":[{"count":2,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/posts\/938\/revisions"}],"predecessor-version":[{"id":946,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/posts\/938\/revisions\/946"}],"wp:attachment":[{"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=938"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=938"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=938"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}