{"id":12710,"date":"2023-11-28T23:04:12","date_gmt":"2023-11-28T15:04:12","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=12710"},"modified":"2023-11-29T21:59:55","modified_gmt":"2023-11-29T13:59:55","slug":"javascript-zhong-ru-he-li-jie-tong-bu-he-yi-bu","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/javascript-zhong-ru-he-li-jie-tong-bu-he-yi-bu\/","title":{"rendered":"JavaScript \u4e2d\u5982\u4f55\u7406\u89e3\u540c\u6b65\u548c\u5f02\u6b65\uff1f"},"content":{"rendered":"<p>\u5728 JavaScript \u4e2d\uff0c\u540c\u6b65\u548c\u5f02\u6b65\u6d89\u53ca\u4ee3\u7801\u7684\u6267\u884c\u987a\u5e8f\u548c\u4e8b\u4ef6\u5904\u7406\u65b9\u5f0f\u3002<\/p>\n<ol>\n<li><strong>\u540c\u6b65 (Synchronous)<\/strong>:<br \/>\n\u540c\u6b65\u4ee3\u7801\u6309\u7167\u4ece\u4e0a\u5230\u4e0b\u7684\u987a\u5e8f\u4f9d\u6b21\u6267\u884c\uff0c\u6bcf\u6bb5\u4ee3\u7801\u5fc5\u987b\u7b49\u5f85\u524d\u9762\u7684\u4ee3\u7801\u6267\u884c\u5b8c\u6210\u540e\u624d\u80fd\u6267\u884c\u3002\u8fd9\u610f\u5473\u7740\u5f53\u4e00\u4e2a\u540c\u6b65\u64cd\u4f5c\u6267\u884c\u65f6\uff0c\u7a0b\u5e8f\u4f1a\u7b49\u5f85\u5b83\u5b8c\u6210\u540e\u518d\u7ee7\u7eed\u6267\u884c\u4e0b\u4e00\u6b65\u64cd\u4f5c\u3002\u8fd9\u53ef\u80fd\u5bfc\u81f4\u963b\u585e\uff0c\u7279\u522b\u662f\u5728\u5904\u7406\u8017\u65f6\u64cd\u4f5c\u65f6\uff0c\u4f1a\u4f7f\u7a0b\u5e8f\u6682\u505c\u6216\u7b49\u5f85\uff0c\u76f4\u5230\u64cd\u4f5c\u5b8c\u6210\u624d\u80fd\u7ee7\u7eed\u3002<\/li>\n<\/ol>\n<pre><code class=\"language-javascript\">console.log('Start');\n\n\/\/ \u540c\u6b65\u64cd\u4f5c\nconsole.log('Middle');\n\n\/\/ \u66f4\u591a\u540c\u6b65\u64cd\u4f5c\nconsole.log('End');\n<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c<code>Start<\/code> \u5c06\u5728 <code>Middle<\/code> \u548c <code>End<\/code> \u4e4b\u524d\u6253\u5370\uff0c\u56e0\u4e3a\u5b83\u4eec\u662f\u540c\u6b65\u6267\u884c\u7684\u3002<\/p>\n<ol start=\"2\">\n<li><strong>\u5f02\u6b65 (Asynchronous)<\/strong>:<br \/>\n\u5f02\u6b65\u64cd\u4f5c\u5141\u8bb8\u7a0b\u5e8f\u6267\u884c\u5176\u4ed6\u4efb\u52a1\u800c\u65e0\u9700\u7b49\u5f85\u8017\u65f6\u64cd\u4f5c\u5b8c\u6210\u3002\u5728 JavaScript \u4e2d\uff0c\u5e38\u89c1\u7684\u5f02\u6b65\u64cd\u4f5c\u5305\u62ec\u7f51\u7edc\u8bf7\u6c42 (<code>fetch<\/code>)\u3001\u6587\u4ef6\u8bfb\u53d6\u3001\u5b9a\u65f6\u5668 (<code>setTimeout<\/code>, <code>setInterval<\/code>) \u7b49\u3002\u5f02\u6b65\u64cd\u4f5c\u901a\u5e38\u901a\u8fc7\u56de\u8c03\u51fd\u6570\u3001Promise \u6216 async\/await \u6765\u5904\u7406\u3002<\/li>\n<\/ol>\n<pre><code class=\"language-javascript\">console.log('Start');\n\n\/\/ \u5f02\u6b65\u64cd\u4f5c\nsetTimeout(function() {\n  console.log('Middle');\n}, 1000);\n\n\/\/ \u66f4\u591a\u540c\u6b65\u64cd\u4f5c\nconsole.log('End');\n<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c<code>Start<\/code> \u548c <code>End<\/code> \u5c06\u4f1a\u5728 <code>Middle<\/code> \u4e4b\u524d\u6253\u5370\u3002<code>setTimeout<\/code> \u662f\u4e00\u4e2a\u5f02\u6b65\u64cd\u4f5c\uff0c\u5b83\u5c06\u5728 1000 \u6beb\u79d2\u540e\u6267\u884c\u4f20\u5165\u7684\u56de\u8c03\u51fd\u6570\u3002<\/p>\n<p>\u5f02\u6b65\u64cd\u4f5c\u4f7f\u5f97\u7a0b\u5e8f\u53ef\u4ee5\u7ee7\u7eed\u6267\u884c\u5176\u4ed6\u4efb\u52a1\uff0c\u800c\u4e0d\u5fc5\u7b49\u5f85\u8017\u65f6\u64cd\u4f5c\u5b8c\u6210\u3002\u8fd9\u79cd\u7279\u6027\u5bf9\u4e8e\u5904\u7406\u7528\u6237\u4ea4\u4e92\u3001\u7f51\u7edc\u8bf7\u6c42\u548c I\/O \u64cd\u4f5c\u975e\u5e38\u6709\u7528\uff0c\u53ef\u4ee5\u63d0\u9ad8\u7a0b\u5e8f\u7684\u54cd\u5e94\u6027\u548c\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 JavaScript \u4e2d\uff0c\u540c\u6b65\u548c\u5f02\u6b65\u6d89\u53ca\u4ee3\u7801\u7684\u6267\u884c\u987a\u5e8f\u548c\u4e8b\u4ef6\u5904\u7406\u65b9\u5f0f\u3002 \u540c\u6b65 (Synchronous): [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[115],"tags":[],"class_list":["post-12710","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12710","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=12710"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12710\/revisions"}],"predecessor-version":[{"id":13528,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12710\/revisions\/13528"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=12710"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=12710"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=12710"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}