{"id":153390,"date":"2024-05-08T11:14:20","date_gmt":"2024-05-08T03:14:20","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/153390.html"},"modified":"2024-05-08T11:14:30","modified_gmt":"2024-05-08T03:14:30","slug":"%e8%bf%99%e6%a0%b7%e7%90%86%e8%a7%a3javascript%e4%b8%ad%e5%87%bd%e6%95%b0return%e5%af%b9%e4%b8%8d%e5%af%b9","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/153390.html","title":{"rendered":"\u8fd9\u6837\u7406\u89e3javascript\u4e2d\u51fd\u6570return\u5bf9\u4e0d\u5bf9"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/27151633\/653295e2-8e78-4c2c-be60-0d19a9930998.webp\" alt=\"\u8fd9\u6837\u7406\u89e3javascript\u4e2d\u51fd\u6570return\u5bf9\u4e0d\u5bf9\" \/><\/p>\n<p><p>\u7406\u89e3JavaScript\u4e2d\u51fd\u6570\u7684<code>return<\/code>\u8bed\u53e5\u662f\u5426\u6b63\u786e\uff0c\u5173\u952e\u5728\u4e8e\u628a\u63e1\u5176\u57fa\u672c\u7528\u9014\u548c\u884c\u4e3a\u6a21\u5f0f\u3002<strong>\u51fd\u6570\u7684<code>return<\/code>\u8bed\u53e5\u4e3b\u8981\u6709\u4e24\u4e2a\u4f5c\u7528\uff1a\u7ed3\u675f\u51fd\u6570\u7684\u6267\u884c\u3001\u5e76\u6307\u5b9a\u51fd\u6570\u7684\u8fd4\u56de\u503c<\/strong>\u3002\u8fd9\u610f\u5473\u7740\u5f53<code>return<\/code>\u8bed\u53e5\u6267\u884c\u65f6\uff0c\u51fd\u6570\u4f1a\u7acb\u5373\u505c\u6b62\u5f53\u524d\u7684\u6267\u884c\u6d41\u7a0b\uff0c\u8fd4\u56de\u6307\u5b9a\u7684\u503c\u7ed9\u51fd\u6570\u8c03\u7528\u8005\u3002\u5982\u679c\u6ca1\u6709\u660e\u786e\u6307\u5b9a\u8fd4\u56de\u503c\uff0c\u51fd\u6570\u4f1a\u9ed8\u8ba4\u8fd4\u56de<code>undefined<\/code>\u3002<\/p>\n<\/p>\n<p><p><strong>\u6df1\u5165\u7406\u89e3\u8fd4\u56de\u503c\u7684\u884c\u4e3a<\/strong>\u5bf9\u4e8e\u9ad8\u6548\u5229\u7528<code>return<\/code>\u8bed\u53e5\u5c24\u4e3a\u91cd\u8981\u3002\u51fd\u6570\u7684\u8fd4\u56de\u503c\u4e0d\u4ec5\u53ef\u4ee5\u662f\u57fa\u7840\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5982\u6570\u5b57\u3001\u5b57\u7b26\u4e32\u7b49\uff0c\u4e5f\u53ef\u4ee5\u662f\u590d\u6742\u6570\u636e\u7c7b\u578b\uff0c\u4f8b\u5982\u5bf9\u8c61\u6216\u5176\u4ed6\u51fd\u6570\u3002\u8fd9\u4e00\u7279\u6027\u6781\u5927\u5730\u62d3\u5c55\u4e86<code>return<\/code>\u8bed\u53e5\u5728JavaScript\u51fd\u6570\u7f16\u7a0b\u4e2d\u7684\u5e94\u7528\u8303\u56f4\uff0c\u4ece\u800c\u4f7f\u5f97\u51fd\u6570\u53ef\u4ee5\u4f5c\u4e3a\u5176\u4ed6\u51fd\u6570\u7684\u6784\u5efa\u5757\uff0c\u652f\u6301\u6a21\u5757\u5316\u548c\u9ad8\u5ea6\u590d\u6742\u7684\u7f16\u7a0b\u7ed3\u6784\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001RETURN\u8bed\u53e5\u7684\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n<p><p>\u5728JavaScript\u4e2d\uff0c<code>return<\/code>\u8bed\u53e5\u901a\u5e38\u7528\u4e8e\u4e24\u5927\u573a\u666f\uff1a\u4e00\u662f\u63d0\u524d\u9000\u51fa\u51fd\u6570\uff0c\u4e8c\u662f\u56de\u4f20\u51fd\u6570\u6267\u884c\u7ed3\u679c\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>\u63d0\u524d\u9000\u51fa\u51fd\u6570<\/strong>\u662f\u4e00\u79cd\u5e38\u89c1\u9700\u6c42\uff0c\u7279\u522b\u662f\u5728\u6761\u4ef6\u4e0d\u6ee1\u8db3\u65f6\u907f\u514d\u6267\u884c\u66f4\u591a\u7684\u903b\u8f91\u3002\u4f8b\u5982\uff0c\u5f53\u4e00\u4e2a\u51fd\u6570\u8d1f\u8d23\u5904\u7406\u8f93\u5165\u6570\u636e\u65f6\uff0c\u5982\u679c\u8f93\u5165\u6570\u636e\u4e0d\u7b26\u5408\u9884\u671f\u683c\u5f0f\uff0c\u901a\u8fc7<code>return<\/code>\u8bed\u53e5\u76f4\u63a5\u8fd4\u56de\u9519\u8bef\u6216\u7279\u5b9a\u7684\u63d0\u793a\u4fe1\u606f\uff0c\u53ef\u4ee5\u7b80\u5316\u4ee3\u7801\u903b\u8f91\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u5b89\u5168\u6027\u3002<\/li>\n<li><strong>\u56de\u4f20\u6267\u884c\u7ed3\u679c<\/strong>\u5219\u662f<code>return<\/code>\u8bed\u53e5\u7684\u6838\u5fc3\u529f\u80fd\u3002\u5728\u51fd\u6570\u5904\u7406\u6570\u636e\u6216\u6267\u884c\u8ba1\u7b97\u540e\uff0c\u901a\u8fc7<code>return<\/code>\u8bed\u53e5\u5c06\u7ed3\u679c\u8fd4\u56de\u7ed9\u8c03\u7528\u8005\uff0c\u4f7f\u5f97\u51fd\u6570\u8c03\u7528\u53ef\u4ee5\u878d\u5165\u5230\u66f4\u5927\u7684\u7a0b\u5e8f\u903b\u8f91\u4e2d\u3002\u8fd9\u79cd\u65b9\u5f0f\u5728\u7f16\u5199\u6570\u5b66\u8fd0\u7b97\u3001\u6570\u636e\u5904\u7406\u7b49\u903b\u8f91\u65f6\u5c24\u4e3a\u91cd\u8981\u3002<\/li>\n<\/ul>\n<p><h3>\u4e8c\u3001\u7406\u89e3RETURN\u8bed\u53e5\u7684\u6267\u884c\u6d41<\/h3>\n<\/p>\n<p><p><code>return<\/code>\u8bed\u53e5\u4e0d\u4ec5\u5f71\u54cd\u7740\u51fd\u6570\u7684\u8fd4\u56de\u503c\uff0c\u4e5f\u63a7\u5236\u7740\u51fd\u6570\u7684\u6267\u884c\u6d41\u7a0b\u3002\u7406\u89e3\u8fd9\u4e00\u70b9\u5bf9\u4e8e\u7f16\u5199\u53ef\u63a7\u548c\u9ad8\u6548\u7684\u51fd\u6570\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>\u63a7\u5236\u6267\u884c\u6d41<\/strong>\u610f\u5473\u7740\uff0c\u4e00\u65e6\u6267\u884c\u5230<code>return<\/code>\u8bed\u53e5\uff0c\u5f53\u524d\u51fd\u6570\u7684\u5269\u4f59\u4ee3\u7801\u5c06\u4e0d\u4f1a\u6267\u884c\u3002\u8fd9\u4e00\u7279\u6027\u53ef\u4ee5\u7528\u6765\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u8ba1\u7b97\u548c\u64cd\u4f5c\uff0c\u4f18\u5316\u7a0b\u5e8f\u6027\u80fd\u3002\u4f46\u4e5f\u9700\u8981\u8c28\u614e\u5904\u7406\uff0c\u786e\u4fdd\u4e0d\u4f1a\u610f\u5916\u8df3\u8fc7\u5173\u952e\u7684\u903b\u8f91\u5904\u7406\u3002<\/li>\n<li>\u53e6\u5916\uff0c<strong>\u5229\u7528\u8fd4\u56de\u503c\u6d41\u8f6c\u6570\u636e<\/strong>\uff0c\u53ef\u4ee5\u5c06\u51fd\u6570\u770b\u4f5c\u662f\u6570\u636e\u5904\u7406\u7684\u5355\u5143\uff0c\u901a\u8fc7<code>return<\/code>\u8bed\u53e5\u4f20\u9012\u6570\u636e\u3002\u8fd9\u79cd\u65b9\u5f0f\u5728\u5904\u7406\u94fe\u5f0f\u8c03\u7528\u3001\u51fd\u6570\u7ec4\u5408\u65f6\u7279\u522b\u6709\u7528\uff0c\u4e3a\u7f16\u5199\u9ad8\u5ea6\u590d\u5408\u7684\u903b\u8f91\u63d0\u4f9b\u4e86\u4fbf\u5229\u3002<\/li>\n<\/ul>\n<p><h3>\u4e09\u3001RETURN\u8bed\u53e5\u7684\u9ad8\u7ea7\u7528\u9014<\/h3>\n<\/p>\n<p><p>\u968f\u7740JavaScript\u8bed\u8a00\u548c\u5e94\u7528\u573a\u666f\u7684\u53d1\u5c55\uff0c<code>return<\/code>\u8bed\u53e5\u5728\u9ad8\u7ea7\u7f16\u7a0b\u6a21\u5f0f\u4e2d\u626e\u6f14\u7740\u8d8a\u6765\u8d8a\u91cd\u8981\u7684\u89d2\u8272\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>\u652f\u6491\u95ed\u5305\u548c\u9ad8\u9636\u51fd\u6570<\/strong>\uff1a\u5728JavaScript\u4e2d\uff0c\u51fd\u6570\u53ef\u4ee5\u5d4c\u5957\u5b9a\u4e49\u3002\u5185\u90e8\u51fd\u6570\u53ef\u4ee5\u8bbf\u95ee\u5e76\u8fd4\u56de\u5916\u90e8\u51fd\u6570\u7684\u5c40\u90e8\u53d8\u91cf\uff0c\u5f62\u6210\u95ed\u5305\uff08Closure\uff09\u3002\u7ed3\u5408<code>return<\/code>\u8bed\u53e5\uff0c\u95ed\u5305\u673a\u5236\u53ef\u4ee5\u7528\u6765\u5c01\u88c5\u548c\u4fdd\u62a4\u53d8\u91cf\uff0c\u63d0\u4f9b\u6a21\u5757\u5316\u7f16\u7a0b\u7684\u80fd\u529b\u3002<\/li>\n<li><strong>\u542f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b<\/strong>\uff1aJavaScript\u7684\u51fd\u6570\u662f\u4e00\u7b49\u516c\u6c11\uff0c\u610f\u5473\u7740\u5b83\u4eec\u53ef\u4ee5\u50cf\u4efb\u4f55\u5176\u4ed6\u503c\u4e00\u6837\u88ab\u8fd4\u56de\u548c\u4f20\u9012\u3002\u901a\u8fc7<code>return<\/code>\u8fd4\u56de\u51fd\u6570\uff0c\u53ef\u4ee5\u521b\u5efa\u590d\u6742\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u6a21\u5f0f\uff0c\u5982\u67ef\u91cc\u5316\uff08Currying\uff09\u3001\u7ec4\u5408\uff08Composition\uff09\u7b49\uff0c\u6781\u5927\u5730\u63d0\u5347\u4ee3\u7801\u7684\u590d\u7528\u6027\u548c\u8868\u8fbe\u529b\u3002<\/li>\n<\/ul>\n<p><h3>\u56db\u3001RETURN\u8bed\u53e5\u7684\u5e38\u89c1\u8bef\u533a\u548c\u6ce8\u610f\u4e8b\u9879<\/h3>\n<\/p>\n<p><p>\u4f7f\u7528<code>return<\/code>\u8bed\u53e5\u65f6\uff0c\u9700\u8981\u907f\u514d\u4e00\u4e9b\u5e38\u89c1\u8bef\u533a\u548c\u6ce8\u610f\u4e00\u4e9b\u7ec6\u8282\uff0c\u4ee5\u786e\u4fdd\u4ee3\u7801\u7684\u6b63\u786e\u6027\u548c\u6e05\u6670\u6027\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>\u660e\u786e\u6307\u5b9a\u8fd4\u56de\u503c<\/strong>\uff1a\u867d\u7136\u6ca1\u6709<code>return<\/code>\u8bed\u53e5\uff0c\u51fd\u6570\u4f1a\u9ed8\u8ba4\u8fd4\u56de<code>undefined<\/code>\uff0c\u4f46\u660e\u786e\u6307\u5b9a\u8fd4\u56de\u503c\u53ef\u4ee5\u589e\u5f3a\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u610f\u56fe\u3002<\/li>\n<li><strong>\u6ce8\u610f\u5206\u53f7\u7684\u81ea\u52a8\u63d2\u5165\u673a\u5236<\/strong>\uff08Automatic Semicolon Insertion, ASI\uff09\uff1a\u5728<code>return<\/code>\u8bed\u53e5\u540e\u9519\u8bef\u5730\u6362\u884c\u53ef\u80fd\u4f1a\u5bfc\u81f4JavaScript\u5f15\u64ce\u9519\u8bef\u5730\u63d2\u5165\u5206\u53f7\uff0c\u5bfc\u81f4\u51fd\u6570\u610f\u5916\u8fd4\u56de<code>undefined<\/code>\u3002<\/li>\n<\/ul>\n<p><p>\u7efc\u4e0a\u6240\u8ff0\uff0c\u7406\u89e3\u5e76\u6b63\u786e\u4f7f\u7528JavaScript\u4e2d\u7684<code>return<\/code>\u8bed\u53e5\uff0c\u5bf9\u4e8e\u7f16\u5199\u9ad8\u6548\u3001\u6e05\u6670\u3001\u53ef\u7ef4\u62a4\u7684\u4ee3\u7801\u81f3\u5173\u91cd\u8981\u3002\u901a\u8fc7\u638c\u63e1\u5176\u57fa\u672c\u7528\u6cd5\u3001\u6267\u884c\u6d41\u7a0b\u3001\u4ee5\u53ca\u5728\u9ad8\u7ea7\u7f16\u7a0b\u6a21\u5f0f\u4e2d\u7684\u5e94\u7528\uff0c\u5e76\u6ce8\u610f\u907f\u514d\u5e38\u89c1\u7684\u9519\u8bef\uff0c\u53ef\u4ee5\u5145\u5206\u5229\u7528<code>return<\/code>\u8bed\u53e5\u7684\u5f3a\u5927\u529f\u80fd\uff0c\u63d0\u5347\u7f16\u7a0b\u6280\u5de7\u548c\u4ee3\u7801\u8d28\u91cf\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>1. JavaScript\u4e2d\u7684\u51fd\u6570return\u6709\u4ec0\u4e48\u4f5c\u7528\uff1f<\/strong><\/p>\n<p>\u5728JavaScript\u4e2d\uff0c\u51fd\u6570\u7684return\u5173\u952e\u5b57\u7528\u4e8e\u5c06\u51fd\u6570\u6267\u884c\u7684\u7ed3\u679c\u8fd4\u56de\u7ed9\u8c03\u7528\u8be5\u51fd\u6570\u7684\u5730\u65b9\u3002\u901a\u8fc7return\u8bed\u53e5\uff0c\u51fd\u6570\u53ef\u4ee5\u8fd4\u56de\u5404\u79cd\u4e0d\u540c\u7c7b\u578b\u7684\u503c\uff0c\u5305\u62ec\u6570\u5b57\u3001\u5b57\u7b26\u4e32\u3001\u5e03\u5c14\u503c\u3001\u5bf9\u8c61\u7b49\u7b49\u3002\u8fd9\u6837\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u51fd\u6570\u5185\u90e8\u8fdb\u884c\u4e00\u4e9b\u8ba1\u7b97\u6216\u5904\u7406\uff0c\u7136\u540e\u5c06\u7ed3\u679c\u8fd4\u56de\u7ed9\u8c03\u7528\u8005\uff0c\u4ee5\u4fbf\u540e\u7eed\u7684\u64cd\u4f5c\u6216\u4f7f\u7528\u3002<\/p>\n<p><strong>2. \u4e3a\u4ec0\u4e48\u5728JavaScript\u4e2d\u5f88\u91cd\u8981\u7406\u89e3\u51fd\u6570return\u7684\u7528\u6cd5\uff1f<\/strong><\/p>\n<p>\u7406\u89e3\u51fd\u6570return\u7684\u7528\u6cd5\u5bf9\u4e8e\u7f16\u5199\u9ad8\u8d28\u91cf\u7684JavaScript\u4ee3\u7801\u81f3\u5173\u91cd\u8981\u3002\u901a\u8fc7\u5408\u7406\u4f7f\u7528return\u8bed\u53e5\uff0c\u6211\u4eec\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3001\u53ef\u7ef4\u62a4\u6027\u548c\u6269\u5c55\u6027\u3002\u8fd4\u56de\u6070\u5f53\u7684\u503c\u5e76\u5c06\u5176\u5b58\u50a8\u5728\u53d8\u91cf\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u4ee3\u7801\u66f4\u5177\u8868\u8fbe\u529b\uff0c\u5e76\u4e14\u66f4\u6613\u4e8e\u7406\u89e3\u51fd\u6570\u6267\u884c\u7684\u7ed3\u679c\u3002\u6b64\u5916\uff0creturn\u7684\u4f7f\u7528\u8fd8\u6709\u52a9\u4e8e\u63d0\u524d\u7ed3\u675f\u51fd\u6570\u7684\u6267\u884c\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u8ba1\u7b97\u548c\u8d44\u6e90\u6d88\u8017\u3002<\/p>\n<p><strong>3. \u4ec0\u4e48\u662f\u9690\u5f0f\u8fd4\u56de\u548c\u663e\u5f0f\u8fd4\u56de\uff1f<\/strong><\/p>\n<p>\u5728JavaScript\u4e2d\uff0c\u51fd\u6570\u53ef\u4ee5\u901a\u8fc7\u663e\u5f0freturn\u548c\u9690\u5f0freturn\u4e24\u79cd\u65b9\u5f0f\u8fd4\u56de\u503c\u3002\u663e\u5f0freturn\u6307\u7684\u662f\u4f7f\u7528return\u5173\u952e\u5b57\u660e\u786e\u5730\u8fd4\u56de\u503c\uff0c\u8fd9\u662f\u6700\u5e38\u89c1\u7684\u7528\u6cd5\u3002\u800c\u9690\u5f0freturn\u5219\u662f\u6307\u5728\u51fd\u6570\u4e2d\u6ca1\u6709\u4f7f\u7528return\u5173\u952e\u5b57\uff0c\u4f46\u6700\u540e\u4e00\u884c\u4ee3\u7801\u7684\u7ed3\u679c\u4f1a\u88ab\u81ea\u52a8\u8fd4\u56de\u3002\u8fd9\u79cd\u60c5\u51b5\u901a\u5e38\u53d1\u751f\u5728\u7bad\u5934\u51fd\u6570\u6216\u7b80\u5316\u7684\u51fd\u6570\u8868\u8fbe\u5f0f\u4e2d\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u9690\u5f0f\u8fd4\u56de\u53ea\u9002\u7528\u4e8e\u5355\u4e2a\u8868\u8fbe\u5f0f\u7684\u60c5\u51b5\uff0c\u5982\u679c\u51fd\u6570\u5185\u6709\u591a\u884c\u4ee3\u7801\uff0c\u5219\u9700\u8981\u4f7f\u7528\u663e\u5f0freturn\u6765\u6307\u5b9a\u8fd4\u56de\u503c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u7406\u89e3JavaScript\u4e2d\u51fd\u6570\u7684return\u8bed\u53e5\u662f\u5426\u6b63\u786e\uff0c\u5173\u952e\u5728\u4e8e\u628a\u63e1\u5176\u57fa\u672c\u7528\u9014\u548c\u884c\u4e3a\u6a21\u5f0f\u3002\u51fd\u6570\u7684return [&hellip;]","protected":false},"author":3,"featured_media":153414,"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\/153390"}],"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=153390"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/153390\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/153414"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=153390"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=153390"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=153390"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}