{"id":1975,"date":"2025-02-23T14:59:13","date_gmt":"2025-02-23T06:59:13","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=1975"},"modified":"2025-02-23T14:59:13","modified_gmt":"2025-02-23T06:59:13","slug":"html5-web-workers","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/02\/23\/html5-web-workers\/","title":{"rendered":"HTML5 Web Workers"},"content":{"rendered":"\n<p><strong>HTML5 Web Workers<\/strong> \u662f HTML5 \u5f15\u5165\u7684\u4e00\u4e2a\u529f\u80fd\uff0c\u65e8\u5728\u63d0\u4f9b\u4e00\u79cd\u673a\u5236\u6765\u6267\u884c\u540e\u53f0\u4efb\u52a1\u800c\u4e0d\u963b\u585e\u4e3b\u7ebf\u7a0b\u3002\u901a\u8fc7 Web Workers\uff0cJavaScript \u4ee3\u7801\u53ef\u4ee5\u5728\u540e\u53f0\u7ebf\u7a0b\u4e2d\u5e76\u884c\u6267\u884c\uff0c\u4ece\u800c\u907f\u514d UI \u963b\u585e\uff0c\u63d0\u9ad8\u6027\u80fd\uff0c\u7279\u522b\u662f\u5728\u9700\u8981\u8fdb\u884c\u5927\u91cf\u8ba1\u7b97\u6216\u8005\u5904\u7406\u590d\u6742\u4efb\u52a1\u65f6\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Web Workers \u7684\u5de5\u4f5c\u539f\u7406\uff1a<\/h3>\n\n\n\n<p>Web Workers \u5141\u8bb8 JavaScript \u4ee3\u7801\u5728\u5355\u72ec\u7684\u7ebf\u7a0b\u4e2d\u8fd0\u884c\uff0c\u800c\u4e0d\u5f71\u54cd\u4e3b\u7ebf\u7a0b\uff08\u5373\u9875\u9762\u7684\u6e32\u67d3\uff09\u3002\u8fd9\u4f7f\u5f97\u5e94\u7528\u53ef\u4ee5\u6267\u884c\u8ba1\u7b97\u5bc6\u96c6\u578b\u4efb\u52a1\u6216\u5904\u7406\u5927\u91cf\u6570\u636e\u65f6\uff0c\u4ecd\u4fdd\u6301\u54cd\u5e94\u5f0f\u754c\u9762\u3002\u901a\u8fc7\u4e0e\u4e3b\u7ebf\u7a0b\u7684\u6d88\u606f\u4f20\u9012\u673a\u5236\uff0cWeb Workers \u53ef\u4ee5\u4e0e\u9875\u9762\u8fdb\u884c\u4ea4\u4e92\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Web Workers \u7684\u7c7b\u578b\uff1a<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Dedicated Worker\uff1a<\/strong> \u6700\u5e38\u7528\u7684 Web Worker \u7c7b\u578b\uff0c\u9002\u7528\u4e8e\u4e3a\u5355\u4e2a\u9875\u9762\u521b\u5efa\u540e\u53f0\u4efb\u52a1\u3002\u6bcf\u4e2a Worker \u53ea\u4e0e\u4e00\u4e2a\u4e3b\u7ebf\u7a0b\u901a\u4fe1\u3002<\/li>\n\n\n\n<li><strong>Shared Worker\uff1a<\/strong> \u5141\u8bb8\u591a\u4e2a\u6d4f\u89c8\u5668\u7a97\u53e3\u6216\u6807\u7b7e\u9875\u5171\u4eab\u540c\u4e00\u4e2a\u540e\u53f0 Worker \u5b9e\u4f8b\u3002\u591a\u4e2a\u9875\u9762\u53ef\u4ee5\u901a\u8fc7\u8fd9\u4e2a Worker \u5b9e\u4f8b\u8fdb\u884c\u901a\u4fe1\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Web Workers \u7684\u57fa\u672c\u4f7f\u7528\uff1a<\/h3>\n\n\n\n<p>Web Workers \u901a\u8fc7\u6d4f\u89c8\u5668\u63d0\u4f9b\u7684 JavaScript API \u6765\u521b\u5efa\u548c\u7ba1\u7406\u3002\u521b\u5efa Worker \u65f6\uff0c\u4f1a\u542f\u52a8\u4e00\u4e2a\u5355\u72ec\u7684\u7ebf\u7a0b\uff0c\u5e76\u6267\u884c\u6307\u5b9a\u7684\u811a\u672c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u57fa\u672c\u8bed\u6cd5\uff1a<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. <strong>\u521b\u5efa\u548c\u542f\u52a8 Web Worker\uff1a<\/strong><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u521b\u5efa\u4e00\u4e2a\u65b0\u7684 Worker \u5b9e\u4f8b\nconst worker = new Worker('worker.js');  \/\/ \u4f20\u5165\u8981\u6267\u884c\u7684 JavaScript \u6587\u4ef6\u8def\u5f84<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">2. <strong>\u5728 Worker \u4e2d\u6267\u884c\u4ee3\u7801\uff1a<\/strong><\/h4>\n\n\n\n<p>Worker \u811a\u672c\uff08<code>worker.js<\/code>\uff09\u5305\u542b\u8981\u5728\u540e\u53f0\u6267\u884c\u7684 JavaScript \u4ee3\u7801\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ worker.js\nself.onmessage = function(e) {\n  const data = e.data;  \/\/ \u83b7\u53d6\u4e3b\u7ebf\u7a0b\u4f20\u9012\u7ed9 Worker \u7684\u6570\u636e\n  console.log('Received from main thread:', data);\n  \/\/ \u6267\u884c\u4e00\u4e9b\u8ba1\u7b97\u6216\u4efb\u52a1\n  const result = data * 2;  \/\/ \u5047\u8bbe\u6211\u4eec\u6267\u884c\u4e00\u4e2a\u7b80\u5355\u7684\u8ba1\u7b97\n  self.postMessage(result);  \/\/ \u5c06\u8ba1\u7b97\u7ed3\u679c\u53d1\u9001\u56de\u4e3b\u7ebf\u7a0b\n};<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">3. <strong>\u4e3b\u7ebf\u7a0b\u4e0e Worker \u8fdb\u884c\u901a\u4fe1\uff1a<\/strong><\/h4>\n\n\n\n<p>\u4e3b\u7ebf\u7a0b\u901a\u8fc7 <code>postMessage()<\/code> \u5411 Worker \u53d1\u9001\u6d88\u606f\uff0cWorker \u901a\u8fc7 <code>onmessage<\/code> \u4e8b\u4ef6\u63a5\u6536\u6d88\u606f\u5e76\u5904\u7406\u3002Worker \u4e5f\u53ef\u4ee5\u901a\u8fc7 <code>postMessage()<\/code> \u5c06\u7ed3\u679c\u4f20\u56de\u4e3b\u7ebf\u7a0b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u5728\u4e3b\u7ebf\u7a0b\u4e2d\nworker.onmessage = function(e) {\n  console.log('Received from worker:', e.data);  \/\/ \u63a5\u6536 Worker \u53d1\u9001\u7684\u6d88\u606f\n};\n\nworker.postMessage(10);  \/\/ \u5411 Worker \u53d1\u9001\u6d88\u606f\uff0c\u4f20\u9012\u6570\u636e<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Web Workers \u7684\u91cd\u8981\u65b9\u6cd5\u548c\u4e8b\u4ef6\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>postMessage()<\/code>\uff1a<\/strong> \u4e3b\u7ebf\u7a0b\u548c Worker \u7ebf\u7a0b\u4e4b\u95f4\u7684\u6d88\u606f\u4f20\u9012\u65b9\u6cd5\u3002\u901a\u8fc7\u5b83\uff0c\u4e3b\u7ebf\u7a0b\u53ef\u4ee5\u5c06\u6570\u636e\u4f20\u9012\u7ed9 Worker\uff0cWorker \u4e5f\u53ef\u4ee5\u5c06\u6570\u636e\u4f20\u9012\u56de\u4e3b\u7ebf\u7a0b\u3002<\/li>\n\n\n\n<li><strong><code>onmessage<\/code>\uff1a<\/strong> \u4e8b\u4ef6\u76d1\u542c\u5668\uff0c\u5f53 Worker \u53d1\u9001\u6d88\u606f\u56de\u4e3b\u7ebf\u7a0b\u65f6\u89e6\u53d1\u3002<\/li>\n\n\n\n<li><strong><code>terminate()<\/code>\uff1a<\/strong> \u7acb\u5373\u505c\u6b62 Worker \u6267\u884c\u3002\u4f7f\u7528\u65f6\u4e0d\u9700\u8981\u7b49\u5f85 Worker \u5b8c\u6210\u4efb\u52a1\uff0c\u53ef\u4ee5\u5f3a\u5236\u7ec8\u6b62\u7ebf\u7a0b\u3002<\/li>\n\n\n\n<li><strong><code>close()<\/code>\uff1a<\/strong> \u5728 Worker \u7ebf\u7a0b\u5185\u90e8\u8c03\u7528\uff0c\u8868\u793a Worker \u81ea\u5df1\u53ef\u4ee5\u7ed3\u675f\u6267\u884c\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u793a\u4f8b\uff1a\u4e3b\u7ebf\u7a0b\u4e0e Worker \u901a\u4fe1<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u4e3b\u7ebf\u7a0b\nconst worker = new Worker('worker.js');  \/\/ \u521b\u5efa Worker\n\nworker.onmessage = function(e) {\n  console.log('Received from worker:', e.data);  \/\/ \u63a5\u6536\u6765\u81ea Worker \u7684\u7ed3\u679c\n};\n\nworker.postMessage('Hello Worker');  \/\/ \u5411 Worker \u53d1\u9001\u6d88\u606f<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Worker (worker.js)\nself.onmessage = function(e) {\n  console.log('Received from main thread:', e.data);  \/\/ \u83b7\u53d6\u4e3b\u7ebf\u7a0b\u4f20\u6765\u7684\u6d88\u606f\n  self.postMessage('Hello from Worker');  \/\/ \u5411\u4e3b\u7ebf\u7a0b\u53d1\u9001\u6d88\u606f\n};<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u5f02\u5e38\u5904\u7406\uff1a<\/h3>\n\n\n\n<p>\u5982\u679c Worker \u5185\u90e8\u53d1\u751f\u9519\u8bef\uff0c\u53ef\u4ee5\u901a\u8fc7 <code>onerror<\/code> \u4e8b\u4ef6\u5904\u7406\u9519\u8bef\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>worker.onerror = function(e) {\n  console.error('Error occurred in worker:', e.message);\n};<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u5171\u4eab Worker \u793a\u4f8b\uff1a<\/h3>\n\n\n\n<p>\u5171\u4eab Worker \u5141\u8bb8\u591a\u4e2a\u6d4f\u89c8\u5668\u7a97\u53e3\u6216\u6807\u7b7e\u9875\u5171\u4eab\u540c\u4e00\u4e2a Worker \u5b9e\u4f8b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u4e3b\u7ebf\u7a0b\nconst sharedWorker = new SharedWorker('sharedWorker.js');\n\n\/\/ \u901a\u8fc7 message \u4f20\u9012\u6570\u636e\nsharedWorker.port.postMessage('Hello Shared Worker');\n\n\/\/ \u76d1\u542c\u6765\u81ea Worker \u7684\u6d88\u606f\nsharedWorker.port.onmessage = function(e) {\n  console.log('Received from shared worker:', e.data);\n};<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ sharedWorker.js\nonconnect = function(e) {\n  const port = e.ports&#91;0];  \/\/ \u83b7\u53d6\u4e0e\u4e3b\u7ebf\u7a0b\u7684\u901a\u4fe1\u7aef\u53e3\n  port.onmessage = function(event) {\n    console.log('Received from main thread:', event.data);\n    port.postMessage('Hello back from Shared Worker');\n  };\n};<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Web Workers \u7684\u9650\u5236\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u65e0 DOM \u64cd\u4f5c\uff1a<\/strong> Web Workers \u8fd0\u884c\u5728\u4e0d\u540c\u7684\u7ebf\u7a0b\u4e2d\uff0c\u56e0\u6b64\u65e0\u6cd5\u8bbf\u95ee\u4e3b\u7ebf\u7a0b\u4e2d\u7684 DOM\u3002\u5b83\u4eec\u53ea\u80fd\u6267\u884c\u8ba1\u7b97\u4efb\u52a1\uff0c\u4e0d\u80fd\u76f4\u63a5\u64cd\u4f5c\u9875\u9762\u5185\u5bb9\u3002<\/li>\n\n\n\n<li><strong>\u65e0\u7a97\u53e3\u5bf9\u8c61\uff1a<\/strong> Worker \u4e0d\u80fd\u8bbf\u95ee <code>window<\/code> \u5bf9\u8c61\u3002\u5b83\u53ea\u80fd\u8bbf\u95ee <code>self<\/code>\uff0c\u4ee3\u8868 Worker \u672c\u8eab\u3002<\/li>\n\n\n\n<li><strong>\u8d44\u6e90\u9650\u5236\uff1a<\/strong> \u7531\u4e8e Web Worker \u8fd0\u884c\u5728\u540e\u53f0\u7ebf\u7a0b\u4e2d\uff0c\u5b83\u4eec\u53d7\u9650\u4e8e\u6d4f\u89c8\u5668\u7684\u8d44\u6e90\u9650\u5236\uff0c\u4e0d\u80fd\u5360\u7528\u8fc7\u591a CPU \u6216\u5185\u5b58\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Web Workers \u7684\u5e94\u7528\u573a\u666f\uff1a<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8ba1\u7b97\u5bc6\u96c6\u578b\u4efb\u52a1\uff1a<\/strong> \u5bf9\u4e8e\u9700\u8981\u5927\u91cf\u8ba1\u7b97\u6216\u590d\u6742\u7b97\u6cd5\u7684\u4efb\u52a1\uff0c\u4f7f\u7528 Web Workers \u53ef\u4ee5\u5c06\u8ba1\u7b97\u79fb\u5230\u540e\u53f0\uff0c\u4ece\u800c\u907f\u514d\u4e3b\u7ebf\u7a0b\u7684\u963b\u585e\uff0c\u63d0\u9ad8\u9875\u9762\u54cd\u5e94\u6027\u3002<\/li>\n\n\n\n<li><strong>\u5e76\u884c\u6570\u636e\u5904\u7406\uff1a<\/strong> \u5bf9\u4e8e\u9700\u8981\u5904\u7406\u5927\u91cf\u6570\u636e\u7684\u5e94\u7528\uff08\u5982\u56fe\u50cf\u5904\u7406\u3001\u89c6\u9891\u89e3\u7801\u7b49\uff09\uff0cWeb Workers \u63d0\u4f9b\u4e86\u4e00\u4e2a\u5e76\u884c\u6267\u884c\u7684\u65b9\u5f0f\uff0c\u63d0\u5347\u6027\u80fd\u3002<\/li>\n\n\n\n<li><strong>\u5b9e\u65f6\u6570\u636e\u5206\u6790\uff1a<\/strong> \u5728\u9700\u8981\u5b9e\u65f6\u5206\u6790\u5927\u91cf\u6570\u636e\u7684\u573a\u666f\u4e2d\uff0cWeb Workers \u53ef\u4ee5\u5e2e\u52a9\u540e\u53f0\u5904\u7406\u6570\u636e\u5e76\u53ca\u65f6\u8fd4\u56de\u7ed3\u679c\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u603b\u7ed3\uff1a<\/h3>\n\n\n\n<p>Web Workers \u63d0\u4f9b\u4e86\u4e00\u79cd\u5728\u6d4f\u89c8\u5668\u4e2d\u5b9e\u73b0\u591a\u7ebf\u7a0b\u7684\u65b9\u5f0f\uff0c\u4f7f\u5f97 JavaScript \u53ef\u4ee5\u5728\u540e\u53f0\u8fd0\u884c\uff0c\u800c\u4e0d\u4f1a\u5f71\u54cd\u9875\u9762\u7684\u6e32\u67d3\u548c\u7528\u6237\u4ea4\u4e92\u3002\u5b83\u662f\u63d0\u9ad8 Web \u5e94\u7528\u6027\u80fd\u7684\u4e00\u4e2a\u6709\u529b\u5de5\u5177\uff0c\u5c24\u5176\u9002\u7528\u4e8e\u8ba1\u7b97\u5bc6\u96c6\u578b\u4efb\u52a1\u548c\u9700\u8981\u5e76\u884c\u5904\u7406\u7684\u573a\u666f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>HTML5 Web Workers \u662f HTML5 \u5f15\u5165\u7684\u4e00\u4e2a\u529f\u80fd\uff0c\u65e8\u5728\u63d0\u4f9b\u4e00\u79cd\u673a\u5236\u6765\u6267\u884c\u540e\u53f0\u4efb\u52a1\u800c\u4e0d\u963b\u585e\u4e3b\u7ebf [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[75],"tags":[],"class_list":["post-1975","post","type-post","status-publish","format-standard","hentry","category-html5"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/1975","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=1975"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/1975\/revisions"}],"predecessor-version":[{"id":1976,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/1975\/revisions\/1976"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=1975"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=1975"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=1975"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}