{"id":159252,"date":"2024-05-08T13:06:24","date_gmt":"2024-05-08T05:06:24","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/159252.html"},"modified":"2024-05-08T13:06:31","modified_gmt":"2024-05-08T05:06:31","slug":"%e5%a6%82%e4%bd%95%e9%81%bf%e5%85%8d-javascript-%e5%8e%9f%e5%9e%8b%e9%93%be%e4%b8%8a%e7%9a%84%e5%af%b9%e8%b1%a1%e5%85%ac%e5%bc%80","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/159252.html","title":{"rendered":"\u5982\u4f55\u907f\u514d javascript \u539f\u578b\u94fe\u4e0a\u7684\u5bf9\u8c61\u516c\u5f00"},"content":{"rendered":"

\"\u5982\u4f55\u907f\u514d<\/p>\n

\u907f\u514dJavaScript\u539f\u578b\u94fe\u4e0a\u7684\u5bf9\u8c61\u516c\u5f00\u9700\u8981\u91c7\u53d6\u4e00\u4e9b\u7b56\u7565\u548c\u6280\u672f\uff0c\u4ee5\u786e\u4fdd\u4ee3\u7801\u7684\u5b89\u5168\u6027\u548c\u7ef4\u62a4\u6027\u3002\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u5305\u62ec\u4f7f\u7528\u95ed\u5305\u3001\u4f7f\u7528ES6\u7684Symbols\u3001\u5229\u7528WeakMaps\u3001\u4ee5\u53ca\u901a\u8fc7ES6\u7c7b\u8bed\u6cd5\u5c01\u88c5\u79c1\u6709\u5c5e\u6027\u548c\u65b9\u6cd5<\/strong>\u3002\u5728\u8fd9\u4e9b\u7b56\u7565\u4e2d\uff0c\u4f7f\u7528\u95ed\u5305<\/strong>\u662f\u4e00\u79cd\u975e\u5e38\u6709\u6548\u7684\u65b9\u5f0f\uff0c\u5b83\u53ef\u4ee5\u5e2e\u52a9\u521b\u5efa\u79c1\u6709\u53d8\u91cf\u548c\u51fd\u6570\uff0c\u907f\u514d\u5b83\u4eec\u5728\u539f\u578b\u94fe\u4e0a\u88ab\u516c\u5f00\u8bbf\u95ee\u3002<\/p>\n<\/p>\n

\u95ed\u5305\u662fJavaScript\u4e2d\u4e00\u4e2a\u5f3a\u5927\u7684\u7279\u6027\uff0c\u5b83\u5141\u8bb8\u51fd\u6570\u8bbf\u95ee\u521b\u5efa\u5b83\u4eec\u65f6\u7684\u8bcd\u6cd5\u4f5c\u7528\u57df\u3002\u8fd9\u610f\u5473\u7740\u5373\u4f7f\u5916\u90e8\u4f5c\u7528\u57df\u5df2\u7ecf\u5173\u95ed\uff0c\u51fd\u6570\u5185\u90e8\u4ecd\u7136\u53ef\u4ee5\u8bbf\u95ee\u5916\u90e8\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\u548c\u51fd\u6570\u3002\u5229\u7528\u8fd9\u4e00\u7279\u6027\uff0c\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u51fd\u6570\u5185\u90e8\u7684\u79c1\u6709\u53d8\u91cf\u548c\u65b9\u6cd5\uff0c\u8fd9\u4e9b\u79c1\u6709\u6210\u5458\u4e0d\u4f1a\u88ab\u5916\u90e8\u8bbf\u95ee\uff0c\u56e0\u6b64\u4e0d\u4f1a\u66b4\u9732\u5728\u539f\u578b\u94fe\u4e0a\u3002<\/p>\n<\/p>\n

\u4e00\u3001USING CLOSURES TO ENCAPSULATE PRIVATE MEMBERS<\/h3>\n<\/p>\n

\u95ed\u5305\u53ef\u4ee5\u7528\u4e8e\u5c01\u88c5\u5bf9\u8c61\u7684\u79c1\u6709\u6210\u5458\uff0c\u907f\u514d\u5b83\u4eec\u66b4\u9732\u5728\u539f\u578b\u94fe\u4e0a\u3002<\/p>\n<\/p>\n

    \n
  1. \u5728\u6784\u9020\u51fd\u6570\u4e2d\u5b9a\u4e49\u79c1\u6709\u53d8\u91cf\u548c\u51fd\u6570\u3002\u8fd9\u4e9b\u53d8\u91cf\u548c\u51fd\u6570\u53ea\u80fd\u901a\u8fc7\u6784\u9020\u51fd\u6570\u5185\u90e8\u7684\u516c\u5f00\u65b9\u6cd5\u8bbf\u95ee\u3002\u8fd9\u6837\uff0c\u5373\u4f7f\u5b9e\u4f8b\u88ab\u521b\u5efa\uff0c\u79c1\u6709\u6210\u5458\u4e5f\u4e0d\u4f1a\u66b4\u9732\u5728\u539f\u578b\u94fe\u4e0a\u3002<\/li>\n
  2. \u901a\u8fc7\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u516c\u5f00\u65b9\u6cd5\u7684\u5bf9\u8c61\uff0c\u53ef\u4ee5\u8bbf\u95ee\u8fd9\u4e9b\u79c1\u6709\u6210\u5458\u3002\u516c\u5f00\u65b9\u6cd5\u5728\u95ed\u5305\u7684\u4f5c\u7528\u57df\u5185\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u4ee5\u8bbf\u95ee\u79c1\u6709\u6210\u5458\uff0c\u800c\u8fd9\u4e9b\u6210\u5458\u5bf9\u5916\u754c\u662f\u9690\u85cf\u7684\u3002<\/li>\n<\/ol>\n

    \u4e8c\u3001UTILIZING ES6 SYMBOLS FOR PRIVATE PROPERTIES<\/h3>\n<\/p>\n

    ES6\u7684Symbols\u4e3aJavaScript\u5e26\u6765\u4e86\u4e00\u79cd\u65b0\u7684\u539f\u751f\u673a\u5236\uff0c\u7528\u4e8e\u521b\u5efa\u5bf9\u8c61\u7684\u552f\u4e00\u5c5e\u6027\u540d\uff0c\u8fd9\u4e9b\u5c5e\u6027\u540d\u4e0d\u4f1a\u4e0e\u5bf9\u8c61\u4e0a\u7684\u5176\u4ed6\u5c5e\u6027\u51b2\u7a81\u3002<\/p>\n<\/p>\n

      \n
    1. Symbol\u4f5c\u4e3a\u5c5e\u6027\u540d\u65f6\uff0c\u5916\u90e8\u4ee3\u7801\u65e0\u6cd5\u76f4\u63a5\u8bbf\u95ee\u8fd9\u4e9b\u5c5e\u6027\uff0c\u56e0\u4e3a\u5916\u90e8\u4ee3\u7801\u65e0\u6cd5\u9884\u77e5\u6216\u91cd\u73b0\u8fd9\u4e2aSymbol\u503c\u3002\u8fd9\u4e3a\u5728\u5bf9\u8c61\u4e0a\u521b\u5efa\u201c\u79c1\u6709\u201d\u5c5e\u6027\u63d0\u4f9b\u4e86\u53ef\u80fd\u3002<\/li>\n
    2. \u5c3d\u7ba1\u4f7f\u7528Symbol\u53ef\u4ee5\u907f\u514d\u5c5e\u6027\u540d\u7684\u51b2\u7a81\uff0c\u4f46\u662f\u901a\u8fc7Object.getOwnPropertySymbols\u65b9\u6cd5\u8fd8\u662f\u53ef\u4ee5\u83b7\u5f97\u5bf9\u8c61\u4e0a\u7684\u6240\u6709Symbol\u5c5e\u6027\u540d\u3002\u56e0\u6b64\uff0cSymbols\u65b9\u6cd5\u63d0\u4f9b\u7684\u662f\u4e00\u79cd\u5f31\u79c1\u6709\u6027\u3002<\/li>\n<\/ol>\n

      \u4e09\u3001LEVERAGING WEAKMAPS FOR ENCAPSULATION<\/h3>\n<\/p>\n

      WeakMaps\u63d0\u4f9b\u4e86\u4e00\u79cd\u5728\u5bf9\u8c61\u4e4b\u95f4\u5b89\u5168\u5b58\u50a8\u79c1\u6709\u6570\u636e\u7684\u673a\u5236\u3002<\/p>\n<\/p>\n

        \n
      1. WeakMap\u7684\u952e\u662f\u5bf9\u8c61\uff0c\u503c\u53ef\u4ee5\u662f\u4efb\u4f55\u503c\u3002WeakMap\u5185\u90e8\u7684\u6570\u636e\u9879\u4e0d\u4f1a\u963b\u6b62\u5783\u573e\u56de\u6536\u673a\u5236\u56de\u6536\u5176\u952e\u6240\u6307\u5411\u7684\u5bf9\u8c61\u3002<\/li>\n
      2. \u5728\u5bf9\u8c61\u4e0e\u5176\u79c1\u6709\u6570\u636e\u4e4b\u95f4\u5efa\u7acb\u4e86\u4e00\u79cd\u5f31\u7ed1\u5b9a\u7684\u5173\u7cfb\uff0c\u4ece\u800c\u53ef\u4ee5\u786e\u4fdd\u79c1\u6709\u6570\u636e\u7684\u9690\u79c1\u3002\u56e0\u4e3a\u8fd9\u4e9b\u6570\u636e\u53ea\u80fd\u901a\u8fc7\u5bf9\u5e94\u7684\u5bf9\u8c61\u6765\u8bbf\u95ee\uff0c\u800c\u4e0d\u662f\u76f4\u63a5\u66b4\u9732\u5728\u539f\u578b\u94fe\u4e0a\u3002<\/li>\n<\/ol>\n

        \u56db\u3001ENCAPSULATING WITH ES6 CLASS SYNTAX<\/h3>\n<\/p>\n

        ES6\u7c7b\u8bed\u6cd5\u63d0\u4f9b\u4e86\u66f4\u6e05\u6670\u7684\u8bed\u6cd5\u6765\u521b\u5efa\u5bf9\u8c61\u548c\u5904\u7406\u7ee7\u627f\uff0c\u540c\u65f6\u4e5f\u4e3a\u5c01\u88c5\u63d0\u4f9b\u4e86\u652f\u6301\u3002<\/p>\n<\/p>\n

          \n
        1. \u5c3d\u7ba1ES6\u7c7b\u5e76\u6ca1\u6709\u76f4\u63a5\u63d0\u4f9b\u4e00\u79cd\u539f\u751f\u673a\u5236\u6765\u521b\u5efa\u79c1\u6709\u5c5e\u6027\u6216\u65b9\u6cd5\uff0c\u4f46\u6211\u4eec\u53ef\u4ee5\u7ed3\u5408\u4f7f\u7528\u95ed\u5305\u548c\u547d\u540d\u7ea6\u5b9a\uff08\u4f8b\u5982\u524d\u7f00"_"\uff09\u6765\u6a21\u62df\u79c1\u6709\u6210\u5458\u3002<\/li>\n
        2. \u8fd1\u5e74\u6765\uff0cJavaScript\u793e\u533a\u8fd8\u63d0\u51fa\u4e86\u4e00\u4e9b\u63d0\u6848\uff0c\u6bd4\u5982\u7c7b\u5b57\u6bb5\u63d0\u6848\uff0c\u8fd9\u4e9b\u63d0\u6848\u65e8\u5728\u539f\u751f\u652f\u6301\u79c1\u6709\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u4e00\u65e6\u8fd9\u4e9b\u63d0\u6848\u88ab\u6b63\u5f0f\u91c7\u7eb3\uff0c\u5c06\u63d0\u4f9b\u66f4\u52a0\u6807\u51c6\u548c\u5b89\u5168\u7684\u65b9\u5f0f\u6765\u5c01\u88c5\u79c1\u6709\u6210\u5458\u3002<\/li>\n<\/ol>\n

          \u901a\u8fc7\u91c7\u7528\u4ee5\u4e0a\u7b56\u7565\u548c\u6280\u672f\uff0c\u53ef\u4ee5\u6709\u6548\u907f\u514dJavaScript\u539f\u578b\u94fe\u4e0a\u5bf9\u8c61\u7684\u516c\u5f00\uff0c\u589e\u5f3a\u4ee3\u7801\u7684\u5b89\u5168\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u8fd9\u4e0d\u4ec5\u6709\u52a9\u4e8e\u4fdd\u62a4\u79c1\u6709\u6570\u636e\u548c\u903b\u8f91\uff0c\u8fd8\u6709\u52a9\u4e8e\u5b9e\u73b0\u66f4\u52a0\u6a21\u5757\u5316\u548c\u7ed3\u6784\u5316\u7684\u4ee3\u7801\u8bbe\u8ba1\u3002<\/p>\n<\/p>\n

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

            \u4e3a\u4ec0\u4e48\u9700\u8981\u907f\u514djavascript\u539f\u578b\u94fe\u4e0a\u7684\u5bf9\u8c61\u516c\u5f00\uff1f<\/strong>
            \n\u5728JavaScript\u4e2d\uff0c\u539f\u578b\u94fe\u662f\u5b9e\u73b0\u7ee7\u627f\u673a\u5236\u7684\u91cd\u8981\u6982\u5ff5\uff0c\u4f46\u4e5f\u5b58\u5728\u5b89\u5168\u9690\u60a3\u3002\u5982\u679c\u5bf9\u8c61\u7684\u5c5e\u6027\u6216\u65b9\u6cd5\u5728\u539f\u578b\u94fe\u4e0a\u88ab\u516c\u5f00\u8bbf\u95ee\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u610f\u5916\u7684\u6570\u636e\u7be1\u6539\u548c\u4e0d\u5b89\u5168\u7684\u64cd\u4f5c\u3002\u56e0\u6b64\uff0c\u907f\u514d\u539f\u578b\u94fe\u4e0a\u7684\u5bf9\u8c61\u516c\u5f00\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<\/li>\n

          2. \n

            \u5982\u4f55\u907f\u514djavascript\u539f\u578b\u94fe\u4e0a\u7684\u5bf9\u8c61\u516c\u5f00\uff1f<\/strong>
            \n\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u907f\u514djavascript\u539f\u578b\u94fe\u4e0a\u7684\u5bf9\u8c61\u88ab\u516c\u5f00\u8bbf\u95ee\u3002\u9996\u5148\uff0c\u53ef\u4ee5\u4f7f\u7528\u95ed\u5305\u6765\u5c01\u88c5\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u4ece\u800c\u9632\u6b62\u5916\u90e8\u76f4\u63a5\u8bbf\u95ee\u3002\u4f7f\u7528\u95ed\u5305\u53ef\u4ee5\u521b\u5efa\u79c1\u6709\u53d8\u91cf\u548c\u51fd\u6570\uff0c\u53ea\u80fd\u5728\u95ed\u5305\u5185\u90e8\u4f7f\u7528\u3002<\/p>\n<\/li>\n<\/ol>\n

            \u5176\u6b21\uff0c\u53ef\u4ee5\u4f7f\u7528\u6a21\u5757\u5316\u7684\u5f00\u53d1\u65b9\u5f0f\u6765\u7ec4\u7ec7\u4ee3\u7801\u7ed3\u6784\u3002\u5c06\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u5c01\u88c5\u5728\u4e00\u4e2a\u6a21\u5757\u4e2d\uff0c\u5e76\u4e14\u53ea\u5c06\u9700\u8981\u516c\u5f00\u7684\u90e8\u5206\u66b4\u9732\u7ed9\u5916\u90e8\u3002\u8fd9\u6837\u53ef\u4ee5\u6709\u6548\u4fdd\u62a4\u5bf9\u8c61\u7684\u79c1\u6709\u6027\u3002<\/p>\n

            \u53e6\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528ES6\u4e2d\u7684Class\u8bed\u6cd5\u6765\u521b\u5efa\u5bf9\u8c61\uff0c\u5e76\u4f7f\u7528Symbol\u7c7b\u578b\u7684\u5c5e\u6027\u6765\u8868\u660e\u79c1\u6709\u6027\u3002Symbol\u7c7b\u578b\u7684\u5c5e\u6027\u4e0d\u4f1a\u88ab\u610f\u5916\u8bbf\u95ee\u6216\u4fee\u6539\uff0c\u4ece\u800c\u589e\u5f3a\u4e86\u5bf9\u8c61\u7684\u5b89\u5168\u6027\u3002<\/p>\n

              \n
            1. \u5982\u4f55\u786e\u4fddjavascript\u539f\u578b\u94fe\u4e0a\u7684\u5bf9\u8c61\u4e0d\u4f1a\u88ab\u610f\u5916\u8bbf\u95ee\uff1f<\/strong>
              \n\u9664\u4e86\u5bf9\u5bf9\u8c61\u8fdb\u884c\u5c01\u88c5\u548c\u4f7f\u7528\u6a21\u5757\u5316\u7684\u5f00\u53d1\u65b9\u5f0f\u4e4b\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528\u4e25\u683c\u6a21\u5f0f\u6765\u786e\u4fddjavascript\u539f\u578b\u94fe\u4e0a\u7684\u5bf9\u8c61\u4e0d\u4f1a\u88ab\u610f\u5916\u8bbf\u95ee\u3002\u4e25\u683c\u6a21\u5f0f\u53ef\u4ee5\u901a\u8fc7\u5728\u4ee3\u7801\u5f00\u5934\u6dfb\u52a0"use strict"\u6765\u542f\u7528\uff0c\u5b83\u4f1a\u5bf9\u4ee3\u7801\u8fdb\u884c\u66f4\u4e25\u683c\u7684\u8bed\u6cd5\u68c0\u67e5\uff0c\u9632\u6b62\u4e00\u4e9b\u5e38\u89c1\u7684\u9519\u8bef\u548c\u4e0d\u5b89\u5168\u7684\u64cd\u4f5c\u3002<\/li>\n<\/ol>\n

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