{"id":161057,"date":"2024-05-08T13:44:20","date_gmt":"2024-05-08T05:44:20","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/161057.html"},"modified":"2024-05-08T13:44:24","modified_gmt":"2024-05-08T05:44:24","slug":"%e7%bb%8f%e5%85%b8-javascript-%e9%9d%a2%e8%af%95%e9%a2%98%e6%9c%89%e5%93%aa%e4%ba%9b","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/161057.html","title":{"rendered":"\u7ecf\u5178 JavaScript \u9762\u8bd5\u9898\u6709\u54ea\u4e9b"},"content":{"rendered":"

\"\u7ecf\u5178<\/p>\n

\u7ecf\u5178\u7684JavaScript\u9762\u8bd5\u9898\u6db5\u76d6\u4e86\u4ece\u57fa\u7840\u5230\u8fdb\u9636\u7684\u591a\u4e2a\u65b9\u9762\uff0c\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\u95ed\u5305\u3001\u539f\u578b\u94fe\u3001\u4e8b\u4ef6\u5faa\u73af\u3001\u4f5c\u7528\u57df\u3001\u5f02\u6b65\u5904\u7406\u3001\u4ee5\u53caES6+\u7684\u65b0\u7279\u6027\u7b49\u3002\u91cd\u8981\u7684\u7ecf\u5178\u9762\u8bd5\u9898\u5305\u62ec\u7406\u89e3\u95ed\u5305\u3001\u89e3\u91ca\u539f\u578b\u94fe\u3001\u638c\u63e1this\u5173\u952e\u5b57\u7684\u7528\u6cd5\u3001\u4e8b\u4ef6\u5faa\u73af\u548c\u4e8b\u4ef6\u59d4\u6258\u3001\u4ee5\u53ca\u5982\u4f55\u5b9e\u73b0\u7ee7\u627f<\/strong>\u3002\u5728\u8fd9\u4e9b\u6838\u5fc3\u8bdd\u9898\u4e2d\uff0c\u95ed\u5305\u7684\u7406\u89e3\u548c\u5e94\u7528\u65e0\u7591\u662f\u9762\u8bd5\u4e2d\u7ecf\u5e38\u9047\u5230\u4e14\u91cd\u8981\u7684\u4e00\u73af<\/strong>\u3002\u95ed\u5305\u662f\u51fd\u6570\u548c\u58f0\u660e\u8be5\u51fd\u6570\u7684\u8bcd\u6cd5\u73af\u5883\u7684\u7ec4\u5408\u3002\u95ed\u5305\u5141\u8bb8\u4e00\u4e2a\u51fd\u6570\u8bbf\u95ee\u548c\u64cd\u4f5c\u51fd\u6570\u5916\u90e8\u7684\u53d8\u91cf\u3002\u8fd9\u4e2a\u673a\u5236\u4e0d\u4ec5\u5e2e\u52a9\u5728JavaScript\u4e2d\u521b\u5efa\u79c1\u6709\u53d8\u91cf\uff0c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u5b89\u5168\u6027\uff0c\u540c\u65f6\u4e5f\u662f\u5b9e\u73b0\u6a21\u5757\u5316\u7f16\u7801\u7684\u5173\u952e\u6280\u672f\u4e4b\u4e00\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u95ed\u5305<\/h3>\n<\/p>\n

\u95ed\u5305\u5728JavaScript\u4e2d\u662f\u4e00\u4e2a\u975e\u5e38\u5f3a\u5927\u7684\u7279\u6027\uff0c\u56e0\u4e3a\u5b83\u4f7f\u5f97\u51fd\u6570\u80fd\u591f\u8bb0\u4f4f\u5e76\u8bbf\u95ee\u5176\u8bcd\u6cd5\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\uff0c\u5373\u4f7f\u51fd\u6570\u5728\u5176\u6b63\u5e38\u7684\u4f5c\u7528\u57df\u4e4b\u5916\u6267\u884c\u3002\u8fd9\u610f\u5473\u7740\u95ed\u5305\u53ef\u4ee5\u7528\u4e8e\u521b\u5efa\u79c1\u6709\u53d8\u91cf\uff0c\u56e0\u800c\u662f\u5b9e\u73b0\u6570\u636e\u5c01\u88c5\u548c\u6a21\u5757\u5316\u7f16\u7a0b\u7684\u57fa\u7840\u3002<\/p>\n<\/p>\n

\u9996\u5148\uff0c\u7406\u89e3\u95ed\u5305\u7684\u5173\u952e\u5728\u4e8e\u7406\u89e3JavaScript\u7684\u4f5c\u7528\u57df\u548c\u4f5c\u7528\u57df\u94fe\u7684\u6982\u5ff5\u3002\u5f53\u4e00\u4e2a\u51fd\u6570\u88ab\u58f0\u660e\u65f6\uff0c\u5b83\u4f1a\u521b\u5efa\u4e00\u4e2a\u4f5c\u7528\u57df\u94fe\uff0c\u8fd9\u4e2a\u94fe\u4e2d\u5305\u542b\u4e86\u51fd\u6570\u5b9a\u4e49\u65f6\u7684\u4f5c\u7528\u57df\u4ee5\u53ca\u6240\u6709\u7236\u4f5c\u7528\u57df\u3002\u8fd9\u610f\u5473\u7740\uff0c\u51fd\u6570\u5728\u6267\u884c\u65f6\uff0c\u5373\u4fbf\u662f\u5728\u5b83\u88ab\u5b9a\u4e49\u7684\u4f5c\u7528\u57df\u4e4b\u5916\u6267\u884c\uff0c\u4e5f\u53ef\u4ee5\u8bbf\u95ee\u5230\u5b83\u88ab\u5b9a\u4e49\u65f6\u7684\u4f5c\u7528\u57df\u80fd\u8bbf\u95ee\u5230\u7684\u6240\u6709\u53d8\u91cf\u3002<\/p>\n<\/p>\n

\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u95ed\u5305\u4f7f\u5f97\u6211\u4eec\u53ef\u4ee5\u5728JavaScript\u4e2d\u521b\u5efa\u6a21\u62df\u79c1\u6709\u53d8\u91cf\u7684\u529f\u80fd\u3002\u901a\u8fc7\u95ed\u5305\uff0c\u51fd\u6570\u5185\u90e8\u7684\u53d8\u91cf\u53ef\u4ee5\u88ab\u4fdd\u62a4\u8d77\u6765\uff0c\u53ea\u80fd\u901a\u8fc7\u5b9a\u4e49\u5728\u540c\u4e00\u4e2a\u95ed\u5305\u4e2d\u7684\u51fd\u6570\u8bbf\u95ee\u3002<\/p>\n<\/p>\n

\u4e8c\u3001\u539f\u578b\u94fe\u4e0e\u7ee7\u627f<\/h3>\n<\/p>\n

\u539f\u578b\u94fe\u662f\u7406\u89e3JavaScript\u5bf9\u8c61\u548c\u7ee7\u627f\u673a\u5236\u7684\u5173\u952e\u3002\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a__proto__<\/code>\u5c5e\u6027\uff0c\u6307\u5411\u5b83\u7684\u539f\u578b\u5bf9\u8c61\uff0c\u800c\u539f\u578b\u5bf9\u8c61\u4e5f\u6709\u81ea\u5df1\u7684\u539f\u578b\uff0c\u8fd9\u6837\u4e00\u7ea7\u63a5\u4e00\u7ea7\uff0c\u5f62\u6210\u4e86\u6240\u8c13\u7684\u201c\u539f\u578b\u94fe\u201d\u3002\u8fd9\u4e2a\u673a\u5236\u4f7f\u5f97\u5bf9\u8c61\u53ef\u4ee5\u7ee7\u627f\u53e6\u4e00\u4e2a\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/p>\n<\/p>\n

JavaScript\u4e2d\u5b9e\u73b0\u7ee7\u627f\u7684\u65b9\u6cd5\u4e3b\u8981\u6709\u539f\u578b\u94fe\u7ee7\u627f\u3001\u501f\u7528\u6784\u9020\u51fd\u6570\u7ee7\u627f\u3001\u7ec4\u5408\u7ee7\u627f\u3001\u539f\u578b\u5f0f\u7ee7\u627f\u3001\u5bc4\u751f\u5f0f\u7ee7\u627f\u4ee5\u53ca\u5bc4\u751f\u7ec4\u5408\u5f0f\u7ee7\u627f\u7b49\u3002\u5176\u4e2d\uff0c\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u662f\u7ec4\u5408\u7ee7\u627f\uff0c\u5b83\u7ed3\u5408\u4e86\u539f\u578b\u94fe\u7ee7\u627f\u548c\u501f\u7528\u6784\u9020\u51fd\u6570\u7ee7\u627f\u7684\u4f18\u70b9\uff0c\u6210\u4e3a\u4e86\u5b9e\u73b0\u57fa\u4e8e\u7c7b\u7684\u7ee7\u627f\u6700\u5e38\u89c1\u7684\u65b9\u5f0f\u3002<\/p>\n<\/p>\n

\u4e09\u3001\u5f02\u6b65\u5904\u7406<\/h3>\n<\/p>\n

\u5f02\u6b65\u7f16\u7a0b\u662fJavaScript\u4e2d\u7684\u53e6\u4e00\u4e2a\u6838\u5fc3\u6982\u5ff5\u3002JavaScript\u662f\u5355\u7ebf\u7a0b\u7684\uff0c\u4f46\u5b83\u901a\u8fc7\u4e8b\u4ef6\u5faa\u73af\u548c\u56de\u8c03\u51fd\u6570\u652f\u6301\u5f02\u6b65\u7f16\u7a0b\u3002\u7406\u89e3\u4e8b\u4ef6\u5faa\u73af\u3001\u56de\u8c03\u51fd\u6570\u3001Promises\u3001\u4ee5\u53caasync\/awAI<\/a>t\u662f\u638c\u63e1JavaScript\u5f02\u6b65\u7f16\u7a0b\u7684\u5173\u952e\u3002<\/p>\n<\/p>\n

\u4e8b\u4ef6\u5faa\u73af\u662fJavaScript\u5b9e\u73b0\u5f02\u6b65\u7684\u57fa\u672c\u673a\u5236\u3002\u5b83\u5141\u8bb8JavaScript\u4ee3\u7801\u5728\u6267\u884c\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u4efb\u52a1\u65f6\u4e0d\u4f1a\u963b\u585e\uff0c\u8fd9\u662f\u901a\u8fc7\u5c06\u4efb\u52a1\u5206\u4e3a\u540c\u6b65\u4efb\u52a1\u548c\u5f02\u6b65\u4efb\u52a1\u6765\u5b9e\u73b0\u7684\u3002Promise\u662f\u4e00\u4e2a\u4ee3\u8868\u4e86\u5f02\u6b65\u64cd\u4f5c\u6700\u7ec8\u5b8c\u6210\u6216\u8005\u5931\u8d25\u7684\u5bf9\u8c61\uff0c\u800casync\/await\u662f\u5efa\u7acb\u5728Promises\u4e4b\u4e0a\u7684\uff0c\u4f7f\u5f97\u5f02\u6b65\u4ee3\u7801\u66f4\u6613\u4e8e\u9605\u8bfb\u548c\u7f16\u5199\u3002<\/p>\n<\/p>\n

\u56db\u3001this\u5173\u952e\u5b57<\/h3>\n<\/p>\n

this<\/code>\u5173\u952e\u5b57\u5728JavaScript\u4e2d\u7684\u884c\u4e3a\u4e0e\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\u4e2d\u6709\u6240\u4e0d\u540c\uff0c\u5b83\u7684\u503c\u53d6\u51b3\u4e8e\u51fd\u6570\u7684\u8c03\u7528\u65b9\u5f0f\uff0c\u800c\u975e\u5b9a\u4e49\u65b9\u5f0f\u3002\u7406\u89e3this<\/code>\u7684\u56db\u79cd\u7ed1\u5b9a\u89c4\u5219\uff08\u9ed8\u8ba4\u7ed1\u5b9a\u3001\u9690\u5f0f\u7ed1\u5b9a\u3001\u663e\u5f0f\u7ed1\u5b9a\u3001new\u7ed1\u5b9a\uff09\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u7bad\u5934\u51fd\u6570\u7684\u5f15\u5165\u5bf9\u4e8ethis\u7684\u7ed1\u5b9a\u4e5f\u4ea7\u751f\u4e86\u5f71\u54cd\uff0c\u56e0\u4e3a\u7bad\u5934\u51fd\u6570\u4e0d\u7ed1\u5b9athis\uff0c\u5b83\u4f1a\u6355\u83b7\u5176\u6240\u5728\u4e0a\u4e0b\u6587\u7684this\u503c\u4f5c\u4e3a\u81ea\u5df1\u7684this\u503c\u3002<\/p>\n<\/p>\n

\u4e94\u3001ES6+\u65b0\u7279\u6027<\/h3>\n<\/p>\n

\u4eceES6\u5f00\u59cb\uff0cJavaScript\u5f15\u5165\u4e86\u8bb8\u591a\u8ba9\u8bed\u8a00\u66f4\u52a0\u73b0\u4ee3\u5316\u7684\u65b0\u7279\u6027\uff0c\u5305\u62ec\u4f46\u4e0d\u9650\u4e8elet\u548cconst\u3001\u7bad\u5934\u51fd\u6570\u3001\u6a21\u677f\u5b57\u7b26\u4e32\u3001\u89e3\u6784\u8d4b\u503c\u3001\u9ed8\u8ba4\u53c2\u6570\u3001Rest\/Spread\u64cd\u4f5c\u7b26\u3001\u7c7b\u3001\u6a21\u5757\u5316\u7b49\u3002\u638c\u63e1\u8fd9\u4e9b\u65b0\u7279\u6027\u5bf9\u4e8e\u5199\u51fa\u66f4\u7b80\u6d01\u3001\u66f4\u9ad8\u6548\u7684\u4ee3\u7801\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<\/p>\n

\u6bcf\u4e00\u6b21\u7684JavaScript\u7248\u672c\u66f4\u65b0\u90fd\u65e8\u5728\u63d0\u9ad8\u5f00\u53d1\u6548\u7387\u3001\u589e\u5f3a\u8bed\u8a00\u80fd\u529b\u3001\u6539\u8fdb\u6027\u80fd\u7b49\u65b9\u9762\u3002\u4e86\u89e3\u548c\u638c\u63e1\u8fd9\u4e9b\u65b0\u7279\u6027\uff0c\u5bf9\u4e8e\u4efb\u4f55\u5e0c\u671b\u4fdd\u6301\u5176JavaScript\u6280\u80fd\u66f4\u65b0\u7684\u5f00\u53d1\u8005\u6765\u8bf4\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u3002<\/p>\n<\/p>\n

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

    \u6709\u54ea\u4e9b\u7ecf\u5178\u7684 JavaScript \u9762\u8bd5\u9898\uff1f<\/strong>
    \n\u5728 JavaScript \u9762\u8bd5\u4e2d\uff0c\u6709\u8bb8\u591a\u7ecf\u5178\u7684\u95ee\u9898\uff0c\u5305\u62ec\uff1a\u95ed\u5305\u3001\u4f5c\u7528\u57df\u3001\u539f\u578b\u548c\u539f\u578b\u94fe\u3001\u5f02\u6b65\u7f16\u7a0b\u3001\u4e8b\u4ef6\u5faa\u73af\u3001\u95ed\u5305\u7684\u4f7f\u7528\u7b49\u7b49\u3002\u8fd9\u4e9b\u95ee\u9898\u65e8\u5728\u8003\u5bdf\u5019\u9009\u4eba\u5bf9 JavaScript \u7684\u7406\u89e3\u548c\u5e94\u7528\u80fd\u529b\u3002<\/p>\n<\/li>\n

  2. \n

    \u95ed\u5305\u5728 JavaScript \u9762\u8bd5\u4e2d\u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f<\/strong>
    \n\u95ed\u5305\u662f JavaScript \u4e2d\u4e00\u4e2a\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5b83\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u521b\u5efa\u79c1\u6709\u53d8\u91cf\u548c\u5c01\u88c5\u4ee3\u7801\u3002\u5728\u9762\u8bd5\u4e2d\uff0c\u9762\u8bd5\u5b98\u53ef\u80fd\u4f1a\u95ee\u5019\u9009\u4eba\u95ed\u5305\u7684\u5b9a\u4e49\u3001\u4f7f\u7528\u573a\u666f\u548c\u6ce8\u610f\u4e8b\u9879\u3002\u5019\u9009\u4eba\u53ef\u4ee5\u901a\u8fc7\u89e3\u91ca\u95ed\u5305\u7684\u539f\u7406\u548c\u5b9e\u9645\u5e94\u7528\u6765\u5c55\u793a\u4ed6\u4eec\u5bf9 JavaScript \u51fd\u6570\u4f5c\u7528\u57df\u548c\u4f5c\u7528\u57df\u94fe\u7684\u7406\u89e3\u3002<\/p>\n<\/li>\n

  3. \n

    \u5982\u4f55\u7406\u89e3 JavaScript \u4e2d\u7684\u539f\u578b\u548c\u539f\u578b\u94fe\uff1f<\/strong>
    \n\u539f\u578b\u548c\u539f\u578b\u94fe\u662f JavaScript \u4e2d\u7684\u91cd\u8981\u6982\u5ff5\u4e4b\u4e00\u3002\u5728\u9762\u8bd5\u4e2d\uff0c\u5019\u9009\u4eba\u53ef\u80fd\u4f1a\u88ab\u8981\u6c42\u89e3\u91ca\u539f\u578b\u548c\u539f\u578b\u94fe\u7684\u6982\u5ff5\u3001\u539f\u578b\u7ee7\u627f\u7684\u5b9e\u73b0\u65b9\u5f0f\u548c\u4f18\u7f3a\u70b9\u3002\u5019\u9009\u4eba\u53ef\u4ee5\u901a\u8fc7\u7528\u4ee3\u7801\u793a\u4f8b\u548c\u56fe\u793a\u89e3\u91ca\u539f\u578b\u548c\u539f\u578b\u94fe\u7684\u5173\u7cfb\uff0c\u4ee5\u5c55\u793a\u4ed6\u4eec\u5bf9 JavaScript \u5bf9\u8c61\u548c\u7ee7\u627f\u673a\u5236\u7684\u7406\u89e3\u3002<\/p>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"\u7ecf\u5178\u7684JavaScript\u9762\u8bd5\u9898\u6db5\u76d6\u4e86\u4ece\u57fa\u7840\u5230\u8fdb\u9636\u7684\u591a\u4e2a\u65b9\u9762\uff0c\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\u95ed\u5305\u3001\u539f\u578b\u94fe\u3001\u4e8b\u4ef6\u5faa\u73af\u3001\u4f5c\u7528\u57df\u3001\u5f02\u6b65 […]","protected":false},"author":3,"featured_media":161063,"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\/161057"}],"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=161057"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/161057\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/161063"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=161057"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=161057"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=161057"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}