{"id":5005,"date":"2016-04-27T12:02:42","date_gmt":"2016-04-27T04:02:42","guid":{"rendered":"https:\/\/sdeno.com\/?p=5005"},"modified":"2016-04-27T14:09:11","modified_gmt":"2016-04-27T06:09:11","slug":"avalon-js%e5%8e%9f%e7%90%86%e4%bb%a5%e5%8f%8aobject-defineproperty","status":"publish","type":"post","link":"https:\/\/sdeno.com\/?p=5005","title":{"rendered":"avalon.js\u539f\u7406\u4ee5\u53caObject.defineProperty"},"content":{"rendered":"<p>avalon.js\u662f\u57fa\u4e8eObject.defineProperty\u5b9e\u73b0\u7684\u53cc\u5411\u6570\u636e\u7ed1\u5b9a\u7684\uff0c\u4f46\u662f\u5bf9\u4e8eIE6\/7\/8\u6d4f\u89c8\u5668\u7684\u4e0d\u517c\u5bb9\u5c31\u4f7f\u7528VBscript\u505a\u517c\u5bb9\u5904\u7406\uff0c\u8fd9\u91cc\u5c31\u4e0d\u8003\u8651VB\u4e86\uff0c\u6765\u4ecb\u7ecd\u4e0bObject.defineProperty\u5c01\u88c5\u5c5e\u6027\u8bbf\u95ee\u5668\u3002<\/p>\n<pre>Object.defineProperty(obj, prop, descriptor)  \/\/\u5f85\u4fee\u6539\u7684\u5bf9\u8c61,\u5e26\u4fee\u6539\u7684\u5c5e\u6027\u540d\u79f0,\u5f85\u4fee\u6539\u5c5e\u6027\u7684\u76f8\u5173\u63cf\u8ff0<\/pre>\n<p>\u4f8b\u5b50\uff1a<\/p>\n<pre>var obj={};\r\n\r\nObject.defineProperty(obj, \"name\", {  \/\/\u4f5c\u7528\u5bf9\u8c61\u662fobj,\u8bbe\u7f6ename\u5c5e\u6027\uff08\u53ef\u80fd\u662f\u4fee\u6539\u6216\u8005\u6dfb\u52a0\u5c5e\u6027\u540d\uff09\r\n  value:undefined, \/\/\u5c5e\u6027\u7684\u9ed8\u8ba4\u503c\r\n  writable:false, \/\/\u5c5e\u6027\u662f\u5426\u53ef\u91cd\u5199\u3002\u53ef\u91cd\u5199\u7684\u542b\u4e49\u5305\u62ec\uff1a\u662f\u5426\u53ef\u4ee5\u5bf9\u5c5e\u6027\u8fdb\u884c\u91cd\u65b0\u8d4b\u503c\r\n  enumerable:false, \/\/\u5c5e\u6027\u662f\u5426\u53ef\u679a\u4e3e\u3002\u53ef\u679a\u4e3e\u7684\u542b\u4e49\u5305\u62ec\uff1a\u662f\u5426\u53ef\u4ee5\u901a\u8fc7 for...in \u904d\u5386\u5230\uff0c\u662f\u5426\u53ef\u4ee5\u901a\u8fc7 Object.keys() \u65b9\u6cd5\u83b7\u53d6\u5c5e\u6027\u540d\u79f0\u3002\r\n  configuration:false, \/\/\u5c5e\u6027\u662f\u5426\u53ef\u914d\u7f6e\u3002\u53ef\u914d\u7f6e\u7684\u542b\u4e49\u5305\u62ec\uff1a\u662f\u5426\u53ef\u4ee5\u5220\u9664\u5c5e\u6027\uff08 delete \uff09\uff0c\u662f\u5426\u53ef\u4ee5\u4fee\u6539\u5c5e\u6027\u7684 writable \u3001 enumerable \u3001 configurable \u5c5e\u6027\r\n  set:function(){ \r\n      \/\/\u5c5e\u6027\u7684\u91cd\u5199\u5668\uff08\u6682\u4e14\u8fd9\u4e48\u53eb\uff09\u3002\u4e00\u65e6\u5c5e\u6027\u88ab\u91cd\u65b0\u8d4b\u503c\uff0c\u6b64\u65b9\u6cd5\u88ab\u81ea\u52a8\u8c03\u7528\r\n  },\r\n  get:function(){\r\n      \/\/\u5c5e\u6027\u7684\u8bfb\u53d6\u5668\uff08\u6682\u4e14\u8fd9\u4e48\u53eb\uff09\u3002\u4e00\u65e6\u5c5e\u6027\u88ab\u8bbf\u95ee\u8bfb\u53d6\uff0c\u6b64\u65b9\u6cd5\u88ab\u81ea\u52a8\u8c03\u7528\r\n  }\r\n});\r\n\r\n\u6ce8\u610f\uff1a\u67d0\u4e2a\u5c5e\u6027\u8bbe\u7f6e\u4e86 writable \u6216\u8005 value \u5c5e\u6027\uff0c\u90a3\u4e48\u8fd9\u4e2a\u5c5e\u6027\u5c31\u4e0d\u80fd\u58f0\u660e get \u548c set \u4e86\uff0c\u53cd\u4e4b\u4ea6\u7136\u3002<\/pre>\n<p>\u539f\u4f5c\u8005\u5730\u5740\u8fd8\u7b80\u5355\u4ecb\u7ecd\u4e86\u5176\u4ed6mvvm\u7684\u5b9e\u73b0\u539f\u7406\u611f\u8c22\u86cb\u7cd5\u4ed9\u4eba\uff1a<a href=\"http:\/\/blog.gejiawen.com\/2015\/04\/02\/2-way-data-binding-and-define-property\/\" target=\"_blank\">\u00a0http:\/\/blog.gejiawen.com\/2015\/04\/02\/2-way-data-binding-and-define-property\/<\/a><\/p>\n<p>&nbsp;<\/p>\n<p>\u66f4\u591a\u7684Object.defineProperty\u53c2\u6570\u4e2d\u7684descriptor\u4ecb\u7ecd\uff1a<\/p>\n<p><a href=\"http:\/\/www.jb51.net\/article\/48594.htm\" target=\"_blank\">http:\/\/www.jb51.net\/article\/48594.htm<\/a><\/p>\n<p><a href=\"https:\/\/sdeno.com\/?p=5007\" target=\"_blank\">https:\/\/sdeno.com\/?p=5007<\/a><\/p>\n<p>&nbsp;<\/p>\n<p>MDN\uff1a<a href=\"https:\/\/developer.mozilla.org\/zh-CN\/docs\/Web\/JavaScript\/Reference\/Global_Objects\/Object\/defineProperty\" target=\"_blank\">https:\/\/developer.mozilla.org\/zh-CN\/docs\/Web\/JavaScript\/Reference\/Global_Objects\/Object\/defineProperty<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>avalon.js\u662f\u57fa\u4e8eObject.defineProperty\u5b9e\u73b0\u7684\u53cc\u5411\u6570\u636e\u7ed1\u5b9a\u7684\uff0c\u4f46\u662f\u5bf9\u4e8eIE6\/7\/8 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37],"tags":[],"class_list":["post-5005","post","type-post","status-publish","format-standard","hentry","category-avalon-js"],"_links":{"self":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts\/5005","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5005"}],"version-history":[{"count":0,"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts\/5005\/revisions"}],"wp:attachment":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5005"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5005"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5005"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}