{"id":463,"date":"2020-02-14T18:48:52","date_gmt":"2020-02-14T10:48:52","guid":{"rendered":"https:\/\/blog.cqdefxxx.com\/?p=463"},"modified":"2020-02-14T18:48:52","modified_gmt":"2020-02-14T10:48:52","slug":"h5_web-workers_%e6%b5%8b%e8%af%95","status":"publish","type":"post","link":"https:\/\/blog.viter.top\/index.php\/2020\/02\/14\/h5_web-workers_%e6%b5%8b%e8%af%95\/","title":{"rendered":"H5_Web Workers_\u6d4b\u8bd5"},"content":{"rendered":"
<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n  <meta charset=\"UTF-8\">\n  <title>06_Web Workers_\u6d4b\u8bd5<\/title>\n<\/head>\n<body>\n<!--\n1. H5\u89c4\u8303\u63d0\u4f9b\u4e86js\u5206\u7ebf\u7a0b\u7684\u5b9e\u73b0, \u53d6\u540d\u4e3a: Web Workers\n2. \u76f8\u5173API\n  * Worker: \u6784\u9020\u51fd\u6570, \u52a0\u8f7d\u5206\u7ebf\u7a0b\u6267\u884c\u7684js\u6587\u4ef6\n  * Worker.prototype.onmessage: \u7528\u4e8e\u63a5\u6536\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u7684\u56de\u8c03\u51fd\u6570\n  * Worker.prototype.postMessage: \u5411\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u53d1\u9001\u6d88\u606f\n3. \u4e0d\u8db3\n  * worker\u5185\u4ee3\u7801\u4e0d\u80fd\u64cd\u4f5cDOM(\u66f4\u65b0UI)\n  * \u4e0d\u80fd\u8de8\u57df\u52a0\u8f7dJS\n  * \u4e0d\u662f\u6bcf\u4e2a\u6d4f\u89c8\u5668\u90fd\u652f\u6301\u8fd9\u4e2a\u65b0\u7279\u6027\n-->\n\n<input type=\"text\" placeholder=\"\u6570\u503c\" id=\"number\">\n<button id=\"btn\">\u8ba1\u7b97<\/button>\n<script type=\"text\/javascript\">\n  \/\/ 1 1 2 3 5 8    f(n) = f(n-1) + f(n-2)\n  function fibonacci(n) {\n    return n<=2 ? 1 : fibonacci(n-1) + fibonacci(n-2)  \/\/\u9012\u5f52\u8c03\u7528\n  }\n  \/\/ console.log(fibonacci(7))\n  var input = document.getElementById('number')\n  document.getElementById('btn').onclick = function () {\n    var number = input.value\n    var result = fibonacci(number)\n    alert(result)\n  }\n\n<\/script>\n<\/body>\n<\/html><\/code><\/pre>\n
<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n  <meta charset=\"UTF-8\">\n  <title>06_Web Workers_\u6d4b\u8bd5<\/title>\n<\/head>\n<body>\n<!--\n1. H5\u89c4\u8303\u63d0\u4f9b\u4e86js\u5206\u7ebf\u7a0b\u7684\u5b9e\u73b0, \u53d6\u540d\u4e3a: Web Workers\n2. \u76f8\u5173API\n  * Worker: \u6784\u9020\u51fd\u6570, \u52a0\u8f7d\u5206\u7ebf\u7a0b\u6267\u884c\u7684js\u6587\u4ef6\n  * Worker.prototype.onmessage: \u7528\u4e8e\u63a5\u6536\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u7684\u56de\u8c03\u51fd\u6570\n  * Worker.prototype.postMessage: \u5411\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u53d1\u9001\u6d88\u606f\n3. \u4e0d\u8db3\n  * worker\u5185\u4ee3\u7801\u4e0d\u80fd\u64cd\u4f5cDOM(\u66f4\u65b0UI)\n  * \u4e0d\u80fd\u8de8\u57df\u52a0\u8f7dJS\n  * \u4e0d\u662f\u6bcf\u4e2a\u6d4f\u89c8\u5668\u90fd\u652f\u6301\u8fd9\u4e2a\u65b0\u7279\u6027\n-->\n\n<input type=\"text\" placeholder=\"\u6570\u503c\" id=\"number\">\n<button id=\"btn\">\u8ba1\u7b97<\/button>\n<script type=\"text\/javascript\">\n  var input = document.getElementById('number')\n  document.getElementById('btn').onclick = function () {\n    var number = input.value\n\n    \/\/\u521b\u5efa\u4e00\u4e2aWorker\u5bf9\u8c61\n    var worker = new Worker('worker.js')\n    \/\/ \u7ed1\u5b9a\u63a5\u6536\u6d88\u606f\u7684\u76d1\u542c\n    worker.onmessage = function (event) {\n      console.log('\u4e3b\u7ebf\u7a0b\u63a5\u6536\u5206\u7ebf\u7a0b\u8fd4\u56de\u7684\u6570\u636e: '+event.data)\n      alert(event.data)\n    }\n\n    \/\/ \u5411\u5206\u7ebf\u7a0b\u53d1\u9001\u6d88\u606f\n    worker.postMessage(number)\n    console.log('\u4e3b\u7ebf\u7a0b\u5411\u5206\u7ebf\u7a0b\u53d1\u9001\u6570\u636e: '+number)\n  }\n  \/\/ console.log(this) \/\/ window\n\n<\/script>\n<\/body>\n<\/html><\/code><\/pre>\n
worker.js:<\/p>\n
function fibonacci(n) {\n  return n<=2 ? 1 : fibonacci(n-1) + fibonacci(n-2)  \/\/\u9012\u5f52\u8c03\u7528\n}\n\nconsole.log(this)\nthis.onmessage = function (event) {\n  var number = event.data\n  console.log('\u5206\u7ebf\u7a0b\u63a5\u6536\u5230\u4e3b\u7ebf\u7a0b\u53d1\u9001\u7684\u6570\u636e: '+number)\n  \/\/\u8ba1\u7b97\n  var result = fibonacci(number)\n  postMessage(result)\n  console.log('\u5206\u7ebf\u7a0b\u5411\u4e3b\u7ebf\u7a0b\u8fd4\u56de\u6570\u636e: '+result)\n  \/\/ alert(result)  alert\u662fwindow\u7684\u65b9\u6cd5, \u5728\u5206\u7ebf\u7a0b\u4e0d\u80fd\u8c03\u7528\n  \/\/ \u5206\u7ebf\u7a0b\u4e2d\u7684\u5168\u5c40\u5bf9\u8c61\u4e0d\u518d\u662fwindow, \u6240\u4ee5\u5728\u5206\u7ebf\u7a0b\u4e2d\u4e0d\u53ef\u80fd\u66f4\u65b0\u754c\u9762\n}<\/code><\/pre>\n
 <\/p>\n","protected":false},"excerpt":{"rendered":"
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