{"id":165955,"date":"2024-05-08T15:27:01","date_gmt":"2024-05-08T07:27:01","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/165955.html"},"modified":"2024-05-08T15:27:06","modified_gmt":"2024-05-08T07:27:06","slug":"javascript%e4%b8%ad%e5%af%b9-function-%e7%9a%84%e5%8f%82%e6%95%b0%e8%bf%9b%e8%a1%8c%e9%87%8d%e6%96%b0%e8%b5%8b%e5%80%bc%e7%9a%84%e5%bd%b1%e5%93%8d","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/165955.html","title":{"rendered":"JavaScript\u4e2d\u5bf9 function \u7684\u53c2\u6570\u8fdb\u884c\u91cd\u65b0\u8d4b\u503c\u7684\u5f71\u54cd"},"content":{"rendered":"

\"JavaScript\u4e2d\u5bf9<\/p>\n

\u5728JavaScript\u4e2d\uff0c\u5bf9function\u7684\u53c2\u6570\u8fdb\u884c\u91cd\u65b0\u8d4b\u503c\u53ef\u80fd\u4f1a\u5f71\u54cd\u51fd\u6570\u7684\u53ef\u8bfb\u6027\u3001\u8c03\u8bd5\u96be\u5ea6\u3001\u5185\u5b58\u6d88\u8017\u548c\u6027\u80fd\u5f00\u9500\u3002<\/strong> \u8fd9\u5176\u4e2d\u5c24\u5176\u503c\u5f97\u6ce8\u610f\u7684\u662f\u8c03\u8bd5\u96be\u5ea6<\/strong>\u3002\u5f53\u51fd\u6570\u4f53\u5185\u90e8\u5bf9\u53c2\u6570\u8fdb\u884c\u4e86\u91cd\u8d4b\u503c\u6216\u4fee\u6539\uff0c\u5982\u679c\u4ee3\u7801\u8f83\u4e3a\u590d\u6742\uff0c\u8fd9\u5c06\u4f7f\u5f97\u8ffd\u8e2a\u53c2\u6570\u7684\u503c\u53d8\u5f97\u66f4\u52a0\u56f0\u96be\uff0c\u5c24\u5176\u662f\u5728\u51fd\u6570\u8c03\u7528\u8fc7\u7a0b\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u82b1\u8d39\u66f4\u591a\u7684\u65f6\u95f4\u6765\u4e86\u89e3\u53c2\u6570\u662f\u5982\u4f55\u88ab\u4fee\u6539\u7684\uff0c\u4ee5\u53ca\u5b83\u662f\u5982\u4f55\u5f71\u54cd\u5230\u51fd\u6570\u5185\u90e8\u903b\u8f91\u7684\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u53ef\u8bfb\u6027<\/h3>\n<\/p>\n

\u5bf9function\u7684\u53c2\u6570\u91cd\u65b0\u8d4b\u503c\uff0c\u5c24\u5176\u662f\u5728\u51fd\u6570\u4f53\u8f83\u957f\u6216\u903b\u8f91\u8f83\u590d\u6742\u7684\u60c5\u51b5\u4e0b\uff0c\u4f1a\u4e25\u91cd\u5f71\u54cd\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3002\u521d\u59cb\u53c2\u6570\u7684\u503c\u5728\u8fdb\u5165\u51fd\u6570\u4f53\u540e\u88ab\u66f4\u6539\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8bfb\u4ee3\u7801\u7684\u4eba\u96be\u4ee5\u8ffd\u8e2a\u53c2\u6570\u7684\u53d8\u5316\uff0c\u5c24\u5176\u662f\u5f53\u51fd\u6570\u4f9d\u8d56\u4e8e\u8fd9\u4e9b\u53c2\u6570\u6765\u6267\u884c\u903b\u8f91\u65f6\u3002\u7406\u6e05\u53c2\u6570\u503c\u7684\u53d8\u5316\u9700\u8981\u82b1\u8d39\u989d\u5916\u7684\u7cbe\u529b\uff0c\u4ece\u800c\u589e\u52a0\u4e86\u4ee3\u7801\u7ef4\u62a4\u7684\u96be\u5ea6\u3002<\/p>\n<\/p>\n

\u4e8c\u3001\u8c03\u8bd5\u96be\u5ea6<\/h3>\n<\/p>\n

\u5f53\u53c2\u6570\u5728\u51fd\u6570\u4f53\u5185\u88ab\u91cd\u65b0\u8d4b\u503c\uff0c\u5c24\u5176\u662f\u5728\u6709\u591a\u4e2a\u5730\u65b9\u5bf9\u5176\u8fdb\u884c\u4fee\u6539\u65f6\uff0c\u8ddf\u8e2a\u53c2\u6570\u503c\u7684\u53d8\u5316\u53d8\u5f97\u5f02\u5e38\u56f0\u96be\u3002\u8fd9\u79cd\u60c5\u51b5\u5728\u9047\u5230bug\u65f6\u5c24\u4e3a\u7a81\u51fa\uff0c\u56e0\u4e3a\u5f00\u53d1\u8005\u9700\u8981\u786e\u5b9a\u53c2\u6570\u5728\u54ea\u91cc\u3001\u5982\u4f55\u88ab\u4fee\u6539\uff0c\u624d\u80fd\u7406\u89e3\u95ee\u9898\u6240\u5728\uff0c\u8fdb\u800c\u4fee\u590dbug\u3002\u8fd9\u79cd\u989d\u5916\u7684\u8ddf\u8e2a\u53d8\u5316\u7684\u8d1f\u62c5\uff0c\u663e\u8457\u589e\u52a0\u4e86\u8c03\u8bd5\u7684\u96be\u5ea6\u3002<\/strong><\/p>\n<\/p>\n

\u4e09\u3001\u6027\u80fd\u5f00\u9500<\/h3>\n<\/p>\n

\u4ece\u6027\u80fd\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u51fd\u6570\u53c2\u6570\u7684\u91cd\u65b0\u8d4b\u503c\u53ef\u80fd\u4f1a\u5bfc\u81f4JavaScript\u5f15\u64ce\u505a\u51fa\u4e0d\u5fc5\u8981\u7684\u4f18\u5316\u6216\u8005\u662f\u4f18\u5316\u5931\u6548\u3002\u73b0\u4ee3JavaScript\u5f15\u64ce\u91c7\u7528\u4e86\u9ad8\u7ea7\u7684\u4f18\u5316\u6280\u672f\u5982\u5185\u8054\u7f13\u5b58\u6765\u4f18\u5316\u5bf9\u5bf9\u8c61\u5c5e\u6027\u7684\u8bbf\u95ee\uff0c\u800c\u51fd\u6570\u53c2\u6570\u7684\u91cd\u65b0\u8d4b\u503c\u53ef\u80fd\u4f1a\u963b\u788d\u8fd9\u4e9b\u4f18\u5316\u6280\u672f\u7684\u5e94\u7528\u3002\u867d\u7136\u5728\u8bb8\u591a\u60c5\u51b5\u4e0b\uff0c\u8fd9\u79cd\u6027\u80fd\u5dee\u5f02\u5fae\u4e0d\u8db3\u9053\uff0c\u4f46\u5728\u6027\u80fd\u654f\u611f\u7684\u5e94\u7528\u4e2d\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u53c2\u6570\u91cd\u65b0\u8d4b\u503c\u53ef\u4ee5\u6539\u5584\u6574\u4f53\u6027\u80fd\u3002<\/p>\n<\/p>\n

\u56db\u3001\u5185\u5b58\u6d88\u8017<\/h3>\n<\/p>\n

\u5bf9\u4e8e\u539f\u59cb\u6570\u636e\u7c7b\u578b\uff08\u5982\u6570\u503c\u3001\u5e03\u5c14\u503c\uff09\u7684\u53c2\u6570\u91cd\u65b0\u8d4b\u503c\uff0c\u5f71\u54cd\u76f8\u5bf9\u8f83\u5c0f\u3002\u4f46\u5bf9\u4e8e\u5bf9\u8c61\u6216\u8005\u6570\u7ec4\u8fd9\u6837\u7684\u5f15\u7528\u7c7b\u578b\uff0c\u91cd\u65b0\u8d4b\u503c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e0d\u5fc5\u8981\u7684\u5185\u5b58\u6d88\u8017\u3002\u5728JavaScript\u4e2d\uff0c\u5bf9\u8c61\u548c\u6570\u7ec4\u662f\u901a\u8fc7\u5f15\u7528\u4f20\u9012\u7684\uff0c\u5f53\u4f60\u5bf9\u8fd9\u6837\u7684\u53c2\u6570\u8fdb\u884c\u4fee\u6539\u65f6\uff0c\u5982\u679c\u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61\u6216\u6570\u7ec4\u66ff\u4ee3\u539f\u6709\u53c2\u6570\uff0c\u90a3\u4e48\u539f\u6709\u5bf9\u8c61\u6216\u6570\u7ec4\u53ef\u80fd\u4ecd\u7136\u4fdd\u7559\u5728\u5185\u5b58\u4e2d\uff0c\u4ece\u800c\u589e\u52a0\u4e86\u5185\u5b58\u6d88\u8017\u3002\u5c24\u5176\u662f\u5728\u5faa\u73af\u6216\u5927\u91cf\u8ba1\u7b97\u4e2d\uff0c\u8fd9\u79cd\u5f71\u54cd\u66f4\u52a0\u663e\u8457\u3002<\/p>\n<\/p>\n

\u4e94\u3001\u907f\u514d\u91cd\u8d4b\u503c\u7684\u7b56\u7565<\/h3>\n<\/p>\n

\u4e3a\u4e86\u89c4\u907f\u8fd9\u4e9b\u7531\u4e8e\u53c2\u6570\u91cd\u65b0\u8d4b\u503c\u5e26\u6765\u7684\u95ee\u9898\uff0c\u53ef\u4ee5\u91c7\u53d6\u4ee5\u4e0b\u51e0\u79cd\u7b56\u7565\uff1a<\/p>\n<\/p>\n

    \n
  1. \u4f7f\u7528\u4e34\u65f6\u53d8\u91cf<\/strong>\uff1a\u800c\u4e0d\u662f\u76f4\u63a5\u4fee\u6539\u51fd\u6570\u7684\u53c2\u6570\uff0c\u53ef\u4ee5\u5728\u51fd\u6570\u4f53\u5185\u90e8\u521b\u5efa\u4e34\u65f6\u53d8\u91cf\u6765\u8fdb\u884c\u8ba1\u7b97\u548c\u5b58\u50a8\u4e2d\u95f4\u7ed3\u679c\u3002<\/li>\n
  2. \u4e0d\u53d8\u6027\uff08Immutable\uff09<\/strong>\uff1a\u5c3d\u91cf\u4fdd\u8bc1\u6570\u636e\u7684\u4e0d\u53d8\uff0c\u7279\u522b\u662f\u5bf9\u4e8e\u5bf9\u8c61\u548c\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u8bf8\u5982Object.freeze\u7b49\u65b9\u5f0f\u6765\u9632\u6b62\u5bf9\u8c61\u88ab\u4fee\u6539\u3002<\/li>\n
  3. \u51fd\u6570\u5f0f\u7f16\u7a0b<\/strong>\uff1a\u91c7\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u5f0f\uff0c\u907f\u514d\u526f\u4f5c\u7528\u548c\u72b6\u6001\u7684\u6539\u53d8\u3002\u8fd9\u6837\u53ef\u4ee5\u4fdd\u6301\u51fd\u6570\u7684\u7eaf\u7cb9\u6027\uff0c\u4f7f\u5f97\u51fd\u6570\u66f4\u5bb9\u6613\u7406\u89e3\u548c\u6d4b\u8bd5\u3002<\/li>\n
  4. \u660e\u786e\u6587\u6863\u8bf4\u660e<\/strong>\uff1a\u5982\u679c\u786e\u5b9e\u9700\u8981\u4fee\u6539\u53c2\u6570\u7684\u503c\uff0c\u53ef\u4ee5\u5728\u51fd\u6570\u8bf4\u660e\u6587\u6863\u4e2d\u660e\u786e\u6307\u51fa\u8be5\u884c\u4e3a\uff0c\u4ee5\u4fbf\u4e8e\u5176\u4ed6\u5f00\u53d1\u8005\u7406\u89e3\u548c\u4f7f\u7528\u3002<\/li>\n<\/ol>\n

    \u7efc\u4e0a\u6240\u8ff0\uff0c\u867d\u7136JavaScript\u5141\u8bb8\u5bf9function\u7684\u53c2\u6570\u8fdb\u884c\u91cd\u65b0\u8d4b\u503c\uff0c\u4f46\u4ece\u53ef\u8bfb\u6027\u3001\u8c03\u8bd5\u96be\u5ea6\u3001\u6027\u80fd\u5f00\u9500\u548c\u5185\u5b58\u6d88\u8017\u56db\u4e2a\u7ef4\u5ea6\u8003\u8651\uff0c\u5e94\u5f53\u5c3d\u91cf\u907f\u514d\u8fd9\u79cd\u505a\u6cd5\u3002\u91c7\u53d6\u9002\u5f53\u7684\u7f16\u7801\u7b56\u7565\u548c\u8303\u5f0f\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u7f16\u5199\u51fa\u65e2\u9ad8\u6548\u53c8\u5bb9\u6613\u7ef4\u62a4\u7684\u4ee3\u7801\u3002<\/p>\n<\/p>\n

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

    1. JavaScript\u4e2d\u5bf9 function\u53c2\u6570\u8fdb\u884c\u91cd\u65b0\u8d4b\u503c\u4f1a\u5bf9\u539f\u59cb\u503c\u6709\u4f55\u5f71\u54cd\uff1f<\/strong><\/p>\n

    \u91cd\u65b0\u8d4b\u503c\u51fd\u6570\u4e2d\u7684\u53c2\u6570\u4f1a\u6539\u53d8\u53c2\u6570\u7684\u539f\u59cb\u503c\u3002\u7531\u4e8eJavaScript\u4e2d\u7684\u51fd\u6570\u53c2\u6570\u662f\u6309\u503c\u4f20\u9012\u7684\uff0c\u800c\u4e0d\u662f\u6309\u5f15\u7528\u4f20\u9012\u7684\uff0c\u6240\u4ee5\u5728\u51fd\u6570\u5185\u90e8\u91cd\u65b0\u8d4b\u503c\u53c2\u6570\u5c06\u4e0d\u4f1a\u5bf9\u51fd\u6570\u5916\u90e8\u7684\u53d8\u91cf\u4ea7\u751f\u5f71\u54cd\u3002\u8fd9\u610f\u5473\u7740\u5728\u51fd\u6570\u5185\u90e8\u5bf9\u53c2\u6570\u8fdb\u884c\u91cd\u65b0\u8d4b\u503c\u53ea\u4f1a\u4fee\u6539\u51fd\u6570\u5185\u90e8\u7684\u53d8\u91cf\uff0c\u800c\u4e0d\u4f1a\u5f71\u54cd\u5916\u90e8\u7684\u53d8\u91cf\u3002<\/p>\n

    2. \u5982\u4f55\u5728 JavaScript\u51fd\u6570\u4e2d\u907f\u514d\u5bf9\u53c2\u6570\u8fdb\u884c\u91cd\u65b0\u8d4b\u503c\uff1f<\/strong><\/p>\n

    \u4e3a\u4e86\u907f\u514d\u5728\u51fd\u6570\u5185\u90e8\u5bf9\u53c2\u6570\u8fdb\u884c\u91cd\u65b0\u8d4b\u503c\uff0c\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u53d8\u91cf\u6765\u5b58\u50a8\u53c2\u6570\u7684\u503c\u3002\u53ef\u4ee5\u4f7f\u7528\u89e3\u6784\u8d4b\u503c\u8bed\u6cd5\u6765\u5c06\u53c2\u6570\u503c\u590d\u5236\u5230\u4e00\u4e2a\u65b0\u7684\u53d8\u91cf\u4e2d\uff0c\u7136\u540e\u5728\u51fd\u6570\u5185\u90e8\u4f7f\u7528\u65b0\u7684\u53d8\u91cf\u6765\u8fdb\u884c\u64cd\u4f5c\uff0c\u800c\u4e0d\u662f\u76f4\u63a5\u64cd\u4f5c\u53c2\u6570\u3002<\/p>\n

    function myFunction(param) {\n  let newParam = param; \/\/ \u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u53d8\u91cf\u6765\u5b58\u50a8\u53c2\u6570\u7684\u503c\n  \/\/ \u5728\u6b64\u5904\u5bf9 newParam \u8fdb\u884c\u5176\u4ed6\u64cd\u4f5c\uff0c\u800c\u4e0d\u662f\u76f4\u63a5\u64cd\u4f5c param\n}\n<\/code><\/pre>\n
    3. JavaScript\u4e2d\u662f\u5426\u53ef\u4ee5\u901a\u8fc7\u91cd\u65b0\u8d4b\u503c\u53c2\u6570\u6765\u4fee\u6539\u4f20\u9012\u7ed9\u51fd\u6570\u7684\u53d8\u91cf\uff1f<\/strong><\/p>\n
    \u867d\u7136\u5728 JavaScript\u4e2d\u5bf9\u53c2\u6570\u8fdb\u884c\u91cd\u65b0\u8d4b\u503c\u4e0d\u4f1a\u5f71\u54cd\u4f20\u9012\u7ed9\u51fd\u6570\u7684\u53d8\u91cf\uff0c\u4f46\u5982\u679c\u4f20\u9012\u7ed9\u51fd\u6570\u7684\u53d8\u91cf\u662f\u4e00\u4e2a\u5f15\u7528\u7c7b\u578b\uff08\u5982\u5bf9\u8c61\u6216\u6570\u7ec4\uff09\uff0c\u5219\u53ef\u4ee5\u5728\u51fd\u6570\u5185\u90e8\u4fee\u6539\u5f15\u7528\u7c7b\u578b\u7684\u5c5e\u6027\u6216\u5143\u7d20\u3002\u56e0\u4e3a\u5f15\u7528\u7c7b\u578b\u7684\u4f20\u9012\u662f\u6309\u5f15\u7528\u4f20\u9012\u7684\uff0c\u6240\u4ee5\u4efb\u4f55\u5bf9\u5f15\u7528\u7c7b\u578b\u7684\u5c5e\u6027\u6216\u5143\u7d20\u7684\u4fee\u6539\u90fd\u4f1a\u5f71\u54cd\u4f20\u9012\u7ed9\u51fd\u6570\u7684\u53d8\u91cf\u3002<\/p>\n
    let obj = { name: "John" };\n\nfunction modifyObject(param) {\n  param.name = "Jane"; \/\/ \u4fee\u6539\u5bf9\u8c61\u7684\u5c5e\u6027\n}\n\nmodifyObject(obj);\nconsole.log(obj.name); \/\/ \u8f93\u51fa "Jane"\n\nlet arr = [1, 2, 3];\n\nfunction modifyArray(param) {\n  param.push(4); \/\/ \u4fee\u6539\u6570\u7ec4\u7684\u5143\u7d20\n}\n\nmodifyArray(arr);\nconsole.log(arr); \/\/ \u8f93\u51fa [1, 2, 3, 4]\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u5728JavaScript\u4e2d\uff0c\u5bf9function\u7684\u53c2\u6570\u8fdb\u884c\u91cd\u65b0\u8d4b\u503c\u53ef\u80fd\u4f1a\u5f71\u54cd\u51fd\u6570\u7684\u53ef\u8bfb\u6027\u3001\u8c03\u8bd5\u96be\u5ea6\u3001\u5185\u5b58\u6d88\u8017\u548c\u6027\u80fd […]","protected":false},"author":3,"featured_media":165964,"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\/165955"}],"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=165955"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/165955\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/165964"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=165955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=165955"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=165955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}