{"id":167262,"date":"2024-05-08T15:58:59","date_gmt":"2024-05-08T07:58:59","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/167262.html"},"modified":"2024-05-08T15:59:03","modified_gmt":"2024-05-08T07:59:03","slug":"javascript%e5%af%b9%e8%b1%a1%e5%b1%9e%e6%80%a7%e4%b8%ba%e4%bb%80%e4%b9%88%e8%a6%81%e5%8c%ba%e5%88%86%e5%8f%af%e6%9e%9a%e4%b8%be%e5%92%8c%e4%b8%8d%e5%8f%af%e6%9e%9a%e4%b8%be","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/167262.html","title":{"rendered":"javascript\u5bf9\u8c61\u5c5e\u6027\u4e3a\u4ec0\u4e48\u8981\u533a\u5206\u53ef\u679a\u4e3e\u548c\u4e0d\u53ef\u679a\u4e3e"},"content":{"rendered":"

\"javascript\u5bf9\u8c61\u5c5e\u6027\u4e3a\u4ec0\u4e48\u8981\u533a\u5206\u53ef\u679a\u4e3e\u548c\u4e0d\u53ef\u679a\u4e3e\"<\/p>\n

\u5728JavaScript\u4e2d\uff0c\u5bf9\u8c61\u5c5e\u6027\u7684\u53ef\u679a\u4e3e\u6027\uff08enumerability\uff09\u533a\u5206\u662f\u81f3\u5173\u91cd\u8981\u7684\uff0c\u56e0\u4e3a\u8fd9\u4e2a\u7279\u6027\u51b3\u5b9a\u4e86\u5c5e\u6027\u662f\u5426\u53ef\u4ee5\u51fa\u73b0\u5728for...in<\/code>\u5faa\u73af\u4e2d\uff0c\u6216\u8005\u80fd\u5426\u901a\u8fc7Object.keys()<\/code>\u65b9\u6cd5\u88ab\u83b7\u53d6\u3002\u53ef\u679a\u4e3e\u5c5e\u6027\u53ef\u4ee5\u88ab\u904d\u5386\u3001\u4e0d\u53ef\u679a\u4e3e\u5c5e\u6027\u5219\u5bf9\u4fdd\u62a4\u5bf9\u8c61\u5185\u90e8\u5b9e\u73b0\u7ec6\u8282\u8d77\u5230\u5173\u952e\u4f5c\u7528<\/strong>\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u8fd9\u79cd\u673a\u5236\u5141\u8bb8\u5f00\u53d1\u8005\u66f4\u7cbe\u7ec6\u5730\u63a7\u5236\u54ea\u4e9b\u5c5e\u6027\u5e94\u8be5\u88ab\u516c\u5f00\uff0c\u54ea\u4e9b\u5e94\u8be5\u88ab\u5185\u90e8\u9690\u85cf\uff0c\u4ee5\u53ca\u5982\u4f55\u4ee5\u4e00\u79cd\u66f4\u5b89\u5168\u3001\u66f4\u7075\u6d3b\u7684\u65b9\u5f0f\u7ba1\u7406\u5bf9\u8c61\u5c5e\u6027\u3002<\/p>\n<\/p>\n

\u4e3a\u4f55\u8981\u533a\u5206\u53ef\u679a\u4e3e\u548c\u4e0d\u53ef\u679a\u4e3e?<\/strong> \u4e3b\u8981\u662f\u4e3a\u4e86\u5bf9\u8c61\u5c01\u88c5\u6027\u7684\u9700\u8981<\/strong>\u3002\u5c01\u88c5\u6027\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u7684\u4e00\u4e2a\u6838\u5fc3\u6982\u5ff5\uff0c\u65e8\u5728\u9690\u85cf\u4e0d\u9700\u8981\u516c\u5f00\u7684\u5185\u90e8\u5b9e\u73b0\u7ec6\u8282\uff0c\u53ea\u5411\u5916\u754c\u66b4\u9732\u5fc5\u8981\u7684\u63a5\u53e3\u3002JavaScript\u901a\u8fc7\u5141\u8bb8\u8bbe\u7f6e\u5c5e\u6027\u7684\u53ef\u679a\u4e3e\u6027\uff0c\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u5355\u6709\u6548\u7684\u65b9\u5f0f\u6765\u52a0\u5f3a\u5bf9\u8c61\u7684\u5c01\u88c5\u6027\uff0c\u4f7f\u5f97\u5f00\u53d1\u8005\u80fd\u591f\u6784\u5efa\u51fa\u66f4\u52a0\u5b89\u5168\u3001\u6613\u4e8e\u7ef4\u62a4\u548c\u4e92\u64cd\u4f5c\u7684\u4ee3\u7801\u3002\u4f8b\u5982\uff0c\u5bf9\u8c61\u7684\u5185\u90e8\u65b9\u6cd5\u6216\u8005\u4e00\u4e9b\u4ec5\u4f9b\u5185\u90e8\u4f7f\u7528\u7684\u5c5e\u6027\u5c31\u53ef\u4ee5\u88ab\u8bbe\u7f6e\u4e3a\u4e0d\u53ef\u679a\u4e3e\u7684\uff0c\u4ece\u800c\u5728\u4f7f\u7528for...in<\/code>\u5faa\u73af\u6216Object.keys()<\/code>\u7b49\u65b9\u6cd5\u65f6\u4e0d\u4f1a\u88ab\u610f\u5916\u8bbf\u95ee\u6216\u4fee\u6539\uff0c\u51cf\u5c11\u4e86\u7a0b\u5e8f\u7684\u6f5c\u5728\u9519\u8bef\u548c\u5b89\u5168\u98ce\u9669\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u7406\u89e3\u53ef\u679a\u4e3e\u6027<\/h3>\n<\/p>\n

\u53ef\u679a\u4e3e\u6027\u662f\u5bf9\u8c61\u5c5e\u6027\u7684\u4e00\u4e2a\u91cd\u8981\u7279\u5f81\uff0c\u5b83\u51b3\u5b9a\u4e86\u5c5e\u6027\u662f\u5426\u80fd\u88ab\u67d0\u4e9b\u64cd\u4f5c\u904d\u5386\u5230\u3002\u5728JavaScript\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7Object.defineProperty()<\/code>\u65b9\u6cd5\u6765\u8bbe\u7f6e\u5c5e\u6027\u7684enumerable<\/code>\u7279\u6027\u3002\u5f53\u8fd9\u4e00\u7279\u6027\u88ab\u8bbe\u7f6e\u4e3afalse<\/code>\u65f6\uff0c\u8be5\u5c5e\u6027\u5c31\u6210\u4e86\u4e0d\u53ef\u679a\u4e3e\u7684\u3002\u8fd9\u610f\u5473\u7740\u8be5\u5c5e\u6027\u4e0d\u4f1a\u51fa\u73b0\u5728\u901a\u8fc7for...in<\/code>\u5faa\u73af\u6291\u6216\u662fObject.keys()<\/code>\u3001Object.getOwnPropertyNames()<\/code>\u3001JSON.stringify()<\/code>\u65b9\u6cd5\u8fd4\u56de\u7684\u5c5e\u6027\u5217\u8868\u4e2d\u3002<\/p>\n<\/p>\n

\u4e8c\u3001\u5c01\u88c5\u6027\u548c\u4fdd\u62a4<\/h3>\n<\/p>\n

\u5229\u7528\u53ef\u679a\u4e3e\u5c5e\u6027\u548c\u4e0d\u53ef\u679a\u4e3e\u5c5e\u6027\u7684\u533a\u5206\u53ef\u4ee5\u589e\u5f3a\u5bf9\u8c61\u7684\u5c01\u88c5\u6027\u3002\u901a\u8fc7\u5c06\u67d0\u4e9b\u5185\u90e8\u4f7f\u7528\u7684\u5c5e\u6027\u8bbe\u7f6e\u4e3a\u4e0d\u53ef\u679a\u4e3e\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u907f\u514d\u5916\u90e8\u5bf9\u8fd9\u4e9b\u5c5e\u6027\u7684\u76f4\u63a5\u8bbf\u95ee\u6216\u4fee\u6539\uff0c\u5b9e\u73b0\u66f4\u597d\u7684\u5c01\u88c5\u548c\u4fdd\u62a4\u3002\u8fd9\u5bf9\u4e8e\u5e93\u6216\u6846\u67b6\u7684\u5f00\u53d1\u8005\u5c24\u5176\u91cd\u8981\uff0c\u56e0\u4e3a\u5b83\u4eec\u9700\u8981\u786e\u4fdd\u7528\u6237\u53ea\u80fd\u770b\u89c1\u6216\u4ea4\u4e91\u5f69\u9488\u5bf9\u516c\u5171API\u7684\u64cd\u4f5c\uff0c\u800c\u4e0d\u662f\u5185\u90e8\u5b9e\u73b0\u7ec6\u8282\u3002<\/p>\n<\/p>\n

\u4e09\u3001\u53ef\u679a\u4e3e\u5c5e\u6027\u7684\u4f7f\u7528\u573a\u666f<\/h3>\n<\/p>\n

\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u53ef\u679a\u4e3e\u5c5e\u6027\u4e3b\u8981\u7528\u4e8e\u5bf9\u8c61\u5bf9\u5916\u516c\u5f00\u7684\u90e8\u5206\uff0c\u4ee5\u4fbf\u80fd\u591f\u901a\u8fc7\u904d\u5386\u83b7\u53d6\u5bf9\u8c61\u7684\u4fe1\u606f\u3002\u8fd9\u5bf9\u4e8e\u5f00\u53d1\u8005\u5728\u6784\u5efa\u516c\u5f00API\u65f6\u975e\u5e38\u6709\u7528\uff0c\u4ed6\u4eec\u53ef\u4ee5\u63a7\u5236\u54ea\u4e9b\u5c5e\u6027\u53ef\u4ee5\u901a\u8fc7\u52a8\u6001\u904d\u5386\u7684\u65b9\u5f0f\u88ab\u5916\u90e8\u8bbf\u95ee\u548c\u4f7f\u7528\u3002\u6b64\u5916\uff0c\u53ef\u679a\u4e3e\u5c5e\u6027\u8fd8\u5e38\u7528\u4e8e\u5bf9\u8c61\u7684\u5e8f\u5217\u5316\uff0c\u4f7f\u5f97\u53ea\u6709\u6307\u5b9a\u7684\u5c5e\u6027\u88ab\u8f6c\u6362\u6210JSON\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n

\u56db\u3001\u4e0d\u53ef\u679a\u4e3e\u5c5e\u6027\u7684\u5e94\u7528<\/h3>\n<\/p>\n

\u4e0d\u53ef\u679a\u4e3e\u5c5e\u6027\u901a\u5e38\u7528\u6765\u9690\u85cf\u5bf9\u8c61\u7684\u5185\u90e8\u72b6\u6001\u6216\u5b9e\u73b0\u7ec6\u8282\uff0c\u4ece\u800c\u9632\u6b62\u5916\u90e8\u76f4\u63a5\u8bbf\u95ee\u548c\u4fee\u6539\u3002\u5728\u5185\u90e8\uff0c\u5e93\u548c\u6846\u67b6\u7684\u8bbe\u8ba1\u8005\u53ef\u4ee5\u5229\u7528\u4e0d\u53ef\u679a\u4e3e\u5c5e\u6027\u5b58\u50a8\u5185\u90e8\u72b6\u6001\uff0c\u800c\u4e0d\u5fc5\u62c5\u5fc3\u8fd9\u4e9b\u72b6\u6001\u4f1a\u88ab\u5916\u90e8\u4ee3\u7801\u610f\u5916\u66f4\u6539\u6216\u5728\u4f7f\u7528for...in<\/code>\u5faa\u73af\u65f6\u88ab\u904d\u5386\u5230\u3002\u8fd9\u6709\u52a9\u4e8e\u51cf\u5c11\u7531\u4e8e\u5916\u90e8\u8bbf\u95ee\u5bfc\u81f4\u7684\u610f\u5916\u6216\u5b89\u5168\u6f0f\u6d1e\u3002<\/p>\n<\/p>\n

\u4e94\u3001\u5982\u4f55\u5904\u7406\u53ef\u679a\u4e3e\u548c\u4e0d\u53ef\u679a\u4e3e\u5c5e\u6027<\/h3>\n<\/p>\n

\u5728\u5904\u7406\u5bf9\u8c61\u5c5e\u6027\u65f6\uff0c\u4e86\u89e3\u5b83\u4eec\u7684\u53ef\u679a\u4e3e\u6027\u975e\u5e38\u5173\u952e\u3002\u867d\u7136for...in<\/code>\u5faa\u73af\u548cObject.keys()<\/code>\u65b9\u6cd5\u53ea\u64cd\u4f5c\u53ef\u679a\u4e3e\u5c5e\u6027\uff0c\u4f46Object.getOwnPropertyNames()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u8fd4\u56de\u6240\u6709\u81ea\u6709\u5c5e\u6027\u7684\u952e\uff0c\u65e0\u8bba\u5b83\u4eec\u662f\u5426\u53ef\u679a\u4e3e\u3002\u56e0\u6b64\uff0c\u5f53\u9700\u8981\u83b7\u53d6\u5bf9\u8c61\u7684\u5168\u90e8\u5c5e\u6027\uff0c\u5305\u62ec\u4e0d\u53ef\u679a\u4e3e\u7684\u5c5e\u6027\u65f6\uff0c\u5e94\u8be5\u4f7f\u7528Object.getOwnPropertyNames()<\/code>\u3002<\/p>\n<\/p>\n

\u516d\u3001\u603b\u7ed3<\/h3>\n<\/p>\n

JavaScript\u4e2d\u5c5e\u6027\u7684\u53ef\u679a\u4e3e\u6027\u533a\u5206\uff0c\u662f\u63a7\u5236\u5bf9\u8c61\u5c01\u88c5\u6027\u548c\u4fe1\u606f\u9690\u85cf\u7684\u4e00\u79cd\u673a\u5236<\/strong>\u3002\u901a\u8fc7\u5c06\u5185\u90e8\u5c5e\u6027\u8bbe\u7f6e\u4e3a\u4e0d\u53ef\u679a\u4e3e\uff0c\u53ef\u4ee5\u9632\u6b62\u8fd9\u4e9b\u5c5e\u6027\u5728\u5916\u90e8\u88ab\u904d\u5386\u5230\uff0c\u4ece\u800c\u589e\u5f3a\u4e86\u4ee3\u7801\u7684\u5b89\u5168\u6027\u548c\u5065\u58ee\u6027\u3002\u540c\u65f6\uff0c\u5f00\u53d1\u8005\u8fd8\u53ef\u4ee5\u901a\u8fc7\u8fd9\u4e00\u673a\u5236\uff0c\u6709\u9009\u62e9\u6027\u5730\u66b4\u9732\u5bf9\u8c61\u7684\u90e8\u5206\u5c5e\u6027\u7ed9\u5916\u754c\u4f7f\u7528\uff0c\u4e3a\u5bf9\u8c61\u7684\u4ea4\u4e92\u63d0\u4f9b\u4e86\u66f4\u5927\u7684\u7075\u6d3b\u6027\u548c\u63a7\u5236\u80fd\u529b\u3002\u56e0\u6b64\uff0c\u7406\u89e3\u548c\u5408\u7406\u5229\u7528\u5c5e\u6027\u7684\u53ef\u679a\u4e3e\u6027\uff0c\u5bf9\u4e8e\u7f16\u5199\u9ad8\u8d28\u91cf\u7684JavaScript\u4ee3\u7801\u6765\u8bf4\u975e\u5e38\u91cd\u8981\u3002<\/p>\n<\/p>\n

\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n

\u4e3a\u4ec0\u4e48JavaScript\u5bf9\u8c61\u5c5e\u6027\u9700\u8981\u533a\u5206\u53ef\u679a\u4e3e\u548c\u4e0d\u53ef\u679a\u4e3e\uff1f<\/strong><\/p>\n

\u4ec0\u4e48\u662f\u53ef\u679a\u4e3e\u548c\u4e0d\u53ef\u679a\u4e3e\u7684\u5c5e\u6027\uff1f\u4e3a\u4ec0\u4e48\u8981\u533a\u5206\u5b83\u4eec\uff1f<\/strong><\/p>\n

\u5982\u4f55\u5224\u65ad\u4e00\u4e2a JavaScript \u5bf9\u8c61\u5c5e\u6027\u662f\u53ef\u679a\u4e3e\u7684\u8fd8\u662f\u4e0d\u53ef\u679a\u4e3e\u7684\uff1f\u6709\u4ec0\u4e48\u5e94\u7528\u573a\u666f\uff1f<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"\u5728JavaScript\u4e2d\uff0c\u5bf9\u8c61\u5c5e\u6027\u7684\u53ef\u679a\u4e3e\u6027\uff08enumerability\uff09\u533a\u5206\u662f\u81f3\u5173\u91cd\u8981\u7684\uff0c\u56e0\u4e3a\u8fd9\u4e2a\u7279\u6027\u51b3\u5b9a\u4e86 […]","protected":false},"author":3,"featured_media":167266,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/167262"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=167262"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/167262\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/167266"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=167262"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=167262"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=167262"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}