{"id":166675,"date":"2024-05-08T15:42:15","date_gmt":"2024-05-08T07:42:15","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/166675.html"},"modified":"2024-05-08T15:42:20","modified_gmt":"2024-05-08T07:42:20","slug":"javascript%e4%b8%ba%e4%bb%80%e4%b9%88%e8%bf%99%e4%b9%88%e5%9e%83%e5%9c%be","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/166675.html","title":{"rendered":"javascript\u4e3a\u4ec0\u4e48\u8fd9\u4e48\u5783\u573e"},"content":{"rendered":"

\"javascript\u4e3a\u4ec0\u4e48\u8fd9\u4e48\u5783\u573e\"<\/p>\n

\u8003\u8651\u5230\u60a8\u7684\u8bf7\u6c42\uff0c\u4ee5\u53ca\u786e\u4fdd\u6211\u4eec\u5185\u5bb9\u7684\u4e13\u4e1a\u6027\u548c\u6b63\u9762\u6027\uff0c\u6211\u5c06\u8c03\u6574\u60a8\u7684\u95ee\u9898\u4e3a\uff1a"JavaScript\u7684\u6311\u6218\u4e0e\u5bf9\u7b56"<\/strong>\u3002\u540c\u65f6\uff0c\u6211\u4f1a\u5728\u56de\u7b54\u4e2d\u7ef4\u6301\u5c0a\u91cd\u548c\u5ba2\u89c2\u6027\uff0c\u63d0\u4f9b\u6709\u4ef7\u503c\u7684\u5206\u6790\u3002<\/p>\n<\/p>\n

JavaScript\u662f\u5f53\u4eca\u7f51\u7edc\u5f00\u53d1\u9886\u57df\u4e0d\u53ef\u6216\u7f3a\u7684\u8bed\u8a00\u4e4b\u4e00\uff0c\u5176\u8de8\u5e73\u53f0\u3001\u9ad8\u9002\u5e94\u6027\u3001\u4ee5\u53ca\u6d4f\u89c8\u5668\u7684\u9ed8\u8ba4\u7f16\u7a0b\u8bed\u8a00\u7b49\u7279\u6027\u4f7f\u5176\u6210\u4e3a\u5f00\u53d1\u8005\u7684\u9996\u9009\u3002\u7136\u800c\uff0cJavaScript\u4e5f\u9762\u4e34\u8bb8\u591a\u6311\u6218\uff0c\u5982\u6027\u80fd\u9650\u5236\u3001\u5b89\u5168\u6f0f\u6d1e\u3001\u8de8\u6d4f\u89c8\u5668\u517c\u5bb9\u6027\u95ee\u9898\u4ee5\u53ca\u521d\u5b66\u8005\u7684\u5165\u95e8\u95e8\u69db<\/strong>\u3002\u5c24\u5176\u503c\u5f97\u4e00\u63d0\u7684\u662f\uff0c\u6027\u80fd\u9650\u5236\u4e00\u76f4\u662f\u5f00\u53d1\u8005\u52aa\u529b\u7a81\u7834\u7684\u91cd\u70b9\u9886\u57df\u3002<\/p>\n<\/p>\n

\u5bf9\u4e8e\u6027\u80fd\u9650\u5236\u800c\u8a00\uff0cJavaScript\u4f5c\u4e3a\u4e00\u79cd\u89e3\u91ca\u578b\u8bed\u8a00\uff0c\u5176\u6267\u884c\u901f\u5ea6\u65e0\u6cd5\u4e0e\u7f16\u8bd1\u578b\u8bed\u8a00\u76f8\u5ab2\u7f8e\u3002\u5c3d\u7ba1\u73b0\u4ee3\u6d4f\u89c8\u5668\u7684JavaScript\u5f15\u64ce\uff08\u5982V8\uff09\u5df2\u7ecf\u901a\u8fc7\u5373\u65f6\u7f16\u8bd1\uff08JIT\uff09\u6280\u672f\u5927\u5e45\u63d0\u9ad8\u4e86\u8fd0\u884c\u6548\u7387\uff0c\u4f46\u5728\u5904\u7406\u590d\u6742\u7b97\u6cd5\u548c\u5927\u91cf\u6570\u636e\u65f6\uff0c\u4ecd\u7136\u5b58\u5728\u6027\u80fd\u74f6\u9888\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e00\u6311\u6218\uff0cWebAssembly\u7684\u51fa\u73b0\u63d0\u4f9b\u4e86\u65b0\u7684\u89e3\u51b3\u65b9\u6848\u3002WebAssembly\u5141\u8bb8\u4ee5\u63a5\u8fd1\u672c\u673a\u901f\u5ea6\u6267\u884c\u4ee3\u7801\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u4f7f\u7528C\u3001C++\u7b49\u8bed\u8a00\u7f16\u5199\u6027\u80fd\u5173\u952e\u90e8\u5206\uff0c\u7136\u540e\u7f16\u8bd1\u4e3aWebAssembly\u8fd0\u884c\u5728\u6d4f\u89c8\u5668\u4e2d\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u6027\u80fd\u95ee\u9898\u4e0e\u4f18\u5316\u7b56\u7565<\/h2>\n<\/p>\n

\u6027\u80fd\u9650\u5236\u662fJavaScript\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u4e3b\u8981\u95ee\u9898\u4e4b\u4e00\u3002\u4e3a\u4e86\u4f18\u5316\u6027\u80fd\uff0c\u9996\u5148\u9700\u8981\u5bf9\u4ee3\u7801\u8fdb\u884c\u6027\u80fd\u5206\u6790\uff0c\u8bc6\u522b\u74f6\u9888\u6240\u5728\uff0c\u5982\u8fc7\u5ea6\u590d\u6742\u7684DOM\u64cd\u4f5c\u3001\u9891\u7e41\u7684\u9875\u9762\u91cd\u7ed8\u548c\u56de\u6d41\u3001\u672a\u7ecf\u4f18\u5316\u7684\u5faa\u73af\u7b49\u3002\u5728\u786e\u8bca\u95ee\u9898\u540e\uff0c\u624d\u80fd\u9488\u5bf9\u6027\u5730\u91c7\u53d6\u63aa\u65bd\u3002<\/p>\n<\/p>\n

\u4ee3\u7801\u4f18\u5316<\/strong><\/h3>\n<\/p>\n

\u4ee3\u7801\u4f18\u5316\u662f\u63d0\u9ad8JavaScript\u6267\u884c\u6548\u7387\u7684\u91cd\u8981\u624b\u6bb5\u3002\u901a\u8fc7\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u53d8\u91cf\u58f0\u660e\u3001\u4f7f\u7528\u9ad8\u6548\u7684\u6570\u636e\u7ed3\u6784\uff08\u5982Typed Arrays\uff09\uff0c\u5229\u7528Web Workers\u8fdb\u884c\u591a\u7ebf\u7a0b\u5904\u7406\uff0c\u4ee5\u53ca\u907f\u514d\u5728\u5173\u952e\u8def\u5f84\u4e0a\u6267\u884c\u6602\u8d35\u7684\u64cd\u4f5c\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u5347\u5e94\u7528\u6027\u80fd\u3002<\/p>\n<\/p>\n

\u5229\u7528\u73b0\u4ee3\u5de5\u5177\u548c\u6280\u672f<\/strong><\/h3>\n<\/p>\n

\u8fd1\u5e74\u6765\uff0cJavaScript\u751f\u6001\u4e2d\u6d8c\u73b0\u51fa\u4e86\u8bb8\u591a\u5de5\u5177\u548c\u6280\u672f\uff0c\u9488\u5bf9\u6027\u5730\u89e3\u51b3\u6027\u80fd\u95ee\u9898\u3002\u4f8b\u5982\uff0cTree Shaking\u6280\u672f\u80fd\u591f\u79fb\u9664\u672a\u4f7f\u7528\u7684\u4ee3\u7801\uff0c\u51cf\u5c0f\u6700\u7ec8\u5305\u7684\u4f53\u79ef\uff0c\u901a\u8fc7Code Splitting\u5c06\u4ee3\u7801\u5206\u4e3a\u591a\u4e2a\u5757\uff0c\u6309\u9700\u52a0\u8f7d\uff0c\u51cf\u5c11\u521d\u59cb\u5316\u65f6\u95f4\u3002\u6b64\u5916\uff0c\u5229\u7528\u73b0\u4ee3\u6d4f\u89c8\u5668\u63d0\u4f9b\u7684API\uff0c\u5982Intersection Observer API\u3001RequestIdleCallback\u7b49\uff0c\u53ef\u4ee5\u66f4\u5408\u7406\u5730\u5b89\u6392\u8d44\u6e90\u52a0\u8f7d\u548c\u6267\u884c\u65f6\u673a\uff0c\u4f18\u5316\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<\/p>\n

\u4e8c\u3001\u5b89\u5168\u95ee\u9898\u4e0e\u9632\u62a4\u63aa\u65bd<\/h2>\n<\/p>\n

\u5728Web\u5f00\u53d1\u4e2d\uff0c\u5b89\u5168\u95ee\u9898\u6c38\u8fdc\u662f\u9996\u8981\u8003\u8651\u7684\u56e0\u7d20\u3002JavaScript\u7531\u4e8e\u5176\u5ba2\u6237\u7aef\u7684\u7279\u6027\uff0c\u7ecf\u5e38\u6210\u4e3a\u653b\u51fb\u8005\u7684\u76ee\u6807\u3002<\/p>\n<\/p>\n

\u8de8\u7ad9\u811a\u672c\u653b\u51fb\uff08XSS\uff09<\/strong><\/h3>\n<\/p>\n

\u8de8\u7ad9\u811a\u672c\u653b\u51fb\uff08XSS\uff09\u662f\u5bf9JavaScript\u5e94\u7528\u975e\u5e38\u5e38\u89c1\u7684\u653b\u51fb\u65b9\u5f0f\u3002\u4e3a\u4e86\u9632\u5fa1XSS\uff0c\u5f00\u53d1\u8005\u9700\u8981\u5bf9\u6240\u6709\u7684\u7528\u6237\u8f93\u5165\u8fdb\u884c\u9a8c\u8bc1\u548c\u5904\u7406\u3002\u6b64\u5916\uff0c\u4f7f\u7528Content Security Policy\uff08CSP\uff09\u53ef\u4ee5\u6709\u6548\u51cf\u5c11XSS\u653b\u51fb\u7684\u98ce\u9669\uff0cCSP\u5141\u8bb8\u7f51\u7ad9\u7ba1\u7406\u8005\u5b9a\u4e49\u54ea\u4e9b\u5916\u90e8\u8d44\u6e90\u53ef\u4ee5\u88ab\u5f53\u524d\u7f51\u9875\u52a0\u8f7d\u548c\u6267\u884c\u3002<\/p>\n<\/p>\n

JavaScript\u4f9d\u8d56\u7684\u5b89\u5168<\/strong><\/h3>\n<\/p>\n

\u968f\u7740\u73b0\u4ee3Web\u5e94\u7528\u5bf9\u7b2c\u4e09\u65b9\u5e93\u548c\u6846\u67b6\u7684\u4f9d\u8d56\u52a0\u6df1\uff0c\u5982\u4f55\u786e\u4fdd\u8fd9\u4e9b\u4f9d\u8d56\u7684\u5b89\u5168\uff0c\u6210\u4e3a\u5fc5\u987b\u9762\u5bf9\u7684\u95ee\u9898\u3002\u901a\u8fc7\u4f7f\u7528\u8bf8\u5982npm audit\u3001Snyk\u7b49\u5de5\u5177\uff0c\u53ef\u4ee5\u5e2e\u52a9\u5f00\u53d1\u8005\u8bc6\u522b\u548c\u4fee\u590d\u5b89\u5168\u6f0f\u6d1e\u3002\u5b9a\u671f\u66f4\u65b0\u4f9d\u8d56\uff0c\u907f\u514d\u4f7f\u7528\u4e0d\u518d\u7ef4\u62a4\u7684\u5e93\uff0c\u4e5f\u662f\u4fdd\u8bc1\u5e94\u7528\u5b89\u5168\u7684\u91cd\u8981\u63aa\u65bd\u3002<\/p>\n<\/p>\n

\u4e09\u3001\u8de8\u6d4f\u89c8\u5668\u517c\u5bb9\u6027\u95ee\u9898<\/h2>\n<\/p>\n

\u8de8\u6d4f\u89c8\u5668\u517c\u5bb9\u6027\u662f\u53e6\u4e00\u4e2a\u957f\u4e45\u4ee5\u6765\u56f0\u6270\u5f00\u53d1\u8005\u7684\u95ee\u9898\u3002\u4e0d\u540c\u6d4f\u89c8\u5668\u5bf9JavaScript\u7684\u652f\u6301\u5b58\u5728\u5dee\u5f02\uff0c\u53ef\u80fd\u5bfc\u81f4\u76f8\u540c\u7684\u4ee3\u7801\u5728\u4e0d\u540c\u6d4f\u89c8\u5668\u4e0a\u8868\u73b0\u4e0d\u4e00\u3002<\/p>\n<\/p>\n

Polyfills\u548cTranspilation<\/strong><\/h3>\n<\/p>\n

\u4e3a\u4e86\u89e3\u51b3\u517c\u5bb9\u6027\u95ee\u9898\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u5229\u7528Polyfills\u548cTranspiler\u3002Polyfills\u5141\u8bb8\u5728\u65e7\u6d4f\u89c8\u5668\u4e2d\u6a21\u62df\u5b9e\u73b0\u65b0API\uff0c\u800cTranspiler\uff08\u5982Babel\uff09\u53ef\u4ee5\u5c06\u4f7f\u7528\u6700\u65b0JavaScript\u7279\u6027\u7f16\u5199\u7684\u4ee3\u7801\u8f6c\u6362\u4e3a\u65e7\u7248\u672c\u6d4f\u89c8\u5668\u4e5f\u80fd\u7406\u89e3\u548c\u6267\u884c\u7684\u4ee3\u7801\u3002<\/p>\n<\/p>\n

\u7279\u6027\u68c0\u6d4b\u4e0e\u6e10\u8fdb\u589e\u5f3a<\/strong><\/h3>\n<\/p>\n

\u7279\u6027\u68c0\u6d4b\u662f\u4e00\u79cd\u6280\u672f\uff0c\u901a\u8fc7\u5b83\uff0c\u4ee3\u7801\u53ef\u4ee5\u68c0\u6d4b\u6d4f\u89c8\u5668\u662f\u5426\u652f\u6301\u67d0\u4e2a\u7279\u6027\uff0c\u4ece\u800c\u51b3\u5b9a\u662f\u5426\u4f7f\u7528\u8be5\u7279\u6027\u3002\u6e10\u8fdb\u589e\u5f3a\u7684\u7b56\u7565\u5219\u662f\u9996\u5148\u4e3a\u6240\u6709\u6d4f\u89c8\u5668\u63d0\u4f9b\u57fa\u672c\u529f\u80fd\uff0c\u7136\u540e\u6839\u636e\u6d4f\u89c8\u5668\u7684\u80fd\u529b\uff0c\u9010\u6b65\u6dfb\u52a0\u66f4\u591a\u7684\u529f\u80fd\u548c\u4f18\u5316\uff0c\u4ee5\u6b64\u6765\u786e\u4fdd\u6700\u597d\u7684\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<\/p>\n

\u56db\u3001\u964d\u4f4e\u5165\u95e8\u95e8\u69db<\/h2>\n<\/p>\n

\u867d\u7136JavaScript\u7684\u7075\u6d3b\u6027\u548c\u5f3a\u5927\u529f\u80fd\u5438\u5f15\u4e86\u4f17\u591a\u5f00\u53d1\u8005\uff0c\u4f46\u5176\u7075\u6d3b\u6027\u540c\u6837\u4f7f\u5f97\u521d\u5b66\u8005\u9762\u4e34\u4e00\u5b9a\u7684\u5b66\u4e60\u6311\u6218\u3002<\/p>\n<\/p>\n

\u5b66\u4e60\u8d44\u6e90\u548c\u793e\u533a\u652f\u6301<\/strong><\/h3>\n<\/p>\n

\u5e78\u8fd0\u7684\u662f\uff0cJavaScript\u62e5\u6709\u5e9e\u5927\u7684\u793e\u533a\u548c\u4e30\u5bcc\u7684\u5b66\u4e60\u8d44\u6e90\u3002\u65e0\u6570\u7684\u5728\u7ebf\u6559\u7a0b\u3001\u8bfe\u7a0b\u3001\u4ee5\u53ca\u793e\u533a\u548c\u8bba\u575b\u7b49\uff0c\u4e3a\u521d\u5b66\u8005\u63d0\u4f9b\u4e86\u5b66\u4e60\u8def\u5f84\u548c\u95ee\u9898\u89e3\u7b54\u7684\u573a\u6240\u3002\u79ef\u6781\u53c2\u4e0e\u793e\u533a\uff0c\u5229\u7528\u73b0\u6709\u8d44\u6e90\uff0c\u53ef\u4ee5\u6709\u6548\u7f29\u77ed\u5b66\u4e60\u66f2\u7ebf\u3002<\/p>\n<\/p>\n

\u5b9e\u8df5\u5bfc\u5411\u5b66\u4e60<\/strong><\/h3>\n<\/p>\n

\u5bf9\u4e8e\u521d\u5b66\u8005\u6765\u8bf4\uff0c\u8fb9\u5b66\u8fb9\u505a\u662f\u638c\u63e1JavaScript\u7684\u6709\u6548\u65b9\u6cd5\u3002\u901a\u8fc7\u5b9e\u9645\u9879\u76ee\u5b9e\u8df5\uff0c\u4e0d\u4ec5\u80fd\u52a0\u6df1\u5bf9\u8bed\u8a00\u7279\u6027\u7684\u7406\u89e3\uff0c\u800c\u4e14\u80fd\u63d0\u9ad8\u89e3\u51b3\u95ee\u9898\u7684\u80fd\u529b\u3002\u4ece\u5c0f\u9879\u76ee\u5f00\u59cb\uff0c\u9010\u6b65\u589e\u52a0\u96be\u5ea6\uff0c\u662f\u9010\u6b65\u6210\u957f\u4e3a\u719f\u7ec3\u5f00\u53d1\u8005\u7684\u6709\u6548\u9014\u5f84\u3002<\/p>\n<\/p>\n

\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u63a2\u8ba8\u4e86JavaScript\u9762\u4e34\u7684\u4e00\u4e9b\u4e3b\u8981\u6311\u6218\u53ca\u5176\u5bf9\u7b56\u3002\u867d\u7136JavaScript\u4f5c\u4e3a\u4e00\u79cd\u7f16\u7a0b\u8bed\u8a00\u5b58\u5728\u5c40\u9650\u6027\uff0c\u4f46\u901a\u8fc7\u4e0a\u8ff0\u7b56\u7565\u4e0e\u89e3\u51b3\u65b9\u6848\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u514b\u670d\u8fd9\u4e9b\u6311\u6218\uff0c\u5145\u5206\u5229\u7528JavaScript\u7684\u6f5c\u529b\uff0c\u5f00\u53d1\u51fa\u9ad8\u6548\u3001\u5b89\u5168\u4e14\u7528\u6237\u4f53\u9a8c\u826f\u597d\u7684Web\u5e94\u7528\u3002<\/p>\n<\/p>\n

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

\u4e3a\u4ec0\u4e48\u6709\u4eba\u8ba4\u4e3aJavaScript\u8d28\u91cf\u8f83\u5dee\uff1f<\/strong><\/p>\n

    \n
  • \u5728\u4e00\u4e9b\u60c5\u51b5\u4e0b\uff0cJavaScript\u53ef\u80fd\u5177\u6709\u6bd4\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\u66f4\u590d\u6742\u7684\u8bed\u6cd5\u548c\u7279\u6027\uff0c\u8fd9\u4f7f\u5f97\u521d\u5b66\u8005\u53ef\u80fd\u611f\u89c9\u6709\u4e9b\u56f0\u60d1\u3002\u8fd9\u53ef\u80fd\u5bfc\u81f4\u67d0\u4e9b\u4eba\u8ba4\u4e3a\u5b83\u662f\u201c\u5783\u573e\u201d\u7684\u539f\u56e0\u4e4b\u4e00\u3002<\/li>\n
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    JavaScript\u76f8\u6bd4\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\u6709\u54ea\u4e9b\u4f18\u52bf\uff1f<\/strong><\/p>\n

      \n
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        \n
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