{"id":330362,"date":"2023-04-26T09:20:39","date_gmt":"2023-04-26T01:20:39","guid":{"rendered":"https:\/\/www.idc.net\/help\/330362\/"},"modified":"2023-04-26T09:20:39","modified_gmt":"2023-04-26T01:20:39","slug":"%e5%89%8d%e7%ab%af%e7%9b%91%e6%8e%a7%e4%b9%8b%e6%80%a7%e8%83%bd%e4%b8%8e%e5%bc%82%e5%b8%b8","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/330362\/","title":{"rendered":"\u524d\u7aef\u76d1\u63a7\u4e4b\u6027\u80fd\u4e0e\u5f02\u5e38"},"content":{"rendered":"<p style=\"text-align: justify\">\u4f5c\u8005\uff1a\u4eac\u4e1c\u7269\u6d41 \u674e\u83f2\u83f2<\/p>\n<p style=\"text-align: justify\"><\/p>\n<h2>1 \u524d\u8a00<\/h2>\n<p><span style=\"color: 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\u8bf7\u6c42\u8bfb\u53d6\u771f\u5b9e\u6587\u6863\u5f00\u59cb\u7684\u65f6\u95f4\uff08\u5b8c\u6210\u5efa\u7acb\u8fde\u63a5\uff09\uff0c\u5305\u62ec\u4ece\u672c\u5730\u8bfb\u53d6\u7f13\u5b58,\u8fde\u63a5\u9519\u8bef\u91cd\u8fde\u65f6\uff0c\u8fd9\u91cc\u663e\u793a\u7684\u4e5f\u662f\u65b0\u5efa\u7acb\u8fde\u63a5\u7684\u65f6\u95f4<\/span><\/li>\n<li><span style=\"color: #333333\">responseStart:HTTP \u5f00\u59cb\u63a5\u6536\u54cd\u5e94\u7684\u65f6\u95f4\uff08\u83b7\u53d6\u5230\u7b2c\u4e00\u4e2a\u5b57\u8282\uff09\uff0c\u5305\u62ec\u4ece\u672c\u5730\u8bfb\u53d6\u7f13\u5b58<\/span><\/li>\n<li><span style=\"color: #333333\">responseEnd:HTTP \u54cd\u5e94\u5168\u90e8\u63a5\u6536\u5b8c\u6210\u7684\u65f6\u95f4\uff08\u83b7\u53d6\u5230\u6700\u540e\u4e00\u4e2a\u5b57\u8282\uff09\uff0c\u5305\u62ec\u4ece\u672c\u5730\u8bfb\u53d6\u7f13\u5b58<\/span><\/li>\n<li><span style=\"color: #333333\">domLoading:\u5f00\u59cb\u89e3\u6790\u6e32\u67d3 DOM \u6811\u7684\u65f6\u95f4\uff0c\u6b64\u65f6 Document.readyState \u53d8\u4e3a loading\uff0c\u5e76\u5c06\u629b\u51fa readystatechange \u76f8\u5173\u4e8b\u4ef6<\/span><\/li>\n<li><span style=\"color: #333333\">domInteractive:\u5b8c\u6210\u89e3\u6790 DOM \u6811\u7684\u65f6\u95f4\uff0cDocument.readyState \u53d8\u4e3a interactive\uff0c\u5e76\u5c06\u629b\u51fa readystatechange \u76f8\u5173\u4e8b\u4ef6<\/span><\/li>\n<li><span style=\"color: #333333\">domContentLoadedEventStart:DOM \u89e3\u6790\u5b8c\u6210\u540e\uff0c\u7f51\u9875\u5185\u8d44\u6e90\u52a0\u8f7d\u5f00\u59cb\u7684\u65f6\u95f4,\u6587\u6863\u53d1\u751f DOMContentLoaded\u4e8b\u4ef6\u7684\u65f6\u95f4<\/span><\/li>\n<li><span style=\"color: #333333\">domContentLoadedEventEnd:DOM \u89e3\u6790\u5b8c\u6210\u540e\uff0c\u7f51\u9875\u5185\u8d44\u6e90\u52a0\u8f7d\u5b8c\u6210\u7684\u65f6\u95f4\uff08\u5982 JS \u811a\u672c\u52a0\u8f7d\u6267\u884c\u5b8c\u6bd5\uff09\uff0c\u6587\u6863\u7684DOMContentLoaded \u4e8b\u4ef6\u7684\u7ed3\u675f\u65f6\u95f4<\/span><\/li>\n<li><span style=\"color: #333333\">domComplete:DOM \u6811\u89e3\u6790\u5b8c\u6210\uff0c\u4e14\u8d44\u6e90\u4e5f\u51c6\u5907\u5c31\u7eea\u7684\u65f6\u95f4\uff0cDocument.readyState \u53d8\u4e3a complete\uff0c\u5e76\u5c06\u629b\u51fa readystatechange \u76f8\u5173\u4e8b\u4ef6<\/span><\/li>\n<li><span style=\"color: #333333\">loadEventStart:load \u4e8b\u4ef6\u53d1\u9001\u7ed9\u6587\u6863\uff0c\u4e5f\u5373 load \u56de\u8c03\u51fd\u6570\u5f00\u59cb\u6267\u884c\u7684\u65f6\u95f4,\u5982\u679c\u6ca1\u6709\u7ed1\u5b9a load \u4e8b\u4ef6\uff0c\u503c\u4e3a 0<\/span><\/li>\n<li><span style=\"color: #333333\">loadEventEnd:load \u4e8b\u4ef6\u7684\u56de\u8c03\u51fd\u6570\u6267\u884c\u5b8c\u6bd5\u7684\u65f6\u95f4,\u5982\u679c\u6ca1\u6709\u7ed1\u5b9a load \u4e8b\u4ef6\uff0c\u503c\u4e3a 0<\/span><\/li>\n<\/ul>\n<h3>3.3 \u5404\u9636\u6bb5\u6027\u80fd\u7684\u8ba1\u7b97\uff08\u81ea\u5b9a\u4e49\uff09<\/h3>\n<pre>const { timing, navigation } = window.performance<br>const loadPageInfo = {};<br><br>\/\/ \u9875\u9762\u52a0\u8f7d\u7c7b\u578b\uff0c\u533a\u5206\u7b2c\u4e00\u6b21load\u8fd8\u662freload, 0\u521d\u6b21\u52a0\u8f7d\u30011\u91cd\u52a0\u8f7d<br>loadPageInfo.loadType = navigation.type;<br><br>\/\/ \u9875\u9762\u52a0\u8f7d\u5b8c\u6210\u7684\u65f6\u95f4 - \u51e0\u4e4e\u4ee3\u8868\u4e86\u7528\u6237\u7b49\u5f85\u9875\u9762\u767d\u5c4f\u7684\u65f6\u95f4<br>loadPageInfo.loadPage = timing.loadEventEnd - timing.navigationStart;<br><br>\/\/ \u91cd\u5b9a\u5411\u7684\u65f6\u95f4<br>loadPageInfo.redirect = timing.redirectEnd - timing.redirectStart;<br><br>\/\/ \u5378\u8f7d\u9875\u9762\u7684\u65f6\u95f4<br>loadPageInfo.unloadEvent = timing.unloadEventEnd - timing.unloadEventStart;<br><br>\/\/ \u67e5\u8be2 DNS \u672c\u5730\u7f13\u5b58\u7684\u65f6\u95f4<br>loadPageInfo.appCache = timing.domainLookupStart - timing.fetchStart;<br><br>\/\/ \u3010\u91cd\u8981\u3011DNS \u67e5\u8be2\u65f6\u95f4<br>\/\/ \u9875\u9762\u5185\u662f\u4e0d\u662f\u4f7f\u7528\u4e86\u592a\u591a\u4e0d\u540c\u7684\u57df\u540d\uff0c\u5bfc\u81f4\u57df\u540d\u67e5\u8be2\u7684\u65f6\u95f4\u592a\u957f\uff1f\u63a8\u8350 DNS \u9884\u52a0\u8f7d\u3002<br>\/\/ \u53ef\u4f7f\u7528 HTML5 Prefetch \u9884\u67e5\u8be2 DNS<br>loadPageInfo.lookupDomain = timing.domainLookupEnd - timing.domainLookupStart;<br><br>\/\/ HTTP\uff08TCP\uff09\u5efa\u7acb\u8fde\u63a5\u5b8c\u6210\u63e1\u624b\u7684\u65f6\u95f4<br>loadPageInfo.connect = timing.connectEnd - timing.connectStart;<br><br>\/\/ \u3010\u91cd\u8981\u3011HTTP\u8bf7\u6c42\u53ca\u83b7\u53d6 \u6587\u6863\u5185\u5bb9\u7684\u65f6\u95f4<br>loadPageInfo.request = timing.responseEnd - timing.responseStart;<br><br>\/\/ \u3010\u91cd\u8981\u3011\u524d\u4e00\u4e2a\u9875\u9762 unload \u5230 HTTP\u83b7\u53d6\u5230 \u9875\u9762\u7b2c\u4e00\u4e2a\u5b57\u8282\u7684\u65f6\u95f4<br>\/\/ \u3010\u539f\u56e0\u3011\u8fd9\u53ef\u4ee5\u7406\u89e3\u4e3a\u7528\u6237\u62ff\u5230\u4f60\u7684\u8d44\u6e90\u5360\u7528\u7684\u65f6\u95f4\uff0c\u63a8\u8350 \u52a0\u5f02\u5730\u673a\u623f\uff0c\u52a0 CDN \u5904\u7406\uff0c\u52a0\u5bbd\u5e26\uff0c\u52a0 CPU \u8fd0\u7b97\u901f\u5ea6<br>\/\/ TTFB \u5373 Time To First Byte<br>loadPageInfo.ttfb = timing.responseStart - timing.navigationStart;<br><br>\/\/ \u89e3\u6790 DOM \u6811\u7ed3\u6784\u7684\u65f6\u95f4<br>loadPageInfo.domReady = timing.domComplete - timing.responseEnd;<br><br>\/\/ \u3010\u91cd\u8981\u3011\u6267\u884c onload \u56de\u8c03\u51fd\u6570\u7684\u65f6\u95f4<br>\/\/ \u3010\u539f\u56e0\u3011\u662f\u5426\u592a\u591a\u4e0d\u5fc5\u8981\u7684\u64cd\u4f5c\u90fd\u653e\u5728 onload \u56de\u8c03\u51fd\u6570\u91cc\u6267\u884c\u4e86\uff0c\u63a8\u8350 \u5ef6\u8fdf\u52a0\u8f7d\u3001\u6309\u9700\u52a0\u8f7d\u7684\u7b56\u7565<br>loadPageInfo.loadEvent = timing.loadEventEnd - timing.loadE<\/pre>\n<h2>4 \u5f02\u5e38\u76d1\u63a7<\/h2>\n<p><span style=\"color: #333333\">\u524d\u7aef\u9700\u8981\u76d1\u63a7\u7684\u9519\u8bef\u4e3b\u8981\u6709\u4e24\u7c7b\uff1a<\/span><\/p>\n<ol>\n<li><span style=\"color: #333333\">Javascript\u9519\u8bef\uff08js\u9519\u8bef\u3001promise\u9519\u8bef\uff09<\/span><\/li>\n<li><span style=\"color: #333333\">\u76d1\u542cerror\u9519\u8bef\uff08\u8d44\u6e90\u52a0\u8f7d\u9519\u8bef\uff09<\/span><\/li>\n<\/ol>\n<h3>4.1 console.error<\/h3>\n<pre>\/\/ \u91cd\u5199console.error\uff0c\u53ef\u4ee5\u6355\u83b7\u66f4\u5168\u9762\u7684\u62a5\u9519\u4fe1\u606f<br>var oldError = console.error;<br><br><br>console.error = function(tempErrorMsg){<br>    var errorMsg = ( arguments[0] &amp;&amp; arguments[0].message ) || tempErrorMsg;<br>    var lineNumber = 0;<br>    var columnNumber = 0;<br>    var errorStack = arguments[0] &amp;&amp; arguments[0].stack;<br><br><br>    if( !errorStack ){<br>        saveJSError( 'console_error', errorMsg, '', lineNumber, columnNumber, 'CustomizeError: ' + errorMsg );<br>    }else{<br>        saveJSError( 'console_error', errorMsg, '', lineNumber, columnNumber, errorStack );<br>    }<br><br><br>    return oldError.apply( console, arguments );<\/pre>\n<h3>4.2 error\u4e8b\u4ef6<\/h3>\n<p><span style=\"color: #333333\">\u901a\u8fc7\u5bf9error\u4e8b\u4ef6\u7684\u76d1\u542c\uff0c\u53ef\u4ee5\u6355\u6349\u5230 js\u8bed\u6cd5 \u53ca \u8d44\u6e90\u52a0\u8f7d \u7684\u9519\u8bef\u3002\u6839\u636e event.target.src \/ href \u6765\u5224\u65ad\u662f\u5426\u4e3a\u8d44\u6e90\u52a0\u8f7d\u9519\u8bef\u3002<\/span><\/p>\n<pre>window.addEventListener( 'error', function(e){<br>    var errorMsg = e.error &amp;&amp; e.error.message,<br>        errorStack = e.error &amp;&amp; e.error.stack,<br>        pageUrl = e.filename,<br>        lineNumber = e.lineno,<br>        columnNumber = e.colno;<br><br><br>    saveJSError( 'on_error', errorMsg, pageUrl, lineNumber, columnNumber, errorStack );<br>} );<\/pre>\n<h3>4.3 Promise<\/h3>\n<pre>\/\/ \u6355\u83b7\u672a\u5904\u7406\u7684Promise\u9519\u8bef<br>window.onunhandledrejection = function(e){<br>    var errorMsg = '';<br>    var errorStack = '';<br>    if( typeof e.reason === 'object' ){<br>        errorMsg = e.reason.message;<br>        errorStack = e.reason.stack;<br>    }else{<br>        errorMsg = e.reason;<br>        errorStack = '';<br>    }<br>    saveJSError( 'on_error', errorMsg, '', 0, 0, 'UncaughtInPromiseError: ' + errorStack );<br>}<\/pre>\n<h2>5 \u603b\u7ed3<\/h2>\n<p><span style=\"color: #333333\">\u4ee5\u4e0a\uff0c\u901a\u8fc7\u7b80\u5355\u7684js\u4ee3\u7801\uff0c\u5373\u53ef\u5b9e\u73b0\u5bf9\u9875\u9762\u6027\u80fd\u4e0e\u5f02\u5e38\u7684\u76d1\u63a7\u4e0e\u6570\u636e\u4e0a\u62a5\uff0c\u540e\u7eed\u8fd8\u9700\u8981\u76f8\u5e94\u5177\u4f53\u7684\u5e73\u53f0\u6c47\u603b\uff0c\u53ca\u76f8\u5e94\u7684\u4e1a\u52a1\u6240\u9700\u6570\u636e\uff08\u5982PV\u3001UV\u7b49\uff09\u7684\u8ba1\u7b97\uff0c\u624d\u80fd\u771f\u6b63\u5b9e\u73b0\u5bf9\u4ea7\u54c1\u7684\u9875\u9762\u6570\u636e\u5448\u73b0\uff0c\u7528\u4e8e\u4e1a\u52a1\u6269\u5c55\u53ca\u5ba3\u5bfc\u3002<\/span><\/p>\n<h2>6 \u540e\u7eed<\/h2>\n<p><span style=\"color: #333333\">\u4e0a\u8ff0\u4ee3\u7801\uff0c\u5b9e\u73b0\u4e86\u5bf9\u9875\u9762\u6027\u80fd\u53ca\u5f02\u5e38\u7684\u76d1\u63a7\uff0c\u4f46\u5176\u5b9e\u524d\u7aef\u7684\u76d1\u63a7\u8fd8\u5305\u62ec\u4e86\u8bf7\u6c42\u63a5\u53e3\u7684\u76d1\u63a7\u4e0e\u57cb\u70b9\u7684\u5b9e\u73b0\uff0c\u540e\u7eed\u5c06\u9646\u7eed\u63a8\u51fa\uff0c\u656c\u8bf7\u671f\u5f85\u3002<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f5c\u8005\uff1a\u4eac\u4e1c\u7269\u6d41 \u674e\u83f2\u83f2 1 \u524d\u8a00 \u73b0\u6709\u7684\u5927\u90e8\u5206\u76d1\u63a7\u65b9\u6848\u90fd\u662f\u9488\u5bf9\u670d\u52a1\u7aef\u7684\uff0c\u800c\u9488\u5bf9\u524d\u7aef\u7684\u76d1\u63a7\u5f88\u5c11\uff0c\u8bf8\u5982\u7ebf\u4e0a\u9875\u9762\u7684\u767d [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":330363,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[61],"tags":[],"class_list":["post-330362","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-website"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/330362","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=330362"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/330362\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media\/330363"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=330362"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=330362"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=330362"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}