{"id":10204,"date":"2021-11-24T00:56:24","date_gmt":"2021-11-23T16:56:24","guid":{"rendered":"https:\/\/www.zhangxinxu.com\/wordpress\/?p=10204"},"modified":"2022-04-19T20:18:53","modified_gmt":"2022-04-19T12:18:53","slug":"js-visibilitychange-pagehide-lifecycle","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2021\/11\/js-visibilitychange-pagehide-lifecycle\/","title":{"rendered":"\u6df1\u5ea6\u597d\u6587: \u4ecejs visibilitychange Safari\u4e0b\u65e0\u6548\u8bf4\u5f00\u53bb"},"content":{"rendered":"<p>by <a href=\"https:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=10204\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=10204<\/a> \u946b\u7a7a\u95f4-\u946b\u751f\u6d3b<br \/>\n\u672c\u6587\u6b22\u8fce\u5206\u4eab\uff0c\u6b22\u8fce\u8f6c\u53d1\uff0c\u6b22\u8fce\u805a\u5408\uff0c\u5168\u6587\u8f6c\u8f7d\u8bf7\u8054\u7cfb\u6388\u6743\u3002<\/p>\n<p><script>window.wxShareImgUrl = 'https:\/\/www.zhangxinxu.com\/study\/image\/share\/202111-lifecycle.png';if(!\/zhangxinxu\/.test(location.host)){document.body.addEventListener('mousedown',function(){location.href='https:\/\/www.zhangxinxu.com\/wordpress\/?p=10204'});}<\/script><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202111\/lifecycle-cover.png\" width=\"146\" height=\"106\" alt=\"\u5360\u4f4d\u56fe\" class=\"alignleft size-medium mr10\" \/><\/p>\n<p>\u5173\u4e8e visibilitychange \u4e8b\u4ef6\uff0c\u5728 2012 \u5e74\u7684\u65f6\u5019\u6211\u5c31\u64b0\u6587\u4ecb\u7ecd\u8fc7\u4e86\uff0c\u8be6\u89c1\u201c<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/2012\/11\/page-visibility-api-introduction-extend\/\">Page Visibility(\u9875\u9762\u53ef\u89c1\u6027) API\u4ecb\u7ecd\u3001\u5fae\u62d3\u5c55<\/a>\u201d\uff0c\u662f\u4e00\u4e2a\u975e\u5e38\u6709\u5386\u53f2\u7684 Web \u7279\u6027\uff0c\u4e0d\u8fc7\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u7531\u4e8e\u6d4f\u89c8\u5668\u5b9e\u73b0\u7684\u7ec6\u8282\u5dee\u5f02\uff0cPage Visibility API \u5e76\u4e0d\u603b\u662f\u80fd\u591f\u6ee1\u8db3\u5b9e\u9645\u7684\u751f\u6210\u9700\u6c42\uff0c\u8fd9\u662f\u600e\u4e48\u56de\u4e8b\u5462\uff1f<\/p>\n<p>\u672c\u6587\u5c31\u4f1a\u4ece visibilitychange \u4e8b\u4ef6\u89e6\u53d1\uff0c\u5e26\u5927\u5bb6\u6df1\u5165\u4e86\u89e3\u4e0b Web \u9875\u9762\u7684\u751f\u547d\u5468\u671f\u8fc7\u7a0b\u3002<\/p>\n<h3>\u4e00\u3001Safari\u4e0b\u95ee\u9898\u8bf4\u660e<\/h3>\n<p>\u5728 Safari \u6d4f\u89c8\u5668\u4e0b\uff0c\u65e0\u8bba\u662f\u684c\u9762\u7aef Safari\uff0c\u8fd8\u662f iOS Safari\uff0cvisibilitychange \u4e8b\u4ef6\u4e0d\u603b\u662f\u89e6\u53d1\u7684\u3002<\/p>\n<p>\u5bf9\u4e8e\u7a97\u53e3\u6700\u5c0f\u5316\uff0cTab \u9690\u85cf\u7b49\u884c\u4e3a visibilitychange \u4e8b\u4ef6\u662f\u6b63\u5e38\u7684\uff0c\u4f46\u662f\u5982\u679c\u662f\u70b9\u51fb\u9875\u9762\u67d0\u4e2a\u94fe\u63a5\u53d1\u751f\u7684\u5f53\u524d\u9875\u5bfc\u822a\u8df3\u8f6c\uff0c\u5219 visibilitychange \u4e8b\u4ef6\u4e0d\u4f1a\u89e6\u53d1\u3002<\/p>\n<p>\u6240\u4ee5\uff0c\u867d\u7136 visibilitychange \u770b\u8d77\u6765\u517c\u5bb9\u6027\u4e0d\u9519\uff0cIE10+\u652f\u6301\uff0c\u4f46\u662f\u5b9e\u9645\u4f7f\u7528\u7684\u65f6\u5019\u8fd8\u662f\u6709\u4e00\u4e9b\u95ee\u9898\u7684\uff0c\u4e0a\u8ff0\u95ee\u9898\u5728 caniuse \u4e0a\u4e5f\u662f\u6709\u5bf9\u5e94\u7684\u63cf\u8ff0\u7684\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202111\/2021-11-23_133625.png\" width=\"652\" height=\"424\" alt=\"visibilitychange \u4e0e Safari\"><\/p>\n<p>\u8fd9\u5c31\u4f1a\u7ed9\u6211\u4eec\u7684\u4e1a\u52a1\u5f00\u53d1\u5e26\u6765\u56f0\u6270\uff0c\u4f8b\u5982\uff0c\u6709\u4e00\u4e2a\u6570\u636e\u4e0a\u62a5\u7684\u9700\u6c42\uff0c\u5e0c\u671b\u7528\u6237\u4e0d\u518d\u8bbf\u95ee\u6b64\u9875\u9762\u7684\u65f6\u5019\uff0c\u8fdb\u884c\u4e00\u6b21\u6570\u636e\u4e0a\u62a5\uff0c\u5219\u5982\u679c\u4f7f\u7528 visibilitychange \u4e8b\u4ef6\u8fdb\u884c\u5904\u7406\uff0cSafari \u6d4f\u89c8\u5668\u4e0b\u5c31\u4f1a\u6709\u6570\u636e\u5f02\u5e38\u7684\u60c5\u51b5\u53d1\u751f\u3002<\/p>\n<pre>document.addEventListener('visibilitychange', function logData() {\r\n  if (document.visibilityState === 'hidden') {\r\n    navigator.sendBeacon('\/log', { \/* \u8981\u53d1\u9001\u7684\u6570\u636e *\/ });\r\n  }\r\n});<\/pre>\n<p>\u90a3\u6709\u6ca1\u6709\u4ec0\u4e48\u529e\u6cd5\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u5462\uff1f<\/p>\n<p>\u90a3\u5c31\u662f\u4f7f\u7528 pagehide \u4e8b\u4ef6\u3002<\/p>\n<h3>\u4e8c\u3001\u548cpageshow\/pagehide\u7684\u533a\u522b<\/h3>\n<h4>1. \u529f\u80fd\u533a\u522b<\/h4>\n<p>\u867d\u7136\u90fd\u662f\u6709\u663e\u793a\u4e0e\u9690\u85cf\u7684\u542b\u4e49\uff0c\u4f46\u662f visibilitychange \u6307\u7684\u662f\u9875\u9762\u7684\u53ef\u89c1\u4e0e\u4e0d\u53ef\u89c1\uff0cpageshow\/pagehide \u6307\u7684\u662f\u9875\u9762\u7684\u8fdb\u5165\u4e0e\u79bb\u5f00\u3002<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e0b\u9762\u4e00\u6bb5\u6d4b\u8bd5\u4ee3\u7801\u4e86\u89e3\u4e24\u8005\u529f\u80fd\u4e0a\u7684\u533a\u522b\uff1a<\/p>\n<pre>&lt;div id=\"result\"&gt;&lt;\/div&gt;<\/pre>\n<pre>log = function (content) {\r\n    result.innerHTML += content + '&lt;br&gt;';\r\n};\r\n\r\nwindow.addEventListener('pageshow', function () {\r\n    log('pageshow: \u9875\u9762\u663e\u793a');\r\n});\r\nwindow.addEventListener('pagehide', function () {\r\n    log('pagehide: \u9875\u9762\u9690\u85cf');\r\n});\r\n\r\ndocument.addEventListener('visibilitychange', function () {\r\n    if (document.hidden) {\r\n        log('visibilitychange: \u9875\u9762\u9690\u85cf');\r\n    } else {\r\n        log('visibilitychange: \u9875\u9762\u663e\u793a');\r\n    }\r\n});<\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202111\/page-toggle2.gif\" width=\"468\" height=\"287\" alt=\"\u9875\u9762\u663e\u793a\u4e0e\u9690\u85cf\u4e8b\u4ef6\u6d4b\u8bd5\u7ed3\u679c\u5f55\u5c4f\" style=\"border: 1px solid #ddd;\"><\/p>\n<p>\u5177\u4f53\u63cf\u8ff0\u4e3a\uff1a<\/p>\n<ul>\n<li>\u9875\u9762\u8fdb\u5165\uff0c\u5305\u62ec\u5237\u65b0\u4f1a\u89e6\u53d1 pageshow\uff1b<\/li>\n<li>\u9009\u9879\u5361\u5207\u6362\uff0c\u53ea\u4f1a\u89e6\u53d1 visibilitychange \u663e\u793a\u4e0e\u9690\u85cf\uff1b <\/li>\n<li>\u524d\u8fdb\u548c\u540e\u9000\uff0c\u6240\u6709\u6d4f\u89c8\u5668\u90fd\u4f1a\u4f9d\u6b21\u89e6\u53d1 pagehide\uff0cvisibilitychange \u548c pageshow\uff1b<\/li>\n<li>\u5982\u679c\u662f\u70b9\u51fb\u67d0\u4e2a\u94fe\u63a5\u8df3\u8f6c\u51fa\u53bb\uff0c\u5219Safari\u6d4f\u89c8\u5668\u4f1a\u51fa\u73b0\u4e0d\u4e00\u6837\u7684\u8868\u73b0\u3002<\/li>\n<\/ul>\n<p>\u5927\u5bb6\u82e5\u6709\u5174\u8da3\uff0c\u53ef\u4ee5<a href=\"https:\/\/www.zhangxinxu.com\/study\/202111\/page-toggle.html\" class=\"a_link\" target=\"_zxx\">\u8bbf\u95ee\u8fd9\u91cc<\/a>\u611f\u53d7\u4e0b\u4e8b\u4ef6\u53d8\u5316\u7684\u89e6\u53d1\u3002\u5176\u5b9e\u4e0a\u9762\u7684\u7b2c 4 \u70b9\u5927\u5bb6\u53ef\u4ee5\u5728 Safari \u6d4f\u89c8\u5668\u4e0b\u6d4b\u8bd5\u4e0b\uff0c\u70b9\u51fb\u9875\u9762\u94fe\u63a5\u7136\u540e\u518d\u8fd4\u56de\uff0c\u4f1a\u53d1\u73b0 visibilitychange \u4e8b\u4ef6\u5e76\u672a\u6267\u884c\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202111\/safari-visibilitychange-not.png\" width=\"360\" height=\"170\" alt=\"safari visibilitychange\u672a\u6267\u884c\u793a\u610f\u56fe\" style=\"border: 1px solid #ddd;\"><\/p>\n<h4>2. \u7528\u6cd5\u533a\u522b<\/h4>\n<p><code>'visibilitychange'<\/code> \u4e8b\u4ef6\u901a\u5e38\u90fd\u662f\u6302\u8f7d\u5728 document \u5bf9\u8c61\u4e0a\uff0c\u867d\u7136\u73b0\u5728\u6700\u65b0\u7684\u6d4f\u89c8\u5668\u4e5f\u652f\u6301\u6302\u8f7d\u5728 window \u5bf9\u8c61\u4e0a\uff0c\u4e0d\u8fc7\u7531\u4e8e  Safari 14 \u4e4b\u524d\u7684\u7248\u672c\u4e0d\u652f\u6301\uff0c\u56e0\u6b64\uff0c\u662f\u4e0d\u63a8\u8350\u4f7f\u7528\u4e0b\u9762\u7684\u8bed\u6cd5\u7684\uff1a<\/p>\n<pre>window.addEventListener('visibilitychange', () =&gt; {});<\/pre>\n<p>\u800c pageshow \u548c pagehide \u4e8b\u4ef6\u90fd\u662f\u901a\u8fc7 window \u5bf9\u8c61\u8fdb\u884c\u6ce8\u518c\u7684\u3002<\/p>\n<h4>3. \u517c\u5bb9\u6027\u533a\u522b<\/h4>\n<p>pageshow \u548c pagehide \u4e8b\u4ef6\u662f IE11 \u53ca\u5176\u4ee5\u4e0a\u6d4f\u89c8\u5668\u652f\u6301\u7684\uff0c\u800c visibilitychange \u4e8b\u4ef6\u662f IE10 \u53ca\u5176\u4ee5\u4e0a\u7248\u672c\u652f\u6301\u7684\u3002<\/p>\n<p>\u5177\u4f53\u5982\u4e0b\u622a\u56fe\u793a\u610f\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202111\/2021-11-23_155500.png\" width=\"634\" height=\"238\" alt=\"pageshow\u517c\u5bb9\u6027\"><\/p>\n<p>\u867d\u7136 pageshow \u548c pagehide \u7684\u517c\u5bb9\u6027\u7565\u900a\u4e00\u7b79\uff0c\u4f46\u662f\u4eba\u5bb6\u7a33\u5b9a\u554a\uff0c\u4ee5\u53ca\u653e\u773c\u6574\u4e2a\u4e16\u754c\uff0c\u4f7f\u7528 IE10 \u6d4f\u89c8\u5668\u7684\u7528\u6237\u5fae\u4e4e\u5176\u5fae\uff0c\u56e0\u4e3a IE10 \u5c31\u662f\u4e2a\u8fc7\u6e21\u7248\u672c\u3002<\/p>\n<h3>\u4e09\u3001unload \u548c beforeunload \u4e8b\u4ef6\u5462\uff1f<\/h3>\n<p>\u9664\u975e\u662f\u8981\u517c\u5bb9\u53e4\u8001\u7684 IE \u6d4f\u89c8\u5668\uff0c\u4ee5\u53ca\u5728\u684c\u9762\u7aef\u6d4f\u89c8\u5668\u73af\u5883\u4e0b\u963b\u6b62\u7528\u6237\u9000\u51fa\u7f51\u9875\uff08\u5982\uff0c\u60a8\u5199\u7684\u5185\u5bb9\u5c1a\u672a\u4fdd\u5b58\uff0c\u662f\u5426\u9000\u51fa\uff0c\u5982\u4e0b\u4ee3\u7801\u6240\u793a\uff09\uff0c\u5426\u5219\uff0c\u6ca1\u6709\u4efb\u4f55\u7406\u7531\u4f7f\u7528 unload \u548c beforeunload \u4e8b\u4ef6\uff0c\u5c24\u5176\u662f\u79fb\u52a8\u7aef\u7684\u9875\u9762\u3002<\/p>\n<pre>window.addEventListener('beforeunload', function (event) {\r\n  if (pageHasUnsavedChanges()) {\r\n    event.preventDefault();\r\n    return event.returnValue = '\u60a8\u5199\u7684\u5185\u5bb9\u5c1a\u672a\u4fdd\u5b58\uff0c\u662f\u5426\u9000\u51fa\uff1f';\r\n  }\r\n});<\/pre>\n<p>\u56e0\u4e3a\u7528\u6237\u8bbf\u95ee\u5b8c\u4e00\u4e2a\u9875\u9762\uff0c\u5f80\u5f80\u662f\u76f4\u63a5\u5207\u6362\u5230\u5176\u4ed6 APP\uff0c\u7136\u540e\u901a\u8fc7\u6740\u8fdb\u7a0b\u5173\u6389\u6574\u4e2a\u6d4f\u89c8\u5668 APP\uff0cunload \u4e8b\u4ef6\u5c31\u4e0d\u4f1a\u89e6\u53d1\u3002<\/p>\n<p>\u4ee5\u53ca\u53e6\u5916\u4e00\u4e2a\u6bd4\u8f83\u91cd\u8981\u7684\u539f\u56e0\uff0cunload \u548c beforeunload \u4f1a\u963b\u6b62\u6d4f\u89c8\u5668\u628a\u9875\u9762\u5b58\u5165\u7f13\u5b58\uff0c\u5f71\u54cd\u6d4f\u89c8\u5668\u524d\u8fdb\u548c\u540e\u9000\u65f6\u5019\u7684\u54cd\u5e94\u901f\u5ea6\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202111\/2021-11-23_164013.png\" width=\"633\" height=\"197\" alt=\"unload \u4e8b\u4ef6\u517c\u5bb9\u6027\"><\/p>\n<h3>\u56db\u3001\u75db\u5feb\u70b9\uff0c\u7ec8\u6781\u65b9\u6848\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u56de\u5230\u4e00\u5f00\u59cb\uff0c\u53ea\u662f\u8bf4\u4e86 pagehide \u89e3\u51b3 Safari \u7684\u95ee\u9898\uff0c\u53ef\u5177\u4f53\u8be5\u5982\u4f55\u89e3\u51b3\u5462\uff1f<\/p>\n<p>\u5f88\u7b80\u5355\uff0c\u5224\u65ad\u662f\u4e0d\u662f Safari \u6d4f\u89c8\u5668\uff0c\u7136\u540e\u989d\u5916\u589e\u52a0\u4e00\u4e2a pagehide \u4e8b\u4ef6\uff1a<\/p>\n<pre>document.addEventListener('visibilitychange', function logData() {\r\n    if (document.visibilityState === 'hidden') {\r\n      navigator.sendBeacon('\/log', postData );\r\n    }\r\n});\r\nif (\/^((?!chrome|android).)*safari\/i.test(navigator.userAgent)) {\r\n    window.addEventListener('pagehide', function () {\r\n        navigator.sendBeacon('\/log', postData );\r\n    });\r\n}<\/pre>\n<p>\u4f46\u662f\uff0c\u4e0a\u9762\u7684\u5b9e\u73b0\u5176\u5b9e\u662f\u6709\u98ce\u9669\u7684\uff0c\u56e0\u4e3a\u4f60\u5e76\u4e0d\u77e5\u9053\u54ea\u4e00\u5929 Safari \u6d4f\u89c8\u5668\u4f1a\u6539\u53d8\u81ea\u5df1\u7684\u7b56\u7565\uff0c\u4e5f\u5c31\u662f\u8bf4\u4e0d\u5b9a Safari 16 \u6216\u8005\u540e\u9762\u67d0\u4e00\u4e2a\u7248\u672c pagehide \u4e5f\u4f1a\u89e6\u53d1 visibilitychange \u884c\u4e3a\uff0c\u5219\u4e0a\u9762\u7684\u4ee3\u7801\u53c8\u4f1a\u6709\u91cd\u590d\u4e0a\u62a5\u7684\u95ee\u9898\u3002<\/p>\n<p>\u6240\u4ee5\uff0c\u6bd4\u8f83\u7a33\u59a5\uff0c\u4e14\u81ea\u5df1\u4e0d\u9700\u8981\u52a8\u8111\u5b50\u7684\u65b9\u6cd5\uff0c\u5c31\u662f\u62fe\u4eba\u7259\u6167\uff0c\u4f7f\u7528\u4ed6\u4eba\u5df2\u7ecf\u505a\u597d\u7684\u9879\u76ee\u8fdb\u884c\u5f00\u53d1\uff0c\u4f8b\u5982\u8c37\u6b4c\u5b9e\u9a8c\u5ba4\u5f00\u6e90\u7684\u8fd9\u4e2a\u540d\u4e3a PageLifecycle.js \u7684\u9879\u76ee\uff1a<a href=\"https:\/\/github.com\/GoogleChromeLabs\/page-lifecycle\" target=\"_github\" rel=\"nofollow noopener\">github.com\/GoogleChromeLabs\/page-lifecycle<\/a><\/p>\n<p>\u4f7f\u7528\u5982\u4e0b\uff1a<\/p>\n<pre>&lt;script src=\".\/lifecycle.es5.js\"&gt;&lt;\/script&gt;\r\n&lt;script&gt;\r\nlifecycle.addEventListener('statechange', function(event) {\r\n    console.log('\u72b6\u6001\u53d8\u5316\uff1a' + event.oldState + ' \u2192 ' + event.newState);\r\n});\r\n&lt;\/script&gt;<\/pre>\n<p>\u6b64\u65f6\uff0c\u5f53\u6211\u4eec\u5bfc\u822a\u8df3\u8f6c\u518d\u8fd4\u56de\uff0c\u5c31\u4f1a\u51fa\u73b0\u5982\u4e0b\u622a\u56fe\u6240\u793a\u7684\u8f93\u51fa\u6548\u679c\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202111\/2021-11-23_191310.png\" width=\"308\" height=\"228\" alt=\"lifecycle.js \u793a\u610f\"><\/p>\n<p>\u60a8\u4e5f\u53ef\u4ee5<a href=\"https:\/\/www.zhangxinxu.com\/study\/202111\/lifecycle.html\" class=\"a_link\" target=\"_zxx\">\u8bbf\u95ee\u8fd9\u91cc<\/a>\u4eb2\u81ea\u611f\u53d7\u4e0b\u8f93\u51fa\u7ed3\u679c\u3002<\/p>\n<p>Safari \u4e0b\u867d\u7136\u7ec6\u8282\u4e0a\u6709\u5dee\u5f02\uff0c\u4f46\u662f\u4ece passive \u2192 hidden \u8fd9\u4e2a\u72b6\u6001\u548c Chrome \u6d4f\u89c8\u5668\u662f\u4e00\u81f4\u7684\uff0c\u5982\u4e0b\u622a\u56fe\u6240\u793a\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202111\/safari-lifecycle.png\" width=\"336\" height=\"185\" alt=\"Safari \u4e0b\u7684\u751f\u547d\u5468\u671f\u72b6\u6001\u53d8\u5316\" style=\"border: 1px solid #ddd;\"><\/p>\n<p>\u6240\u4ee5\uff0c\u6211\u4eec\u5e0c\u671b\u9875\u9762\u79bb\u5f00\u65f6\u5019\u4e0a\u62a5\u6570\u636e\uff0c\u53ef\u4ee5\u8bd5\u8bd5\u4e0b\u9762\u7684\u4ee3\u7801\uff0c\u7406\u8bba\u4e0a\u5e94\u8be5\u662f\u6ca1\u95ee\u9898\u7684\uff1a<\/p>\n<pre>lifecycle.addEventListener('statechange', function(event) {\r\n    if (event.oldState == 'passive' && event.newState == 'hidden') {\r\n        navigator.sendBeacon('\/log', postData);\r\n    }\r\n});<\/pre>\n<p>\u4e0a\u8ff0\u622a\u56fe\u9664\u4e86 passive \u548c hidden \u8fd9\u4e86\u4e24\u4e2a\u72b6\u6001\uff0c\u8fd8\u51fa\u73b0\u4e86 active \u548c frozen\uff0c\u8fd9\u4e9b\u72b6\u6001\u90fd\u8868\u793a\u4ec0\u4e48\u610f\u601d\u5462\uff0c\u662f\u6d4f\u89c8\u5668\u539f\u672c\u5c31\u6709\u7684\uff0c\u8fd8\u662f PageLifecycle.js \u81ea\u5b9a\u4e49\u7684\u5462\uff1f<\/p>\n<p>\u90fd\u662f\u6d4f\u89c8\u5668\u90fd\u6709\u7684\uff0c\u5199\u5165\u89c4\u8303\u6807\u51c6\u7684\u72b6\u6001\uff0c\u90fd\u5c5e\u4e8e\u9875\u9762\u751f\u547d\u5468\u671f\u7684\u4e00\u90e8\u5206\u3002<\/p>\n<p><span class=\"hidden\">\/\/zxx: \u5982\u679c\u4f60\u770b\u5230\u8fd9\u6bb5\u6587\u5b57\uff0c\u8bf4\u660e\u4f60\u73b0\u5728\u8bbf\u95ee\u662f\u4e0d\u662f\u539f\u6587\u7ad9\u70b9\uff0c\u66f4\u597d\u7684\u9605\u8bfb\u4f53\u9a8c\u5728\u8fd9\u91cc\uff1ahttps:\/\/www.zhangxinxu.com\/wordpress\/?p=10204\uff08\u4f5c\u8005\u5f20\u946b\u65ed\uff09<\/span><\/p>\n<h3>\u4e94\u3001\u4e86\u89e3\u9875\u9762\u7684\u751f\u547d\u5468\u671f<\/h3>\n<p>\u5b8c\u6574\u7684\u9875\u9762\u751f\u547d\u5468\u671f\u72b6\u6001\u5305\u62ec\u8fd9\u4e9b\uff1a<\/p>\n<ul>\n<li>ACTIVE \u6fc0\u6d3b<\/li>\n<li>PASSIVE \u672a\u6fc0\u6d3b\uff08\u9875\u9762\u53ef\u4ee5\u770b\u5230\uff0c\u4f46\u7126\u70b9\u4e0d\u5728\u6b64\u9875\u9762\uff0c\u6253\u5f00\u5f00\u53d1\u8005\u5de5\u5177\u53ef\u4ee5\u89e6\u53d1\u6b64\u72b6\u6001\uff09<\/li>\n<li>HIDDEN \u9690\u85cf\uff0c\u6700\u5c0f\u5316\u3001\u6807\u7b7e\u9875\u5207\u6362\u90fd\u5c5e\u4e8e\u9690\u85cf<\/li>\n<li>FROZEN \u51bb\u7ed3<\/li>\n<li>TERMINATED \u7ed3\u675f \uff08\u9875\u9762\u88ab\u5173\u95ed\uff09<\/li>\n<li>DISCARDED \u5e9f\u5f03\uff08\u9875\u9762\u5185\u5bb9\u88ab\u6d4f\u89c8\u5668\u6e05\u7a7a\uff09<\/li>\n<\/ul>\n<p>\u5176\u4e2d\uff0c\u4ece HIDDEN \u72b6\u6001\u5230 FROZEN \u72b6\u6001\u4e4b\u95f4\u7684\u53d8\u5316\u662f\u6709\u65b0\u7684 API \u4e8b\u4ef6\u540d\u79f0\u68c0\u6d4b\u7684\uff0c\u5206\u522b\u662f resume \u4e8b\u4ef6\u548c freeze \u4e8b\u4ef6\uff0c\u4f7f\u7528\u793a\u610f\u5982\u4e0b\uff1a<\/p>\n<pre>document.addEventListener('freeze', (event) =&gt; {\r\n  \/\/ \u9875\u9762\u88ab\u51bb\u7ed3\r\n});\r\n\r\ndocument.addEventListener('resume', (event) =&gt; {\r\n  \/\/ \u9875\u9762\u89e3\u51bb\u4e86\r\n});<\/pre>\n<p>Web \u7f51\u9875\u5b8c\u6574\u7684\u751f\u547d\u5468\u671f\u6d41\u7a0b\u89c1\u4e0b\u9762\u7684\u9ad8\u6e05\u5927\u56fe\uff08\u770b\u4e0d\u6e05\u53ef\u53cc\u6307\u653e\u5927\uff0c\u6216\u70b9\u51fb\u5c0f\u56fe\u67e5\u770b\uff09\uff0c\u539f\u56fe\u662f\u82f1\u6587\u7684\uff0c\u6e90\u81ea google \u5b98\u65b9\u7684<a href=\"https:\/\/developers.google.com\/web\/updates\/2018\/07\/page-lifecycle-api\" target=\"_google\" rel=\"nofollow noopener\">\u8fd9\u7bc7\u6587\u7ae0<\/a>\uff0c\u81ea\u5df1\u91cd\u65b0\u7ffb\u8bd1\u4e86\u4e0b\uff0c\u65b9\u4fbf\u5927\u5bb6\u7684\u5b66\u4e60\u3002<\/p>\n<p><a href=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202111\/lifecycle-l.png\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202111\/lifecycle-m.png\" width=\"728\" height=\"523\" alt=\"\u9875\u9762\u58f0\u660e\u5468\u671f\u5b8c\u6574\u793a\u610f\u9ad8\u6e05\u5927\u56fe\"><\/a><\/p>\n<h4>DISCARDED \u5e9f\u5f03<\/h4>\n<p>\u5176\u4e2d\uff0c\u5e9f\u5f03\u72b6\u6001\u662f\u540e\u6765\u624d\u6709\u7684\uff0c\u539f\u672c\u662f\u6ca1\u6709\u7684\uff0c\u76ee\u7684\u662f\u4e3a\u4e86\u91ca\u653e\u4e0d\u5fc5\u8981\u7684\u5185\u5b58\u5f00\u9500\u3002<\/p>\n<p>\u5982\u679c\u7ecf\u5e38\u4f7f\u7528 Chrome \u6d4f\u89c8\u5668\uff0c\u5e94\u8be5\u90fd\u6709\u9047\u5230\u8fc7\u8fd9\u6837\u7684\u73b0\u8c61\uff0c\u5c31\u662f\u4e00\u4e2a\u5f88\u4e45\u6ca1\u6709\u8bbf\u95ee\u7684\u6807\u7b7e\u9875\u518d\u5207\u6362\u8fc7\u53bb\u7684\u65f6\u5019\uff0c\u9875\u9762\u4f1a\u91cd\u65b0\u52a0\u8f7d\u4e00\u904d\u3002<\/p>\n<p>\u4e4b\u6240\u4ee5\u4f1a\u52a0\u8f7d\uff0c\u662f\u56e0\u4e3a\u6d4f\u89c8\u5668\u4e3a\u4e86\u8282\u7ea6\u5185\u5b58\uff0c\u628a\u8fd9\u4e2a\u957f\u65f6\u95f4\u4e0d\u4f7f\u7528\u7684\u9875\u9762\u7ed9\u5e9f\u5f03\u4e86\uff0c\u6240\u6709\u9875\u9762\u7684\u5185\u5b58\u3001\u7f13\u5b58\u901a\u901a\u820d\u5f03\u3002<\/p>\n<p>\u6211\u4e2a\u4eba\u662f\u4e0d\u592a\u559c\u6b22\u8fd9\u6837\u7684\u5904\u7406\u7684\uff0c\u56e0\u4e3a\u6709\u4e9b\u9875\u9762\uff0c\u7279\u522b\u662f\u56fe\u7279\u522b\u591a\u7684\u5927\u578b\u7684\u6587\u6863\uff08\u5982 figma \u8bbe\u8ba1\u7a3f\uff09\uff0c\u6bcf\u6b21\u5207\u6362\u8fc7\u53bb\uff0c\u90fd\u8981\u91cd\u65b0 loading \u4e00\u6b21\uff0c\u5f88\u4e0d\u723d\u7684\u3002<\/p>\n<p>\u5173\u4e8e\u8fd9\u4e2a\uff0c\u53ef\u4ee5\u6240\u5570\u55e6\u4e24\u53e5\u3002<\/p>\n<p>\u539f\u672c IE \u65f6\u4ee3\uff0cChrome \u8fd8\u6ca1\u51fa\u73b0\u7684\u65f6\u5019\uff0c\u6d4f\u89c8\u5668\u7684\u6807\u7b7e\u9875\uff0c\u5982\u679c\u4f60\u5f00\u4e86\u591a\u4e2a\uff0c\u53ea\u8981 1 \u4e2a\u5d29\u6389\u4e86\uff0c\u6574\u4e2a\u6d4f\u89c8\u5668\u90fd\u4f1a\u5d29\u6e83\uff0c\u5176\u4ed6\u7684\u6807\u7b7e\u9875\u6570\u636e\u5c31\u4f1a\u4e22\u5931\u3002<\/p>\n<p>\u5f53\u7136 Chrome \u51fa\u6765\u7684\u65f6\u5019\uff0c\u5176\u4e2d\u5ba3\u4f20\u7684\u4e00\u4e2a\u4f18\u70b9\u5c31\u662f\u6bcf\u4e2a\u6807\u7b7e\u9875\u9762\u72ec\u7acb\uff0cA \u9875\u9762\u5d29\u6e83\u4e0d\u4f1a\u5f71\u54cd B \u9875\u9762\uff0c\u4f46\u662f\uff0c\u8fd9\u79cd\u4e0d\u5d29\u6e83\u7b56\u7565\u662f\u4ee5\u727a\u7272\u5185\u5b58\u4e3a\u4ee3\u4ef7\u7684\uff0c\u56e0\u6b64\uff0c\u90a3\u4e2a\u65f6\u5019\uff0c\u7ecf\u5e38\u6709\u7f51\u7edc\u56fe\u620f\u8c11 Chrome \u662f\u4e2a\u5185\u5b58\u602a\u517d\uff08\u4f8b\u5982\u4e0b\u9762\u8fd9\u4e2a GIF \u56fe &#8211; 1.05M \u70b9\u51fb\u64ad\u653e\uff09\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202111\/chrome-eat-ram-s.png\" width=\"180\" height=\"180\" alt=\"Chrome \u5185\u5b58\u602a\u517d\" onclick=\"this.src=this.src.replace('png', 'gif')\"><\/p>\n<p>\u800c\u73b0\u5728\u7684\u8fd9\u79cd\u51bb\u7ed3+\u5e9f\u5f03\u7684\u7b56\u7565\uff0c\u867d\u7136\u7701\u4e86\u5185\u5b58\uff0c\u4f46\u662f\u727a\u7272\u4e86\u7528\u6237\u4f53\u9a8c\uff0c\u6b63\u6240\u8c13\u9c7c\u548c\u718a\u638c\u4e0d\u53ef\u517c\u5f97\uff0c\u6240\u4ee5\u7ec8\u6781\u89e3\u51b3\u65b9\u6cd5\u8fd8\u662f\u52a0\u5927\u5185\u5b58\uff0c16G\u5185\u5b58\u8d70\u8d77\u3002<\/p>\n<p>\u5728 Chrome 68 \u4e4b\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 <code>document.wasDiscarded<\/code> \u5224\u65ad\u9875\u9762\u662f\u4e0d\u662f\u5904\u4e8e\u5e9f\u6b62\u72b6\u6001\u3002<\/p>\n<p>\u4ee5\u53ca\uff0c\u4e5f\u53ef\u4ee5\u5728 Chrome \u6d4f\u89c8\u5668\u5730\u5740\u680f\u4e2d\u8f93\u5165 <a href=\"chrome:\/\/discards\" target=\"_google\">chrome:\/\/discards<\/a> \u67e5\u770b\u5404\u4e2a\u9875\u9762\u7684\u72b6\u6001\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u6211\u73b0\u5728\u770b\u4e86\u4e0b\uff08\u7701\u7565\u4e2d\u95f4\u5341\u51e0\u4e2a\u5927\u540c\u5c0f\u5f02\uff09\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202111\/2021-11-18_154849.png\" width=\"710\" height=\"681\" alt=\"\u6807\u7b7e\u9875\u72b6\u6001\u67e5\u770b\"><\/p>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u9664\u4e86\u51e0\u4e2a\u65b0\u6253\u5f00\u4e0d\u4e45\u7684\u9875\u9762\uff0c\u5176\u4ed6\u9875\u9762\u90fd\u5df2\u7ecf DISCARDED \u6389\u4e86\uff0c\u60e8\uff01<\/p>\n<p>\u4e0d\u8bf4\u4e86\uff0c\u6211\u8981\u53bb\u627e\u8fd0\u7ef4\u7533\u8bf7\u52a0\u5185\u5b58\u6761\u4e86\u3002<\/p>\n<h3>\u516d\u3001\u4f8b\u884c\u7684\u7ed3\u5c3e\u5185\u5bb9<\/h3>\n<p>\u597d\uff0c\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\uff0c\u5982\u679c\u6587\u4e2d\u6709\u8868\u8ff0\u4e0d\u51c6\u786e\u7684\u5730\u65b9\uff0c\u6b22\u8fce\u6307\u6b63\u3002<\/p>\n<p>\u98ce\u8427\u8427\u516e\u6613\u6c34\u5bd2\uff0c\u5199\u4f5c\u5934\u53d1\u516e\u4e0d\u590d\u8fd8\uff0c\u8fd9\u53e5\u8bd7\u5145\u5206\u8868\u73b0\u4e86\u5199\u4f5c\u7684\u4e0d\u6613\u4e0e\u8f9b\u82e6\uff0c\u8fde\u5934\u53d1\u90fd\u6389\u6ca1\u4e86\uff0c\u6240\u4ee5\uff0c\u6c42\u5206\u4eab\uff0c\u6c42\u8f6c\u53d1\u3002<\/p>\n<h4>\u53c2\u8003\u6587\u7ae0<\/h4>\n<ul>\n<li><a href=\"https:\/\/developers.google.com\/web\/updates\/2018\/07\/page-lifecycle-api\" target=\"_google\" rel=\"nofollow noopener\">Page Lifecycle API<\/a>\uff0c\u6b64\u6587\u6398\u91d1\u6709<a href=\"https:\/\/juejin.cn\/post\/6844904133321818119\" target=\"_juejin\" rel=\"nofollow noopener\">\u5bf9\u5e94\u4e2d\u6587\u7248<\/a>\u3002<\/li>\n<li><a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/API\/Document\/visibilitychange_event\" target=\"_mdn\" rel=\"nofollow noopener\">Document: visibilitychange event<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/GoogleChromeLabs\/page-lifecycle\" target=\"_github\" rel=\"nofollow noopener\">GoogleChromeLabs\/page-lifecycle<\/a><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/emtion\/emoji\/1f60e.svg\" width=\"20\" height=\"20\" align=\"absmiddle\"><\/p>\n<p>\u672c\u6587\u4e3a\u539f\u521b\u6587\u7ae0\uff0c\u6b22\u8fce\u5206\u4eab\uff0c\u52ff\u5168\u6587\u8f6c\u8f7d\uff0c\u5982\u679c\u5b9e\u5728\u559c\u6b22\uff0c\u53ef\u6536\u85cf\uff0c\u6c38\u4e0d\u8fc7\u671f\uff0c\u4e14\u4f1a\u53ca\u65f6\u66f4\u65b0\u77e5\u8bc6\u70b9\u53ca\u4fee\u6b63\u9519\u8bef\uff0c\u9605\u8bfb\u4f53\u9a8c\u4e5f\u66f4\u597d\u3002<br \/>\n\u672c\u6587\u5730\u5740\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=10204\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=10204<\/a><\/p>\n<p>\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202111\/lifecycle-cover.png\" width=\"146\" height=\"106\" alt=\"\u5360\u4f4d\u56fe\" class=\"alignright size-medium\" loading=\"lazy\" \/><\/p>\n<p>\u672c\u6587\u6807\u9898\u867d\u7136\u662f visibilitychange\uff0c\u4f46\u5b9e\u9645\u4e0a\u8bb2\u7684\u662f\u5305\u62ec pagehide, unload, beforeunload \u7b49\u4e8b\u4ef6\u5728\u5185\u7684Web\u9875\u9762\u751f\u547d\u5468\u671f\u77e5\u8bc6\uff0c\u5e0c\u671b\u672c\u6587\u7684\u6574\u7406\u53ef\u4ee5\u5e2e\u5230\u5927\u5bb6\u7684\u5b66\u4e60\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1284],"tags":[1800,1651,857,832,1799,1798,1782,1610,1801,557],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/10204"}],"collection":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/comments?post=10204"}],"version-history":[{"count":0,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/10204\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=10204"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=10204"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=10204"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}