{"id":34174,"date":"2024-11-25T13:50:33","date_gmt":"2024-11-25T05:50:33","guid":{"rendered":"https:\/\/fwq.ai\/blog\/34174\/"},"modified":"2024-11-25T13:50:33","modified_gmt":"2024-11-25T05:50:33","slug":"%e8%ae%b0%e5%bd%95%e4%b8%80%e6%ac%a1%e5%ae%9e%e8%b7%b5%ef%bc%8c%e7%9c%8b%e7%9c%8b%e5%b0%8f%e7%a8%8b%e5%ba%8f%e8%b4%ad%e7%89%a9%e8%bd%a6%e5%8a%a8%e7%94%bb%e6%80%8e%e4%b9%88%e4%bc%98%e5%8c%96","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/34174\/","title":{"rendered":"\u8bb0\u5f55\u4e00\u6b21\u5b9e\u8df5\uff0c\u770b\u770b\u5c0f\u7a0b\u5e8f\u8d2d\u7269\u8f66\u52a8\u753b\u600e\u4e48\u4f18\u5316"},"content":{"rendered":"

\u672c\u7bc7\u6587\u7ae0\u7ed9\u5927\u5bb6\u5206\u4eab\u4e00\u6b21\u5c0f\u7a0b\u5e8f\u52a8\u753b\u4f18\u5316\u5b9e\u8df5\uff0c\u770b\u770b\u5c0f\u7a0b\u5e8f\u8d2d\u7269\u8f66\u52a8\u753b\u600e\u4e48\u4f18\u5316\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

\"\u8bb0\u5f55\u4e00\u6b21\u5b9e\u8df5\uff0c\u770b\u770b\u5c0f\u7a0b\u5e8f\u8d2d\u7269\u8f66\u52a8\u753b\u600e\u4e48\u4f18\u5316\u63d2\u56fe\"<\/p>\n

\u5c0f\u7a0b\u5e8f\u8d2d\u7269\u8f66\u52a8\u753b\u4f18\u5316<\/h2>\n

\n \u516c\u53f8\u5c0f\u7a0b\u5e8f\u70b9\u51fb\u52a0\u8d2d\u65f6\uff0c\u4f1a\u7ed8\u5236\u4e00\u4e2a\u629b\u7269\u7ebf\u52a8\u753b\uff0c\u8fd9\u4e2a\u629b\u7269\u7ebf\u52a8\u753b\u662f\u8ba1\u7b97\u51fa\u6765\u7684\u8d1d\u585e\u5c14\u66f2\u7ebf\u4e0a\u6bcf\u4e2a\u70b9\u7684\u5750\u6807\uff0c\u518d\u7531js\u904d\u5386\u70b9\u5750\u6807\uff0c\u7136\u540e\u52a8\u6001\u8bbe\u7f6e\u70b9\u7684\u6837\u5f0f\uff0c\u4ece\u800c\u5b9e\u73b0\u52a8\u753b\u3002\u4f46\u8fd9\u4f1a\u5e26\u6765\u5361\u987f\u6389\u5e27\u95ee\u9898\n<\/p><\/blockquote>\n

this.goodBoxTimer = setInterval(() =&gt; {\n  index--\n  this.setData({\n    'movingBallInfo.posX': linePos[index][0],\n    'movingBallInfo.posY': linePos[index][1],\n  })\n  if (index <p><span style=\"font-size: 16px;\"><strong>\u524d\u7f6e\u77e5\u8bc6\uff1aEvent Loop, Task, micro Task, UI Rendering<\/strong><\/span><\/p><p>javascript\u662f\u5355\u7ebf\u7a0b\u8bed\u8a00\uff0c\u8fd9\u5c31\u610f\u5473\u7740\u6240\u6709\u4efb\u52a1\u90fd\u8981\u8fdb\u884c\u6392\u961f\u3002\u4efb\u52a1\u5206\u4e3a\u4e24\u79cd\uff1a\u4e00\u79cd\u662f\u540c\u6b65\u4efb\u52a1(synchronous)\uff0c\u53e6\u4e00\u79cd\u662f\u5f02\u6b65\u4efb\u52a1(asynchronous)\u3002\u540c\u6b65\u4efb\u52a1\u6307\u7684\u662f\uff0c\u5728\u4e3b\u7ebf\u7a0b\u4e0a\u6392\u961f\u6267\u884c\u7684\u4efb\u52a1\uff0c\u53ea\u6709\u524d\u4e00\u4e2a\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\uff0c\u624d\u80fd\u6267\u884c\u540e\u4e00\u4e2a\u4efb\u52a1\uff1b\u5f02\u6b65\u4efb\u52a1\u6307\u7684\u662f\uff0c\u4e0d\u8fdb\u5165\u4e3b\u7ebf\u7a0b\u3001\u800c\u8fdb\u5165\"\u4efb\u52a1\u961f\u5217\"(task queue)\u7684\u4efb\u52a1\uff0c\u53ea\u6709\"\u4efb\u52a1\u961f\u5217\"\u901a\u77e5\u4e3b\u7ebf\u7a0b\uff0c\u67d0\u4e2a\u5f02\u6b65\u4efb\u52a1\u53ef\u4ee5\u6267\u884c\u4e86\uff0c\u8be5\u4efb\u52a1\u624d\u4f1a\u8fdb\u5165\u4e3b\u7ebf\u7a0b\u6267\u884c\u3002<\/p><p>\u800c\u5f02\u6b65\u4efb\u52a1\u53c8\u5206\u4e3a\u5b8f\u4efb\u52a1(Task)\u548c\u5fae\u4efb\u52a1(micro Task)\uff0c\u540c\u7406\u4efb\u52a1\u961f\u5217\u4e5f\u5206\u4e3a\u5b8f\u4efb\u52a1\u961f\u5217\u548c\u5fae\u4efb\u52a1\u961f\u5217\u3002<\/p><p>\u4e8b\u4ef6\u5faa\u73af(Event Loop) \u5927\u81f4\u6b65\u9aa4\uff1a<\/p><\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \n
  • \n
    \u6240\u6709\u540c\u6b65\u4efb\u52a1\u90fd\u5728\u4e3b\u7ebf\u7a0b\u4e0a\u6267\u884c\uff0c\u5f62\u6210\u4e00\u4e2a\u6267\u884c\u6808(execution context stack)\u3002<\/p>\n<\/li>\n
  • \n
    \u53ea\u8981\u5f02\u6b65\u4efb\u52a1\u6709\u4e86\u8fd0\u884c\u7ed3\u679c\uff0c\u5c31\u5728\u4efb\u52a1\u961f\u5217\u4e4b\u4e2d\u653e\u7f6e\u4e00\u4e2a\u4e8b\u4ef6\u3002<\/p>\n<\/li>\n
  • \n
    \u6267\u884c\u6808\u4e2d\u7684\u5b8f\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\uff0c\u5f15\u64ce\u4f1a\u5148\u8bfb\u53d6\u5fae\u4efb\u52a1\uff0c\u63a8\u5165\u6267\u884c\u6808\u3002\u6267\u884c\u5b8c\u6210\u4e4b\u540e\uff0c\u7ee7\u7eed\u8bfb\u53d6\u4e0b\u4e00\u4e2a\u5fae\u4efb\u52a1\u3002\u5982\u679c\u6267\u884c\u8fc7\u4e2d\u4ea7\u751f\u65b0\u7684\u5fae\u4efb\u52a1\uff0c\u5c31\u4f1a\u628a\u8fd9\u4e2a\u5fae\u4efb\u52a1\u63a8\u5165\u5fae\u4efb\u52a1\u961f\u5217\u3002\u5982\u679c\u4e3b\u7ebf\u7a0b\u6267\u884c\u5b8c\u6240\u6709\u5fae\u4efb\u52a1\u961f\u5217\u4e2d\u7684\u4efb\u52a1\u4e2d\u65f6\uff0c\u5c31\u4f1a\u53bb\u8bfb\u53d6\u5b8f\u4efb\u52a1\u961f\u5217\uff0c\u63a8\u5165\u6267\u884c\u6808\u3002<\/p>\n<\/li>\n
  • \n
    \u4e3b\u7ebf\u7a0b\u4e0d\u65ad\u91cd\u590d\u4e0a\u9762\u7684\u7b2c\u4e09\u6b65\u3002<\/p>\n<\/li>\n<\/ul>\n
    \u5e38\u89c1\u7684\u5b8f\u4efb\u52a1\uff1a<\/p>\n
      \n
    • setTimeout<\/li>\n
    • setInterval<\/li>\n
    • postMessage<\/li>\n
    • …<\/li>\n<\/ul>\n
      \u5e38\u89c1\u7684\u5fae\u4efb\u52a1\uff1a<\/p>\n
        \n
      • Promise<\/li>\n
      • MutationObserver<\/li>\n<\/ul>\n
        \u800cEvent Loop\u548cUI\u6e32\u67d3\u7684\u5173\u7cfb\u5462\uff1f\u5176\u5b9e\u662f\u5728\u6267\u884c\u5b8c\u5fae\u4efb\u52a1\u961f\u5217\u91cc\u6240\u6709\u5fae\u4efb\u52a1\u7684\u4e4b\u540e\uff0c\u7531\u6d4f\u89c8\u5668\u51b3\u5b9a\u662f\u5426\u8fdb\u884c\u6e32\u67d3\u66f4\u65b0\u3002<\/p>\n
        \/\/ demo1\n\/\/ \u6e32\u67d3\u53d1\u751f\u5728\u5fae\u4efb\u52a1\u4e4b\u540e\nconst con = document.getElementById('con');\ncon.onclick = function () {\n  Promise.resolve().then(function Promise1 () {\n    con.textContext = 0;\n  })\n};<\/pre>\n
         \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
        \"\u8bb0\u5f55\u4e00\u6b21\u5b9e\u8df5\uff0c\u770b\u770b\u5c0f\u7a0b\u5e8f\u8d2d\u7269\u8f66\u52a8\u753b\u600e\u4e48\u4f18\u5316\u63d2\u56fe1\"<\/p>\n
        \/\/ demo2\n\/\/ \u4e24\u6b21EventLoop\u4e2d\u95f4\u6ca1\u6709\u6e32\u67d3\nconst con = document.getElementById('con');\ncon.onclick = function () {\n  setTimeout(function setTimeout1() {\n      con.textContent = 0;\n      Promise.resolve().then(function Promise1 () {\n          console.log('Promise1')\n    })\n  }, 0)\n  setTimeout(function setTimeout2() {\n    con.textContent = 1;\n    Promise.resolve().then(function Promise2 () {\n        console.log('Promise2')\n    })\n  }, 0)\n};<\/pre>\n
         \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
        \"\u8bb0\u5f55\u4e00\u6b21\u5b9e\u8df5\uff0c\u770b\u770b\u5c0f\u7a0b\u5e8f\u8d2d\u7269\u8f66\u52a8\u753b\u600e\u4e48\u4f18\u5316\u63d2\u56fe2\"<\/p>\n
        \u6211\u4eec\u77e5\u9053\u6d4f\u89c8\u5668\u6b63\u5e38\u60c5\u51b5\u4e0b\u7684\u5e27\u7387\u662f60fps\uff0c\u5373\u4e00\u5e27\u7684\u65f6\u95f4\u5927\u7ea6\u4e3a16.66ms\u3002\u5982\u679c\u5728\u4e00\u5e27\u91cc\u5bf9Dom\u8fdb\u884c\u4e86\u4e24\u6b21\u4fee\u6539\uff0c\u90a3\u4e48\u6d4f\u89c8\u5668\u53ea\u4f1a\u53d6\u6700\u540e\u4e00\u6b21\u7684\u4fee\u6539\u503c\u53bb\u6e32\u67d3\u3002<\/p>\n
        \/\/ demo3\n\/\/ \u4e24\u6b21eventloop\u4e2d\u6709\u6e32\u67d3\nconst con = document.getElementById('con');\ncon.onclick = function () {\n  setTimeout(function  setTimeout1() {\n    con.textContent = 0;\n  }, 0);\n  setTimeout(function  setTimeout2() {\n    con.textContent = 1;\n  }, 16.7);\n};<\/pre>\n
         \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
        \"\u8bb0\u5f55\u4e00\u6b21\u5b9e\u8df5\uff0c\u770b\u770b\u5c0f\u7a0b\u5e8f\u8d2d\u7269\u8f66\u52a8\u753b\u600e\u4e48\u4f18\u5316\u63d2\u56fe3\"<\/p>\n
        \u5c3d\u91cf\u4e0d\u8981\u4f7f\u7528setInterval<\/strong><\/span><\/p>\n
        \u7531\u4e0a\u6587\u53ef\u77e5setInterval\u662f\u5b8f\u4efb\u52a1\uff0csetInterval\u6bcf\u9694\u5b9a\u4e49\u7684\u65f6\u95f4\u95f4\u9694\u5c31\u4f1a\u5f80\u5b8f\u4efb\u52a1\u961f\u5217\u63a8\u5165\u56de\u8c03\u51fd\u6570\uff0c\u7136\u540e\u4e3b\u7ebf\u7a0b\u4f1a\u8bfb\u53d6\u5b8f\u4efb\u52a1\u961f\u5217\u91cc\u7684setInterval\u56de\u8c03\u51fd\u6570\u5e76\u6267\u884c\u3002\u4f46\u662f\u5982\u679c\u4e3b\u7ebf\u7a0b\u6709\u957f\u4efb\u52a1(long task)\u6267\u884c\u65f6\uff0c\u4f1a\u963b\u585e\u8bfb\u53d6\uff0c\u76f4\u5230\u4e3b\u7ebf\u7a0b\u91cc\u7684\u4efb\u52a1\u6267\u884c\u5b8c\u624d\u4f1a\u7ee7\u7eed\u8bfb\u53d6\uff0c\u4f46setInterval\u5f80\u5b8f\u4efb\u52a1\u961f\u5217\u6dfb\u52a0\u56de\u8c03\u51fd\u6570\u7684\u64cd\u4f5c\u662f\u4e0d\u4f1a\u505c\u6b62\u7684\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5c31\u4f1a\u9020\u6210\uff1a\u51fd\u6570\u6267\u884c\u7684\u65f6\u95f4\u95f4\u9694\u8fdc\u5927\u4e8e\u6211\u4eec\u5b9a\u4e49\u7684\u65f6\u95f4\u95f4\u9694\u3002<\/p>\n
        \u4e0b\u9762\u662f\u4e00\u4e2a\u4f8b\u5b50\uff0c\u6bcf\u6b21setInterval\u56de\u8c03\u90fd\u9700\u8981\u8fdb\u884c\u5927\u91cf\u7684\u8ba1\u7b97\uff0c\u8fd9\u6837\u963b\u585e\u4e3b\u7ebf\u7a0b<\/p>\n
        \/\/ demo4\nconst btn = document.getElementById('btn')\nbtn.addEventListener('click', setIntervalFn)\nlet sum = 0\nfunction setIntervalFn() {\n  let last\n  let countIdx = 0\n  const timer = setInterval(function timeFn() {\n    countIdx++\n    const newTime = new Date().getTime()\n    const gap = newTime - last\n    last = newTime\n    console.log('setInterval', gap, countIdx)\n    if (countIdx &gt; 5) clearInterval(timer)\n    \/\/ 10000000\n    \/\/ 100000\n    for (let i = 0; i <p><img src=\"https:\/\/img.php.cn\/upload\/image\/176\/431\/251\/1640657815926480.png\" title=\"1640657815926480.png\" alt=\"4.png\"><\/p><p>setInterval\u7684\u7f3a\u70b9\uff1a<\/p><\/pre>\n
         \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
          \n
        • \u5f53\u4e3b\u7ebf\u7a0b\u6709\u4ee3\u7801\u6267\u884c\u65f6\uff0c\u5b8f\u4efb\u52a1\u961f\u5217\u4f1a\u4e00\u76f4\u6309\u7167\u4e00\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u63a8\u5165\u4e8b\u4ef6\u56de\u8c03\u51fd\u6570\u3002\u53ea\u6709\u5f53\u4e3b\u7ebf\u7a0b\u7a7a\u95f2\u65f6\uff0c\u624d\u4f1a\u628a\u56de\u8c03\u51fd\u6570\u6267\u884c\uff0c\u4f46\u662f\u8fd9\u4e9b\u56de\u8c03\u51fd\u6570\u5927\u591a\u90fd\u662f\u8fc7\u65f6\u7684\u3002<\/li>\n
        • \u5982\u679csetInterval\u7684\u56de\u8c03\u95f4\u9694\u6bd4\u6d4f\u89c8\u5668\u6e32\u67d3\u4e00\u5e27\u7684\u65f6\u95f4\u8981\u77ed\uff0c\u90a3\u4e48\u56de\u8c03\u51fd\u6570\u6267\u884c\u4e86\u591a\u6b21\uff0c\u4f46\u53ea\u4f1a\u7528\u5230\u6700\u540e\u4e00\u6b21\u7684\u7ed3\u679c\uff0c\u8fd9\u6837\u4e5f\u4f1a\u9020\u6210\u6d6a\u8d39\uff0c\u751a\u81f3\u6709\u53ef\u80fd\u4f1a\u963b\u585e\u4e3b\u7ebf\u7a0b\u3002<\/li>\n<\/ul>\n
          \u6240\u4ee5\u5c3d\u91cf\u8981\u7528setTimeout\u53bb\u4ee3\u66ffsetInterval<\/p>\n
          \u4f7f\u7528requestAnimationFrame<\/strong><\/span><\/p>\n
          \u5982\u679c\u7528js\u53bb\u7ed8\u5236\u52a8\u753b\uff0c\u8fd8\u662f\u7528\u5b98\u65b9\u63a8\u8350\u7684requestAnimationFrame\uff0c\u800c\u4e0d\u662fsetTimeout\u3002<\/p>\n
          \n
          window.requestAnimationFrame() \u544a\u8bc9\u6d4f\u89c8\u5668\u2014\u2014\u4f60\u5e0c\u671b\u6267\u884c\u4e00\u4e2a\u52a8\u753b\uff0c\u5e76\u4e14\u8981\u6c42\u6d4f\u89c8\u5668\u5728\u4e0b\u6b21\u91cd\u7ed8\u4e4b\u524d\u8c03\u7528\u6307\u5b9a\u7684\u56de\u8c03\u51fd\u6570\u66f4\u65b0\u52a8\u753b<\/p>\n<\/blockquote>\n
          \u7531\u4e0a\u9762\u7684\u4f8b\u5b50\u53ef\u77e5\uff0c\u4e24\u4e2a\u5b8f\u4efb\u52a1\u4e4b\u95f4\u4e0d\u4e00\u5b9a\u4f1a\u89e6\u53d1\u6d4f\u89c8\u5668\u6e32\u67d3\uff0c\u8fd9\u4e2a\u7531\u6d4f\u89c8\u5668\u81ea\u5df1\u51b3\u5b9a\uff0c\u5e76\u4e14\u6d4f\u89c8\u5668\u7684\u5e27\u7387\u5e76\u4f1a\u4e00\u76f4\u662f60fps\uff0c\u6709\u65f6\u53ef\u80fd\u4f1a\u4e0b\u964d\u523030fps\uff0c\u800csetTimeout\u7684\u56de\u8c03\u65f6\u95f4\u662f\u5199\u6b7b\u7684\uff0c\u5c31\u6709\u53ef\u80fd\u5bfc\u81f4\u4fee\u6539\u4e86\u591a\u6b21Dom\uff0c\u800c\u53ea\u89e6\u53d1\u4e86\u4e00\u6b21ui\u66f4\u65b0\uff0c\u9020\u6210\u6389\u5e27\u3002<\/p>\n
          \/\/ demo5\nconst con = document.getElementById('con');\nlet i = 0;\nfunction rAF(){\n  requestAnimationFrame(function aaaa() {\n    con.textContent = i;\n    Promise.resolve().then(function bbbb(){\n      if(i <p><img src=\"https:\/\/img.php.cn\/upload\/image\/412\/705\/313\/1640657854778507.png\" title=\"1640657854778507.png\" alt=\"5.png\"><\/p><p>\u53ef\u4ee5\u770b\u5230\u6e32\u67d3\u4e865\u6b21\uff08\u4e94\u6761\u7ad6\u76f4\u865a\u7ebf\uff09<\/p><p><span   style=\"max-width:90%\"><strong>\u5c0f\u7a0b\u5e8f\u4e0a\u7684\u52a8\u753b\u4f18\u5316<\/strong><\/span><\/p><p>\u5c0f\u7a0b\u5e8f\u662f\u53cc\u7ebf\u7a0b\u67b6\u6784<\/p><p><img src=\"https:\/\/img.php.cn\/upload\/image\/416\/262\/830\/1640657858530582.png\" title=\"1640657858530582.png\" alt=\"6.png\"><\/p><p>\u597d\u5904\u662f\uff1aui\u6e32\u67d3\u548cjs\u4e3b\u7ebf\u7a0b\u662f\u5206\u5f00\u7684\uff0c\u6211\u4eec\u77e5\u9053\u5728\u6d4f\u89c8\u5668\u4e2d\u8fd9\u4e24\u8005\u662f\u4e92\u65a5\u7684\uff0c\u6240\u4ee5\u5f53\u4e3b\u7ebf\u7a0b\u6709\u963b\u585e\u65f6\uff0c\u9875\u9762\u4ea4\u4e92\u5c31\u4f1a\u5931\u53bb\u54cd\u5e94\uff0c\u800c\u5c0f\u7a0b\u5e8f\u4e2d\u4e0d\u4f1a\u51fa\u73b0\u8fd9\u6837\u7684\u60c5\u51b5\u3002<\/p><p>\u574f\u5904\u662f\uff1a\u903b\u8f91\u5c42\u3001\u6e32\u67d3\u5c42\u6709\u901a\u4fe1\u5ef6\u65f6\uff0c\u5927\u91cf\u7684\u901a\u4fe1\u4e5f\u4f1a\u9020\u6210\u6027\u80fd\u74f6\u9888\u3002<\/p><p>\u5c0f\u7a0b\u5e8f\u63d0\u4f9b\u4e86wxs\u7528\u6765\u5904\u7406\u6e32\u67d3\u5c42\u7684\u903b\u8f91\u3002<\/p><p><span   style=\"max-width:90%\"><strong>\u8d2d\u7269\u8f66\u629b\u7269\u7ebf\u52a8\u753b\u4f18\u5316<\/strong><\/span><\/p><p>\u6240\u4ee5\u6211\u4eec\u4e0d\u5e94\u8be5\u7528setInterval\u53bb\u6267\u884c\u52a8\u753b\uff0c\u6211\u4eec\u4fee\u6539\u6210\uff0c\u5f53\u70b9\u51fb\u52a0\u8d2d\u65f6\uff0c\u628a\u70b9\u51fb\u5750\u6807\u4e0e\u76ee\u6807\u5750\u6807\u4f20\u5165wxs\uff0c\u7136\u540e\u8ba1\u7b97\u8fd0\u884c\u8f68\u8ff9\u70b9\u7684\u5750\u6807\u8ba1\u7b97\uff0c\u63a5\u7740\u7528requestAnimationFrame\u6267\u884c\u52a8\u753b\u5e27<\/p><pre class=\"brush:js;toolbar:false;\">\/\/ wxs\nfunction executeCartAnimation () {\n  curCoordIdx = coordArr.length - 1\n  ins.requestAnimationFrame(setStyleByFrame)\n}\n\nfunction setStyleByFrame() {\n  if (curCoordIdx &gt;= 0) {\n    ins.selectComponent('.cart-animation').setStyle({\n      display: 'block',\n      left: coordArr[curCoordIdx].x + 'px', \n      top: coordArr[curCoordIdx].y + 'px'\n    })\n    curCoordIdx -= 1\n    ins.requestAnimationFrame(setStyleByFrame)\n  } else {\n    ins.selectComponent('.cart-animation').setStyle({\n      display: 'none'\n    })\n  }\n}<\/pre>\n
           \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
          \u5728\u771f\u673a\u4e0a\u6548\u679c\u975e\u5e38\u660e\u663e\uff0c\u4f4e\u7aef\u5b89\u5353\u673a\u4e0a\u7684\u52a8\u753b\u4e5f\u975e\u5e38\u4e1d\u6ed1\u3002\u4f46\u662f\u5f55\u5c4f\u6548\u679c\u4e0d\u597d\uff0c\u8fd9\u91cc\u5c31\u4e0d\u653e\u4e86\u3002<\/p>\n
          \u3010\u76f8\u5173\u5b66\u4e60\u63a8\u8350\uff1a\u3011<\/p>\n
          \u4ee5\u4e0a\u5c31\u662f\u8bb0\u5f55\u4e00\u6b21\u5b9e\u8df5\uff0c\u770b\u770b\u5c0f\u7a0b\u5e8f\u8d2d\u7269\u8f66\u52a8\u753b\u600e\u4e48\u4f18\u5316\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":"
          \u672c\u7bc7\u6587\u7ae0\u7ed9\u5927\u5bb6\u5206\u4eab\u4e00\u6b21\u5c0f\u7a0b\u5e8f\u52a8\u753b\u4f18\u5316\u5b9e\u8df5\uff0c\u770b\u770b\u5c0f\u7a0b\u5e8f\u8d2d\u7269\u8f66\u52a8\u753b\u600e\u4e48\u4f18\u5316\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u6709\u6240\u5e2e\u52a9\uff01 \u5c0f\u7a0b\u5e8f\u8d2d\u7269\u8f66\u52a8\u753b\u4f18\u5316 \u516c\u53f8\u5c0f\u7a0b\u5e8f\u70b9\u51fb\u52a0\u8d2d\u65f6\uff0c\u4f1a\u7ed8\u5236\u4e00\u4e2a\u629b\u7269\u7ebf\u52a8\u753b\uff0c\u8fd9\u4e2a\u629b\u7269\u7ebf\u52a8\u753b\u662f\u8ba1\u7b97\u51fa\u6765\u7684\u8d1d\u585e\u5c14\u66f2\u7ebf\u4e0a\u6bcf\u4e2a\u70b9\u7684\u5750\u6807\uff0c\u518d\u7531js\u904d\u5386\u70b9\u5750\u6807\uff0c\u7136\u540e\u52a8\u6001\u8bbe\u7f6e\u70b9\u7684\u6837\u5f0f\uff0c\u4ece\u800c\u5b9e\u73b0\u52a8\u753b\u3002\u4f46\u8fd9\u4f1a\u5e26\u6765\u5361\u987f\u6389\u5e27\u95ee\u9898 this.goodBoxTimer = setInterval(() =&gt; {   index–   this.setData({     ‘movingBallInfo.posX’: linePos[index][0],     ‘movingBallInfo.posY’: linePos[index][1],   })   if (index <p><span style=”font-size: 16px;”><strong>\u524d\u7f6e\u77e5\u8bc6\uff1aEvent Loop, Task, micro Task, UI Rendering<\/strong><\/span><\/p><p>javascript\u662f\u5355\u7ebf\u7a0b\u8bed\u8a00\uff0c\u8fd9\u5c31\u610f\u5473\u7740\u6240\u6709\u4efb\u52a1\u90fd\u8981\u8fdb\u884c\u6392\u961f\u3002\u4efb\u52a1\u5206\u4e3a\u4e24\u79cd\uff1a\u4e00\u79cd\u662f\u540c\u6b65\u4efb\u52a1(synchronous)\uff0c\u53e6\u4e00\u79cd\u662f\u5f02\u6b65\u4efb\u52a1(asynchronous)\u3002\u540c\u6b65\u4efb\u52a1\u6307\u7684\u662f\uff0c\u5728\u4e3b\u7ebf\u7a0b\u4e0a\u6392\u961f\u6267\u884c\u7684\u4efb\u52a1\uff0c\u53ea\u6709\u524d\u4e00\u4e2a\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\uff0c\u624d\u80fd\u6267\u884c\u540e\u4e00\u4e2a\u4efb\u52a1\uff1b\u5f02\u6b65\u4efb\u52a1\u6307\u7684\u662f\uff0c\u4e0d\u8fdb\u5165\u4e3b\u7ebf\u7a0b\u3001\u800c\u8fdb\u5165”\u4efb\u52a1\u961f\u5217”(task queue)\u7684\u4efb\u52a1\uff0c\u53ea\u6709”\u4efb\u52a1\u961f\u5217”\u901a\u77e5\u4e3b\u7ebf\u7a0b\uff0c\u67d0\u4e2a\u5f02\u6b65\u4efb\u52a1\u53ef\u4ee5\u6267\u884c\u4e86\uff0c\u8be5\u4efb\u52a1\u624d\u4f1a\u8fdb\u5165\u4e3b\u7ebf\u7a0b\u6267\u884c\u3002<\/p><p>\u800c\u5f02\u6b65\u4efb\u52a1\u53c8\u5206\u4e3a\u5b8f\u4efb\u52a1(Task)\u548c\u5fae\u4efb\u52a1(micro Task)\uff0c\u540c\u7406\u4efb\u52a1\u961f\u5217\u4e5f\u5206\u4e3a\u5b8f\u4efb\u52a1\u961f\u5217\u548c\u5fae\u4efb\u52a1\u961f\u5217\u3002<\/p><p>\u4e8b\u4ef6\u5faa\u73af(Event Loop) \u5927\u81f4\u6b65\u9aa4\uff1a<\/p> \u767b\u5f55\u540e\u590d\u5236 \u6240\u6709\u540c\u6b65\u4efb\u52a1\u90fd\u5728\u4e3b\u7ebf\u7a0b\u4e0a\u6267\u884c\uff0c\u5f62\u6210\u4e00\u4e2a\u6267\u884c\u6808(execution context stack)\u3002 \u53ea\u8981\u5f02\u6b65\u4efb\u52a1\u6709\u4e86\u8fd0\u884c\u7ed3\u679c\uff0c\u5c31\u5728\u4efb\u52a1\u961f\u5217\u4e4b\u4e2d\u653e\u7f6e\u4e00\u4e2a\u4e8b\u4ef6\u3002 \u6267\u884c\u6808\u4e2d\u7684\u5b8f\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\uff0c\u5f15\u64ce\u4f1a\u5148\u8bfb\u53d6\u5fae\u4efb\u52a1\uff0c\u63a8\u5165\u6267\u884c\u6808\u3002\u6267\u884c\u5b8c\u6210\u4e4b\u540e\uff0c\u7ee7\u7eed\u8bfb\u53d6\u4e0b\u4e00\u4e2a\u5fae\u4efb\u52a1\u3002\u5982\u679c\u6267\u884c\u8fc7\u4e2d\u4ea7\u751f\u65b0\u7684\u5fae\u4efb\u52a1\uff0c\u5c31\u4f1a\u628a\u8fd9\u4e2a\u5fae\u4efb\u52a1\u63a8\u5165\u5fae\u4efb\u52a1\u961f\u5217\u3002\u5982\u679c\u4e3b\u7ebf\u7a0b\u6267\u884c\u5b8c\u6240\u6709\u5fae\u4efb\u52a1\u961f\u5217\u4e2d\u7684\u4efb\u52a1\u4e2d\u65f6\uff0c\u5c31\u4f1a\u53bb\u8bfb\u53d6\u5b8f\u4efb\u52a1\u961f\u5217\uff0c\u63a8\u5165\u6267\u884c\u6808\u3002 \u4e3b\u7ebf\u7a0b\u4e0d\u65ad\u91cd\u590d\u4e0a\u9762\u7684\u7b2c\u4e09\u6b65\u3002 \u5e38\u89c1\u7684\u5b8f\u4efb\u52a1\uff1a setTimeout setInterval postMessage … \u5e38\u89c1\u7684\u5fae\u4efb\u52a1\uff1a Promise MutationObserver \u800cEvent Loop\u548cUI\u6e32\u67d3\u7684\u5173\u7cfb\u5462\uff1f\u5176\u5b9e\u662f\u5728\u6267\u884c\u5b8c\u5fae\u4efb\u52a1\u961f\u5217\u91cc\u6240\u6709\u5fae\u4efb\u52a1\u7684\u4e4b\u540e\uff0c\u7531\u6d4f\u89c8\u5668\u51b3\u5b9a\u662f\u5426\u8fdb\u884c\u6e32\u67d3\u66f4\u65b0\u3002 \/\/ demo1 \/\/ \u6e32\u67d3\u53d1\u751f\u5728\u5fae\u4efb\u52a1\u4e4b\u540e const con = document.getElementById(‘con’); con.onclick = function () {   Promise.resolve().then(function Promise1 () {     con.textContext = 0;   }) }; \u767b\u5f55\u540e\u590d\u5236 \/\/ demo2 \/\/ \u4e24\u6b21EventLoop\u4e2d\u95f4\u6ca1\u6709\u6e32\u67d3 const con = document.getElementById(‘con’); con.onclick = function () {   setTimeout(function setTimeout1() {       con.textContent = 0;       Promise.resolve().then(function Promise1 () { […]<\/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-34174","post","type-post","status-publish","format-standard","hentry","category-19"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/34174","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=34174"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/34174\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=34174"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=34174"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=34174"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}