{"id":158221,"date":"2024-05-08T12:45:58","date_gmt":"2024-05-08T04:45:58","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/158221.html"},"modified":"2024-05-08T12:46:02","modified_gmt":"2024-05-08T04:46:02","slug":"%e5%a6%82%e4%bd%95%e9%80%9a%e4%bf%97%e8%a7%a3%e9%87%8a-javascript-%e4%b8%ad%e7%9a%84%e5%8e%9f%e5%9e%8b%e6%a6%82%e5%bf%b5","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/158221.html","title":{"rendered":"\u5982\u4f55\u901a\u4fd7\u89e3\u91ca JavaScript \u4e2d\u7684\u539f\u578b\u6982\u5ff5"},"content":{"rendered":"

\"\u5982\u4f55\u901a\u4fd7\u89e3\u91ca<\/p>\n

JavaScript \u4e2d\u7684\u539f\u578b\u6982\u5ff5\u53ef\u4ee5\u901a\u4fd7\u89e3\u91ca\u4e3a\u4e00\u4e2a\u5bf9\u8c61\u6307\u5411\u53e6\u4e00\u4e2a\u5bf9\u8c61\u7684\u94fe\u63a5\uff0c\u8fd9\u79cd\u94fe\u63a5\u5b58\u5728\u7684\u76ee\u7684\u662f\u4e3a\u4e86\u5b9e\u73b0\u5bf9\u8c61\u4e4b\u95f4\u5171\u4eab\u7279\u6027\u548c\u884c\u4e3a\u7684\u673a\u5236\u3002\u539f\u578b\u94fe\u673a\u5236\u3001\u5bf9\u8c61\u95f4\u7279\u6027\u5171\u4eab\u3001\u8282\u7701\u5185\u5b58\u7a7a\u95f4<\/strong> \u662f\u539f\u578b\u6982\u5ff5\u7684\u6838\u5fc3\u3002\u8fd9\u91cc\u91cd\u70b9\u5c55\u5f00\u63cf\u8ff0\u201c\u5bf9\u8c61\u95f4\u7279\u6027\u5171\u4eab\u201d\u8fd9\u4e00\u70b9\uff1a\u5728 JavaScript \u4e2d\uff0c\u5f53\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\u65f6\uff0c\u8fd9\u4e2a\u5bf9\u8c61\u4f1a\u81ea\u52a8\u5173\u8054\u5230\u5b83\u7684\u539f\u578b\u5bf9\u8c61\uff0c\u800c\u8fd9\u4e2a\u539f\u578b\u5bf9\u8c61\u5305\u542b\u4e86\u53ef\u4ee5\u88ab\u591a\u4e2a\u5b9e\u4f8b\u5171\u4eab\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u8fd9\u610f\u5473\u7740\uff0c\u6211\u4eec\u4e0d\u9700\u8981\u5728\u6bcf\u4e2a\u5bf9\u8c61\u5b9e\u4f8b\u4e2d\u91cd\u590d\u5b9a\u4e49\u76f8\u540c\u7684\u65b9\u6cd5\uff0c\u53ea\u9700\u8981\u5728\u5b83\u4eec\u5171\u540c\u7684\u539f\u578b\u5bf9\u8c61\u4e0a\u5b9a\u4e49\u4e00\u6b21\uff0c\u90a3\u4e48\u6240\u6709\u7684\u5b9e\u4f8b\u90fd\u53ef\u4ee5\u8bbf\u95ee\u5230\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u4ece\u800c\u5b9e\u73b0\u4e86\u7279\u6027\u7684\u5171\u4eab\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u7406\u89e3\u539f\u578b\u5bf9\u8c61<\/h3>\n<\/p>\n

JavaScript \u4e2d\u7684\u6bcf\u4e2a\u5bf9\u8c61\u5728\u521b\u5efa\u65f6\u90fd\u4f1a\u4e0e\u53e6\u4e00\u4e2a\u5bf9\u8c61\u76f8\u5173\u8054\uff0c\u8fd9\u4e2a\u76f8\u5173\u8054\u7684\u5bf9\u8c61\u5c31\u88ab\u79f0\u4e3a\u539f\u578b\u3002\u539f\u578b\u5bf9\u8c61\u672c\u8eab\u4e5f\u662f\u4e00\u4e2a\u666e\u901a\u7684\u5bf9\u8c61\uff0c\u4f46\u5b83\u7684\u4e3b\u8981\u7528\u9014\u662f\u5305\u542b\u53ef\u4ee5\u88ab\u5176\u4ed6\u5bf9\u8c61\u5171\u4eab\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u6bcf\u4e2a\u51fd\u6570\u5728\u521b\u5efa\u65f6\u4f1a\u6709\u4e00\u4e2a prototype<\/code> \u5c5e\u6027\uff0c\u6307\u5411\u5176\u539f\u578b\u5bf9\u8c61\uff0c\u800c\u901a\u8fc7\u8fd9\u4e2a\u51fd\u6570\u521b\u5efa\u7684\u6240\u6709\u5b9e\u4f8b\u5bf9\u8c61\u4f1a\u81ea\u52a8\u5c06\u5176 __proto__<\/code> \u5c5e\u6027\u6307\u5411\u8be5\u51fd\u6570\u7684 prototype<\/code> \u5c5e\u6027\uff0c\u4ece\u800c\u5f62\u6210\u4e00\u4e2a\u94fe\u63a5\uff0c\u4f7f\u5f97\u5b9e\u4f8b\u80fd\u591f\u8bbf\u95ee\u5728\u539f\u578b\u5bf9\u8c61\u4e0a\u5b9a\u4e49\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/p>\n<\/p>\n

\u4e8c\u3001\u539f\u578b\u94fe\u673a\u5236\u7684\u5de5\u4f5c\u539f\u7406<\/h3>\n<\/p>\n

\u5f53\u8bbf\u95ee\u4e00\u4e2a\u5bf9\u8c61\u7684\u67d0\u4e2a\u5c5e\u6027\u6216\u65b9\u6cd5\u65f6\uff0c\u5982\u679c\u8be5\u5bf9\u8c61\u672c\u8eab\u5e76\u6ca1\u6709\u8fd9\u4e2a\u5c5e\u6027\u6216\u65b9\u6cd5\uff0cJavaScript \u5c31\u4f1a\u901a\u8fc7\u8fd9\u4e2a\u5bf9\u8c61\u7684 __proto__<\/code> \u94fe\u63a5\u53bb\u5176\u539f\u578b\u5bf9\u8c61\u4e0a\u67e5\u627e\u3002\u5982\u679c\u5176\u539f\u578b\u5bf9\u8c61\u4e0a\u4e5f\u6ca1\u6709\uff0c\u90a3\u4e48\u7ee7\u7eed\u6cbf\u7740\u539f\u578b\u94fe\u5411\u4e0a\u67e5\u627e\uff0c\u76f4\u5230\u627e\u5230\u6216\u8005\u67e5\u627e\u5230\u539f\u578b\u94fe\u7684\u9876\u7aef\uff08Object.prototype<\/code> \u7684\u539f\u578b\u662f null<\/code>\uff09\u3002\u8fd9\u4e2a\u57fa\u4e8e\u539f\u578b\u94fe\u7684\u67e5\u627e\u673a\u5236\u8ba9\u6765\u81ea\u4e0d\u540c\u5b9e\u4f8b\u7684\u5bf9\u8c61\u53ef\u4ee5\u5171\u4eab\u539f\u578b\u5bf9\u8c61\u4e0a\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u4ece\u800c\u5b9e\u73b0\u7ee7\u627f\u548c\u7279\u6027\u5171\u4eab\u3002<\/p>\n<\/p>\n

\u4e09\u3001\u8282\u7701\u5185\u5b58\u7684\u4f18\u52bf<\/h3>\n<\/p>\n

\u4f7f\u7528\u539f\u578b\u94fe\u673a\u5236\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u90a3\u4e9b\u4e0d\u53d8\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u5b9a\u4e49\u5728\u539f\u578b\u5bf9\u8c61\u4e0a\uff0c\u8ba9\u6240\u6709\u901a\u8fc7\u76f8\u540c\u6784\u9020\u51fd\u6570\u521b\u5efa\u7684\u5b9e\u4f8b\u5171\u4eab\u8fd9\u4e9b\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u8fd9\u79cd\u65b9\u6cd5\u76f8\u8f83\u4e8e\u5728\u6bcf\u4e2a\u5b9e\u4f8b\u5bf9\u8c61\u4e0a\u5206\u522b\u5b9a\u4e49\u8fd9\u4e9b\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5927\u5927\u8282\u7701\u5185\u5b58\u8d44\u6e90\u3002\u56e0\u4e3a\u8fd9\u6837\u505a\uff0c\u65e0\u8bba\u521b\u5efa\u591a\u5c11\u4e2a\u5b9e\u4f8b\u5bf9\u8c61\uff0c\u5b83\u4eec\u5171\u4eab\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u90fd\u53ea\u6709\u4e00\u4efd\u62f7\u8d1d\uff0c\u8fd9\u5bf9\u4e8e\u6027\u80fd\u4f18\u5316\u548c\u8d44\u6e90\u7ba1\u7406<\/a>\u6765\u8bf4\u662f\u975e\u5e38\u6709\u76ca\u7684\u3002<\/p>\n<\/p>\n

\u56db\u3001\u521b\u5efa\u5bf9\u8c61\u7684\u4e0d\u540c\u65b9\u5f0f\u5bf9\u539f\u578b\u7684\u5f71\u54cd<\/h3>\n<\/p>\n

\u5728 JavaScript \u4e2d\uff0c\u521b\u5efa\u5bf9\u8c61\u53ef\u4ee5\u6709\u591a\u79cd\u65b9\u5f0f\uff0c\u5982\u4f7f\u7528\u6784\u9020\u51fd\u6570\u3001Object.create<\/code> \u65b9\u6cd5\u7b49\u3002\u8fd9\u4e9b\u4e0d\u540c\u7684\u521b\u5efa\u65b9\u5f0f\u4f1a\u5bf9\u5bf9\u8c61\u7684\u539f\u578b\u94fe\u6709\u4e0d\u540c\u7684\u5f71\u54cd\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u6784\u9020\u51fd\u6570\u521b\u5efa\u5bf9\u8c61\uff0c\u5b9e\u4f8b\u7684\u539f\u578b\u88ab\u8bbe\u7f6e\u4e3a\u6784\u9020\u51fd\u6570\u7684 prototype<\/code> \u5bf9\u8c61\uff1b\u800c\u4f7f\u7528 Object.create<\/code> \u65b9\u6cd5\u5219\u53ef\u4ee5\u76f4\u63a5\u6307\u5b9a\u4e00\u4e2a\u5bf9\u8c61\u4f5c\u4e3a\u65b0\u521b\u5efa\u5bf9\u8c61\u7684\u539f\u578b\u3002\u7406\u89e3\u8fd9\u4e9b\u521b\u5efa\u5bf9\u8c61\u7684\u65b9\u5f0f\u53ca\u5176\u5bf9\u539f\u578b\u94fe\u7684\u5f71\u54cd\uff0c\u6709\u52a9\u4e8e\u6df1\u5165\u7406\u89e3\u548c\u5e94\u7528\u539f\u578b\u548c\u539f\u578b\u94fe\u7684\u7279\u6027\u3002<\/p>\n<\/p>\n

\u4e94\u3001\u539f\u578b\u6982\u5ff5\u5728\u73b0\u4ee3JavaScript\u5f00\u53d1\u4e2d\u7684\u5e94\u7528<\/h3>\n<\/p>\n

\u539f\u578b\u6982\u5ff5\u4e0d\u4ec5\u662f\u7406\u89e3 JavaScript \u7ee7\u627f\u673a\u5236\u7684\u57fa\u7840\uff0c\u800c\u4e14\u4e5f\u5bf9\u4e8e\u7406\u89e3\u548c\u4f7f\u7528\u73b0\u4ee3 JavaScript \u6846\u67b6\u548c\u5e93\u975e\u5e38\u91cd\u8981\u3002\u4f8b\u5982\uff0c\u8bb8\u591a\u6d41\u884c\u7684JavaScript\u6846\u67b6\u548c\u5e93\u90fd\u4f7f\u7528\u539f\u578b\u6982\u5ff5\u6765\u6269\u5c55\u5bf9\u8c61\u529f\u80fd\u6216\u5b9e\u73b0\u9ad8\u6548\u7684\u4ee3\u7801\u590d\u7528\u3002\u7406\u89e3\u539f\u578b\u53ef\u4ee5\u5e2e\u52a9\u5f00\u53d1\u8005\u66f4\u597d\u5730\u5229\u7528\u8fd9\u4e9b\u5de5\u5177\uff0c\u5199\u51fa\u66f4\u5e72\u51c0\u3001\u66f4\u9ad8\u6548\u7684\u4ee3\u7801\u3002<\/p>\n<\/p>\n

\u901a\u8fc7\u4e0a\u8ff0\u5185\u5bb9\u7684\u8bb2\u89e3\uff0c\u6211\u4eec\u5f97\u4ee5\u4ece\u901a\u4fd7\u7684\u89d2\u5ea6\u7406\u89e3 JavaScript \u4e2d\u7684\u539f\u578b\u6982\u5ff5\u53ca\u5176\u5de5\u4f5c\u539f\u7406\uff0c\u5305\u62ec\u539f\u578b\u5bf9\u8c61\u3001\u539f\u578b\u94fe\u673a\u5236\u3001\u8282\u7701\u5185\u5b58\u4f18\u52bf\u3001\u521b\u5efa\u5bf9\u8c61\u65b9\u5f0f\u5bf9\u539f\u578b\u7684\u5f71\u54cd\uff0c\u4ee5\u53ca\u539f\u578b\u5728\u73b0\u4ee3\u5f00\u53d1\u4e2d\u7684\u5e94\u7528\u3002\u638c\u63e1\u8fd9\u4e9b\u77e5\u8bc6\uff0c\u5bf9\u6df1\u5165\u5b66\u4e60\u548c\u9ad8\u6548\u4f7f\u7528 JavaScript \u81f3\u5173\u91cd\u8981\u3002<\/p>\n<\/p>\n

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

1. \u4ec0\u4e48\u662f JavaScript \u4e2d\u7684\u539f\u578b\uff1f<\/strong><\/p>\n

JavaScript \u4e2d\u7684\u539f\u578b\u662f\u4e00\u79cd\u5bf9\u8c61\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a\u539f\u578b\uff0c\u901a\u8fc7\u539f\u578b\u53ef\u4ee5\u8bbf\u95ee\u5176\u4ed6\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u539f\u578b\u94fe\u662f\u4e00\u79cd\u5bf9\u8c61\u7ee7\u627f\u7684\u65b9\u5f0f\uff0c\u5b83\u53ef\u4ee5\u8ba9\u6211\u4eec\u5728 JavaScript \u4e2d\u5b9e\u73b0\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u3002<\/p>\n

2. \u539f\u578b\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff1f<\/strong><\/p>\n

\u5728 JavaScript \u4e2d\uff0c\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a __proto__<\/code> \u5c5e\u6027\uff0c\u8be5\u5c5e\u6027\u6307\u5411\u8be5\u5bf9\u8c61\u7684\u539f\u578b\u3002\u5f53\u6211\u4eec\u8bbf\u95ee\u4e00\u4e2a\u5bf9\u8c61\u7684\u5c5e\u6027\u6216\u65b9\u6cd5\u65f6\uff0c\u5982\u679c\u8be5\u5bf9\u8c61\u81ea\u8eab\u6ca1\u6709\u8be5\u5c5e\u6027\u6216\u65b9\u6cd5\uff0cJavaScript \u5c06\u4f1a\u6cbf\u7740\u539f\u578b\u94fe\u5411\u4e0a\u67e5\u627e\uff0c\u76f4\u5230\u627e\u5230\u8be5\u5c5e\u6027\u6216\u65b9\u6cd5\u4e3a\u6b62\u3002<\/p>\n

3. \u539f\u578b\u4e0e\u5b9e\u4f8b\u4e4b\u95f4\u7684\u5173\u7cfb\u662f\u600e\u6837\u7684\uff1f<\/strong><\/p>\n

\u5728 JavaScript \u4e2d\uff0c\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u662f\u901a\u8fc7\u6784\u9020\u51fd\u6570\u521b\u5efa\u7684\u5b9e\u4f8b\u3002\u6784\u9020\u51fd\u6570\u4e2d\u5b9a\u4e49\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u88ab\u6240\u6709\u5b9e\u4f8b\u5171\u4eab\uff0c\u5b83\u4eec\u5b58\u5728\u4e8e\u6784\u9020\u51fd\u6570\u7684\u539f\u578b\u4e2d\u3002\u5f53\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u5b9e\u4f8b\u65f6\uff0c\u5b9e\u4f8b\u7684 __proto__<\/code> \u5c5e\u6027\u5c06\u6307\u5411\u6784\u9020\u51fd\u6570\u7684\u539f\u578b\uff0c\u8fd9\u6837\u5b9e\u4f8b\u5c31\u53ef\u4ee5\u8bbf\u95ee\u6784\u9020\u51fd\u6570\u539f\u578b\u4e2d\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u8fd9\u79cd\u5173\u7cfb\u4f7f\u5f97\u6211\u4eec\u53ef\u4ee5\u5728\u4e0d\u540c\u7684\u5b9e\u4f8b\u4e4b\u95f4\u5171\u4eab\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u590d\u7528\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"JavaScript \u4e2d\u7684\u539f\u578b\u6982\u5ff5\u53ef\u4ee5\u901a\u4fd7\u89e3\u91ca\u4e3a\u4e00\u4e2a\u5bf9\u8c61\u6307\u5411\u53e6\u4e00\u4e2a\u5bf9\u8c61\u7684\u94fe\u63a5\uff0c\u8fd9\u79cd\u94fe\u63a5\u5b58\u5728\u7684\u76ee\u7684\u662f\u4e3a\u4e86\u5b9e\u73b0\u5bf9\u8c61 […]","protected":false},"author":3,"featured_media":158229,"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\/158221"}],"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=158221"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/158221\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/158229"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=158221"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=158221"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=158221"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}