{"id":31503,"date":"2024-11-25T08:18:19","date_gmt":"2024-11-25T00:18:19","guid":{"rendered":"https:\/\/fwq.ai\/blog\/31503\/"},"modified":"2024-11-25T08:18:19","modified_gmt":"2024-11-25T00:18:19","slug":"%e6%80%8e%e6%a0%b7%e4%bd%bf%e7%94%a8react%e8%99%9a%e6%8b%9fdom","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/31503\/","title":{"rendered":"\u600e\u6837\u4f7f\u7528React\u865a\u62dfDOM"},"content":{"rendered":"

\u8fd9\u6b21\u7ed9\u5927\u5bb6\u5e26\u6765\u600e\u6837\u4f7f\u7528React\u865a\u62dfDOM\uff0c\u4f7f\u7528React\u865a\u62dfDOM\u7684\u6709\u54ea\u4e9b\uff0c\u4e0b\u9762\u5c31\u662f\u5b9e\u6218\u6848\u4f8b\uff0c\u4e00\u8d77\u6765\u770b\u4e00\u4e0b\u3002<\/p>\n

\u5728Web\u5f00\u53d1\u4e2d\uff0c\u9700\u8981\u5c06\u6570\u636e\u7684\u53d8\u5316\u5b9e\u65f6\u53cd\u6620\u5230UI\u4e0a\uff0c\u8fd9\u65f6\u5c31\u9700\u8981\u5bf9DOM\u8fdb\u884c\u64cd\u4f5c\uff0c\u4f46\u662f\u590d\u6742\u6216\u9891\u7e41\u7684DOM\u64cd\u4f5c\u901a\u5e38\u662f\u6027\u80fd\u74f6\u9888\u4ea7\u751f\u7684\u539f\u56e0\uff0c\u4e3a\u6b64\uff0cReact\u5f15\u5165\u4e86\u865a\u62dfDOM\uff08Virtual DOM\uff09\u7684\u673a\u5236\u3002<\/p>\n

\u4e00\u3001\u4ec0\u4e48\u662f\u865a\u62dfDOM\uff1f<\/strong><\/span><\/p>\n

\u5728React\u4e2d\uff0crender\u6267\u884c\u7684\u7ed3\u679c\u5f97\u5230\u7684\u5e76\u4e0d\u662f\u771f\u6b63\u7684DOM\u8282\u70b9\uff0c\u7ed3\u679c\u4ec5\u4ec5\u662f\u8f7b\u91cf\u7ea7\u7684\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3avirtual DOM\u3002<\/p>\n

\u865a\u62dfDOM\u662fReact\u7684\u4e00\u5927\u4eae\u70b9\uff0c\u5177\u6709batching(\u6279\u5904\u7406)\u548c\u9ad8\u6548\u7684Diff\u7b97\u6cd5\u3002\u8fd9\u8ba9\u6211\u4eec\u53ef\u4ee5\u65e0\u9700\u62c5\u5fc3\u6027\u80fd\u95ee\u9898\u800c\u201d\u6beb\u65e0\u987e\u5fcc\u201d\u7684\u968f\u65f6\u201c\u5237\u65b0\u201d\u6574\u4e2a\u9875\u9762\uff0c\u7531\u865a\u62df DOM\u6765\u786e\u4fdd\u53ea\u5bf9\u754c\u9762\u4e0a\u771f\u6b63\u53d8\u5316\u7684\u90e8\u5206\u8fdb\u884c\u5b9e\u9645\u7684DOM\u64cd\u4f5c\u3002\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\u57fa\u672c\u65e0\u9700\u5173\u5fc3\u865a\u62dfDOM\u662f\u5982\u4f55\u8fd0\u4f5c\u7684\uff0c\u4f46\u662f\u7406\u89e3\u5176\u8fd0\u884c\u673a\u5236\u4e0d\u4ec5\u6709\u52a9\u4e8e\u66f4\u597d\u7684\u7406\u89e3React\u7ec4\u4ef6\u7684\uff0c\u800c\u4e14\u5bf9\u4e8e\u8fdb\u4e00\u6b65\u4f18\u5316 React\u7a0b\u5e8f\u4e5f\u4f1a\u6709\u5f88\u5927\u5e2e\u52a9\u3002<\/p>\n

\u4e8c\u3001\u865a\u62dfDOM VS \u76f4\u63a5\u64cd\u4f5c\u539f\u751fDOM\uff1f<\/strong><\/span><\/p>\n

\u5982\u679c\u6ca1\u6709 Virtual DOM\uff0c\u7b80\u5355\u6765\u8bf4\u5c31\u662f\u76f4\u63a5\u91cd\u7f6e innerHTML\u3002\u8fd9\u6837\u64cd\u4f5c\uff0c\u5728\u4e00\u4e2a\u5927\u578b\u5217\u8868\u6240\u6709\u6570\u636e\u90fd\u53d8\u4e86\u7684\u60c5\u51b5\u4e0b\uff0c\u8fd8\u7b97\u662f\u5408\u7406\uff0c\u4f46\u662f\uff0c\u5f53\u53ea\u6709\u4e00\u884c\u6570\u636e\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u5b83\u4e5f\u9700\u8981\u91cd\u7f6e\u6574\u4e2a innerHTML\uff0c\u8fd9\u65f6\u5019\u663e\u7136\u5c31\u9020\u6210\u4e86\u5927\u91cf\u6d6a\u8d39\u3002<\/p>\n

\u6bd4\u8f83innerHTML \u548cVirtual DOM \u7684\u91cd\u7ed8\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n

innerHTML: render html string + \u91cd\u65b0\u521b\u5efa\u6240\u6709 DOM \u5143\u7d20<\/p>\n

Virtual DOM: render Virtual DOM + diff + \u5fc5\u8981\u7684 DOM \u66f4\u65b0<\/p>\n

\u548c DOM \u64cd\u4f5c\u6bd4\u8d77\u6765\uff0cjs \u8ba1\u7b97\u662f\u975e\u5e38\u4fbf\u5b9c\u7684\u3002Virtual DOM render + diff \u663e\u7136\u6bd4\u6e32\u67d3 html \u5b57\u7b26\u4e32\u8981\u6162\uff0c\u4f46\u662f\uff0c\u5b83\u4f9d\u7136\u662f\u7eaf js \u5c42\u9762\u7684\u8ba1\u7b97\uff0c\u6bd4\u8d77\u540e\u9762\u7684 DOM \u64cd\u4f5c\u6765\u8bf4\uff0c\u4f9d\u7136\u4fbf\u5b9c\u4e86\u592a\u591a\u3002\u5f53\u7136\uff0c\u66fe\u6709\u4eba\u505a\u8fc7\u9a8c\u8bc1\u8bf4React\u7684\u6027\u80fd\u4e0d\u5982\u76f4\u63a5\u64cd\u4f5c\u771f\u5b9eDOM\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

function Raw() {\r\n  var data = _buildData(),\r\n    html = \"\";\r\n  ...\r\n  for(var i=0; i<data.length; i++) {\r\n    var render = template;\r\n    render = render.replace(\"{{className}}\", \"\");\r\n    render = render.replace(\"{{label}}\", data[i].label);\r\n    html += render;\r\n  }\r\n  ...\r\n  container.innerHTML = html;\r\n  ...\r\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8be5\u6d4b\u8bd5\u7528\u4f8b\u4e2d\u867d\u7136\u6784\u9020\u4e86\u4e00\u4e2a\u5305\u542b1000\u4e2aTag\u7684String\uff0c\u5e76\u628a\u5b83\u6dfb\u52a0\u5230DOM\u6811\u4e2d\uff0c\u4f46\u662f\u53ea\u505a\u4e86\u4e00\u6b21DOM\u64cd\u4f5c\u3002\u7136\u800c\uff0c\u5728\u5b9e\u9645\u5f00\u53d1\u8fc7\u7a0b\u4e2d\uff0c\u8fd91000\u4e2a\u5143\u7d20\u66f4\u65b0\u53ef\u80fd\u5206\u5e03\u572820\u4e2a\u903b\u8f91\u5757\u4e2d\uff0c\u6bcf\u4e2a\u903b\u8f91\u5757\u4e2d\u5305\u542b50\u4e2a\u5143\u7d20\uff0c\u5f53\u9875\u9762\u9700\u8981\u66f4\u65b0\u65f6\uff0c\u90fd\u4f1a\u5f15\u8d77DOM\u6811\u7684\u66f4\u65b0\uff0c\u4e0a\u8ff0\u4ee3\u7801\u5c31\u8fd1\u4f3c\u53d8\u6210\u4e86\u5982\u4e0b\u683c\u5f0f\uff1a<\/p>\n
function Raw() {\r\n  var data = _buildData(), \r\n    html = \"\"; \r\n  ... \r\n  for(var i=0; i<data.length; i++) { \r\n    var render = template; \r\n    render = render.replace(\"{{className}}\", \"\"); \r\n    render = render.replace(\"{{label}}\", data[i].label); \r\n    html += render; \r\n    if(!(i % 50)) {\r\n      container.innerHTML = html;\r\n    }\r\n  } \r\n  ... \r\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8fd9\u6837\u6765\u770b\uff0cReact\u7684\u6027\u80fd\u5c31\u8fdc\u80dc\u4e8e\u539f\u751fDOM\u64cd\u4f5c\u4e86\u3002<\/p>\n
\u800c\u4e14\uff0cDOM \u5b8c\u5168\u4e0d\u5c5e\u4e8eJavascript (\u4e5f\u4e0d\u5728Javascript \u5f15\u64ce\u4e2d\u5b58\u5728).\u3002Javascript \u5176\u5b9e\u662f\u4e00\u4e2a\u975e\u5e38\u72ec\u7acb\u7684\u5f15\u64ce\uff0cDOM\u5176\u5b9e\u662f\u6d4f\u89c8\u5668\u5f15\u51fa\u7684\u4e00\u7ec4\u8ba9Javascript\u64cd\u4f5c\u7684API\u800c\u5df2\u3002\u5728\u5373\u65f6\u7f16\u8bd1\u7684\u65f6\u4ee3\uff0c\u8c03\u7528DOM\u7684\u5f00\u9500\u662f\u5f88\u5927\u7684\u3002\u800cVirtual DOM\u7684\u6267\u884c\u5b8c\u5168\u90fd\u5728Javascript \u5f15\u64ce\u4e2d\uff0c\u5b8c\u5168\u4e0d\u4f1a\u6709\u8fd9\u4e2a\u5f00\u9500\u3002<\/p>\n
React.js \u76f8\u5bf9\u4e8e\u76f4\u63a5\u64cd\u4f5c\u539f\u751fDOM\u6709\u5f88\u5927\u7684\u6027\u80fd\u4f18\u52bf\uff0c \u5f88\u5927\u7a0b\u5ea6\u4e0a\u90fd\u8981\u5f52\u529f\u4e8evirtual DOM\u7684batching \u548cdiff\u3002batching\u628a\u6240\u6709\u7684DOM\u64cd\u4f5c\u641c\u96c6\u8d77\u6765\uff0c\u4e00\u6b21\u6027\u63d0\u4ea4\u7ed9\u771f\u5b9e\u7684DOM\u3002diff\u7b97\u6cd5\u65f6\u95f4\u590d\u6742\u5ea6\u4e5f\u4ece\u6807\u51c6\u7684\u7684Diff\u7b97\u6cd5\u7684O(n^3)\u964d\u5230\u4e86O(n)\u3002\u8fd9\u91cc\u7559\u5230\u4e0b\u4e00\u6b21\u535a\u5ba2\u5355\u72ec\u8bb2\u3002<\/p>\n
\u4e09\u3001\u865a\u62dfDOM VS MVVM\uff1f<\/strong><\/span><\/p>\n
\u76f8\u6bd4\u8d77 React\uff0c\u5176\u4ed6 MVVM \u7cfb\u6846\u67b6\u6bd4\u5982 Angular, Knockout \u4ee5\u53ca Vue\u3001Avalon \u91c7\u7528\u7684\u90fd\u662f\uff1a\u901a\u8fc7 Directive\/Binding \u5bf9\u8c61\uff0c\u89c2\u5bdf\u6570\u636e\u53d8\u5316\u5e76\u4fdd\u7559\u5bf9\u5b9e\u9645 DOM \u5143\u7d20\u7684\u5f15\u7528\uff0c\u5f53\u6709\u6570\u636e\u53d8\u5316\u65f6\u8fdb\u884c\u5bf9\u5e94\u7684\u64cd\u4f5c\u3002MVVM \u7684\u53d8\u5316\u68c0\u67e5\u662f\u6570\u636e\u5c42\u9762\u7684\uff0c\u800c React \u7684\u68c0\u67e5\u662f DOM \u7ed3\u6784\u5c42\u9762\u7684\u3002MVVM \u7684\u6027\u80fd\u4e5f\u6839\u636e\u53d8\u52a8\u68c0\u6d4b\u7684\u5b9e\u73b0\u539f\u7406\u6709\u6240\u4e0d\u540c\uff1aAngular \u7684\u810f\u68c0\u67e5\u4f7f\u5f97\u4efb\u4f55\u53d8\u52a8\u90fd\u6709\u56fa\u5b9a\u7684 O(watcher count) \u7684\u4ee3\u4ef7\uff1bKnockout\/Vue\/Avalon \u90fd\u91c7\u7528\u4e86\u4f9d\u8d56\u6536\u96c6\uff0c\u5728 js \u548c DOM \u5c42\u9762\u90fd\u662f O(change)\uff1a<\/p>\n
    \n
  1. \n
    \u810f\u68c0\u67e5\uff1ascope digest + \u5fc5\u8981 DOM \u66f4\u65b0<\/p>\n<\/li>\n
  2. \n
    \u4f9d\u8d56\u6536\u96c6\uff1a\u91cd\u65b0\u6536\u96c6\u4f9d\u8d56 + \u5fc5\u8981 DOM \u66f4\u65b0<\/p>\n<\/li>\n<\/ol>\n
    \u53ef\u4ee5\u770b\u5230\uff0cAngular \u6700\u4e0d\u6548\u7387\u7684\u5730\u65b9\u5728\u4e8e\u4efb\u4f55\u5c0f\u53d8\u52a8\u90fd\u6709\u7684\u548c watcher \u6570\u91cf\u76f8\u5173\u7684\u6027\u80fd\u4ee3\u4ef7\u3002\u4f46\u662f\uff01\u5f53\u6240\u6709\u6570\u636e\u90fd\u53d8\u4e86\u7684\u65f6\u5019\uff0cAngular \u5176\u5b9e\u5e76\u4e0d\u5403\u4e8f\u3002\u4f9d\u8d56\u6536\u96c6\u5728\u521d\u59cb\u5316\u548c\u6570\u636e\u53d8\u5316\u7684\u65f6\u5019\u90fd\u9700\u8981\u91cd\u65b0\u6536\u96c6\u4f9d\u8d56\uff0c\u8fd9\u4e2a\u4ee3\u4ef7\u5728\u5c0f\u91cf\u66f4\u65b0\u7684\u65f6\u5019\u51e0\u4e4e\u53ef\u4ee5\u5ffd\u7565\uff0c\u4f46\u5728\u6570\u636e\u91cf\u5e9e\u5927\u7684\u65f6\u5019\u4e5f\u4f1a\u4ea7\u751f\u4e00\u5b9a\u7684\u6d88\u8017\u3002<\/p>\n
    MVVM \u6e32\u67d3\u5217\u8868\u7684\u65f6\u5019\uff0c\u7531\u4e8e\u6bcf\u4e00\u884c\u90fd\u6709\u81ea\u5df1\u7684\u6570\u636e\u4f5c\u7528\u57df\uff0c\u6240\u4ee5\u901a\u5e38\u90fd\u662f\u6bcf\u4e00\u884c\u6709\u4e00\u4e2a\u5bf9\u5e94\u7684 ViewModel \u5b9e\u4f8b\uff0c\u6216\u8005\u662f\u4e00\u4e2a\u7a0d\u5fae\u8f7b\u91cf\u4e00\u4e9b\u7684\u5229\u7528\u539f\u578b\u7ee7\u627f\u7684 “scope” \u5bf9\u8c61\uff0c\u4f46\u4e5f\u6709\u4e00\u5b9a\u7684\u4ee3\u4ef7\u3002\u6240\u4ee5\uff0cMVVM \u5217\u8868\u6e32\u67d3\u7684\u521d\u59cb\u5316\u51e0\u4e4e\u4e00\u5b9a\u6bd4 React \u6162\uff0c\u56e0\u4e3a\u521b\u5efa ViewModel \/ scope \u5b9e\u4f8b\u6bd4\u8d77 Virtual DOM \u6765\u8bf4\u8981\u6602\u8d35\u5f88\u591a\u3002\u8fd9\u91cc\u6240\u6709 MVVM \u5b9e\u73b0\u7684\u4e00\u4e2a\u5171\u540c\u95ee\u9898\u5c31\u662f\u5728\u5217\u8868\u6e32\u67d3\u7684\u6570\u636e\u6e90\u53d8\u52a8\u65f6\uff0c\u5c24\u5176\u662f\u5f53\u6570\u636e\u662f\u5168\u65b0\u7684\u5bf9\u8c61\u65f6\uff0c\u5982\u4f55\u6709\u6548\u5730\u590d\u7528\u5df2\u7ecf\u521b\u5efa\u7684 ViewModel \u5b9e\u4f8b\u548c DOM \u5143\u7d20\u3002\u5047\u5982\u6ca1\u6709\u4efb\u4f55\u590d\u7528\u65b9\u9762\u7684\u4f18\u5316\uff0c\u7531\u4e8e\u6570\u636e\u662f \u201c\u5168\u65b0\u201d \u7684\uff0cMVVM \u5b9e\u9645\u4e0a\u9700\u8981\u9500\u6bc1\u4e4b\u524d\u7684\u6240\u6709\u5b9e\u4f8b\uff0c\u91cd\u65b0\u521b\u5efa\u6240\u6709\u5b9e\u4f8b\uff0c\u6700\u540e\u518d\u8fdb\u884c\u4e00\u6b21\u6e32\u67d3\uff01\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u9898\u76ee\u91cc\u94fe\u63a5\u7684 angular\/knockout \u5b9e\u73b0\u90fd\u76f8\u5bf9\u6bd4\u8f83\u6162\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0cReact \u7684\u53d8\u52a8\u68c0\u67e5\u7531\u4e8e\u662f DOM \u7ed3\u6784\u5c42\u9762\u7684\uff0c\u5373\u4f7f\u662f\u5168\u65b0\u7684\u6570\u636e\uff0c\u53ea\u8981\u6700\u540e\u6e32\u67d3\u7ed3\u679c\u6ca1\u53d8\uff0c\u90a3\u4e48\u5c31\u4e0d\u9700\u8981\u505a\u65e0\u7528\u529f\u3002<\/p>\n
    Angular \u548c Vue \u90fd\u63d0\u4f9b\u4e86\u5217\u8868\u91cd\u7ed8\u7684\u4f18\u5316\u673a\u5236\uff0c\u4e5f\u5c31\u662f \u201c\u63d0\u793a\u201d \u6846\u67b6\u5982\u4f55\u6709\u6548\u5730\u590d\u7528\u5b9e\u4f8b\u548c DOM \u5143\u7d20\u3002\u6bd4\u5982\u6570\u636e\u5e93\u91cc\u7684\u540c\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5728\u4e24\u6b21\u524d\u7aef API \u8c03\u7528\u91cc\u9762\u4f1a\u6210\u4e3a\u4e0d\u540c\u7684\u5bf9\u8c61\uff0c\u4f46\u662f\u5b83\u4eec\u4f9d\u7136\u6709\u4e00\u6837\u7684 uid\u3002\u8fd9\u65f6\u5019\u4f60\u5c31\u53ef\u4ee5\u63d0\u793a track by uid \u6765\u8ba9 Angular \u77e5\u9053\uff0c\u8fd9\u4e24\u4e2a\u5bf9\u8c61\u5176\u5b9e\u662f\u540c\u4e00\u4efd\u6570\u636e\u3002\u90a3\u4e48\u539f\u6765\u8fd9\u4efd\u6570\u636e\u5bf9\u5e94\u7684\u5b9e\u4f8b\u548c DOM \u5143\u7d20\u90fd\u53ef\u4ee5\u590d\u7528\uff0c\u53ea\u9700\u8981\u66f4\u65b0\u53d8\u52a8\u4e86\u7684\u90e8\u5206\u3002\u6216\u8005\uff0c\u4f60\u4e5f\u53ef\u4ee5\u76f4\u63a5 track by $index \u6765\u8fdb\u884c \u201c\u539f\u5730\u590d\u7528\u201d\uff1a\u76f4\u63a5\u6839\u636e\u5728\u6570\u7ec4\u91cc\u7684\u4f4d\u7f6e\u8fdb\u884c\u590d\u7528\u3002\u5728\u9898\u76ee\u7ed9\u51fa\u7684\u4f8b\u5b50\u91cc\uff0c\u5982\u679c angular \u5b9e\u73b0\u52a0\u4e0a track by $index \u7684\u8bdd\uff0c\u540e\u7eed\u91cd\u7ed8\u662f\u4e0d\u4f1a\u6bd4 React \u6162\u591a\u5c11\u7684\u3002\u751a\u81f3\u5728 dbmonster \u6d4b\u8bd5\u4e2d\uff0cAngular \u548c Vue \u7528\u4e86 track by $index \u4ee5\u540e\u90fd\u6bd4 React \u5feb: dbmon (\u6ce8\u610f Angular \u9ed8\u8ba4\u7248\u672c\u65e0\u4f18\u5316\uff0c\u4f18\u5316\u8fc7\u7684\u5728\u4e0b\u9762\uff09<\/p>\n
    \u5728\u6bd4\u8f83\u6027\u80fd\u7684\u65f6\u5019\uff0c\u8981\u5206\u6e05\u695a\u521d\u59cb\u6e32\u67d3\u3001\u5c0f\u91cf\u6570\u636e\u66f4\u65b0\u3001\u5927\u91cf\u6570\u636e\u66f4\u65b0\u8fd9\u4e9b\u4e0d\u540c\u7684\u573a\u5408\u3002Virtual DOM\u3001\u810f\u68c0\u67e5 MVVM\u3001\u6570\u636e\u6536\u96c6 MVVM \u5728\u4e0d\u540c\u573a\u5408\u5404\u6709\u4e0d\u540c\u7684\u8868\u73b0\u548c\u4e0d\u540c\u7684\u4f18\u5316\u9700\u6c42\u3002Virtual DOM \u4e3a\u4e86\u63d0\u5347\u5c0f\u91cf\u6570\u636e\u66f4\u65b0\u65f6\u7684\u6027\u80fd\uff0c\u4e5f\u9700\u8981\u9488\u5bf9\u6027\u7684\u4f18\u5316\uff0c\u6bd4\u5982 shouldComponentUpdate \u6216\u662f immutable data\u3002<\/p>\n
      \n
    1. \n
      \u521d\u59cb\u6e32\u67d3\uff1aVirtual DOM > \u810f\u68c0\u67e5 >= \u4f9d\u8d56\u6536\u96c6<\/p>\n<\/li>\n
    2. \n
      \u5c0f\u91cf\u6570\u636e\u66f4\u65b0\uff1a\u4f9d\u8d56\u6536\u96c6 >> Virtual DOM + \u4f18\u5316 > \u810f\u68c0\u67e5\uff08\u65e0\u6cd5\u4f18\u5316\uff09 > Virtual DOM \u65e0\u4f18\u5316<\/p>\n<\/li>\n
    3. \n
      \u5927\u91cf\u6570\u636e\u66f4\u65b0\uff1a\u810f\u68c0\u67e5 + \u4f18\u5316 >= \u4f9d\u8d56\u6536\u96c6 + \u4f18\u5316 > Virtual DOM\uff08\u65e0\u6cd5\/\u65e0\u9700\u4f18\u5316\uff09>> MVVM \u65e0\u4f18\u5316<\/p>\n<\/li>\n
    4. \n
      \uff08\u8be5\u6bb5\u843d\u501f\u9274\u4e86\u77e5\u4e4e\u7684\u76f8\u5173\u56de\u7b54\uff09<\/p>\n<\/li>\n<\/ol>\n
      \u56db\u3001\u5bf9React\u865a\u62dfDOM\u7684\u8bef\u89e3\uff1f<\/strong><\/span><\/p>\n
      React \u4ece\u6765\u6ca1\u6709\u8bf4\u8fc7 \u201cReact \u6bd4\u539f\u751f\u64cd\u4f5c DOM \u5feb\u201d\u3002React\u7ed9\u6211\u4eec\u7684\u4fdd\u8bc1\u662f\uff0c\u5728\u4e0d\u9700\u8981\u624b\u52a8\u4f18\u5316\u7684\u60c5\u51b5\u4e0b\uff0c\u5b83\u4f9d\u7136\u53ef\u4ee5\u7ed9\u6211\u4eec\u63d0\u4f9b\u8fc7\u5f97\u53bb\u7684\u6027\u80fd\u3002<\/p>\n
      React\u63a9\u76d6\u4e86\u5e95\u5c42\u7684 DOM \u64cd\u4f5c\uff0c\u53ef\u4ee5\u7528\u66f4\u58f0\u660e\u5f0f\u7684\u65b9\u5f0f\u6765\u63cf\u8ff0\u6211\u4eec\u76ee\u7684\uff0c\u4ece\u800c\u8ba9\u4ee3\u7801\u66f4\u5bb9\u6613\u7ef4\u62a4\u3002\u4e0b\u9762\u8fd8\u662f\u501f\u9274\u4e86\u77e5\u4e4e\u4e0a\u7684\u56de\u7b54\uff1a\u6ca1\u6709\u4efb\u4f55\u6846\u67b6\u53ef\u4ee5\u6bd4\u7eaf\u624b\u52a8\u7684\u4f18\u5316 DOM \u64cd\u4f5c\u66f4\u5feb\uff0c\u56e0\u4e3a\u6846\u67b6\u7684 DOM \u64cd\u4f5c\u5c42\u9700\u8981\u5e94\u5bf9\u4efb\u4f55\u4e0a\u5c42 API \u53ef\u80fd\u4ea7\u751f\u7684\u64cd\u4f5c\uff0c\u5b83\u7684\u5b9e\u73b0\u5fc5\u987b\u662f\u666e\u9002\u7684\u3002\u9488\u5bf9\u4efb\u4f55\u4e00\u4e2a benchmark\uff0c\u6211\u90fd\u53ef\u4ee5\u5199\u51fa\u6bd4\u4efb\u4f55\u6846\u67b6\u66f4\u5feb\u7684\u624b\u52a8\u4f18\u5316\uff0c\u4f46\u662f\u90a3\u6709\u4ec0\u4e48\u610f\u4e49\u5462\uff1f\u5728\u6784\u5efa\u4e00\u4e2a\u5b9e\u9645\u5e94\u7528\u7684\u65f6\u5019\uff0c\u4f60\u96be\u9053\u4e3a\u6bcf\u4e00\u4e2a\u5730\u65b9\u90fd\u53bb\u505a\u624b\u52a8\u4f18\u5316\u5417\uff1f\u51fa\u4e8e\u53ef\u7ef4\u62a4\u6027\u7684\u8003\u8651\uff0c\u8fd9\u663e\u7136\u4e0d\u53ef\u80fd\u3002<\/p>\n
      \u76f8\u4fe1\u770b\u4e86\u672c\u6587\u6848\u4f8b\u4f60\u5df2\u7ecf\u638c\u63e1\u4e86\u65b9\u6cd5\uff0c\u66f4\u591a\u7cbe\u5f69\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n
      \u63a8\u8350\u9605\u8bfb\uff1a<\/p>\n
      <\/p>\n
      <\/p>\n
      \u4ee5\u4e0a\u5c31\u662f\u600e\u6837\u4f7f\u7528React\u865a\u62dfDOM\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u8fd9\u6b21\u7ed9\u5927\u5bb6\u5e26\u6765\u600e\u6837\u4f7f\u7528React\u865a\u62dfDOM\uff0c\u4f7f\u7528React\u865a\u62dfDOM\u7684\u6709\u54ea\u4e9b\uff0c\u4e0b\u9762\u5c31\u662f\u5b9e\u6218\u6848\u4f8b\uff0c\u4e00\u8d77\u6765\u770b\u4e00\u4e0b\u3002 \u5728Web\u5f00\u53d1\u4e2d\uff0c\u9700\u8981\u5c06\u6570\u636e\u7684\u53d8\u5316\u5b9e\u65f6\u53cd\u6620\u5230UI\u4e0a\uff0c\u8fd9\u65f6\u5c31\u9700\u8981\u5bf9DOM\u8fdb\u884c\u64cd\u4f5c\uff0c\u4f46\u662f\u590d\u6742\u6216\u9891\u7e41\u7684DOM\u64cd\u4f5c\u901a\u5e38\u662f\u6027\u80fd\u74f6\u9888\u4ea7\u751f\u7684\u539f\u56e0\uff0c\u4e3a\u6b64\uff0cReact\u5f15\u5165\u4e86\u865a\u62dfDOM\uff08Virtual DOM\uff09\u7684\u673a\u5236\u3002 \u4e00\u3001\u4ec0\u4e48\u662f\u865a\u62dfDOM\uff1f \u5728React\u4e2d\uff0crender\u6267\u884c\u7684\u7ed3\u679c\u5f97\u5230\u7684\u5e76\u4e0d\u662f\u771f\u6b63\u7684DOM\u8282\u70b9\uff0c\u7ed3\u679c\u4ec5\u4ec5\u662f\u8f7b\u91cf\u7ea7\u7684\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3avirtual DOM\u3002 \u865a\u62dfDOM\u662fReact\u7684\u4e00\u5927\u4eae\u70b9\uff0c\u5177\u6709batching(\u6279\u5904\u7406)\u548c\u9ad8\u6548\u7684Diff\u7b97\u6cd5\u3002\u8fd9\u8ba9\u6211\u4eec\u53ef\u4ee5\u65e0\u9700\u62c5\u5fc3\u6027\u80fd\u95ee\u9898\u800c\u201d\u6beb\u65e0\u987e\u5fcc\u201d\u7684\u968f\u65f6\u201c\u5237\u65b0\u201d\u6574\u4e2a\u9875\u9762\uff0c\u7531\u865a\u62df DOM\u6765\u786e\u4fdd\u53ea\u5bf9\u754c\u9762\u4e0a\u771f\u6b63\u53d8\u5316\u7684\u90e8\u5206\u8fdb\u884c\u5b9e\u9645\u7684DOM\u64cd\u4f5c\u3002\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\u57fa\u672c\u65e0\u9700\u5173\u5fc3\u865a\u62dfDOM\u662f\u5982\u4f55\u8fd0\u4f5c\u7684\uff0c\u4f46\u662f\u7406\u89e3\u5176\u8fd0\u884c\u673a\u5236\u4e0d\u4ec5\u6709\u52a9\u4e8e\u66f4\u597d\u7684\u7406\u89e3React\u7ec4\u4ef6\u7684\uff0c\u800c\u4e14\u5bf9\u4e8e\u8fdb\u4e00\u6b65\u4f18\u5316 React\u7a0b\u5e8f\u4e5f\u4f1a\u6709\u5f88\u5927\u5e2e\u52a9\u3002 \u4e8c\u3001\u865a\u62dfDOM VS \u76f4\u63a5\u64cd\u4f5c\u539f\u751fDOM\uff1f \u5982\u679c\u6ca1\u6709 Virtual DOM\uff0c\u7b80\u5355\u6765\u8bf4\u5c31\u662f\u76f4\u63a5\u91cd\u7f6e innerHTML\u3002\u8fd9\u6837\u64cd\u4f5c\uff0c\u5728\u4e00\u4e2a\u5927\u578b\u5217\u8868\u6240\u6709\u6570\u636e\u90fd\u53d8\u4e86\u7684\u60c5\u51b5\u4e0b\uff0c\u8fd8\u7b97\u662f\u5408\u7406\uff0c\u4f46\u662f\uff0c\u5f53\u53ea\u6709\u4e00\u884c\u6570\u636e\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u5b83\u4e5f\u9700\u8981\u91cd\u7f6e\u6574\u4e2a innerHTML\uff0c\u8fd9\u65f6\u5019\u663e\u7136\u5c31\u9020\u6210\u4e86\u5927\u91cf\u6d6a\u8d39\u3002 \u6bd4\u8f83innerHTML \u548cVirtual DOM \u7684\u91cd\u7ed8\u8fc7\u7a0b\u5982\u4e0b\uff1a innerHTML: render html string + \u91cd\u65b0\u521b\u5efa\u6240\u6709 DOM \u5143\u7d20 Virtual DOM: render Virtual DOM + diff + \u5fc5\u8981\u7684 DOM \u66f4\u65b0 \u548c DOM \u64cd\u4f5c\u6bd4\u8d77\u6765\uff0cjs \u8ba1\u7b97\u662f\u975e\u5e38\u4fbf\u5b9c\u7684\u3002Virtual DOM render + diff \u663e\u7136\u6bd4\u6e32\u67d3 html \u5b57\u7b26\u4e32\u8981\u6162\uff0c\u4f46\u662f\uff0c\u5b83\u4f9d\u7136\u662f\u7eaf js \u5c42\u9762\u7684\u8ba1\u7b97\uff0c\u6bd4\u8d77\u540e\u9762\u7684 DOM \u64cd\u4f5c\u6765\u8bf4\uff0c\u4f9d\u7136\u4fbf\u5b9c\u4e86\u592a\u591a\u3002\u5f53\u7136\uff0c\u66fe\u6709\u4eba\u505a\u8fc7\u9a8c\u8bc1\u8bf4React\u7684\u6027\u80fd\u4e0d\u5982\u76f4\u63a5\u64cd\u4f5c\u771f\u5b9eDOM\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[],"class_list":["post-31503","post","type-post","status-publish","format-standard","hentry","category-19"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/31503","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=31503"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/31503\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=31503"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=31503"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=31503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}