{"id":6938,"date":"2018-10-15T15:04:25","date_gmt":"2018-10-15T07:04:25","guid":{"rendered":"https:\/\/sdeno.com\/?p=6938"},"modified":"2024-04-02T14:59:41","modified_gmt":"2024-04-02T06:59:41","slug":"javascript%e5%a4%9a%e7%ba%bf%e7%a8%8b%e7%9a%84%e5%ae%9e%e7%8e%b0-web-worker","status":"publish","type":"post","link":"https:\/\/sdeno.com\/?p=6938","title":{"rendered":"javascript\u591a\u7ebf\u7a0b\u7684\u5b9e\u73b0\u2014\u2014web worker"},"content":{"rendered":"

Web Worker\u517c\u5bb9ie10\u4ee5\u4e0a\u5305\u62ecie10\u00a0 \u00a0 js \u591a\u7ebf\u7a0b<\/p>\n

\u63a8\u8350\u5148\u770b\u5173\u4e8e\u8fdb\u7a0b\u548c\u7ebf\u7a0b\u7684\u5173\u7cfb\uff1ahttps:\/\/sdeno.com\/?p=6455<\/a><\/p>\n

\u80cc\u666f\u4ecb\u7ecd\uff1a<\/span>
\njs\u662f\u5355\u7ebf\u7a0b\uff0c\u5728\u6267\u884cjs\u7684\u4ee3\u7801\u65f6\uff0c\u603b\u8981\u7b49\u5f85\u5176\u4ed6\u4ee3\u7801\u6267\u884c\u5b8c\u6bd5\u540e\u624d\u80fd\u53bb\u6267\u884c\u5176\u4ed6\u4ee3\u7801\uff0c\u6240\u6709\u4efb\u52a1\u53ea\u80fd\u5728\u4e00\u4e2a\u7ebf\u7a0b\u4e0a\u5b8c\u6210\uff0c\u4e00\u6b21\u53ea\u80fd\u505a\u4e00\u4ef6\u4e8b
\n\u3002\u524d\u9762\u7684\u4efb\u52a1\u6ca1\u505a\u5b8c\uff0c\u540e\u9762\u7684\u4efb\u52a1\u53ea\u80fd\u7b49\u7740\u3002\u968f\u7740\u7535\u8111\u8ba1\u7b97\u80fd\u529b\u7684\u589e\u5f3a\uff0c\u5c24\u5176\u662f\u591a\u6838 CPU \u7684\u51fa\u73b0\uff0c\u5355\u7ebf\u7a0b\u5e26\u6765\u5f88\u5927\u7684\u4e0d\u4fbf\uff0c\u65e0\u6cd5\u5145\u5206\u53d1\u6325
\n\u8ba1\u7b97\u673a\u7684\u8ba1\u7b97\u80fd\u529b\u3002<\/p>\n

Web Worker\u4f5c\u7528\u5c31\u662f\u4e3ajs\u521b\u5efa\u5b50\u7ebf\u7a0b\uff0cjs\u4e3b\u7ebf\u7a0b\u8d1f\u8d23UI\u4ea4\u4e92\uff0c\u5b50\u7ebf\u7a0b\u8d1f\u8d23\u5bc6\u96c6\u578b\u8fd0\u7b97\uff0c\u4e24\u7ebf\u7a0b\u540c\u65f6\u8fd0\u884c\u4e92\u4e0d\u5f71\u54cd\u907f\u514d\u963b\u585e\uff0c\u6700\u7ec8\u5b50\u7ebf\u7a0b\u5728\u628a
\n\u6570\u636e\u7ed3\u679c\u8fd4\u56de\u7ed9\u4e3b\u7ebf\u7a0b\u3002<\/p>\n

 <\/p>\n

\u6848\u4f8b\uff1a<\/p>\n

<script>\r\n var worker = new Worker('.\/js\/a.js'); \/\/\u521b\u5efa\u4e00\u4e2a\u5b50\u8fdb\u7a0b\r\n worker.postMessage({num:1}); \/\/\u6570\u636e\u4f20\u7ed9\u5b50\u7ebf\u7a0b\r\n\r\n worker.onmessage = function (event) { \/\/\u63a5\u6536\u5b50\u8fdb\u7a0b\u8fd4\u56de\u7684\u6570\u636e\r\n   console.log('\u8fd9\u91cc\u63a5\u6536\u5b50\u7ebf\u7a0b\u8fd4\u56de\u7684\u6570\u636e\uff1a' + event.data);\r\n   worker.terminate();  \/\/\u6267\u884c\u5b8c\u6bd5\u5173\u95ed\r\n }\r\n <\/script><\/pre>\n
 <\/p>\n
\/\/ a.js\u00a0 \uff0c\u5b50\u8fdb\u7a0b<\/p>\n
self.addEventListener('message', function (e) {\r\n  self.postMessage('\u8fd9\u91cc\u662f\u5b50\u7ebf\u7a0b\u7684\u6570\u636e=' + e.data.num); \/\/\u91cc\u9762\u7684\u6570\u636e\u8fd4\u56de\u7ed9\u4e3b\u7ebf\u7a0b\r\n  self.close(); \/\/\u5b50\u8fdb\u7a0b\u6267\u884c\u5b8c\u6bd5\u65f6\u5173\u95ed\r\n}, false);<\/pre>\n
 <\/p>\n
\u5728\u7ebf\u6848\u4f8b\uff1ademo<\/a><\/p>\n
 <\/p>\n
Web Worker\u7279\u6027\uff1a<\/span><\/p>\n
1\uff0cWorker \u5b50\u7ebf\u7a0b\u4e00\u65e6\u65b0\u5efa\u6210\u529f\uff0c\u5c31\u4f1a\u4e0d\u505c\u7684\u5faa\u73af\u7684\u6267\u884c\u3002\u8981\u8bb0\u5f97\u5173\u95ed<\/p>\n
\/\/ \u5173\u95ed\u4e3b\u7ebf\u7a0b\r\nworker.terminate();\r\n\r\n\/\/ \u5173\u95edWorker \u5b50\u7ebf\u7a0b\r\nself.close();<\/pre>\n
2\uff0c\u540c\u6e90\u7b56\u7565
\nnew Worker(‘.\/js\/a.js’)\u5728\u52a0\u8f7d\u811a\u672c\u65f6\u4e0d\u8981\u6d89\u53ca\u5230\u8de8\u57df\uff0c\u5fc5\u987b\u4e0e\u4e3b\u7ebf\u7a0b\u7684\u811a\u672c\u6587\u4ef6\u540c\u6e90\u3002<\/p>\n
3\uff0cDOM\u9650\u5236<\/p>\n
Worker\u5b50\u7ebf\u7a0b\u53ea\u80fd\u8bbf\u95ee\uff0cnavigator\u5bf9\u8c61\u548clocation\u3002\u4e0d\u80fd\u64cd\u4f5cDOM\u5bf9\u8c61<\/p>\n
 <\/p>\n
4\uff0c\u65b9\u6cd5\u9650\u5236
\nWorker \u7ebf\u7a0b\u4e0d\u80fd\u6267\u884calert()\u65b9\u6cd5\u548cconfirm()\u65b9\u6cd5\uff0c\u4f46\u53ef\u4ee5\u4f7f\u7528 XMLHttpRequest \u5bf9\u8c61\u53d1\u51fa AJAX \u8bf7\u6c42\u3002<\/p>\n
5\uff0c\u6587\u4ef6\u9650\u5236<\/p>\n
Worker \u7ebf\u7a0b\u65e0\u6cd5\u8bfb\u53d6\u672c\u5730\u6587\u4ef6\uff0c\u5373\u4e0d\u80fd\u6253\u5f00\u672c\u673a\u7684\u6587\u4ef6\u7cfb\u7edf\uff08file:\/\/\uff09\uff0c\u5b83\u6240\u52a0\u8f7d\u7684\u811a\u672c\uff0c\u5fc5\u987b\u6765\u81ea\u7f51\u7edc\u3002<\/p>\n
 <\/p>\n
Worker \u5b50\u7ebf\u7a0b\u5185\u90e8\u52a0\u8f7d\u811a\u672c<\/span><\/p>\n
importScripts('script1.js', 'script2.js');<\/pre>\n
 <\/p>\n
\u4e3b\u7ebf\u7a0b\u76d1\u542cWorker\u62a5\u9519\u56de\u8c03<\/span><\/p>\n
worker.addEventListener('error', function (event) {\r\n \/\/ ...\r\n});<\/pre>\n
Worker \u5185\u90e8\u4e5f\u53ef\u4ee5\u76d1\u542cerror\u4e8b\u4ef6\u3002<\/p>\n
 <\/p>\n
http:\/\/www.ruanyifeng.com\/blog\/2018\/07\/web-worker.html<\/a><\/p>\n
\u5176\u4ed6\u6848\u4f8b\uff1ahttps:\/\/www.cnblogs.com\/peakleo\/p\/6218823.html<\/a><\/p>\n
 <\/p>\n
Web Worker\u517c\u5bb9ie10\u4ee5\u4e0a\u5305\u62ecie10\u00a0 \u00a0 js \u591a\u7ebf\u7a0b \u63a8\u8350\u5148\u770b\u5173\u4e8e\u8fdb\u7a0b\u548c\u7ebf\u7a0b\u7684\u5173\u7cfb\uff1ahttps […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6938","post","type-post","status-publish","format-standard","hentry","category-wordpress"],"_links":{"self":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts\/6938","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6938"}],"version-history":[{"count":0,"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts\/6938\/revisions"}],"wp:attachment":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6938"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6938"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6938"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}