{"id":167456,"date":"2024-05-08T16:03:02","date_gmt":"2024-05-08T08:03:02","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/167456.html"},"modified":"2024-05-08T16:03:06","modified_gmt":"2024-05-08T08:03:06","slug":"javascript%e7%9a%84%e5%86%85%e5%ad%98%e5%a0%86%e6%a0%88%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/167456.html","title":{"rendered":"javascript\u7684\u5185\u5b58\u5806\u6808\u95ee\u9898"},"content":{"rendered":"

\"javascript\u7684\u5185\u5b58\u5806\u6808\u95ee\u9898\"<\/p>\n

\u5728\u8ba8\u8bbaJavaScript\u7684\u5185\u5b58\u95ee\u9898\u65f6\uff0c\u6211\u4eec\u4e3b\u8981\u5173\u6ce8\u7684\u662f\u5185\u5b58\u5806<\/strong>\u548c\u8c03\u7528\u5806\u6808<\/strong>\u4e24\u4e2a\u5173\u952e\u90e8\u5206\u3002\u8fd9\u4e24\u4e2a\u90e8\u5206\u5bf9\u4e8e\u7406\u89e3JavaScript\u7684\u8fd0\u884c\u673a\u5236\u548c\u4f18\u5316\u6027\u80fd\u81f3\u5173\u91cd\u8981\u3002\u5185\u5b58\u5806<\/strong>\u662f\u7528\u4e8e\u5b58\u50a8\u5bf9\u8c61\uff08\u53d8\u91cf\u3001\u51fd\u6570\u95ed\u5305\u7b49\uff09\u7684\u5185\u5b58\u533a\u57df\uff0c\u800c\u8c03\u7528\u5806\u6808<\/strong>\u5219\u7528\u4e8e\u8ffd\u8e2a\u51fd\u6570\u8c03\u7528\u7684\u6267\u884c\u987a\u5e8f\u3002\u8be6\u7ec6\u6765\u8bf4\uff0c\u5185\u5b58\u5806<\/strong>\u4f5c\u4e3a\u4e00\u79cd\u7ed3\u6784\u6742\u4e71\u7684\u5185\u5b58\u533a\u57df\uff0c\u7528\u4e8e\u5b58\u50a8\u6240\u6709\u5bf9\u8c61\u6570\u636e\uff0cJavaScript\u5f15\u64ce\u4f1a\u81ea\u52a8\u8fdb\u884c\u5783\u573e\u56de\u6536\uff0c\u4ee5\u6e05\u7406\u4e0d\u518d\u88ab\u5f15\u7528\u7684\u5bf9\u8c61\uff0c\u91ca\u653e\u5185\u5b58\u3002\u800c\u8c03\u7528\u5806\u6808<\/strong>\u5219\u4e25\u683c\u9075\u5faa\u540e\u8fdb\u5148\u51fa\u7684\u539f\u5219\uff0c\u8bb0\u5f55\u7740\u5f53\u524d\u6267\u884c\u7684\u6240\u6709\u51fd\u6570\u8c03\u7528\uff0c\u6bcf\u6b21\u8c03\u7528\u51fd\u6570\u65f6\uff0c\u90fd\u4f1a\u5c06\u5176\u6dfb\u52a0\u5230\u5806\u6808\u9876\u90e8\uff0c\u51fd\u6570\u6267\u884c\u5b8c\u6bd5\u540e\u518d\u4ece\u5806\u6808\u4e2d\u79fb\u9664\u3002\u5728\u8fd9\u4e24\u8005\u4e4b\u95f4\uff0c\u8c03\u7528\u5806\u6808<\/strong>\u95ee\u9898\u901a\u5e38\u66f4\u4e3a\u76f4\u89c2\uff0c\u6bd4\u5982\u201c\u5806\u6808\u6ea2\u51fa\u201d\u5c31\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u95ee\u9898\uff0c\u53d1\u751f\u4e8e\u5f53\u5806\u6808\u8fbe\u5230\u5176\u6700\u5927\u5bb9\u91cf\u9650\u5236\u65f6\uff0c\u901a\u5e38\u662f\u7531\u4e8e\u9012\u5f52\u8c03\u7528\u9020\u6210\u7684\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u5185\u5b58\u5806\uff1a\u5bf9\u8c61\u5b58\u50a8\u4e0e\u5783\u573e\u56de\u6536<\/h3>\n<\/p>\n

JavaScript\u7684\u5185\u5b58\u5806\u662f\u4e00\u79cd\u8f83\u4e3a\u590d\u6742\u3001\u65e0\u5e8f\u7684\u5185\u5b58\u7ed3\u6784\uff0c\u7528\u4e8e\u5b58\u50a8\u6240\u6709\u7684\u5bf9\u8c61\u6570\u636e\u3002\u6bcf\u5f53\u4f60\u5728JavaScript\u4e2d\u521b\u5efa\u5bf9\u8c61\uff08\u5305\u62ec\u51fd\u6570\uff09\u65f6\uff0c\u5b83\u4eec\u5c31\u4f1a\u88ab\u5b58\u50a8\u5728\u5185\u5b58\u5806\u4e2d\u3002\u8fd9\u79cd\u5b58\u50a8\u65b9\u5f0f\u7684\u4e00\u4e2a\u6838\u5fc3\u95ee\u9898\u662f\u5982\u4f55\u6709\u6548\u7ba1\u7406\u5185\u5b58\uff0c\u907f\u514d\u5185\u5b58\u6cc4\u9732\u3002JavaScript\u5f15\u64ce\u4f7f\u7528\u5783\u573e\u56de\u6536\u673a\u5236\u81ea\u52a8\u76d1\u89c6\u5b58\u50a8\u5728\u5185\u5b58\u5806\u4e2d\u7684\u5bf9\u8c61\uff0c\u5e76\u5b9a\u671f\u6e05\u7406\u90a3\u4e9b\u4e0d\u518d\u88ab\u5f15\u7528\u7684\u5bf9\u8c61\u3002<\/p>\n<\/p>\n

\u5783\u573e\u56de\u6536\u673a\u5236\u4e3b\u8981\u6709\u4e24\u79cd\u7b97\u6cd5\uff1a\u6807\u8bb0\u6e05\u9664\u548c\u5f15\u7528\u8ba1\u6570\u3002\u6807\u8bb0\u6e05\u9664<\/strong>\u662f\u6700\u5e38\u7528\u7684\u5783\u573e\u56de\u6536\u673a\u5236\uff0c\u5b83\u7684\u5de5\u4f5c\u539f\u7406\u662f\u6807\u8bb0\u6240\u6709\u4ece\u6839\u90e8\uff08\u901a\u5e38\u662f\u5168\u5c40\u53d8\u91cf\uff09\u5f00\u59cb\u7684\u6d3b\u52a8\u5bf9\u8c61\uff0c\u7136\u540e\u6e05\u9664\u672a\u88ab\u6807\u8bb0\u7684\u5bf9\u8c61\u3002\u8fd9\u79cd\u65b9\u6cd5\u7684\u4e00\u4e2a\u4f18\u70b9\u662f\u53ef\u4ee5\u6709\u6548\u907f\u514d\u5faa\u73af\u5f15\u7528\u7684\u95ee\u9898\uff0c\u8fd9\u662f\u5f15\u7528\u8ba1\u6570\u7b97\u6cd5\u96be\u4ee5\u89e3\u51b3\u7684\u3002<\/p>\n<\/p>\n

\u4e8c\u3001\u8c03\u7528\u5806\u6808\uff1a\u51fd\u6570\u8c03\u7528\u7684\u8ffd\u8e2a<\/h3>\n<\/p>\n

\u8c03\u7528\u5806\u6808\uff0c\u53c8\u79f0\u4f5c\u6267\u884c\u6808\uff0c\u662fJavaScript\u4e2d\u7528\u4e8e\u8ddf\u8e2a\u51fd\u6570\u8c03\u7528\u987a\u5e8f\u7684\u7ed3\u6784\u3002\u6bcf\u5f53JavaScript\u7a0b\u5e8f\u521d\u59cb\u5316\u6216\u8005\u6709\u51fd\u6570\u88ab\u8c03\u7528\u65f6\uff0c\u8be5\u51fd\u6570\u5c31\u4f1a\u88ab\u6dfb\u52a0\u5230\u8c03\u7528\u5806\u6808\u7684\u9876\u90e8\u3002\u4e00\u65e6\u51fd\u6570\u6267\u884c\u5b8c\u6bd5\uff0c\u5b83\u5c31\u4f1a\u4ece\u5806\u6808\u9876\u90e8\u88ab\u79fb\u9664\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u9075\u5faa\u540e\u8fdb\u5148\u51fa\uff08LIFO\uff09\u7684\u539f\u5219\u3002<\/p>\n<\/p>\n

\u5806\u6808\u6ea2\u51fa\u662f\u5728\u8c03\u7528\u5806\u6808\u4e2d\u9891\u7e41\u51fa\u73b0\u7684\u95ee\u9898\u4e4b\u4e00\uff0c\u5b83\u53d1\u751f\u5728\u8c03\u7528\u5806\u6808\u5c1d\u8bd5\u5b58\u50a8\u7684\u51fd\u6570\u8c03\u7528\u6570\u91cf\u8d85\u8fc7\u4e86\u5176\u6700\u5927\u5bb9\u91cf\u9650\u5236\u65f6\u3002\u5728JavaScript\u4e2d\uff0c\u4e00\u4e2a\u5178\u578b\u7684\u4f8b\u5b50\u662f\u9012\u5f52\u8c03\u7528\uff0c\u6ca1\u6709\u6b63\u786e\u7684\u7ec8\u6b62\u6761\u4ef6\u6216\u8005\u7ec8\u6b62\u6761\u4ef6\u8bbe\u7f6e\u4e0d\u6b63\u786e\uff0c\u5bfc\u81f4\u51fd\u6570\u4e0d\u65ad\u5730\u8c03\u7528\u81ea\u5df1\uff0c\u800c\u6ca1\u6709\u9000\u51fa\u7684\u673a\u4f1a\uff0c\u6700\u7ec8\u6d88\u8017\u6389\u5806\u6808\u7684\u6240\u6709\u53ef\u7528\u7a7a\u95f4\u3002<\/p>\n<\/p>\n

\u4e09\u3001\u907f\u514d\u5185\u5b58\u6cc4\u9732\uff1a\u6700\u4f73\u5b9e\u8df5<\/h3>\n<\/p>\n

\u5185\u5b58\u6cc4\u9732\u6307\u7684\u662f\u4e0d\u518d\u9700\u8981\u7684\u5185\u5b58\u6ca1\u6709\u88ab\u6b63\u786e\u91ca\u653e\u56de\u5185\u5b58\u6c60\u3002\u5728JavaScript\u4e2d\uff0c\u5e38\u89c1\u7684\u5185\u5b58\u6cc4\u9732\u60c5\u51b5\u5305\u62ec\u672a\u6e05\u7406\u7684\u5b9a\u65f6\u5668\u548c\u76d1\u542c\u5668\u3001\u8fc7\u5ea6\u7684\u5168\u5c40\u53d8\u91cf\u3001\u88ab\u9057\u5fd8\u7684\u95ed\u5305\u4ee5\u53caDOM\u5f15\u7528\u3002\u907f\u514d\u5185\u5b58\u6cc4\u9732\u7684\u7b56\u7565\u5305\u62ec\u5b9a\u671f\u5ba1\u67e5\u548c\u4f18\u5316\u4ee3\u7801\u3001\u4f7f\u7528\u5f31\u5f15\u7528\u4ee5\u53ca\u5229\u7528\u73b0\u4ee3\u6d4f\u89c8\u5668\u7684\u5f00\u53d1\u8005\u5de5\u5177\u8fdb\u884c\u6027\u80fd\u5206\u6790\u3002<\/p>\n<\/p>\n

\u4e00\u4e2a\u597d\u4e60\u60ef\u662f\u5b9a\u671f\u5ba1\u67e5\u4ee3\u7801\uff0c\u68c0\u67e5\u662f\u5426\u6709\u65e0\u7528\u7684\u53d8\u91cf\u6216\u8005\u5bf9\u8c61\u6ca1\u6709\u88ab\u6e05\u7406\u3002\u540c\u65f6\uff0c\u5229\u7528WeakMap<\/code>\u6216WeakSet<\/code>\u8fd9\u6837\u7684\u5f31\u5f15\u7528\u96c6\u5408\u53ef\u4ee5\u5e2e\u52a9\u51cf\u5c11\u5185\u5b58\u6cc4\u9732\u7684\u98ce\u9669\uff0c\u56e0\u4e3a\u5b83\u4eec\u5141\u8bb8\u5783\u573e\u56de\u6536\u5668\u56de\u6536\u5176\u5185\u90e8\u5143\u7d20\u3002<\/p>\n<\/p>\n

\u56db\u3001\u6027\u80fd\u4f18\u5316\uff1a\u5185\u5b58\u7ba1\u7406\u6280\u5de7<\/h3>\n<\/p>\n

\u4e3a\u4e86\u4f18\u5316JavaScript\u7684\u6027\u80fd\uff0c\u6709\u6548\u7684\u5185\u5b58\u7ba1\u7406\u662f\u5173\u952e\u3002\u8fd9\u5305\u62ec\u53ca\u65f6\u6e05\u7406\u65e0\u7528\u7684\u5bf9\u8c61\u3001\u907f\u514d\u8fc7\u5ea6\u5206\u914d\u5185\u5b58\u4ee5\u53ca\u907f\u514d\u5bc6\u96c6\u7684DOM\u64cd\u4f5c\u3002\u4e00\u4e2a\u5b9e\u7528\u7684\u6280\u5de7\u662f\u4f7f\u7528\u5bf9\u8c61\u6c60\u6280\u672f\uff0c\u7279\u522b\u662f\u5728\u5904\u7406\u5927\u91cf\u7684\u5bf9\u8c61\u4e14\u5bf9\u8c61\u751f\u547d\u5468\u671f\u8f83\u77ed\u7684\u60c5\u51b5\u4e0b\u3002\u5bf9\u8c61\u6c60\u5141\u8bb8\u91cd\u590d\u4f7f\u7528\u5bf9\u8c61\uff0c\u800c\u4e0d\u662f\u6bcf\u6b21\u9700\u8981\u65f6\u521b\u5efa\u65b0\u5bf9\u8c61\uff0c\u4ece\u800c\u51cf\u5c11\u4e86\u5783\u573e\u56de\u6536\u5668\u7684\u538b\u529b\u3002<\/p>\n<\/p>\n

\u6b64\u5916\uff0c\u7406\u89e3\u548c\u5229\u7528\u73b0\u4ee3JavaScript\u5f15\u64ce\u7684\u4f18\u5316\u7b56\u7565\u4e5f\u975e\u5e38\u91cd\u8981\u3002\u4f8b\u5982\uff0c\u5927\u591a\u6570\u73b0\u4ee3\u6d4f\u89c8\u5668\u90fd\u4f7f\u7528\u5373\u65f6\u7f16\u8bd1\uff08JIT\uff09\u6280\u672f\u6765\u4f18\u5316\u4ee3\u7801\u6267\u884c\u901f\u5ea6\u3002\u6df1\u5165\u7406\u89e3\u8fd9\u4e9b\u673a\u5236\u53ef\u4ee5\u5e2e\u52a9\u5f00\u53d1\u8005\u5199\u51fa\u4e0d\u4ec5\u9ad8\u6548\u4f46\u4e5f\u5185\u5b58\u53cb\u597d\u7684\u4ee3\u7801\u3002<\/p>\n<\/p>\n

\u901a\u8fc7\u9632\u6b62\u5185\u5b58\u6cc4\u9732\u3001\u4f18\u5316\u5185\u5b58\u5206\u914d\u548c\u7ba1\u7406\uff0c\u4ee5\u53ca\u5145\u5206\u5229\u7528JavaScript\u5f15\u64ce\u63d0\u4f9b\u7684\u5404\u79cd\u4f18\u5316\u6280\u672f\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u5e94\u7528\u7684\u6027\u80fd\u548c\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<\/p>\n

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

1. JavaScript\u4e2d\u7684\u5185\u5b58\u7ba1\u7406\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff1f<\/strong>
\nJavaScript\u4e2d\u7684\u5185\u5b58\u7ba1\u7406\u662f\u901a\u8fc7\u5806\u6808\u7684\u65b9\u5f0f\u6765\u8fdb\u884c\u7684\u3002\u5806\u662f\u7528\u6765\u5b58\u50a8\u590d\u6742\u6570\u636e\u7c7b\u578b\u7684\u5730\u65b9\uff0c\u5982\u5bf9\u8c61\u548c\u6570\u7ec4\u3002\u800c\u6808\u662f\u7528\u6765\u5b58\u50a8\u7b80\u5355\u6570\u636e\u7c7b\u578b\u7684\u5730\u65b9\uff0c\u5982\u6570\u5b57\u548c\u5e03\u5c14\u503c\u3002\u5f53\u6211\u4eec\u58f0\u660e\u4e00\u4e2a\u53d8\u91cf\u65f6\uff0c\u5b83\u4f1a\u88ab\u5b58\u50a8\u5728\u6808\u4e2d\uff0c\u800c\u5f53\u6211\u4eec\u4e3a\u8fd9\u4e2a\u53d8\u91cf\u8d4b\u4e88\u4e00\u4e2a\u590d\u6742\u7684\u503c\uff08\u6bd4\u5982\u4e00\u4e2a\u5bf9\u8c61\uff09\uff0c\u8fd9\u4e2a\u503c\u5c06\u88ab\u5b58\u50a8\u5728\u5806\u4e2d\uff0c\u5e76\u4e14\u6808\u4e2d\u7684\u53d8\u91cf\u5c06\u6307\u5411\u5806\u4e2d\u7684\u503c\u3002<\/p>\n

2. JavaScript\u4e2d\u7684\u5185\u5b58\u6cc4\u6f0f\u662f\u4ec0\u4e48\uff1f\u5982\u4f55\u907f\u514d\u5b83\uff1f<\/strong>
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3. JavaScript\u4e2d\u7684\u5783\u573e\u56de\u6536\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff1f<\/strong>
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