{"id":114802,"date":"2026-10-10T09:41:19","date_gmt":"2026-10-10T01:41:19","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/114802.html"},"modified":"2026-10-10T09:41:19","modified_gmt":"2026-10-10T01:41:19","slug":"%e9%9d%a2%e8%af%95%e5%ae%98%e9%97%ae%e6%88%91%ef%bc%9a%e5%b0%8f%e7%a8%8b%e5%ba%8f%e6%b2%a1%e6%9c%89-dom%ef%bc%8creact-%e7%9a%84-e-stoppropagation-%e4%b8%ba%e4%bb%80%e4%b9%88%e8%bf%98%e8%83%bd","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/114802.html","title":{"rendered":"\u9762\u8bd5\u5b98\u95ee\u6211\uff1a\u5c0f\u7a0b\u5e8f\u6ca1\u6709 DOM\uff0cReact \u7684 e.stopPropagation() \u4e3a\u4ec0\u4e48\u8fd8\u80fd\u751f\u6548\uff1f\u6211\u5f53\u573a\u8bb2\u900f\u4e86\u8fd9\u5957\u5408\u6210\u4e8b\u4ef6\u7cfb\u7edf"},"content":{"rendered":"

\u8bf4\u660e：\u672c\u6587\u5206\u6790\u5bf9\u8c61\u4e3a\u5f00\u6e90\u9879\u76ee，\u51fa\u4e8e\u5408\u89c4\u8003\u8651，\u6587\u4e2d\u4ee5\u300c\u8de8\u7aef\u6846\u67b6 A\u300d（\u4e00\u5957\u4ee3\u7801\u7f16\u8bd1\u5230\u591a\u7aef\u7684\u6846\u67b6）\u3001\u300c\u539f\u751f\u7ec4\u4ef6\u5e93 B\u300d（\u67d0\u5c0f\u7a0b\u5e8f\u5e73\u53f0\u5b98\u65b9 UI \u7ec4\u4ef6\u5e93）\u7b49\u4ee3\u79f0\u6307\u4ee3，\u4ee3\u7801\u5747\u4e3a\u91cd\u5199\u540e\u7684\u7b80\u5316\u4f2a\u4ee3\u7801，\u4ec5\u7528\u4e8e\u8bf4\u660e\u8bbe\u8ba1\u601d\u8def，\u4e0e\u771f\u5b9e\u6e90\u7801\u5b58\u5728\u5dee\u5f02\u3002<\/p>\n

\n

\u5f15\u8a00：\u4f60\u5728 React \u91cc\u5199\u7684 e.stopPropagation()，\u4e3a\u4ec0\u4e48\u5728\u5c0f\u7a0b\u5e8f\u91cc\u4e5f\u80fd\u751f\u6548<\/h3>\n

\u5148\u770b\u4e00\u6bb5\u6bcf\u4e2a React \u5f00\u53d1\u8005\u90fd\u5199\u8fc7\u7684\u4ee3\u7801：<\/p>\n

\/\/ \u4e1a\u52a1\u4ee3\u7801：\u70b9\u51fb\u5217\u8868\u9879，\u540c\u65f6\u963b\u6b62\u5916\u5c42\u5bb9\u5668\u7684\u70b9\u51fb\u903b\u8f91<\/span>
\nfunction<\/span> ListItem<\/span>(<\/span>{<\/span> item,<\/span> onSelect }<\/span><\/span>)<\/span> {<\/span>
\n return<\/span> (<\/span>
\n <<\/span>view onClick=<\/span>{<\/span>(<\/span>)<\/span> =><\/span> {<\/span>
\n onSelect<\/span>(<\/span>item)<\/span>
\n }<\/span>}<\/span>><\/span>
\n <<\/span>view className=<\/span>"delete"<\/span> onClick=<\/span>{<\/span>(<\/span>e<\/span>)<\/span> =><\/span> {<\/span>
\n e.<\/span>stopPropagation<\/span>(<\/span>)<\/span> \/\/ \u2190 \u5173\u952e：\u963b\u6b62\u5192\u6ce1<\/span>
\n onDelete<\/span>(<\/span>item)<\/span>
\n }<\/span>}<\/span>><\/span>\u5220\u9664<<\/span>\/<\/span>view><\/span>
\n <<\/span>text><\/span>{<\/span>item.<\/span>name}<\/span><<\/span>\/<\/span>text><\/span>
\n <<\/span>\/<\/span>view><\/span>
\n )<\/span>
\n}<\/span><\/p>\n

\u628a\u8fd9\u6bb5\u4ee3\u7801\u653e\u8fdb\u6d4f\u89c8\u5668，e.stopPropagation() \u5929\u7ecf\u5730\u4e49\u2014\u2014\u56e0\u4e3a\u6d4f\u89c8\u5668\u6709 DOM，\u4e8b\u4ef6\u5929\u7136\u4ece\u6700\u6df1\u7684\u771f\u5b9e\u8282\u70b9\u9010\u7ea7\u5411\u4e0a\u4f20\u64ad，target \u662f\u88ab\u70b9\u7684\u5220\u9664\u6309\u94ae，currentTarget \u662f\u7ed1\u4e86\u56de\u8c03\u7684\u8282\u70b9，\u4e00\u5207\u7531\u6d4f\u89c8\u5668\u5185\u6838\u514d\u8d39\u63d0\u4f9b\u3002<\/p>\n

\u95ee\u9898\u6765\u4e86：\u5c0f\u7a0b\u5e8f\u73af\u5883\u91cc\u6ca1\u6709 DOM\u3002 \u53cc\u7ebf\u7a0b\u67b6\u6784\u4e0b，\u903b\u8f91\u5c42\u62ff\u5230\u7684\u4e0d\u662f\u8282\u70b9\u6811，\u800c\u662f\u4e00\u4e2a\u4e2a\u300c\u9875\u9762\/\u7ec4\u4ef6\u5b9e\u4f8b\u300d\u548c\u4e00\u5768 JSON \u5316\u7684\u4e8b\u4ef6\u5bf9\u8c61\u3002\u539f\u751f\u4e8b\u4ef6\u6ca1\u6709 target \u6811\u3001\u6ca1\u6709 currentTarget\u3001\u66f4\u6ca1\u6709\u5192\u6ce1\u94fe\u2014\u2014stopPropagation \u8fd9\u4e2a API \u5728\u539f\u751f\u5c0f\u7a0b\u5e8f\u7684\u4e16\u754c\u91cc\u538b\u6839\u4e0d\u5b58\u5728\u3002<\/p>\n

\u4f46\u7528\u8de8\u7aef\u6846\u67b6 A \u5199\u7684\u4e1a\u52a1\u4ee3\u7801，\u4e0a\u9762\u90a3\u6bb5 JSX \u8dd1\u5728\u5c0f\u7a0b\u5e8f\u4e0a\u4e00\u5207\u6b63\u5e38：e.target.dataset \u80fd\u53d6\u5230，e.stopPropagation() \u80fd\u62e6\u4f4f\u7236\u7ea7\u56de\u8c03，\u4e8b\u4ef6\u59d4\u6258\u7684\u5199\u6cd5\u4e5f\u80fd\u5de5\u4f5c\u3002<\/p>\n

\u8fd9\u7bc7\u6587\u7ae0\u53ea\u8bb2\u4e00\u4ef6\u4e8b：\u6846\u67b6 A \u7684\u8fd0\u884c\u65f6\u662f\u600e\u4e48\u5728\u65e0 DOM \u7684\u73af\u5883\u91cc，\u628a DOM \u4e8b\u4ef6\u8bed\u4e49\u4e00\u5c42\u5c42\u300c\u9a97\u300d\u51fa\u6765\u7684\u3002\u5168\u6587\u56f4\u7ed5\u56db\u4e2a\u95ee\u9898\u5c55\u5f00：<\/p>\n

  • \u539f\u751f\u4e8b\u4ef6\u8fdb\u6765，\u6846\u67b6\u5728\u54ea\u63a5\u4f4f\u5b83？（\u4e8b\u4ef6\u4e2d\u5fc3\u4e0e\u94a9\u5b50\u6ce8\u5165）<\/li>\n
  • e.target \/ e.currentTarget \u5230\u5e95\u662f\u4ec0\u4e48？（\u5408\u6210\u4e8b\u4ef6\u5bf9\u8c61\u7684\u60f0\u6027\u6c42\u503c）<\/li>\n
  • \u4e8b\u4ef6\u600e\u4e48\u627e\u5230\u300c\u88ab\u70b9\u7684\u662f\u865a\u62df\u6811\u4e0a\u54ea\u4e2a\u8282\u70b9\u300d？（sid \u53cd\u67e5）<\/li>\n
  • \u6355\u83b7-\u5192\u6ce1-\u59d4\u6258\u8bed\u4e49\u600e\u4e48\u6a21\u62df\u51fa\u6765？（\u4e8b\u4ef6\u94fe\u8def\u91cd\u5efa）<\/li>\n

    \u4ee5\u53ca\u6700\u540e\u548c\u539f\u751f\u7ec4\u4ef6\u5e93 B \u7684\u5bf9\u7167：\u540c\u4e00\u4e2a\u300c\u4ea4\u4e92\u6027\u80fd\u300d\u95ee\u9898，\u4e24\u6761\u8def\u7ebf\u7ed9\u51fa\u4e86\u622a\u7136\u76f8\u53cd\u7684\u7b54\u6848\u3002<\/p>\n

    \n

    \u4e00\u3001\u4e8b\u4ef6\u4e2d\u5fc3：\u65e0 DOM \u73af\u5883\u91cc\u7684\u7b2c\u4e00\u9053\u5173\u5361<\/h3>\n

    1.1 \u5c0f\u7a0b\u5e8f\u4e8b\u4ef6\u7684\u539f\u59cb\u5f62\u6001<\/h4>\n

    \u5148\u5bf9\u9f50\u4e8b\u5b9e\u3002\u5c0f\u7a0b\u5e8f\u539f\u751f\u4e8b\u4ef6\u4f20\u9012\u5230\u903b\u8f91\u5c42\u65f6，\u957f\u4ec0\u4e48\u6837（\u7b80\u5316）：<\/p>\n

    \u6e32\u67d3\u5c42（\u7528\u6237\u70b9\u51fb）
    \n \u2502 \u5e73\u53f0\u6865
    \n \u25bc
    \n\u903b\u8f91\u5c42\u6536\u5230：
    \n{
    \n type: 'tap',
    \n detail: { x: 120, y: 340 },
    \n target: { id: '', dataset: { sid: 'a-3f-12' } }, \/\/ \u4ec5\u539f\u6837\u5e26\u56de\u7ed1\u5b9a\u65f6\u8bbe\u7f6e\u7684 dataset
    \n currentTarget: { dataset: { sid: 'a-3f-12' } },
    \n …
    \n}<\/p>\n

    \u6ce8\u610f\u4e24\u4e2a\u81f4\u547d\u7f3a\u9677：<\/p>\n

      \n
    • \u8fd9\u4e2a target \u662f\u6e32\u67d3\u5c42\u6a21\u677f\u8282\u70b9\u7684\u4fe1\u606f，\u4e0d\u662f\u903b\u8f91\u5c42\u4efb\u4f55\u5bf9\u8c61\u2014\u2014\u903b\u8f91\u5c42\u6ca1\u6709\u4e00\u68f5\u6811\u53ef\u4ee5\u6307\u7740\u8bf4\u300c\u5c31\u662f\u5b83\u300d；<\/li>\n
    • \u5b83\u4e0d\u4f1a\u5192\u6ce1\u5230\u6846\u67b6\u5c42\u3002\u539f\u751f\u7ed1\u5b9a\u54ea\u4e2a\u8282\u70b9，\u56de\u8c03\u5c31\u6302\u5728\u54ea\u4e2a\u8282\u70b9\u4e0a，\u9010\u7ea7\u5411\u4e0a\u4f20\u9012\u7ed1\u5b9a\u7684\u8bed\u4e49\u9700\u8981\u6846\u67b6\u81ea\u5df1\u7ec4\u7ec7\u3002<\/li>\n<\/ul>\n

      \u6240\u4ee5\u8de8\u7aef\u6846\u67b6\u5fc5\u987b\u5728\u903b\u8f91\u5c42\u91cd\u5efa\u4e00\u4e2a\u300c\u63a5\u4e8b\u4ef6\u7684\u5165\u53e3\u300d\u3002\u6846\u67b6 A \u7684\u505a\u6cd5\u662f：\u8fd0\u884c\u65f6\u91cc\u6709\u4e00\u4e2a\u4e8b\u4ef6\u4e2d\u5fc3，\u6240\u6709\u5e73\u53f0\u539f\u751f\u4e8b\u4ef6\u5148\u6253\u5230\u4e8b\u4ef6\u4e2d\u5fc3，\u518d\u7531\u5b83\u7edf\u4e00\u5206\u53d1\u7ed9\u6846\u67b6\u5c42\u3002<\/p>\n

      \u5e73\u53f0\u539f\u751f\u4e8b\u4ef6（tap\/touchmove\/…）
      \n \u2502
      \n \u25bc
      \n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
      \n\u2502 \u4e8b\u4ef6\u4e2d\u5fc3（\u8fd0\u884c\u65f6\u7684\u53ef\u66ff\u6362\u7ec4\u4ef6） \u2502
      \n\u2502 – \u6536\u4e8b\u4ef6 \u2502
      \n\u2502 – \u67e5\u8282\u70b9\u7f13\u5b58 \u2502
      \n\u2502 – \u6784\u9020\u5408\u6210\u4e8b\u4ef6\u5bf9\u8c61 \u2502
      \n\u2502 – \u6a21\u62df\u6355\u83b7\u2192\u5192\u6ce1 \u2502
      \n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518
      \n \u2502
      \n \u25bc
      \n \u6846\u67b6\u5c42（React\/Vue \u7684\u5408\u6210\u4e8b\u4ef6\u5904\u7406）<\/p>\n

      1.2 \u4e8b\u4ef6\u4e2d\u5fc3\u672c\u8eab\u662f\u4e2a\u94a9\u5b50\u6ce8\u5165\u70b9<\/h4>\n

      \u8fd9\u91cc\u6709\u4e00\u4e2a\u5bb9\u6613\u88ab\u5ffd\u7565\u3001\u4f46\u67b6\u6784\u4e0a\u975e\u5e38\u91cd\u8981\u7684\u7ec6\u8282：\u4e8b\u4ef6\u4e2d\u5fc3\u4e0d\u662f\u8fd0\u884c\u65f6\u786c\u7f16\u7801\u7684，\u5b83\u672c\u8eab\u5c31\u662f\u4e00\u4e2a\u53ef\u66ff\u6362\u7684\u94a9\u5b50\u70b9\u3002<\/p>\n

      \u6846\u67b6 A \u7684\u8fd0\u884c\u65f6\u6838\u5fc3\u4ee3\u7801\u91cc\u627e\u4e0d\u5230\u4efb\u4f55\u300c\u5177\u4f53 UI \u6846\u67b6\u300d\u7684 import\u2014\u2014\u6ca1\u6709 React，\u6ca1\u6709 Vue\u3002\u8fd0\u884c\u65f6\u5b9a\u4e49\u4e86\u4e00\u7ec4\u751f\u547d\u5468\u671f\u94a9\u5b50，\u5176\u4e2d\u5c31\u5305\u62ec\u4e8b\u4ef6\u7cfb\u7edf\u7684\u5b9e\u73b0\u5165\u53e3\u3002\u5404 UI \u6846\u67b6\u7684\u6865\u63a5\u5305\u5728\u521d\u59cb\u5316\u65f6，\u901a\u8fc7 hooks.call(…) \u628a\u81ea\u5df1\u7684\u4e8b\u4ef6\u5904\u7406\u5b9e\u73b0\u6ce8\u5165\u8fdb\u6765：<\/p>\n

      \/\/ \u7b80\u5316\u4f2a\u4ee3\u7801：\u4e8b\u4ef6\u4e2d\u5fc3\u901a\u8fc7\u94a9\u5b50\u7cfb\u7edf\u83b7\u53d6\u5b9e\u73b0<\/span>
      \n\/\/ \u8fd0\u884c\u65f6\u6838\u5fc3（\u4e0d\u8ba4\u8bc6\u4efb\u4f55 UI \u6846\u67b6）<\/span>
      \nclass<\/span> EventCenter<\/span> {<\/span>
      \n handleNativeEvent<\/span>(<\/span>nativeEvent,<\/span> page<\/span>)<\/span> {<\/span>
      \n \/\/ \u901a\u8fc7\u94a9\u5b50\u62ff\u5230\u300c\u7531 UI \u6846\u67b6\u6865\u63a5\u5305\u6ce8\u5165\u300d\u7684\u4e8b\u4ef6\u5904\u7406\u5b9e\u73b0<\/span>
      \n const<\/span> dispatch =<\/span> hooks<\/span>.<\/span>call<\/span>(<\/span>'onEvent'<\/span>,<\/span> nativeEvent,<\/span> page)<\/span>
      \n return<\/span> dispatch
      \n }<\/span>
      \n}<\/span><\/p>\n

      \/\/ \u7b80\u5316\u4f2a\u4ee3\u7801：UI \u6846\u67b6\u6865\u63a5\u5305\u6ce8\u5165\u5b9e\u73b0<\/span>
      \n\/\/ \u67d0\u4e2a UI \u6846\u67b6\u7684\u6865\u63a5\u5305\u521d\u59cb\u5316\u65f6<\/span>
      \nhooks.<\/span>tap<\/span>(<\/span>'onEvent'<\/span>,<\/span> (<\/span>nativeEvent,<\/span> page<\/span>)<\/span> =><\/span> {<\/span>
      \n \/\/ \u6846\u67b6\u81ea\u5df1\u7684\u5408\u6210\u4e8b\u4ef6\u6784\u9020 + \u5206\u53d1\u903b\u8f91<\/span>
      \n const<\/span> syntheticEvent =<\/span> buildSyntheticEvent<\/span>(<\/span>nativeEvent)<\/span>
      \n return<\/span> dispatchThroughBubbles<\/span>(<\/span>syntheticEvent)<\/span>
      \n}<\/span>)<\/span><\/p>\n

      \u8fd9\u6837\u8bbe\u8ba1\u7684\u6536\u76ca\u662f：\u8fd0\u884c\u65f6\u96f6\u4f9d\u8d56\u5177\u4f53\u6846\u67b6\u3002 React \u6865\u63a5\u5305\u6ce8\u5165 React \u7684\u4e8b\u4ef6\u8bed\u4e49（\u6bd4\u5982\u5408\u6210\u4e8b\u4ef6\u6c60\u3001onXxx \u547d\u540d\u6620\u5c04），Vue \u6865\u63a5\u5305\u6ce8\u5165 Vue \u7684\u8bed\u4e49\u3002\u4e8b\u4ef6\u7cfb\u7edf\u8fd9\u79cd\u300c\u6bcf\u4e2a\u6846\u67b6\u884c\u4e3a\u90fd\u7565\u6709\u5dee\u5f02\u300d\u7684\u5730\u65b9，\u6070\u6070\u662f\u6700\u9700\u8981\u53ef\u66ff\u6362\u7684\u2014\u2014\u5982\u679c\u5199\u6b7b\u5728\u8fd0\u884c\u65f6\u91cc，\u6bcf\u63a5\u4e00\u4e2a\u65b0\u6846\u67b6\u5c31\u8981\u6539\u5185\u6838，\u63d2\u4ef6\u5f0f\u67b6\u6784\u5c31\u540d\u5b58\u5b9e\u4ea1\u4e86\u3002<\/p>\n

      \u4e00\u53e5\u8bdd\u603b\u7ed3\u8fd9\u4e00\u5c42\u7684\u5206\u5de5：<\/p>\n

        \n
      • \u8fd0\u884c\u65f6\u63d0\u4f9b\u300c\u63a5\u4e8b\u4ef6 + \u53cd\u67e5\u8282\u70b9 + \u6784\u9020\u901a\u7528\u5408\u6210\u4e8b\u4ef6\u300d\u7684\u5e95\u5ea7；<\/li>\n
      • UI \u6846\u67b6\u6865\u63a5\u5305\u51b3\u5b9a\u300c\u62ff\u5230\u5408\u6210\u4e8b\u4ef6\u540e\u600e\u4e48\u5206\u53d1\u3001\u600e\u4e48\u6620\u5c04\u5230\u7ec4\u4ef6\u6811\u56de\u8c03\u300d\u3002<\/li>\n<\/ul>\n

        1.3 \u9762\u8bd5\u8bdd\u672f\u5c0f\u7ed3<\/h4>\n

        \u4e00\u53e5\u8bdd\u7248：
        \n\u201c\u5c0f\u7a0b\u5e8f\u903b\u8f91\u5c42\u6ca1\u6709 DOM，\u4e8b\u4ef6\u53ea\u662f JSON \u5316\u7684\u5bf9\u8c61\u3002\u6846\u67b6 A \u5728\u8fd0\u884c\u65f6\u5efa\u4e86\u4e00\u4e2a\u4e8b\u4ef6\u4e2d\u5fc3\u4f5c\u4e3a\u6240\u6709\u539f\u751f\u4e8b\u4ef6\u7684\u7edf\u4e00\u5165\u53e3，\u4e8b\u4ef6\u4e2d\u5fc3\u672c\u8eab\u901a\u8fc7\u94a9\u5b50\u7cfb\u7edf\u6ce8\u5165\u5b9e\u73b0，\u7531\u5404 UI \u6846\u67b6\u7684\u6865\u63a5\u5305\u66ff\u6362，\u8fd0\u884c\u65f6\u6838\u5fc3\u96f6\u4f9d\u8d56\u5177\u4f53\u6846\u67b6\u3002\u201d<\/p>\n

        \u6df1\u5165\u7248：
        \n\u201c\u539f\u751f\u4e8b\u4ef6\u7684 target \u53ea\u662f\u6e32\u67d3\u5c42\u6a21\u677f\u8282\u70b9\u7684 dataset \u5feb\u7167，\u903b\u8f91\u5c42\u6ca1\u6709\u4efb\u4f55\u6811\u7ed3\u6784\u53ef\u4ee5\u5bf9\u5e94\u3002\u6846\u67b6\u7684\u505a\u6cd5\u662f\u628a\u4e8b\u4ef6\u4e2d\u5fc3\u8bbe\u8ba1\u6210\u94a9\u5b50\u6ce8\u5165\u70b9：\u8fd0\u884c\u65f6\u901a\u8fc7 hooks.call \u62ff\u5230\u7531\u6865\u63a5\u5305\u6ce8\u518c\u7684\u4e8b\u4ef6\u5206\u53d1\u5b9e\u73b0，React\/Vue \u5404\u81ea\u6ce8\u5165\u81ea\u5df1\u7684\u4e8b\u4ef6\u8bed\u4e49\u3002\u8fd9\u6837\u4e8b\u4ef6\u7cfb\u7edf\u8fd9\u7c7b\u6846\u67b6\u95f4\u884c\u4e3a\u5dee\u5f02\u6700\u5927\u7684\u6a21\u5757\u5929\u7136\u53ef\u66ff\u6362，\u662f\u8fd0\u884c\u65f6\u4e0d\u7ed1\u5b9a UI \u6846\u67b6\u7684\u5173\u952e\u8bbe\u8ba1\u3002\u201d<\/p>\n

        \n

        \u4e8c\u3001\u5408\u6210\u4e8b\u4ef6\u5bf9\u8c61：target\/currentTarget \u662f\u300c\u7b97\u51fa\u6765\u300d\u7684<\/h3>\n

        2.1 \u4e0d\u662f\u5b57\u6bb5，\u662f getter<\/h4>\n

        \u63a5\u4f4f\u4e8b\u4ef6\u4e4b\u540e，\u7b2c\u4e00\u4ef6\u4e8b\u662f\u628a\u539f\u751f JSON \u5305\u88c5\u6210 React\/Vue \u5f00\u53d1\u8005\u719f\u6089\u7684\u5408\u6210\u4e8b\u4ef6\u5bf9\u8c61\u3002\u6846\u67b6 A \u5b9e\u73b0\u91cc\u6709\u4e2a\u975e\u5e38\u503c\u5f97\u7ec6\u770b\u7684\u8bbe\u8ba1：target \u548c currentTarget \u4e0d\u662f\u7b80\u5355\u7684\u5bf9\u8c61\u5b57\u6bb5，\u800c\u662f\u7528 getter \u505a\u60f0\u6027\u6c42\u503c\u2014\u2014\u8bbf\u95ee\u65f6\u624d\u8ba1\u7b97，\u8ba1\u7b97\u8fc7\u5c31\u7f13\u5b58\u3002<\/p>\n

        \/\/ \u7b80\u5316\u4f2a\u4ee3\u7801：\u5408\u6210\u4e8b\u4ef6\u5bf9\u8c61\u7684\u60f0\u6027\u6c42\u503c<\/span>
        \nclass<\/span> SyntheticEvent<\/span> {<\/span>
        \n constructor<\/span>(<\/span>nativeEvent,<\/span> eventPath<\/span>)<\/span> {<\/span>
        \n this<\/span>.<\/span>type =<\/span> nativeEvent.<\/span>type
        \n this<\/span>.<\/span>detail =<\/span> nativeEvent.<\/span>detail
        \n this<\/span>.<\/span>_eventPath =<\/span> eventPath \/\/ \u540e\u6587\u8bb2\u5230\u7684\u5192\u6ce1\u8def\u5f84（\u8282\u70b9\u5217\u8868）<\/span>
        \n this<\/span>.<\/span>_targetCache =<\/span> null<\/span>
        \n this<\/span>.<\/span>_currentTargetCache =<\/span> null<\/span>
        \n }<\/span><\/p>\n

        get<\/span> target<\/span>(<\/span>)<\/span> {<\/span>
        \n \/\/ \u4e0d\u8bbf\u95ee\u5c31\u4e0d\u8ba1\u7b97；\u8bbf\u95ee\u65f6\u628a\u6e32\u67d3\u5c42\u8282\u70b9\u4fe1\u606f<\/span>
        \n \/\/ \u7ffb\u8bd1\u6210\u865a\u62df\u6811\u4e0a\u771f\u5b9e\u7684\u6846\u67b6\u8282\u70b9<\/span>
        \n if<\/span> (<\/span>this<\/span>.<\/span>_targetCache ===<\/span> null<\/span>)<\/span> {<\/span>
        \n this<\/span>.<\/span>_targetCache =<\/span> resolveNode<\/span>(<\/span>this<\/span>.<\/span>_eventPath[<\/span>0<\/span>]<\/span>)<\/span>
        \n }<\/span>
        \n return<\/span> this<\/span>.<\/span>_targetCache
        \n }<\/span><\/p>\n

        get<\/span> currentTarget<\/span>(<\/span>)<\/span> {<\/span>
        \n \/\/ \u5192\u6ce1\u8def\u5f84\u4e0a\u300c\u5f53\u524d\u6b63\u5728\u6267\u884c\u56de\u8c03\u300d\u7684\u90a3\u4e2a\u8282\u70b9<\/span>
        \n if<\/span> (<\/span>this<\/span>.<\/span>_currentTargetCache ===<\/span> null<\/span>)<\/span> {<\/span>
        \n this<\/span>.<\/span>_currentTargetCache =<\/span> resolveNode<\/span>(<\/span>this<\/span>.<\/span>_eventPath[<\/span>this<\/span>.<\/span>_currentIndex]<\/span>)<\/span>
        \n }<\/span>
        \n return<\/span> this<\/span>.<\/span>_currentTargetCache
        \n }<\/span>
        \n}<\/span><\/p>\n

        \u4e3a\u4ec0\u4e48\u8fd9\u4e48\u8bbe\u8ba1？\u4e24\u4e2a\u52a8\u673a：<\/p>\n

        （1）\u53cd\u67e5\u662f\u6709\u6210\u672c\u7684，\u6ca1\u5fc5\u8981\u6bcf\u4e2a\u4e8b\u4ef6\u90fd\u505a\u3002 target \u7684\u8ba1\u7b97\u4f9d\u8d56\u300c\u6e32\u67d3\u5c42\u6807\u8bc6 \u2192 \u865a\u62df\u6811\u8282\u70b9\u300d\u7684\u53cd\u67e5（\u4e0b\u4e00\u8282\u5c55\u5f00）\u3002\u5f88\u591a\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u6839\u672c\u4e0d\u8bfb e.target\u2014\u2014\u53ea\u8c03\u7528\u4e00\u4e0b setState \u5c31\u5b8c\u4e86\u3002\u60f0\u6027\u6c42\u503c\u610f\u5473\u7740：\u4e0d\u8bbf\u95ee target，\u4e00\u6b21\u53cd\u67e5\u90fd\u4e0d\u4f1a\u53d1\u751f\u3002 \u9ad8\u9891\u4e8b\u4ef6（touchmove\u3001\u6eda\u52a8）\u4e0b，\u8fd9\u4e2a\u7701\u7565\u662f\u5b9e\u6253\u5b9e\u7684\u6027\u80fd\u6536\u76ca\u3002<\/p>\n

        （2）\u7f13\u5b58\u4fdd\u8bc1\u8bed\u4e49\u4e00\u81f4\u3002 \u540c\u4e00\u4e2a\u4e8b\u4ef6\u5bf9\u8c61\u5728\u5192\u6ce1\u8fc7\u7a0b\u4e2d\u4f1a\u7ecf\u8fc7\u591a\u4e2a\u56de\u8c03\u3002\u7b2c\u4e00\u4e2a\u56de\u8c03\u8bfb\u4e86 e.target \u89e6\u53d1\u8ba1\u7b97\u5e76\u7f13\u5b58，\u540e\u7eed\u56de\u8c03\u62ff\u5230\u7684\u6c38\u8fdc\u662f\u540c\u4e00\u4e2a\u8282\u70b9\u5f15\u7528\u2014\u2014\u548c DOM \u4e8b\u4ef6\u300ctarget \u5728\u6574\u4e2a\u4f20\u64ad\u8fc7\u7a0b\u4e2d\u4e0d\u53d8\u300d\u7684\u8bed\u4e49\u5b8c\u5168\u5bf9\u9f50\u3002<\/p>\n

        2.2 currentTarget \u662f\u300c\u968f\u4f20\u64ad\u6d41\u52a8\u300d\u7684<\/h4>\n

        \u5bf9\u7167\u4e00\u4e0b DOM \u8bed\u4e49，\u8fd9\u4e24\u8005\u7684\u533a\u522b\u662f：<\/p>\n

          \n
        • target：\u89e6\u53d1\u4e8b\u4ef6\u7684\u539f\u59cb\u8282\u70b9，\u6574\u4e2a\u4f20\u64ad\u8fc7\u7a0b\u4e2d\u4e0d\u53d8；<\/li>\n
        • currentTarget：\u5f53\u524d\u6b63\u5728\u6267\u884c\u56de\u8c03\u7684\u90a3\u4e2a\u8282\u70b9，\u5192\u6ce1\u5230\u7236\u7ea7\u65f6，\u7236\u7ea7\u56de\u8c03\u91cc\u8bfb\u5230\u7684 currentTarget \u662f\u7236\u8282\u70b9\u3002<\/li>\n<\/ul>\n

          \u5728\u6d4f\u89c8\u5668\u91cc\u8fd9\u4e24\u4e2a\u503c\u7531\u5185\u6838\u7ef4\u62a4；\u5728\u6846\u67b6 A \u91cc，target \u53d6\u5192\u6ce1\u8def\u5f84\u7684\u7b2c 0 \u4e2a\u8282\u70b9，currentTarget \u53d6\u8def\u5f84\u4e0a\u300c\u5f53\u524d\u6267\u884c\u6307\u9488\u300d\u6307\u5411\u7684\u8282\u70b9\u3002\u5192\u6ce1\u5faa\u73af\u6bcf\u524d\u8fdb\u4e00\u5c42，\u6307\u9488\u53f3\u79fb\u4e00\u4f4d\u2014\u2014\u4e8e\u662f\u5f00\u53d1\u8005\u5199 e.currentTarget.dataset \u65f6，\u62ff\u5230\u7684\u6b63\u662f\u300c\u7ed1\u5b9a\u8fd9\u4e2a\u56de\u8c03\u7684\u8282\u70b9\u300d\u7684 dataset，\u548c\u6d4f\u89c8\u5668\u884c\u4e3a\u4e00\u81f4\u3002<\/p>\n

          \u5192\u6ce1\u8def\u5f84（\u6355\u83b7\u540e\u4ece\u6700\u6df1\u5904\u5411\u4e0a）：
          \n [view-item] \u2192 [view-list] \u2192 [view-page]
          \n \u25b2 target \u56fa\u5b9a\u5728\u8fd9\u91cc<\/p>\n

          \u4e8b\u4ef6\u4f20\u64ad\u8fc7\u7a0b\u4e2d currentIndex \u53d8\u5316：
          \n \u56de\u8c03\u6267\u884c\u5728 view-item \u2192 currentTarget = view-item
          \n \u56de\u8c03\u6267\u884c\u5728 view-list \u2192 currentTarget = view-list<\/p>\n

          2.3 stopPropagation：\u4e00\u4e2a\u6807\u5fd7\u4f4d\u7684\u4e8b<\/h4>\n

          \u6709\u4e86\u5192\u6ce1\u5faa\u73af，stopPropagation() \u7684\u5b9e\u73b0\u53cd\u800c\u6700\u7b80\u5355\u2014\u2014\u5b83\u5c31\u662f\u5728\u5408\u6210\u4e8b\u4ef6\u5bf9\u8c61\u4e0a\u6253\u4e00\u4e2a\u6807\u5fd7\u4f4d，\u5192\u6ce1\u5faa\u73af\u6bcf\u6267\u884c\u5b8c\u4e00\u5c42\u56de\u8c03\u5c31\u68c0\u67e5\u5b83：<\/p>\n

          \/\/ \u7b80\u5316\u4f2a\u4ee3\u7801：\u5192\u6ce1\u5faa\u73af（\u7b80\u5316\u7248，\u5b8c\u6574\u7248\u89c1\u7b2c\u56db\u8282）<\/span>
          \nfor<\/span> (<\/span>let<\/span> i =<\/span> path.<\/span>length –<\/span> 1<\/span>;<\/span> i >=<\/span> 0<\/span>;<\/span> i—<\/span>)<\/span> {<\/span>
          \n if<\/span> (<\/span>event.<\/span>_stopped)<\/span> break<\/span> \/\/ \u2190 stopPropagation \u7684\u751f\u6548\u70b9<\/span>
          \n event.<\/span>_currentIndex =<\/span> i \/\/ currentTarget \u6307\u9488\u53f3\u79fb<\/span>
          \n const<\/span> node =<\/span> path[<\/span>i]<\/span>
          \n invoke<\/span>(<\/span>node,<\/span> event)<\/span> \/\/ \u6267\u884c\u8be5\u8282\u70b9\u4e0a\u7ed1\u5b9a\u7684\u56de\u8c03<\/span>
          \n}<\/span><\/p>\n

          \u56de\u5934\u770b\u5f15\u8a00\u91cc\u7684\u90a3\u6bb5\u4e1a\u52a1\u4ee3\u7801：e.stopPropagation() \u5728\u5220\u9664\u6309\u94ae\u7684\u56de\u8c03\u91cc\u88ab\u8c03\u7528 \u2192 \u6807\u5fd7\u4f4d\u7ffb\u8f6c \u2192 \u5192\u6ce1\u5faa\u73af\u5728\u6267\u884c\u5230\u5916\u5c42 view \u524d\u4e2d\u65ad \u2192 onSelect \u4e0d\u4f1a\u6267\u884c\u3002\u6574\u6761\u94fe\u8def\u91cc\u6ca1\u6709\u4e00\u884c\u5e73\u53f0\u4ee3\u7801\u53c2\u4e0e，\u5168\u90e8\u53d1\u751f\u5728\u903b\u8f91\u5c42\u7684\u6a21\u62df\u5c42\u91cc\u3002<\/p>\n

          2.4 \u9762\u8bd5\u8bdd\u672f\u5c0f\u7ed3<\/h4>\n

          \u4e00\u53e5\u8bdd\u7248：
          \n\u201c\u5408\u6210\u4e8b\u4ef6\u5bf9\u8c61\u91cc target \u548c currentTarget \u4e0d\u662f\u666e\u901a\u5b57\u6bb5，\u662f getter \u60f0\u6027\u6c42\u503c\u52a0\u7f13\u5b58：\u4e0d\u8bfb\u4e0d\u53cd\u67e5\u3001\u8bfb\u4e86\u7b97\u4e00\u6b21\u540e\u56fa\u5316\u3002target \u56fa\u5b9a\u6307\u5411\u5192\u6ce1\u8def\u5f84\u8d77\u70b9，currentTarget \u8ddf\u7740\u4f20\u64ad\u6307\u9488\u6d41\u52a8，stopPropagation \u5c31\u662f\u4e00\u4e2a\u6807\u5fd7\u4f4d\u8ba9\u5192\u6ce1\u5faa\u73af\u63d0\u524d\u9000\u51fa\u3002\u201d<\/p>\n

          \u6df1\u5165\u7248：
          \n\u201c\u60f0\u6027\u6c42\u503c\u7684\u52a8\u673a\u662f\u53cd\u67e5\u6709\u6210\u672c：touchmove \u8fd9\u7c7b\u9ad8\u9891\u4e8b\u4ef6\u591a\u6570\u56de\u8c03\u4e0d\u8bfb target，getter \u4fdd\u8bc1\u4e0d\u8bbf\u95ee\u5c31\u4e0d\u8ba1\u7b97\u3002\u7f13\u5b58\u8fd8\u4fdd\u8bc1\u591a\u6b21\u8bbf\u95ee\u62ff\u5230\u540c\u4e00\u8282\u70b9\u5f15\u7528，\u5bf9\u9f50 DOM 'target \u4f20\u64ad\u8fc7\u7a0b\u4e2d\u4e0d\u53d8\u2019\u7684\u8bed\u4e49\u3002currentTarget \u7684\u5b9e\u73b0\u4f9d\u8d56\u5192\u6ce1\u8def\u5f84\u4e0a\u7684\u6267\u884c\u6307\u9488\u2014\u2014\u6bcf\u524d\u8fdb\u4e00\u5c42\u6307\u9488\u53f3\u79fb，getter \u8bfb\u6307\u9488\u4f4d\u7f6e\u53cd\u67e5\u8282\u70b9\u3002stopPropagation \u4e0d\u9700\u8981\u5e73\u53f0\u4efb\u4f55\u914d\u5408，\u5192\u6ce1\u5faa\u73af\u6bcf\u5c42\u68c0\u67e5\u6807\u5fd7\u4f4d\u5373\u53ef，\u6574\u4e2a\u8bed\u4e49\u5b8c\u5168\u5728\u903b\u8f91\u5c42\u6a21\u62df\u51fa\u6765\u3002\u201d<\/p>\n

          \n

          \u4e09\u3001sid \u53cd\u67e5：\u4e8b\u4ef6\u600e\u4e48\u627e\u56de\u865a\u62df\u6811\u4e0a\u7684\u8282\u70b9<\/h3>\n

          3.1 \u95ee\u9898：\u903b\u8f91\u5c42\u6536\u5230\u7684\u662f\u300c\u6807\u8bc6\u300d，\u4e0d\u662f\u300c\u8282\u70b9\u300d<\/h4>\n

          \u73b0\u5728\u5230\u4e86\u6574\u5957\u673a\u5236\u6700\u6838\u5fc3\u7684\u96be\u9898\u3002\u5192\u6ce1\u8def\u5f84\u3001target\u3001currentTarget，\u5168\u90fd\u6307\u5411\u4e00\u4e2a\u524d\u63d0：\u903b\u8f91\u5c42\u8981\u6709\u4e00\u68f5\u6811，\u4e14\u4e8b\u4ef6\u80fd\u5b9a\u4f4d\u5230\u6811\u4e0a\u7684\u8282\u70b9\u3002<\/p>\n

          \u53ef\u539f\u751f\u4e8b\u4ef6\u5e26\u6765\u7684\u53ea\u6709 JSON\u3002\u6e32\u67d3\u5c42\u77e5\u9053\u4f60\u70b9\u4e86\u54ea\u4e2a\u6a21\u677f\u8282\u70b9，\u4f46\u5b83\u6ca1\u529e\u6cd5\u628a\u300c\u8282\u70b9\u300d\u4f20\u8fc7\u53cc\u7ebf\u7a0b\u2014\u2014\u7ebf\u7a0b\u4e4b\u95f4\u53ea\u4f20\u53ef\u5e8f\u5217\u5316\u6570\u636e\u3002<\/p>\n

          \u6846\u67b6 A \u7684\u89e3\u6cd5\u662f\u7ecf\u5178\u7684\u6807\u8bc6\u53cd\u67e5，\u5206\u4e24\u6b65：<\/p>\n

          \u7b2c\u4e00\u6b65：\u7ed1\u5b9a\u53d1\u751f\u65f6，\u628a\u6807\u8bc6\u5199\u5230\u8282\u70b9\u4e0a\u3002 \u4e8b\u4ef6\u7ed1\u5b9a\u7684\u672c\u8d28\u662f\u300c\u5728\u67d0\u4e2a\u865a\u62df\u8282\u70b9\u4e0a\u6302\u4e00\u4e2a\u56de\u8c03\u300d\u3002\u6846\u67b6\u5728\u5efa\u7acb\u7ed1\u5b9a\u65f6，\u7ed9\u6bcf\u4e2a\u7ed1\u5b9a\u4e86\u4e8b\u4ef6\u7684\u8282\u70b9\u751f\u6210\u4e00\u4e2a\u7a33\u5b9a\u6807\u8bc6（\u4e0b\u6587\u7edf\u79f0 sid），\u5e76\u5728\u628a\u865a\u62df\u6811\u5e8f\u5217\u5316\u4e3a\u6e32\u67d3\u6570\u636e\u65f6，\u628a sid \u585e\u8fdb\u5bf9\u5e94\u6e32\u67d3\u8282\u70b9\u7684 dataset：<\/p>\n

          \/\/ \u7b80\u5316\u4f2a\u4ee3\u7801：\u7ed1\u5b9a\u4e8b\u4ef6\u65f6\u767b\u8bb0\u6807\u8bc6<\/span>
          \nfunction<\/span> bindEvent<\/span>(<\/span>node,<\/span> eventType,<\/span> handler<\/span>)<\/span> {<\/span>
          \n node.<\/span>_sid =<\/span> node.<\/span>_sid ||<\/span> genId<\/span>(<\/span>)<\/span> \/\/ \u8282\u70b9\u9996\u6b21\u7ed1\u5b9a\u4e8b\u4ef6\u65f6\u5206\u914d sid<\/span>
          \n node.<\/span>_handlers[<\/span>eventType]<\/span>.<\/span>push<\/span>(<\/span>handler)<\/span>
          \n \/\/ \u540c\u65f6\u5728\u8282\u70b9\u7f13\u5b58\u8868\u91cc\u767b\u8bb0：sid \u2192 \u865a\u62df\u8282\u70b9<\/span>
          \n nodeCache.<\/span>set<\/span>(<\/span>node.<\/span>_sid,<\/span> node)<\/span>
          \n return<\/span> node.<\/span>_sid
          \n}<\/span><\/p>\n

          \/\/ \u865a\u62df\u6811 \u2192 \u6e32\u67d3\u6570\u636e\u65f6，sid \u968f dataset \u4e0b\u53d1<\/span>
          \nfunction<\/span> serialize<\/span>(<\/span>node<\/span>)<\/span> {<\/span>
          \n return<\/span> {<\/span>
          \n tag<\/span>:<\/span> node.<\/span>tag,<\/span>
          \n dataset<\/span>:<\/span> {<\/span> sid<\/span>:<\/span> node.<\/span>_sid }<\/span>,<\/span> \/\/ \u2190 \u6e32\u67d3\u5c42\u6a21\u677f\u4e0a\u4f1a\u5e26\u8fd9\u4e2a\u503c<\/span>
          \n children<\/span>:<\/span> node.<\/span>children.<\/span>map<\/span>(<\/span>serialize)<\/span>
          \n }<\/span>
          \n}<\/span><\/p>\n

          \u7b2c\u4e8c\u6b65：\u4e8b\u4ef6\u89e6\u53d1\u65f6，\u4ece dataset \u91cc\u7684 sid \u53cd\u67e5\u56de\u8282\u70b9\u3002 \u6e32\u67d3\u5c42\u7528\u6237\u70b9\u51fb \u2192 \u539f\u751f\u4e8b\u4ef6\u5bf9\u8c61\u7684 target.dataset.sid \u539f\u6837\u5e26\u56de\u903b\u8f91\u5c42 \u2192 \u4e8b\u4ef6\u4e2d\u5fc3\u62ff\u8fd9\u4e2a sid \u53bb\u8282\u70b9\u7f13\u5b58\u8868\u91cc\u67e5，\u5c31\u627e\u56de\u4e86\u865a\u62df\u6811\u4e0a\u7684\u771f\u5b9e\u8282\u70b9：<\/p>\n

          \/\/ \u7b80\u5316\u4f2a\u4ee3\u7801：\u4e8b\u4ef6\u89e6\u53d1\u65f6\u7684\u53cd\u67e5<\/span>
          \nfunction<\/span> handleNativeEvent<\/span>(<\/span>nativeEvent<\/span>)<\/span> {<\/span>
          \n const<\/span> sid =<\/span> nativeEvent.<\/span>target.<\/span>dataset.<\/span>sid
          \n const<\/span> targetNode =<\/span> nodeCache.<\/span>get<\/span>(<\/span>sid)<\/span> \/\/ \u2190 \u53cd\u67e5\u56de\u865a\u62df\u6811\u8282\u70b9<\/span>
          \n if<\/span> (<\/span>!<\/span>targetNode)<\/span> return<\/span> \/\/ \u8282\u70b9\u5df2\u5378\u8f7d\u5219\u4e22\u5f03<\/span>
          \n const<\/span> eventPath =<\/span> buildBubblePath<\/span>(<\/span>targetNode)<\/span> \/\/ \u6cbf\u7236\u94fe\u5411\u4e0a\u6784\u9020\u8def\u5f84<\/span>
          \n dispatchSyntheticEvent<\/span>(<\/span>nativeEvent,<\/span> eventPath)<\/span>
          \n}<\/span><\/p>\n

          \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

          \u6574\u6761\u94fe\u8def\u4e32\u8d77\u6765：<\/p>\n

          \u6e32\u67d3\u5c42 \u903b\u8f91\u5c42
          \n\u2500\u2500\u2500\u2500\u2500\u2500 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500
          \n\u7528\u6237\u70b9\u51fb\u6a21\u677f\u8282\u70b9
          \n dataset.sid = a-3f-12
          \n \u2502 \u539f\u751f\u4e8b\u4ef6（JSON）
          \n \u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u25ba \u4e8b\u4ef6\u4e2d\u5fc3
          \n 1. \u53d6 target.dataset.sid
          \n 2. nodeCache \u53cd\u67e5 \u2192 \u865a\u62df\u8282\u70b9
          \n 3. \u6cbf\u7236\u94fe\u6784\u9020\u5192\u6ce1\u8def\u5f84
          \n 4. \u6784\u9020\u5408\u6210\u4e8b\u4ef6\u5bf9\u8c61
          \n 5. \u6355\u83b7\u2192\u5192\u6ce1\u5faa\u73af\u5206\u53d1
          \n \u2502
          \n \u25bc
          \n \u6846\u67b6\u5c42\u56de\u8c03（React\/Vue）<\/p>\n

          3.2 \u914d\u5408\u4e8b\u4ef6\u540d\u4e0e\u8282\u70b9\u7f13\u5b58，\u624d\u662f\u4e00\u6761\u5b8c\u6574\u94fe\u8def<\/h4>\n

          \u5355\u70b9\u770b，sid \u53ea\u89e3\u51b3\u300c\u627e\u5230\u8d77\u70b9\u300d\u3002\u6e90\u7801\u91cc\u628a\u5b83\u548c\u53e6\u5916\u4e24\u4ef6\u4e8b\u914d\u5408，\u624d\u62fc\u51fa\u5b8c\u6574\u7684\u4e8b\u4ef6\u94fe\u8def：<\/p>\n

          （1）\u4e8b\u4ef6\u540d\u53c2\u4e0e\u5339\u914d\u3002 \u8282\u70b9\u4e0a\u767b\u8bb0\u7684\u56de\u8c03\u6309\u4e8b\u4ef6\u7c7b\u578b\u5206\u7ec4\u2014\u2014tap \u7684\u56de\u8c03\u4e0d\u4f1a\u56e0\u4e3a touchmove \u89e6\u53d1\u3002\u5206\u53d1\u65f6，\u4e8b\u4ef6\u4e2d\u5fc3\u7528\u300csid + \u4e8b\u4ef6\u540d\u300d\u5171\u540c\u5b9a\u4f4d\u8981\u6267\u884c\u7684\u56de\u8c03\u96c6\u5408，\u907f\u514d\u4e00\u4e2a\u8282\u70b9\u7ed1\u4e86\u5341\u79cd\u4e8b\u4ef6\u65f6\u7684\u904d\u5386\u5f00\u9500\u3002<\/p>\n

          （2）\u8282\u70b9\u7f13\u5b58\u7684\u751f\u547d\u5468\u671f\u7ba1\u7406\u3002 nodeCache \u662f\u4e00\u5f20\u968f\u865a\u62df\u6811\u589e\u5220\u540c\u6b65\u7ef4\u62a4\u7684\u8868：\u8282\u70b9\u63d2\u5165\u6811\u5e76\u9996\u6b21\u7ed1\u5b9a\u65f6\u767b\u8bb0，\u5378\u8f7d\u65f6\u6ce8\u9500\u3002\u8fd9\u89e3\u91ca\u4e86\u4e00\u4e2a\u8fb9\u754c\u884c\u4e3a\u2014\u2014\u5982\u679c\u4e8b\u4ef6\u5728\u98de\u884c\u4e2d（\u6e32\u67d3\u5c42\u5df2\u53d1\u51fa\u3001\u903b\u8f91\u5c42\u8fd8\u6ca1\u5904\u7406）\u8282\u70b9\u5c31\u88ab\u5378\u8f7d，\u53cd\u67e5\u4f1a\u843d\u7a7a，\u4e8b\u4ef6\u88ab\u9759\u9ed8\u4e22\u5f03\u3002\u8fd9\u4e0d\u662f bug，\u800c\u662f\u300c\u6a21\u62df\u5c42\u300d\u4e0e\u771f\u5b9e DOM \u7684\u56fa\u6709\u5dee\u5f02：\u6d4f\u89c8\u5668\u7684\u4e8b\u4ef6\u4f20\u64ad\u662f\u5185\u6838\u540c\u6b65\u5b8c\u6210\u7684，\u800c\u8fd9\u91cc\u7684\u4f20\u64ad\u9694\u4e86\u4e00\u6b21\u7ebf\u7a0b\u901a\u4fe1，\u5feb\u7167\u53ef\u80fd\u8fc7\u671f\u3002 \u5904\u7406\u300c\u5feb\u901f\u70b9\u51fb\u5bfc\u81f4\u5217\u8868\u9879\u7acb\u5373\u5220\u9664\u300d\u8fd9\u7c7b\u573a\u666f\u65f6，\u8fd9\u4e2a\u7ec6\u8282\u503c\u5f97\u8bb0\u5728\u5fc3\u91cc\u3002<\/p>\n

          （3）\u5192\u6ce1\u8def\u5f84\u7684\u6784\u9020\u662f\u7eaf\u903b\u8f91\u5c42\u7684\u3002 \u53cd\u67e5\u62ff\u5230 target \u8282\u70b9\u540e，\u6cbf node.parent \u9010\u7ea7\u5411\u4e0a\u8d70\u5230\u9875\u9762\u6839，\u5c31\u5f97\u5230\u4e00\u6761\u5b8c\u6574\u7684\u8def\u5f84\u6570\u7ec4\u3002\u6ce8\u610f：\u8fd9\u6761\u8def\u5f84\u662f\u865a\u62df\u6811\u7684\u8def\u5f84，\u4e0d\u662f\u6e32\u67d3\u5c42\u6a21\u677f\u7684\u8def\u5f84\u3002 \u6e32\u67d3\u5c42\u53ea\u77e5\u9053\u88ab\u70b9\u51fb\u7684\u90a3\u4e2a\u8282\u70b9；\u300c\u54ea\u4e9b\u7956\u5148\u8282\u70b9\u7ed1\u4e86\u540c\u7c7b\u578b\u4e8b\u4ef6\u3001\u6309\u4ec0\u4e48\u987a\u5e8f\u6267\u884c\u300d，\u5168\u90e8\u7531\u903b\u8f91\u5c42\u6839\u636e\u865a\u62df\u6811\u81ea\u5df1\u63a8\u5bfc\u3002\u4e5f\u5c31\u662f\u8bf4，DOM \u7684\u4f20\u64ad\u8bed\u4e49\u5728\u6846\u67b6\u91cc\u88ab\u5f7b\u5e95\u300c\u91cd\u5efa\u300d\u4e86\u4e00\u904d\u2014\u2014\u6e32\u67d3\u5c42\u53ea\u8d1f\u8d23\u62a5\u544a\u300c\u70b9\u4e86\u8c01\u300d\u3002<\/p>\n

          3.3 dataset \u8bed\u4e49\u7684\u987a\u5e26\u4fee\u590d<\/h4>\n

          \u8fd8\u6709\u4e00\u4e2a\u5bb9\u6613\u88ab\u5ffd\u89c6\u7684\u6536\u76ca\u3002\u539f\u751f\u5c0f\u7a0b\u5e8f\u7684 dataset \u6709\u4e0d\u5c11\u89c4\u77e9：\u5c5e\u6027\u540d\u5168\u5c0f\u5199\u3001\u8fde\u5b57\u7b26\u8f6c\u9a7c\u5cf0\u3001\u503c\u5fc5\u987b\u662f\u53ef\u5e8f\u5217\u5316\u6570\u636e\u3002\u5f00\u53d1\u8005\u4ece React \u4e16\u754c\u5e26\u6765\u7684 e.target.dataset \u4f7f\u7528\u4e60\u60ef（\u5f80\u8282\u70b9\u4e0a\u6302\u81ea\u5b9a\u4e49\u6570\u636e\u3001\u5728\u59d4\u6258\u56de\u8c03\u91cc\u8bfb\u53d6）\u5728\u539f\u751f\u91cc\u7ecf\u5e38\u8e29\u5751\u3002\u800c\u6846\u67b6 A \u7684\u65b9\u6848\u91cc，e.target \u5df2\u7ecf\u88ab resolve \u6210\u865a\u62df\u6811\u8282\u70b9，dataset \u7684\u53d6\u503c\u8d70\u7684\u662f\u865a\u62df\u8282\u70b9\u4e0a\u7684\u5c5e\u6027\u2014\u2014DOM \u7684 dataset \u5fc3\u667a\u88ab\u987a\u5e26\u4fdd\u7559\u4e86\u4e0b\u6765，\u800c\u4e0d\u662f\u8ba9 React \u5f00\u53d1\u8005\u53bb\u9002\u5e94\u5c0f\u7a0b\u5e8f\u7684 dataset \u602a\u7656\u3002\u8fd9\u4e5f\u662f\u300c\u6a21\u62df\u5c42\u300d\u7684\u4ef7\u503c\u6e05\u5355\u91cc\u5e38\u88ab\u6f0f\u6389\u7684\u4e00\u9879\u3002<\/p>\n

          3.4 \u9762\u8bd5\u8bdd\u672f\u5c0f\u7ed3<\/h4>\n

          \u4e00\u53e5\u8bdd\u7248：
          \n\u201c\u6e32\u67d3\u5c42\u548c\u903b\u8f91\u5c42\u4e4b\u95f4\u53ea\u80fd\u4f20\u53ef\u5e8f\u5217\u5316\u6570\u636e，\u4f20\u4e0d\u4e86\u8282\u70b9\u3002\u6846\u67b6\u5728\u7ed1\u5b9a\u65f6\u7ed9\u8282\u70b9\u751f\u6210 sid \u5e76\u5199\u8fdb\u6e32\u67d3\u6570\u636e\u7684 dataset，\u4e8b\u4ef6\u89e6\u53d1\u65f6\u4ece\u539f\u751f\u4e8b\u4ef6\u7684 target.dataset.sid \u53cd\u67e5\u8282\u70b9\u7f13\u5b58\u8868\u627e\u56de\u865a\u62df\u8282\u70b9，\u518d\u6cbf\u7236\u94fe\u6784\u9020\u5192\u6ce1\u8def\u5f84，\u914d\u5408\u4e8b\u4ef6\u540d\u5206\u7ec4\u5339\u914d\u5b8c\u6210\u6574\u4e2a\u4e8b\u4ef6\u94fe\u8def\u3002\u201d<\/p>\n

          \u6df1\u5165\u7248：
          \n\u201csid \u53cd\u67e5\u7684\u5173\u952e\u7ea6\u675f\u662f\u53cc\u7ebf\u7a0b\u53ea\u4f20 JSON：\u7ed1\u5b9a\u53d1\u751f\u65f6\u8282\u70b9\u7f13\u5b58\u8868\u767b\u8bb0 sid \u5230\u865a\u62df\u8282\u70b9\u7684\u6620\u5c04\u5e76\u968f\u5e8f\u5217\u5316\u4e0b\u53d1 dataset；\u89e6\u53d1\u65f6\u7528 sid \u52a0\u4e8b\u4ef6\u540d\u5171\u540c\u5b9a\u4f4d\u56de\u8c03\u96c6\u5408\u3002\u5192\u6ce1\u8def\u5f84\u5728\u903b\u8f91\u5c42\u6cbf\u865a\u62df\u6811\u7236\u94fe\u63a8\u5bfc，\u6e32\u67d3\u5c42\u53ea\u62a5\u544a\u70b9\u51fb\u76ee\u6807\u3001\u4e0d\u53c2\u4e0e\u4f20\u64ad，DOM \u4f20\u64ad\u8bed\u4e49\u88ab\u5b8c\u5168\u91cd\u5efa\u3002\u8fb9\u754c\u662f\u4e8b\u4ef6\u98de\u884c\u4e2d\u8282\u70b9\u5378\u8f7d\u4f1a\u5bfc\u81f4\u53cd\u67e5\u843d\u7a7a\u88ab\u9759\u9ed8\u4e22\u5f03\u2014\u2014\u6d4f\u89c8\u5668\u5185\u6838\u540c\u6b65\u4f20\u64ad\u6ca1\u6709\u8fd9\u4e2a\u95ee\u9898，\u6a21\u62df\u5c42\u9694\u4e00\u6b21\u7ebf\u7a0b\u901a\u4fe1，\u5feb\u7167\u53ef\u80fd\u8fc7\u671f\u3002\u53e6\u4e00\u4e2a\u6536\u76ca\u662f target \u88ab resolve \u6210\u865a\u62df\u8282\u70b9\u540e，dataset \u5fc3\u667a\u4e5f\u56de\u5230\u4e86 DOM \u4e60\u60ef\u3002\u201d<\/p>\n

          \n

          \u56db\u3001\u91cd\u5efa\u6355\u83b7-\u5192\u6ce1-\u59d4\u6258：\u628a DOM \u7684\u4f20\u64ad\u8bed\u4e49\u62fc\u5b8c\u6574<\/h3>\n

          4.1 \u5b8c\u6574\u7684\u4f20\u64ad\u5faa\u73af<\/h4>\n

          \u524d\u4e09\u8282\u7684\u96f6\u4ef6\u51d1\u9f50\u4e86：\u4e8b\u4ef6\u4e2d\u5fc3\u63a5\u4f4f\u539f\u751f\u4e8b\u4ef6\u3001sid \u53cd\u67e5\u627e\u56de target\u3001\u5192\u6ce1\u8def\u5f84\u6cbf\u7236\u94fe\u6784\u9020\u3001\u5408\u6210\u4e8b\u4ef6\u5bf9\u8c61\u63d0\u4f9b target\/currentTarget \u4e0e stopPropagation\u3002\u73b0\u5728\u628a\u5b83\u4eec\u7ec4\u88c5\u6210\u4e00\u4e2a\u5b8c\u6574\u7684\u4f20\u64ad\u5faa\u73af：<\/p>\n

          \/\/ \u7b80\u5316\u4f2a\u4ee3\u7801：\u5b8c\u6574\u7684\u4e8b\u4ef6\u4f20\u64ad\u6a21\u62df<\/span>
          \nfunction<\/span> dispatchSyntheticEvent<\/span>(<\/span>nativeEvent,<\/span> eventPath<\/span>)<\/span> {<\/span>
          \n const<\/span> event =<\/span> new<\/span> SyntheticEvent<\/span>(<\/span>nativeEvent,<\/span> eventPath)<\/span><\/p>\n

          \/\/ \u2460 \u6355\u83b7\u9636\u6bb5：\u4ece\u6839\u5411\u4e0b<\/span>
          \n for<\/span> (<\/span>let<\/span> i =<\/span> eventPath.<\/span>length –<\/span> 1<\/span>;<\/span> i >=<\/span> 1<\/span>;<\/span> i—<\/span>)<\/span> {<\/span>
          \n invokeHandlers<\/span>(<\/span>eventPath[<\/span>i]<\/span>,<\/span> nativeEvent.<\/span>type,<\/span> event,<\/span> 'capture'<\/span>)<\/span>
          \n }<\/span><\/p>\n

          \/\/ \u2461 \u76ee\u6807\u9636\u6bb5<\/span>
          \n invokeHandlers<\/span>(<\/span>eventPath[<\/span>0<\/span>]<\/span>,<\/span> nativeEvent.<\/span>type,<\/span> event,<\/span> 'target'<\/span>)<\/span><\/p>\n

          \/\/ \u2462 \u5192\u6ce1\u9636\u6bb5：\u4ece\u76ee\u6807\u5411\u4e0a<\/span>
          \n for<\/span> (<\/span>let<\/span> i =<\/span> 1<\/span>;<\/span> i <<\/span> eventPath.<\/span>length;<\/span> i++<\/span>)<\/span> {<\/span>
          \n if<\/span> (<\/span>event.<\/span>_stopped)<\/span> break<\/span>
          \n event.<\/span>_currentIndex =<\/span> i \/\/ currentTarget \u6307\u9488<\/span>
          \n invokeHandlers<\/span>(<\/span>eventPath[<\/span>i]<\/span>,<\/span> nativeEvent.<\/span>type,<\/span> event,<\/span> 'bubble'<\/span>)<\/span>
          \n }<\/span>
          \n}<\/span><\/p>\n

          \u4e09\u4e2a\u9636\u6bb5\u5408\u8d77\u6765，DOM \u7684\u5b8c\u6574\u4f20\u64ad\u6a21\u578b\u5c31\u590d\u523b\u4e86\u3002\u6ce8\u610f\u8fd9\u4e00\u5207\u7684\u843d\u70b9：React \u5f00\u53d1\u8005\u65e5\u5e38\u5199\u7684\u4e1c\u897f\u2014\u2014e.target.dataset\u3001e.currentTarget\u3001\u5b50\u5143\u7d20\u56de\u8c03\u91cc e.stopPropagation()\u3001\u628a\u70b9\u51fb\u56de\u8c03\u7ed1\u5728\u7236\u5bb9\u5668\u4e0a\u505a\u4e8b\u4ef6\u59d4\u6258\u2014\u2014\u5168\u90e8\u9010\u9879\u53ef\u7528\u3002 \u59d4\u6258\u5c24\u5176\u503c\u5f97\u70b9\u7834：\u56e0\u4e3a\u56de\u8c03\u662f\u7ed1\u5728\u865a\u62df\u6811\u7684\u7236\u8282\u70b9\u4e0a\u7684，sid \u53cd\u67e5\u627e\u56de\u7684\u662f\u6700\u6df1\u7684\u5b50\u8282\u70b9，\u5192\u6ce1\u81ea\u7136\u4f1a\u8def\u8fc7\u7236\u8282\u70b9\u5e76\u6267\u884c\u5176\u56de\u8c03\u2014\u2014\u300c\u7236\u8282\u70b9\u6536\u5b50\u4e8b\u4ef6\u300d\u7684\u59d4\u6258\u6a21\u5f0f\u4e0d\u9700\u8981\u4efb\u4f55\u989d\u5916\u673a\u5236，\u662f\u5192\u6ce1\u6a21\u62df\u7684\u514d\u8d39\u8d60\u54c1\u3002<\/p>\n

          4.2 \u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u600e\u4e48\u62ff\u5230\u9875\u9762\u4e0a\u4e0b\u6587：Current \u5355\u4f8b<\/h4>\n

          \u8fd8\u6709\u4e00\u4e2a\u914d\u5957\u8bbe\u8ba1\u5bb9\u6613\u88ab\u6f0f\u6389：\u4e1a\u52a1\u56de\u8c03\u91cc\u7ecf\u5e38\u8981\u7528\u5f53\u524d\u9875\u9762\u7684\u8def\u7531\u53c2\u6570\u3001\u5168\u5c40\u72b6\u6001\u3002React\/Vue \u7684\u56de\u8c03\u51fd\u6570\u8131\u79bb\u4e86\u7ec4\u4ef6\u95ed\u5305\u540e，\u6846\u67b6\u600e\u4e48\u7ed9\u5b83\u63d0\u4f9b\u300c\u6211\u662f\u54ea\u4e2a\u9875\u9762\u300d\u7684\u4e0a\u4e0b\u6587？<\/p>\n

          \u6846\u67b6 A \u7684\u7b54\u6848\u662f\u4e00\u4e2a\u6781\u7b80\u7684\u5168\u5c40\u5355\u4f8b：<\/p>\n

          \/\/ \u7b80\u5316\u4f2a\u4ee3\u7801：\u5168\u5c40\u4e0a\u4e0b\u6587\u5355\u4f8b<\/span>
          \nconst<\/span> Current =<\/span> {<\/span>
          \n app<\/span>:<\/span> null<\/span>,<\/span> \/\/ \u5f53\u524d\u5e94\u7528\u5b9e\u4f8b<\/span>
          \n router<\/span>:<\/span> null<\/span>,<\/span> \/\/ \u5f53\u524d\u8def\u7531\u5668<\/span>
          \n page<\/span>:<\/span> null<\/span> \/\/ \u5f53\u524d\u9875\u9762（\u865a\u62df\u6811\u7684\u6839\u8282\u70b9）<\/span>
          \n}<\/span><\/p>\n

          \/\/ \u9875\u9762 onLoad \u65f6\u5207\u6362\u4e0a\u4e0b\u6587<\/span>
          \nfunction<\/span> onPageLoad<\/span>(<\/span>page<\/span>)<\/span> {<\/span>
          \n Current.<\/span>page =<\/span> page
          \n}<\/span><\/p>\n

          \/\/ \u5bf9\u5916 API：\u56de\u8c03\u91cc\u53d6\u5f53\u524d\u5b9e\u4f8b<\/span>
          \nfunction<\/span> getCurrentInstance<\/span>(<\/span>)<\/span> {<\/span>
          \n return<\/span> {<\/span> app<\/span>:<\/span> Current.<\/span>app,<\/span> page<\/span>:<\/span> Current.<\/span>page,<\/span> router<\/span>:<\/span> Current.<\/span>router }<\/span>
          \n}<\/span><\/p>\n

          \u4e8b\u4ef6\u4e2d\u5fc3\u5206\u53d1\u56de\u8c03\u524d，Current.page \u5df2\u7ecf\u6307\u5411\u5f53\u524d\u6d3b\u8dc3\u9875\u9762\u2014\u2014\u4e8e\u662f\u4efb\u4f55\u4e00\u4e2a\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u91cc\u8c03 getCurrentInstance()，\u90fd\u80fd\u62ff\u5230\u6b63\u786e\u4e0a\u4e0b\u6587\u3002\u8bbe\u8ba1\u53ea\u6709\u4e8c\u5341\u51e0\u884c，\u4f46\u5b83\u7684\u6b63\u786e\u6027\u4f9d\u8d56\u4e00\u4e2a\u65f6\u5e8f\u524d\u63d0：\u540c\u4e00\u65f6\u523b\u53ea\u6709\u4e00\u4e2a\u9875\u9762\u5728\u5904\u7406\u4e8b\u4ef6\u3002 \u5c0f\u7a0b\u5e8f\u7684\u9875\u9762\u6808\u6a21\u578b\u57fa\u672c\u6ee1\u8db3\u8fd9\u4e2a\u524d\u63d0（\u540e\u53f0\u9875\u9762\u7684\u56de\u8c03\u4e0d\u4f1a\u88ab\u89e6\u53d1），\u4f46\u5982\u679c\u4f60\u5728\u81ea\u5b9a\u4e49\u5bb9\u5668\u6216\u9884\u6e32\u67d3\u573a\u666f\u91cc\u6253\u7834\u5b83，\u5c31\u8981\u5c0f\u5fc3\u4e86\u2014\u2014\u8fd9\u4e5f\u662f\u8bfb\u6e90\u7801\u65f6\u624d\u80fd\u610f\u8bc6\u5230\u7684\u9690\u542b\u5951\u7ea6\u3002<\/p>\n

          4.3 \u4e24\u6761\u8def\u7ebf\u6700\u950b\u5229\u7684\u5bf9\u7167<\/h4>\n

          \u81f3\u6b64，\u53ef\u4ee5\u653e\u4e0a\u672c\u7cfb\u5217\u6700\u503c\u5f97\u53cd\u590d\u54c1\u5473\u7684\u4e00\u7ec4\u5bf9\u7167\u3002\u540c\u4e00\u4e2a\u95ee\u9898：\u4ea4\u4e92\u7684\u6027\u80fd\u3002<\/p>\n\n\u8de8\u7aef\u6846\u67b6 A\u539f\u751f\u7ec4\u4ef6\u5e93 B<\/tr>\n\n\n\n\n\n\n
          \u95ee\u9898<\/td>\n\u903b\u8f91\u5c42\u6ca1\u6709 DOM \u4e8b\u4ef6，\u8bed\u4e49\u8981\u91cd\u5efa<\/td>\n\u9ad8\u9891\u624b\u52bf\u8d70\u53cc\u7ebf\u7a0b\u901a\u4fe1，\u5ef6\u8fdf\u53d7\u4e0d\u4e86<\/td>\n<\/tr>\n
          \u8def\u7ebf<\/td>\n\u5728\u903b\u8f91\u5c42\u91cd\u5efa\u5b8c\u6574\u4e8b\u4ef6\u6a21\u578b<\/td>\n\u628a\u903b\u8f91\u63a8\u5230\u6e32\u67d3\u7ebf\u7a0b<\/td>\n<\/tr>\n
          \u624b\u6bb5<\/td>\n\u4e8b\u4ef6\u4e2d\u5fc3 + sid \u53cd\u67e5 + \u6a21\u62df\u6355\u83b7\/\u5192\u6ce1<\/td>\n\u624b\u52bf\u903b\u8f91\u5199\u8fdb\u89c6\u56fe\u5c42\u811a\u672c，\u5728\u6e32\u67d3\u7ebf\u7a0b\u6267\u884c<\/td>\n<\/tr>\n
          \u56de\u4f20<\/td>\n\u4e0d\u6d89\u53ca（\u5168\u7a0b\u903b\u8f91\u5c42\u5185\u5b8c\u6210）<\/td>\n\u6865\u63a5\u65b9\u6cd5\u628a\u7ed3\u679c\u4f20\u56de\u903b\u8f91\u5c42，\u518d\u89e6\u53d1\u81ea\u5b9a\u4e49\u4e8b\u4ef6<\/td>\n<\/tr>\n
          \u4ed8\u7684\u4ee3\u4ef7<\/td>\n\u53cd\u67e5\/\u8def\u5f84\u6784\u9020\/\u5bf9\u8c61\u5305\u88c5\u7684\u6027\u80fd\u7a0e<\/td>\n\u5e73\u53f0\u65b9\u8a00\u7ed1\u5b9a + \u53cc\u4efd\u903b\u8f91\u7ef4\u62a4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          \u539f\u751f\u7ec4\u4ef6\u5e93 B \u5904\u7406\u9ad8\u9891\u624b\u52bf（\u4f8b\u5982\u5de6\u6ed1\u51fa\u73b0\u64cd\u4f5c\u6309\u94ae\u7684\u6ed1\u52a8\u83dc\u5355）\u7684\u601d\u8def\u5b8c\u5168\u76f8\u53cd：\u624b\u52bf\u903b\u8f91\u76f4\u63a5\u5199\u5728\u89c6\u56fe\u5c42\u811a\u672c\u91cc，\u8dd1\u5728\u6e32\u67d3\u7ebf\u7a0b，\u89e6\u6478\u7684\u6bcf\u4e00\u5e27\u90fd\u5728\u6e32\u67d3\u7ebf\u7a0b\u5c31\u5730\u54cd\u5e94，\u4e0d\u8de8\u7ebf\u7a0b；\u6ed1\u52a8\u7ed3\u675f\u624d\u901a\u8fc7\u6865\u63a5\u65b9\u6cd5\u628a\u7ed3\u679c（\u201c\u7528\u6237\u9009\u4e86\u5220\u9664\u201d）\u4f20\u56de\u903b\u8f91\u5c42，\u89e6\u53d1\u81ea\u5b9a\u4e49\u4e8b\u4ef6\u3002\u6846\u67b6 A \u662f\u628a DOM \u8bed\u4e49\u642c\u8fdb\u903b\u8f91\u5c42，\u7ec4\u4ef6\u5e93 B \u662f\u628a\u4ea4\u4e92\u903b\u8f91\u642c\u51fa\u903b\u8f91\u5c42\u2014\u2014\u65b9\u5411\u6070\u597d\u76f8\u53cd，\u4f46\u90fd\u7cbe\u51c6\u6253\u5728\u5404\u81ea\u8981\u5bb3\u4e0a：\u6846\u67b6 A \u8981\u7684\u662f React\/Vue \u5fc3\u667a\u517c\u5bb9，\u7ec4\u4ef6\u5e93 B \u8981\u7684\u662f\u89e6\u6478\u8ddf\u968f\u96f6\u5ef6\u8fdf\u3002<\/p>\n

          4.4 \u9762\u8bd5\u8bdd\u672f\u5c0f\u7ed3<\/h4>\n

          \u4e00\u53e5\u8bdd\u7248：
          \n\u201c\u6846\u67b6\u7528\u6355\u83b7-\u76ee\u6807-\u5192\u6ce1\u4e09\u6bb5\u5faa\u73af\u52a0 currentTarget \u6307\u9488\u91cd\u5efa\u5b8c\u6574 DOM \u4f20\u64ad\u8bed\u4e49，\u4e8b\u4ef6\u59d4\u6258\u662f\u5192\u6ce1\u6a21\u62df\u7684\u514d\u8d39\u8d60\u54c1；\u914d\u5957\u4e00\u4e2a\u5168\u5c40\u5355\u4f8b Current \u6301\u6709\u5f53\u524d app\/router\/page，\u8ba9\u4efb\u4f55\u4e8b\u4ef6\u56de\u8c03\u90fd\u80fd\u901a\u8fc7 getCurrentInstance \u62ff\u5230\u9875\u9762\u4e0a\u4e0b\u6587\u3002\u539f\u751f\u8def\u7ebf\u5219\u628a\u624b\u52bf\u903b\u8f91\u5199\u8fdb\u89c6\u56fe\u5c42\u811a\u672c\u8dd1\u5728\u6e32\u67d3\u7ebf\u7a0b，\u7528\u6865\u63a5\u65b9\u6cd5\u56de\u4f20\u7ed3\u679c\u2014\u2014\u540c\u4e00\u4e2a\u4ea4\u4e92\u6027\u80fd\u95ee\u9898，\u4e00\u4e2a\u5411\u903b\u8f91\u5c42\u642c\u8bed\u4e49，\u4e00\u4e2a\u5411\u6e32\u67d3\u7ebf\u7a0b\u642c\u903b\u8f91\u3002\u201d<\/p>\n

          \u6df1\u5165\u7248：
          \n\u201c\u4e09\u6bb5\u5faa\u73af\u91cc currentTarget \u7684 getter \u8bfb\u6267\u884c\u6307\u9488，stopPropagation \u662f\u6807\u5fd7\u4f4d\u8ba9\u5192\u6ce1\u63d0\u524d break；\u59d4\u6258\u6a21\u5f0f\u4e0d\u9700\u8981\u989d\u5916\u673a\u5236，\u56e0\u4e3a\u56de\u8c03\u7ed1\u5728\u865a\u62df\u6811\u7236\u8282\u70b9\u4e0a\u3001\u5192\u6ce1\u81ea\u7136\u8def\u8fc7\u3002Current \u5355\u4f8b\u4e8c\u5341\u51e0\u884c，\u6b63\u786e\u6027\u4f9d\u8d56\u2019\u540c\u4e00\u65f6\u523b\u53ea\u6709\u4e00\u4e2a\u9875\u9762\u5728\u5904\u7406\u4e8b\u4ef6\u2019\u7684\u65f6\u5e8f\u5951\u7ea6\u3002\u4e24\u6761\u8def\u7ebf\u5bf9\u7167\u7684\u672c\u8d28\u662f\u76ee\u6807\u4e0d\u540c：\u6846\u67b6\u4e70\u7684\u662f React \u5f00\u53d1\u8005\u7684\u96f6\u6210\u672c\u8fc1\u79fb，\u4ee3\u4ef7\u662f\u6bcf\u4e2a\u4e8b\u4ef6\u90fd\u8981\u53cd\u67e5\u6784\u9020\u8def\u5f84\u5305\u88c5\u5bf9\u8c61\u7684\u6027\u80fd\u7a0e；\u539f\u751f\u7ec4\u4ef6\u5e93\u4e70\u7684\u662f\u89e6\u6478\u8ddf\u968f\u7684\u96f6\u5ef6\u8fdf，\u4ee3\u4ef7\u662f\u5e73\u53f0\u65b9\u8a00\u7ed1\u5b9a\u548c\u903b\u8f91\u53cc\u4efd\u7ef4\u62a4\u3002\u9009\u578b\u65f6\u5148\u95ee\u4f60\u8981\u4e70\u7684\u662f\u4ec0\u4e48\u3002\u201d<\/p>\n

          \n

          \u6536\u5c3e：\u6a21\u62df\u5c42\u7684\u8d26\u5355<\/h3>\n

          \u628a\u8fd9\u7bc7\u6587\u7ae0\u6536\u655b\u6210\u4e00\u5f20\u8d26\u5355\u3002<\/p>\n

          \u8bed\u4e49\u6536\u76ca（\u4e70\u5230\u7684）： e.target.dataset \/ e.currentTarget \/ e.stopPropagation() \/ \u4e8b\u4ef6\u59d4\u6258 \/ DOM \u5f0f dataset \u5fc3\u667a\u2014\u2014React \u5f00\u53d1\u8005\u7684\u6574\u5757\u808c\u8089\u8bb0\u5fc6\u5e73\u79fb\u8fc7\u6765，\u96f6\u91cd\u5b66\u6210\u672c\u3002\u8fd9\u4e9b\u8bed\u4e49\u6ca1\u6709\u4efb\u4f55\u4e00\u4e2a\u662f\u5e73\u53f0\u63d0\u4f9b\u7684，\u5168\u90e8\u662f\u6a21\u62df\u5c42\u7684\u4ea7\u51fa\u3002<\/p>\n

          \u6027\u80fd\u7a0e（\u4ed8\u51fa\u7684）： \u6bcf\u6b21\u4e8b\u4ef6\u90fd\u8981\u7ecf\u5386\u300c\u4e8b\u4ef6\u4e2d\u5fc3\u63a5\u4f4f \u2192 sid \u53cd\u67e5 \u2192 \u8def\u5f84\u6784\u9020 \u2192 \u5408\u6210\u5bf9\u8c61\u5305\u88c5 \u2192 \u4e09\u6bb5\u5faa\u73af\u300d\u3002\u6846\u67b6\u7528\u4e24\u4e2a\u8bbe\u8ba1\u628a\u7a0e\u538b\u5230\u6700\u4f4e：target\/currentTarget \u7684 getter \u60f0\u6027\u6c42\u503c（\u4e0d\u8bfb\u4e0d\u53cd\u67e5），\u4ee5\u53ca sid \u52a0\u4e8b\u4ef6\u540d\u5b9a\u4f4d\u56de\u8c03\u96c6\u5408（\u4e0d\u904d\u5386）\u3002\u4f46\u6a21\u62df\u5c42\u6539\u53d8\u4e0d\u4e86\u4e00\u4e2a\u4e8b\u5b9e：\u4e8b\u4ef6\u4ece\u7269\u7406\u70b9\u51fb\u5230\u56de\u8c03\u6267\u884c，\u6c38\u8fdc\u6bd4\u539f\u751f\u8def\u7ebf\u591a\u8d70\u4e00\u5c42\u5305\u88c5，\u4e14\u5192\u6ce1\u4f20\u64ad\u9694\u7740\u4e00\u6b21\u7ebf\u7a0b\u901a\u4fe1，\u5feb\u7167\u53ef\u80fd\u8fc7\u671f\u3002<\/p>\n

          \u8fd9\u7ec4\u6743\u8861\u662f\u53ef\u4ee5\u76f4\u63a5\u8fc1\u79fb\u5230\u4f60\u81ea\u5df1\u7684\u6280\u672f\u51b3\u7b56\u91cc\u7684：\u5f53\u4f60\u9700\u8981\u5728\u7f3a\u5931\u67d0\u79cd\u5e95\u5c42\u80fd\u529b\u7684\u73af\u5883\u91cc\u517c\u5bb9\u4e0a\u5c42\u5fc3\u667a\u65f6，\u95ee\u4e09\u4e2a\u95ee\u9898\u2014\u2014\u6a21\u62df\u70b9\u653e\u5728\u54ea\u4e00\u5c42（\u53ef\u66ff\u6362\u7684\u94a9\u5b50\u70b9 vs \u786c\u7f16\u7801）\u3001\u6a21\u62df\u6210\u672c\u80fd\u4e0d\u80fd\u60f0\u6027\u5316（\u4e0d\u8bbf\u95ee\u4e0d\u4ed8\u8d39）\u3001\u6a21\u62df\u8bed\u4e49\u7684\u8fb9\u754c\u5728\u54ea（\u5feb\u7167\u8fc7\u671f\u3001\u65f6\u5e8f\u5951\u7ea6）\u3002 \u8fd9\u4e09\u4e2a\u95ee\u9898\u5206\u522b\u5bf9\u5e94\u672c\u6587\u7684\u4e8b\u4ef6\u4e2d\u5fc3\u3001getter \u60f0\u6027\u6c42\u503c\u548c Current \u5355\u4f8b\u2014\u2014\u4e09\u4e2a\u7b54\u6848\u90fd\u5199\u5728\u6e90\u7801\u91cc，\u800c\u4e0d\u662f\u6587\u6863\u91cc\u3002<\/p>\n

          \u672c\u6587\u662f\u300c\u5c0f\u7a0b\u5e8f\u53cc\u8def\u7ebf\u6e90\u7801\u62c6\u89e3\u300d\u7cfb\u5217\u7684\u53c8\u4e00\u7bc7\u5355\u70b9\u6df1\u6316\u3002\u4e0b\u4e00\u7bc7\u6211\u4eec\u7ee7\u7eed\u5355\u62c6：\u589e\u91cf\u66f4\u65b0\u8c03\u5ea6\u5668\u2014\u2014\u8def\u5f84\u53bb\u91cd\u7684\u5177\u4f53\u7b97\u6cd5\u3001\u4e3a\u4ec0\u4e48\u7528 setTimeout \u800c\u4e0d\u662f\u5fae\u4efb\u52a1\u7684\u65f6\u5e8f\u8bc1\u660e\u3001\u5c40\u90e8\u66f4\u65b0\u5bb9\u5668\u7684\u67e5\u627e\u4e0e\u7f13\u5b58，\u5168\u90e8\u6e90\u7801\u7ea7\u5c55\u5f00\u3002\u611f\u5174\u8da3\u7684\u8bdd\u5173\u6ce8\u4e00\u4e0b，\u66f4\u65b0\u4f1a\u7b2c\u4e00\u65f6\u95f4\u63a8\u9001\u3002<\/p>\n

          \n

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