{"id":2790,"date":"2012-11-29T23:30:52","date_gmt":"2012-11-29T15:30:52","guid":{"rendered":"http:\/\/www.zhangxinxu.com\/wordpress\/?p=2790"},"modified":"2020-04-22T10:51:42","modified_gmt":"2020-04-22T02:51:42","slug":"page-visibility-api-introduction-extend","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2012\/11\/page-visibility-api-introduction-extend\/","title":{"rendered":"Page Visibility(\u9875\u9762\u53ef\u89c1\u6027) API\u4ecb\u7ecd\u3001\u5fae\u62d3\u5c55"},"content":{"rendered":"<p>by <a href=\"https:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"https:\/\/www.zhangxinxu.com\/\">https:\/\/www.zhangxinxu.com<\/a><br \/>\n\u672c\u6587\u5730\u5740\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=2790\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=2790<\/a><\/p>\n<h3>\u4e00\u3001\u7f51\u9875\u541b\u7684\u60b2\u60c5\u8c01\u6765\u61c2<\/h3>\n<p>\u5509\uff0c\u7a81\u7136\u60f3\u5230\u4e86\u4e00\u9996\u60b2\u60c5\u8bd7\uff1a<\/p>\n<blockquote><p>\u6cea\u6e7f\u7f57\u5dfe\u68a6\u4e0d\u6210\uff0c\u591c\u6df1\u524d\u6bbf\u6309\u6b4c\u58f0\u3002<br \/>\n\u7ea2\u989c\u672a\u8001\u6069\u5148\u65ad\uff0c \u659c\u501a\u85b0\u7b3c\u5750\u5230\u660e\u3002<\/p><\/blockquote>\n<p>\u5b66\u751f\u65f6\u4ee3\u5b66\u8fc7\u7684\u4e00\u9996\u8bd7\uff0c\u5df2\u8fd8\u7ed9\u8001\u5e08\u4e0d\u77e5\u6240\u4e91\u7684\u8bf8\u4f4d\u53ef\u53c2\u89c1\u4e0b\u9762\u91ca\u4e49\uff1a<\/p>\n<blockquote><p>\u8bd7\u7684\u4e3b\u4eba\u516c\u662f\u4e00\u4f4d\u4e0d\u5e78\u7684\u5bab\u5973\u3002\u5979\u4e00\u5fc3\u76fc\u671b\u541b\u738b\u7684\u4e34\u5e78\u800c\u7ec8\u672a\u76fc\u5f97\uff0c\u65f6\u5df2\u6df1\u591c\uff0c\u53ea\u597d\u4e0a\u5e8a\uff0c\u5df2\u662f\u4e00\u5c42\u6028\u6005\u3002\u5ba0\u5e78\u4e0d\u53ef\u5f97\uff0c\u9000\u800c\u6c42\u4e4b\u597d\u68a6\uff1b\u8f97\u8f6c\u53cd\u4fa7\uff0c\u7adf\u8fde\u68a6\u4e5f\u96be\u6210\uff0c\u89c1\u51fa\u4e24\u5c42\u6028\u6005\u3002\u68a6\u65e2\u4e0d\u6210\uff0c\u7d22\u6027\u63fd\u8863\u63a8\u6795\uff0c\u6323\u624e\u5750\u8d77\u3002\u6b63\u5f53\u5979\u6101\u82e6\u96be\u5fcd\uff0c\u6cea\u6e7f\u7f57\u5dfe\u4e4b\u65f6\uff0c\u524d\u6bbf\u53c8\u4f20\u6765\u9635\u9635\u7b19\u6b4c\uff0c\u539f\u6765\u541b\u738b\u6b63\u5728\u90a3\u8fb9\u5bfb\u6b22\u4f5c\u4e50\uff0c\u8fd9\u5c31\u6709\u4e86\u4e09\u5c42\u6028\u6005\u3002\u5018\u4f7f\u4eba\u8001\u73e0\u9ec4\uff0c\u72b9\u53ef\u89e3\u8bf4\uff1b\u504f\u504f\u5979\u76db\u9b13\u5806\u9e26\uff0c\u7ea2\u989c\u672a\u8001\uff0c\u751f\u51fa\u56db\u5c42\u6028\u6005\u3002\u8981\u662f\u541b\u738b\u4e00\u76f4\u6ca1\u6709\u53d1\u73b0\u5979\uff0c\u90a3\u4e5f\u7f62\u4e86\uff1b\u4e8b\u5b9e\u662f\u5979\u66fe\u53d7\u8fc7\u541b\u738b\u7684\u6069\u5ba0\uff0c\u800c\u73b0\u5728\u8fd9\u79cd\u6069\u5ba0\u5374\u65e0\u7aef\u65ad\u7edd\uff0c\u89c1\u51fa\u4e94\u5c42\u6028\u6005\u3002\u591c\u5df2\u6df1\u6c89\uff0c\u6fd2\u4e8e\u7edd\u671b\uff0c\u4f46\u4e00\u8f6c\u5ff5\uff0c\u72b9\u7ffc\u541b\u738b\u5728\u542c\u6b4c\u8d4f\u821e\u4e4b\u540e\uff0c\u4f1a\u8bb0\u8d77\u5979\u6765\u3002\u4e8e\u662f\uff0c\u659c\u501a\u718f\u7b3c\uff0c\u6d53\u718f\u7fe0\u8896\uff0c\u4ee5\u5f85\u53ec\u5e78\u3002\u4e0d\u6599\uff0c\u4e00\u76f4\u5750\u5230\u5929\u660e\uff0c\u5e7b\u60f3\u7ec8\u5f52\u7834\u706d\uff0c\u89c1\u51fa\u516d\u5c42\u6028\u6005\u3002<\/p><\/blockquote>\n<p>\u4e3a\u4f55\u5728\u8fd9\u9633\u5149\u548c\u7166\uff0c\u5b89\u9759\u60ec\u610f\u7684\u6e29\u6696\u51ac\u65e5\u4f1a\u6709\u5982\u6b64\u611f\u4f24\u5462\uff1f<\/p>\n<p>\u5509\uff0c\u53ea\u56e0\u81ea\u5df1\u60f3\u5230\u4e86\u53ef\u601c\u7684\u7f51\u9875\u541b\uff0c\u5176\u547d\u8fd0\u5c31\u8ddf\u6df1\u5bab\u7684\u5bab\u5973\u4e00\u822c\uff0c\u4ee4\u4eba\u550f\u5618\u3002<\/p>\n<p>\u67d0\u541b\u738b\u556a\u556a\u556a\u556a\u6253\u5f00\u4e86\u5341\u51e0\u4e8c\u5341\u4e2a\u9009\u9879\u5361\uff08\u5c31\u50cf\u4ed6\u5f53\u521d\u556a\u556a\u556a\u556a\u5ba0\u5e78\u540e\u5bab\u90a3\u5341\u51e0\u4e8c\u5341\u4e2a\u5bab\u5973\u4e00\u6837\uff09\uff1b\u4f46\u662f\uff0c\u97ad\u957f\u83ab\u53ca\uff0c\u5176\u4e00\u6b21\u53ea\u80fd\u6d4f\u89c8\u4e00\u4e2a\u9009\u9879\u5361\uff08\u5c31\u50cf\u4ed6\u6bcf\u665a\u53ea\u80fd\u5ba0\u5e78\u4e00\u4e2a\u5bab\u5973\u4e00\u6837\uff09\uff1b\u53ef\u662f\uff0c\u5176\u4ed6\u7684\u9009\u9879\u5361\u5e76\u4e0d\u77e5\u9053\u541b\u738b\u4f55\u65f6\u4f1a\u518d\u8fc7\u6765\uff08\u5c31\u50cf\u5176\u4ed6\u7684\u5bab\u5973\u5e76\u4e0d\u6e05\u695a\u541b\u738b\u4eca\u665a\u4f1a\u4e0d\u4f1a\u6765\u5ba0\u5e78\u4e00\u6837\uff09\uff1b\u4e8e\u662f\uff0c\u5176\u4ed6\u9009\u9879\u5361\u4f9d\u7136\u5728\u4e0d\u505c\u5730\u8fd0\u884c\uff0c\u5b88\u5019\uff08\u5c31\u50cf\u5bab\u5973\u4f9d\u7136\u7559\u6709\u5e0c\u671b\uff0c\u7b49\u5f85\u53ec\u5e78\uff09\uff1b\u7136\u800c\uff0c\u6700\u540e\uff0c\u541b\u738b\u76f4\u63a5\u556a\u4e00\u4e0b\u6d4f\u89c8\u5668\u5173\u6389\u4e86\uff0cN\u591a\u4e0d\u505c\u5fe0\u5fc3\u5b88\u5019\u7684\u9009\u9879\u5361\u88ab\u65e0\u60c5\u6f20\u89c6\u4e86\uff08\u5c31\u50cf\u5bab\u5973\u4eec\u82e6\u5b88\u6574\u591c\uff0c\u7ed3\u679c\u5374\u662f\u4e00\u573a\u7a7a\uff0c\u53ea\u80fd\u4ee5\u6cea\u6d17\u9762\uff09\uff01<\/p>\n<p>\u6b64\u756a\u60b2\u60c5\u600e\u80fd\u4e0d\u8ba9\u4eba\u540c\u60c5\u601c\u60af\uff0c\u662f\u4e0d\u662f\u554a\uff0c\u8bf8\u4f4d\uff01<\/p>\n<p>\u54fc\uff0c\u8bf7\u4e0d\u8981\u6446\u51fa\u8fd9\u6837<img decoding=\"async\" src=\"https:\/\/mat1.gtimg.com\/www\/mb\/images\/face\/27.gif\" \/>\u6216\u8fd9\u6837<img decoding=\"async\" src=\"https:\/\/mat1.gtimg.com\/www\/mb\/images\/face\/98.gif\" \/>\u7684\u8868\u60c5\u3002<br \/>\n\u90a3\u4e2a\u8c01\u8c01\uff0c\u8bf4\u7684\u5c31\u662f\u4f60\uff01\u4f60\u5e94\u8be5\u8fd9\u6837\u5b50<img decoding=\"async\" src=\"https:\/\/mat1.gtimg.com\/www\/mb\/images\/face\/9.gif\" \/>\u6216\u8fd9\u6837\u5b50<img decoding=\"async\" src=\"https:\/\/mat1.gtimg.com\/www\/mb\/images\/face\/15.gif\" \/>\u3002<\/p>\n<p>\u60a8\u5e94\u8be5\u50cf\u624e\u897f\u62c9\u59c6\u00b7\u591a\u591a\u4e00\u6837\uff0c\u4e3a\u60b2\u60c5\u7f51\u9875\u541b\u8d4b\u8bd7\u4e00\u9996\u2014\u2014\u300a\u89c1\u4e0e\u4e0d\u89c1\u300b\uff1a<\/p>\n<blockquote><p>\u4f60\u89c1\uff0c\u6216\u8005\u4e0d\u89c1\u6211<br \/>\n\u6211\u5c31\u5728\u90a3\u91cc<br \/>\n\u4e0d\u60b2\u4e0d\u559c<br \/>\n\u4f60\u5ff5\uff0c\u6216\u8005\u4e0d\u5ff5\u6211<br \/>\n\u60c5\u5c31\u5728\u90a3\u91cc<br \/>\n\u4e0d\u6765\u4e0d\u53bb\u2026\u2026<\/p><\/blockquote>\n<p>\u65f6\u4ee3\u5728\u53d1\u5c55\uff0c\u5236\u5ea6\u4e5f\u4f1a\u8fdb\u6b65\u3002\u6bd4\u65b9\u8bf4\u660e\u4ee3\u5427\uff0c\u6bcf\u65e5\u5929\u6e10\u9ed1\u65f6\uff0c\u5ad4\u5983\u6240\u4f4f\u7684\u5bab\u95e8\u524d\uff0c\u90fd\u6302\u8d77\u4e24\u53ea\u7ea2\u7eb1\u7b3c\u706f\u3002\u7687\u5e1d\u4e34\u5e78\u67d0\u5bab\uff0c\u5219\u8be5\u5bab\u95e8\u4e0a\u7684\u706f\u5378\u4e0b\u6765\uff0c\u8868\u793a\u7687\u5e1d\u5df2\u9009\u5b9a\u5bdd\u5bbf\u7684\u5730\u65b9\u3002\u4e8e\u662f\uff0c\u8d1f\u8d23\u5de1\u8857\u7684\u5ba6\u5b98\uff0c\u4f20\u4ee4\u5176\u4ed6\u5404\u5bab\u5747\u5378\u706f\u5bdd\u606f\u3002\u5931\u610f\u7684\u5ad4\u5983\u4eec\u53ea\u5f97\u706d\u6389\u5e0c\u6c42\u5ba0\u5e78\u7684\u7ea2\u7eb1\u7b3c\uff0c\u660e\u665a\u518d\u91cd\u65b0\u6302\u4e0a\u3002<\/p>\n<p>\u8fd9\u5c31\u907f\u514d\u4e86\u5ad4\u5983\u4eec\u5f7b\u591c\u82e6\u7b49\uff0c\u54c0\u6028\u6cea\u96e8\u7684\u60c5\u5f62\u3002<\/p>\n<p>\u90a3\u7f51\u9875\u541b\u8fd9\u8fb9\u5462\uff1f<\/p>\n<p>\u597d\u5728\uff0c\u5c31\u6700\u8fd1\u51e0\u5e74\uff0c\u7f51\u9875\u541b\u4e5f\u6709\u4e86\u76f8\u5e94\u7684\u4e1c\u897f\uff0c\u53ef\u4ee5\u544a\u77e5\u7f51\u9875\u4f60\u662f\u201c\u5ba0\u5e78\u201d\u4e86\u5462\u8fd8\u662f\u4e0d\u88ab\u201c\u5ba0\u5e78\u201d\uff0c\u8fd9\u6837\uff0c\u53ef\u4ee5\u8ba9\u7f51\u9875\u541b\u5728\u4e0d\u88ab\u201c\u5ba0\u5e78\u201d\u65f6\u5019\u5b89\u5fc3\u7761\u89c9\uff0c\u6216\u8005\u517b\u4e2a\u5c0f\u767d\u3002\u8fd9\u4e2a\u4e1c\u897f\u5c31\u662f<a href=\"https:\/\/www.w3.org\/TR\/page-visibility\/\">Page Visibility API<\/a>\uff0c\u7ffb\u8bd1\u6210\u7b80\u4f53\u4e2d\u6587\u5c31\u662f\u201c<strong>\u9875\u9762\u53ef\u89c1\u6027\u5e94\u7528\u7a0b\u5e8f\u63a5\u53e3<\/strong>\u201d\u3002<\/p>\n<p>\u4e8e\u662f\u4e4e\uff0c\u7f51\u9875\u541b\u7684\u60b2\u60c5\u7a0b\u5ea6\u53ef\u4ee5lower\u4e00\u70b9\u4e86\uff0c\u4ece\u8fd9\u70b9\u6765\u8bf4\uff0cPage Visibility API\u662f\u4e2a\u5f88\u4eba\u6027\u5316\u7684\u8bbe\u8ba1\uff0c\u611f\u52a8<img decoding=\"async\" src=\"https:\/\/mat1.gtimg.com\/www\/mb\/images\/face\/111.gif\" \/>\uff01<\/p>\n<p><span class=\"s\">\/\/zxx: \u4e3a\u63a5\u5730\u6c14\uff0c\u4e0b&#8221;Page Visibility API&#8221;\u5747\u79f0\u547c\u4e3a\u201c\u9875\u9762\u53ef\u89c1\u6027API\u201d\u3002<\/span><\/p>\n<h3>\u4e8c\u3001\u9875\u9762\u53ef\u89c1\u6027API\u7a76\u7adf\u4e3a\u4f55\u7269\uff1f<\/h3>\n<p>CSS\u4e2d\u6709\u4e2a\u6709\u7528\u4e14\u6709\u8da3\u4e14\u4e2a\u4eba\u6bd4\u8f83\u559c\u6b22\u7684\u5c5e\u6027 &#8211; <code>visibility<\/code>. \u5176\u6709\u4e24\u4e2a\u5e38\u7528\u5c5e\u6027\u503c\uff1a<code>hidden<\/code>\u4e0e<code>visible<\/code>. \u5206\u522b\u8868\u793a\u4e0d\u53ef\u89c1\u4e0e\u53ef\u89c1\u3002OK\uff0c\u672c\u6587\u6240\u8bf4\u7684API\u4e2d\u4e5f\u6709<code>Visibility<\/code>\u8fd9\u4e2a\u5355\u8bcd\uff0c\u90a3\u4ed6\u4eec\u8868\u610f\u4e00\u81f4\uff1f<\/p>\n<p>\u56de\u7b54\u662f\uff1a<strong>YES!<\/strong>  <span class=\"s ml20\">\/\/\u4f17\u4eba\uff1a\u59b9\u554a\uff0c\u4f60\u4ee5\u4e3a\u662f\u4e2d\u56fd\u8fbe\u4eba\u79c0\u554a\uff01<\/span><\/p>\n<p>\u9875\u9762\u53ef\u89c1\u6027API\u5c31\u662f\u8868\u793a\u7f51\u9875\u53ef\u89c1\u8fd8\u662f\u4e0d\u53ef\u89c1\u7684\uff0c\u5de7\u7684\u662f\uff0c<code>hidden<\/code>\u4e0e<code>visible<\/code>\u5c31\u662f\u8be5API\u7684\u4e24\u4e2a\u72b6\u6001\u503c\u3002<\/p>\n<p>\u4e3e\u4e2a\u901a\u4fd7\u7684\u4f8b\u5b50\uff1a<br \/>\n\u5982\u679c\u4f60\u5728xxxxx.com\u4e0a\u6d4f\u89c8\u63d0\u795e\u7684\u56fe\u7247\uff0c\u5219\u5f53\u524d\u4f60\u6240\u770b\u7684\u8fd9\u4e2a\u7f51\u9875\u7684<code>visibility<\/code>\u5c31\u662f<code>visible<\/code>. <\/p>\n<p>\u6b64\u65f6\uff0c\u5982\u679c\u4f60\u8001\u5988\u5b50\u7a81\u7136\u8fdb\u6765\u7ed9\u4f60\u9001\u9999\u8549\uff0c\u51fa\u73b0\u4e0b\u56fe\u6240\u793a\u573a\u666f\uff1a<br \/>\n<img decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/blog\/202004\/why-son-sceen.jpg\" alt=\"\u603b\u662f\u5728\u770b\u684c\u9762\" \/><\/p>\n<p>\u5219\uff0c\u6b64\u65f6\u4e4b\u524d\u63d0\u795e\u7684\u7f51\u9875\u7684<code>visibility<\/code>\u5c31\u662f<code>hidden<\/code> &#8211; \u6700\u5c0f\u5316\u3002<\/p>\n<p>\u6216\u8005\u8001\u5988\u5b50\u8fdb\u6765\u7684\u65f6\u5019\uff0c\u5207\u6362\u5230\u4eba\u6c11\u7f51\uff0c\u63d0\u795e\u7f51\u9875\u7684<code>visibility<\/code>\u4e5f\u662f<code>hidden<\/code> &#8211; \u5207\u6362\u9009\u9879\u5361\u3002<\/p>\n<p><img decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/blog\/202004\/banana.jpg\" \/> <span class=\"s\">\u8001\u5988\u5b50\u9001\u7684\u9999\u8549~~\u5566\u5566\u5566\u5566\u5566~~<\/span><\/p>\n<p>\u8fd9\u5c31\u662f\u9875\u9762\u53ef\u89c1\u6027API\u7684\u76f4\u89c2\u8ba4\u8bc6\uff0c\u81f3\u4e8e\u5176\u8eab\u4e0a\u54ea\u91cc\u6709\u9ebb\u5b50\uff0c\u4e0b\u9762\u4f1a\u6307\u51fa<img decoding=\"async\" src=\"https:\/\/mat1.gtimg.com\/www\/mb\/images\/face\/60.gif\" \/>.<\/p>\n<h3>\u4e09\u3001\u9875\u9762\u53ef\u89c1\u6027API\u5c5e\u6027\u548c\u4e8b\u4ef6<\/h3>\n<p>\u76ee\u524d\u9875\u9762\u53ef\u89c1\u6027API\u6709\u4e24\u4e2a\u5c5e\u6027\uff0c\u4e00\u4e2a\u4e8b\u4ef6\uff0c\u5982\u4e0b\uff1a<\/p>\n<ul id=\"ul\">\n<li><code>document.hidden<\/code>: Boolean\u503c\uff0c\u8868\u793a\u5f53\u524d\u9875\u9762\u53ef\u89c1\u8fd8\u662f\u4e0d\u53ef\u89c1<\/li>\n<li><code>document.visibilityState<\/code>: \u8fd4\u56de\u5f53\u524d\u9875\u9762\u7684\u53ef\u89c1\u72b6\u6001\u3002\n<ol>\n<li>&#8220;<code>hidden<\/code>&#8220;<\/li>\n<li>&#8220;<code>visible<\/code>&#8220;<\/li>\n<li>&#8220;<code>prerender<\/code>&#8221;  \u8fd9\u4e2a\u8868\u793a\u7eb3\u5c3c\u5462<img decoding=\"async\" src=\"https:\/\/mat1.gtimg.com\/www\/mb\/images\/face\/32.gif\" \/>~~\u6069\uff0c\u6211\u4e5f\u4e0d\u786e\u5b9a\uff0c\u5b57\u9762\u610f\u601d\u662f\u201c\u9884\u6e32\u67d3\u201d\u3002\u83ab\u975e\u6307\u7684\u662f\u556a\u556a\u556a\u4e00\u4e0b\u5b50\u5f00\u4e86\u5f88\u591a\u4e2a\u9009\u9879\u5361\uff0c\u4e4b\u524d\u9009\u9879\u5361\u4f9d\u7136\u5728\u52a0\u8f7d\u6e32\u67d3\u7684\u72b6\u6001\uff1f\u6216\u8005\u8bf4\u662f\u6d4f\u89c8\u5668\u65b0\u6253\u5f00\u65f6\u8bb0\u4f4f\u7684\u4e0a\u4e00\u6b21\u5173\u95ed\u9009\u9879\u5361\u7684\u72b6\u6001\uff1f\u6c42\u8fbe\u4eba\u6307\u660e\uff01<\/li>\n<li>&#8220;<code style=\"color:#666;\">preview<\/code>&#8221; \u9884\u89c8\u3002\u6839\u636e\u90e8\u52062011\u5e74\u5e95\u76f8\u5173\u56fd\u5916\u90e8\u5206\u6587\u7ae0\u7684\u8bf4\u6cd5\uff0c\u8fd9\u79cd\u72b6\u6001\u51fa\u73b0\u5728\uff0c\u5982window7\u7cfb\u7edf\u4e0b\uff0c\u9f20\u6807\u653e\u5728\u5e95\u90e8\uff08\u4e00\u822c\u662f\uff09\u4efb\u52a1\u680f\u7684\u56fe\u6807\u4e0a\uff08\u9884\u89c8\uff09\u7684\u65f6\u5019\u3002\u89c1\u4e0b\u622a\u56fe\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"win7\u9f20\u6807\u56fe\u6807\u7a0b\u5e8f\u754c\u9762\u9884\u89c8 \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/201211\/2012-11-29_110709.png\" title=\"win7\u9f20\u6807\u56fe\u6807\u7a0b\u5e8f\u754c\u9762\u9884\u89c8\" class=\"alignnone\" width=\"330\" height=\"277\" \/><\/p>\n<p>\u4f46\u662f\u6839\u636e\u81ea\u5df1\u7684\u5b9e\u9645\u6d4b\u8bd5\uff0c\u4f3c\u4e4e\u5e76\u6ca1\u6709\u8fd9\u79cd\u72b6\u6001\u7684\u6539\u53d8\u2014\u2014\u5305\u62ecIE10\u6d4f\u89c8\u5668\u3002\u53ef\u80fd\u662f\u65f6\u4ee3\u6539\u53d8\uff0c\u4e00\u5207\u90fd\u9075\u5faa\u89c4\u8303\u4e86\u5427\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u91cd\u70b9\u5173\u6ce8\u524d\u9762\u4e09\u4e2a\u72b6\u6001\u503c\u5c31\u53ef\u4ee5\u4e86\u3002\n<\/li>\n<\/ol>\n<\/li>\n<li><code>visibilitychange<\/code>: \u5f53\u53ef\u89c1\u72b6\u6001\u6539\u53d8\u65f6\u5019\u89e6\u53d1\u7684\u4e8b\u4ef6\u3002<\/li>\n<\/ul>\n<h3>\u56db\u3001\u6d4f\u89c8\u5668\u652f\u6301\u4e0e\u79c1\u6709\u524d\u7f00<\/h3>\n<p>\u6211\u5199\u4e86\u4e2a\u5982\u4e0b\u7684\u9875\u9762\u53ef\u89c1\u6027API\u652f\u6301\u6027\u7684\u6d4b\u8bd5\u4ee3\u7801\uff1a<\/p>\n<div class=\"zxx_code\">\n<pre>var isPageVisibilitySupport = (function() {\r\n    var support = false;\r\n    if (typeof window.screenX === \"number\") {\r\n        [\"webkit\", \"moz\", \"ms\", \"o\", \"\"].forEach(function(prefix) {\r\n            if (support == false && document[prefix + (prefix? \"H\": \"h\") + \"idden\"] + \"\" !== \"undefined\") {\r\n                support = true;\r\n            }\r\n        });        \r\n    }\r\n    return support;\r\n})();<\/pre>\n<\/div>\n<p>\u6d4b\u8bd5\u53d1\u73b0\uff0c\u5982\u4e0b\u6d4f\u89c8\u5668\u90fd\u662f<strong>\u652f\u6301\u7684<\/strong>\uff1a<\/p>\n<ul>\n<li>Chrome 21<\/li>\n<li>FireFox 16.0.2<\/li>\n<li>Opera 12.11<\/li>\n<li>IE10<\/li>\n<\/ul>\n<p><strong>\u4e0d\u652f\u6301\u7684<\/strong>\u6d4f\u89c8\u5668\uff1a<\/p>\n<ul>\n<li>IE9<\/li>\n<li>Safari 5.1<\/li>\n<\/ul>\n<p>\u56e0\u6b64\uff0c<code>typeof document.msHidden != \"undefined\"<\/code>\u53ef\u4ee5\u7528\u6765\u533a\u5206IE9\u6d4f\u89c8\u5668\u8fd8\u662fIE10\u6d4f\u89c8\u5668\u3002<\/p>\n<p>\u6b63\u5982\u4e0a\u9762\u7684code\u6240\u5c55\u793a\u7684\uff0c\u9875\u9762\u53ef\u89c1\u6027API\u7684\u6240\u6709\u5c5e\u6027\u4ee5\u53ca\u4e8b\u4ef6\uff0c\u76ee\u524d\u662f\u9700\u8981\u4f7f\u7528\u79c1\u6709\u524d\u7f00\u7684\uff08\u5982\u679c\u6ca1\u6709\u8fd9\u4e9b\u524d\u7f00\uff0c\u6d4f\u89c8\u5668\u5c31\u4e0d\u8ba4\u8bc6\u8fd9\u4e9b\u5c5e\u6027\u6216\u65b9\u6cd5\u4e86\uff09\u3002<br \/>\n\u4e00\u65e6\u6709\u4e86\u524d\u7f00\uff0c\u5b9e\u9645\u5e94\u7528\u7684\u65f6\u5019\u4ee3\u7801\u5c31\u6709\u4e9b\u5570\u54e9\u5427\u55e6\u4e86\uff08\u53ef\u89c1\u53c2\u89c1\u6587\u7ae0\u5e95\u90e8\u53c2\u8003\u6587\u7ae0\u4e2d\u5c55\u793a\u7684\u4ee3\u7801\uff09\uff01<\/p>\n<p>\u56e0\u4e3a\u8981\u4e00\u4e2a\u524d\u7f00\u4e00\u4e2a\u524d\u7f00\u5224\u65ad\u2014\u2014oh, my! <img decoding=\"async\" src=\"https:\/\/mat1.gtimg.com\/www\/mb\/images\/face\/34.gif\" \/> \u6211\u8fd9\u4e2a\u61d2\u4eba\u6700\u4e0d\u559c\u6b22\u8fd9\u7b49\u9ebb\u70e6\u4e8b\u4e86\uff0c\u4e8e\u662f\uff0c\u635e\u8d77\u8896\u5b50\uff0c\u556a\u556a\u556a\u556a\u6574\u4e2a\u4e00\u4e2a\u517c\u5bb9\u6027\u7684Page Visibility API\u76f8\u5173\u5bf9\u8c61\uff0c\u6b63\u597d\u5305\u542bAPI\u4e2d\u7684\u4e24\u4e2a\u5c5e\u6027\u4ee5\u53ca\u4e00\u4e2a\u4e8b\u4ef6\u3002\u5b8c\u6574\u4ee3\u7801\u5982\u4e0b\uff08\u8282\u7701\u7bc7\u5e45\uff0c\u6eda\u52a8\u663e\u793a<span class=\"hidden\">\u3002\u5982\u679c\u60a8\u53d1\u73b0\u6ca1\u6709\u6eda\u52a8\u6548\u679c\u554a\uff1f\u53ef\u80fd\u662f\u7531\u4e8e\u5728\u5176\u4ed6\u7f51\u7ad9\u6216\u662fRSS\u4e2d\u9605\u8bfb\u672c\u6587\uff0c\u672c\u6587\u539f\u5730\u5740\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=2790\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=2790<\/a>\uff0c\u672c\u6587\u4f5c\u8005\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/\">\u5f20\u946b\u65ed<\/a>\uff0c\u6765\u81ea\u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\uff0c\u8bbf\u95ee\u539f\u51fa\u5904\u9605\u8bfb\u4f53\u9a8c\u66f4\u4f73\u3002<\/span><br \/>\n\uff09\uff1a<\/p>\n<div class=\"zxx_code\" style=\"height:320px; overflow:auto;resize:vertical;\">\n<pre>var pageVisibility = (function() {\r\n    var prefixSupport, keyWithPrefix = function(prefix, key) {\r\n        if (prefix !== \"\") {\r\n            <span style=\"color:green;\">\/\/ \u9996\u5b57\u6bcd\u5927\u5199<\/span>\r\n            return prefix + key.slice(0,1).toUpperCase() + key.slice(1);    \r\n        }\r\n        return key;\r\n    };\r\n    var isPageVisibilitySupport = (function() {\r\n        var support = false;\r\n        if (typeof window.screenX === \"number\") {\r\n            [\"webkit\", \"moz\", \"ms\", \"o\", \"\"].forEach(function(prefix) {\r\n                if (support == false && document[keyWithPrefix(prefix, \"hidden\")] != undefined) {\r\n                    prefixSupport = prefix;\r\n                    support = true;   \r\n                }\r\n            });        \r\n        }\r\n        return support;\r\n    })();\r\n    \r\n    var isHidden = function() {\r\n        if (isPageVisibilitySupport) {\r\n            return document[keyWithPrefix(prefixSupport, \"hidden\")];\r\n        }\r\n        return undefined;\r\n    };\r\n    \r\n    var visibilityState = function() {\r\n        if (isPageVisibilitySupport) {\r\n            return document[keyWithPrefix(prefixSupport, \"visibilityState\")];\r\n        }\r\n        return undefined;\r\n    };\r\n    \r\n    return {\r\n        <span style=\"color:#cd0000;\">hidden<\/span>: isHidden(),\r\n        <span style=\"color:#cd0000;\">visibilityState<\/span>: visibilityState(),\r\n        <span style=\"color:#cd0000;\">visibilitychange<\/span>: function(fn, usecapture) {\r\n            usecapture = undefined || false;\r\n            if (isPageVisibilitySupport && typeof fn === \"function\") {\r\n                return document.addEventListener(prefixSupport + \"visibilitychange\", function(evt) {\r\n                    this.hidden = isHidden();\r\n                    this.visibilityState = visibilityState();\r\n                    fn.call(this, evt);\r\n                }.bind(this), usecapture);\r\n            }\r\n            return undefined;\r\n        }\r\n    };    \r\n})(undefined);<\/pre>\n<\/div>\n<p>\u6216\u8005\u76f4\u63a5\u8c03\u7528\uff1a<\/p>\n<div class=\"zxx_code\">\n<pre>&lt;script src=\"https:\/\/www.zhangxinxu.com\/study\/201211\/pageVisibility.js\">&lt;\/script><\/pre>\n<\/div>\n<p>\u5176\u4e2d\u5177\u4f53\u7ec6\u8282\u65e0\u9700\u5173\u5fc3\uff0c\u5b9e\u9645\u4e0a\u4e0a\u9762\u8fd9\u4e48\u591a\u4ee3\u7801\u672c\u8d28\u4e0a\u5c31\u662f\u4e0b\u9762\u8fd9\u70b9\uff1a<\/p>\n<div class=\"zxx_code\">\n<pre>\r\nvar pageVisibility = {\r\n    <span style=\"color:#cd0000;\">hidden<\/span>: <em>Boolean<\/em>\r\n    <span style=\"color:#cd0000;\">visibilityState<\/span>: <em>String<\/em>\r\n    <span style=\"color:#cd0000;\">visibilitychange<\/span>: <em>Function<\/em>\r\n};\r\n<\/pre>\n<\/div>\n<p>\u4e0e_\u539f\u751f\u5c5e\u6027\u4e8b\u4ef6_\u5bf9\u5e94\u5173\u7cfb\u5982\u4e0b\uff1a<\/p>\n<div class=\"zxx_code\">\n<pre>pageVisibility.hidden === document.hidden\uff08\u517c\u5bb9\u5904\u7406\uff09\r\npageVisibility.visibilityState=== document.visibilityState\uff08\u517c\u5bb9\u5904\u7406\uff09\r\npageVisibility.visibilitychange(function() { <span style=\"color:green;\">\/* this\u6307\u7684\u5c31\u662fpageVisibility *\/<\/span> }); === document.addEventListener(\"visibilitychange\", function() {});\uff08\u517c\u5bb9\u5904\u7406\uff09\r\n<\/pre>\n<\/div>\n<p>\u4e8e\u662f\uff0c\u8981\u5224\u65ad\u4e00\u4e2a\u6d4f\u89c8\u5668\u662f\u5426\u652f\u6301\u9875\u9762\u53ef\u89c1\u6027API\u5982\u4e0b\u4ee3\u7801\u5c31\u53ef\u4ee5\u4e86\uff08\u65e0\u9700\u4ec0\u4e48webkit\u6216moz\u6216ms\u7b49\u524d\u7f00\u4e00\u4e2a\u4e2a\u5224\u65ad\u4e86\uff09\uff1a<\/p>\n<div class=\"zxx_code\">\n<pre>var isSupport = typeof pageVisibility.hidden !== \"undefined\"<\/pre>\n<\/div>\n<p><strong>\u6d4b\u8bd5demo<\/strong><br \/>\n\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a<a class=\"a_link\" target=\"_blank\" href=\"https:\/\/www.zhangxinxu.com\/study\/201211\/page-visibility-api-support-basic.html\">\u517c\u5bb9\u6027\u7684\u7f51\u9875\u53ef\u89c1\u6027API\u5c5e\u6027\u4e0e\u4e8b\u4ef6demo<\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\u7f51\u9875\u53ef\u89c1\u6027 API\u57fa\u672c\u5c5e\u6027\u4e0e\u4e8b\u4ef6\u5b9e\u4f8b\u9875\u9762\u622a\u56fe \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/201211\/2012-11-29_200225.png\" title=\"\u7f51\u9875\u53ef\u89c1\u6027 API\u57fa\u672c\u5c5e\u6027\u4e0e\u4e8b\u4ef6\u5b9e\u4f8b\u9875\u9762\u622a\u56fe\" class=\"alignnone\" width=\"407\" height=\"456\" \/><\/p>\n<p> \u5bf9\u4e8e\u4e0d\u652f\u6301\u7684\u6d4f\u89c8\u5668\uff0c\u5982IE9\u6d4f\u89c8\u5668\uff0c\u663e\u793a\u7684\u5219\u662f&#8221;<code>undefined<\/code>&#8220;\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\u4e0d\u652f\u6301\u7f51\u9875\u53ef\u89c1\u6027API\u6d4f\u89c8\u5668\u663e\u793aundefined  \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/201211\/2012-11-29_201142.png\" title=\"\u4e0d\u652f\u6301\u7f51\u9875\u53ef\u89c1\u6027API\u6d4f\u89c8\u5668\u663e\u793aundefined \" class=\"alignnone\" width=\"446\" height=\"234\" \/><\/p>\n<p>OK\uff0c\u4e07\u5c4e\u5177\u5907\uff0c\u53ea\u6b20\u8349\u7eb8\u4e86\uff01\u4e0b\u9762\uff0c\u770b\u770b\uff0c\u9875\u9762\u53ef\u89c1\u6027API\u90fd\u6709\u4e9b\u53ef\u4ee5\u6709\u7684\u5b9e\u9645\u5e94\u7528\u3002<\/p>\n<h3>\u4e94\u3001\u9875\u9762\u53ef\u89c1\u6027API\u5b9e\u9645\u5e94\u7528<\/h3>\n<p>\u5148\u6765\u770b\u770b\u8001\u5916\u7ed9\u7684\u4e00\u4e2a\u4f8b\u5b50\uff0c\u6211\u89c9\u5f97\u5f88\u6709\u5b9e\u9645\u5e94\u7528\u4ef7\u503c\u7684\u3002<\/p>\n<p>\u9996\u5148\u662f\u94fe\u63a5\u5730\u5740\uff1a<a href=\"http:\/\/www.samdutton.com\/pageVisibility\/\">http:\/\/www.samdutton.com\/pageVisibility\/<\/a> <span class=\"s\">\/\/zxx: \u5e0c\u671b\u4e0d\u8981\u660e\u5e74\u8fd9\u4e2a\u65f6\u5019\u88ab\u5899\u6389<\/span><\/p>\n<p>\u8fdb\u53bb\u540e\uff0c\u4f1a\u6709\u4e00\u4e2aHTML5 video\u663e\u793a\u7684Google Chrome\u6d4f\u89c8\u5668\u5e7f\u544a\u768430\u79d2funny\u89c6\u9891\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\u89c6\u9891\u622a\u56fe\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/201211\/2012-11-29_202553.png\" title=\"\u89c6\u9891\u622a\u56fe\" class=\"alignnone\" width=\"506\" height=\"376\" \/><\/p>\n<p>\u76f4\u63a5\u6d4f\u89c8\u4f60\u662f\u770b\u4e0d\u51fa\u4ec0\u4e48\u7384\u4e4e\u7684\uff0c\u8bf7\u5207\u6362\u4e00\u4e2a\u9009\u9879\u5361\uff0c\u8ba9\u8be5\u9875\u9762\u7f6e\u4e8e\u540e\u9762\uff0c\u7ed3\u679c\uff0c\u60a8\u4f1a\u53d1\u73b0\u8fd9\u4e2a\u9009\u9879\u5361\u7684\u6807\u9898\u680f\u53d8\u6210\u4e86\u8fd9\u6837\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\u6807\u9898\u680f\u663e\u793a\u89c6\u9891\u6682\u505c\u4ee5\u53ca\u6682\u505c\u65f6\u95f4\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/201211\/2012-11-29_203118.png\" title=\"\u6807\u9898\u680f\u663e\u793a\u89c6\u9891\u6682\u505c\u4ee5\u53ca\u6682\u505c\u65f6\u95f4\" class=\"alignnone\" width=\"157\" height=\"48\" \/><\/p>\n<p>\u770b\u51fa\u6765\u6ca1\uff1f\u89c6\u9891\u64ad\u653e\u88ab\u4e2d\u65ad\u4e86\u2014\u2014\u5f53page\u4e0d\u53ef\u89c1\u7684\u65f6\u5019\uff0c\u89c6\u9891\u4f1a\u81ea\u52a8\u6682\u505c\uff01<\/p>\n<p>\u6b64\u65f6\uff0c\u60a8\u518d\u8fdb\u5165\u8be5\u9009\u9879\u5361\uff0c\u89c6\u9891\u53c8\u4ece\u521a\u624d\u7684\u5730\u65b9\u7ee7\u7eed\u64ad\u653e\u4e86\uff0c\u5982\u4e0b\u622a\u56fe\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\u9875\u9762\u53ef\u89c1\u89c6\u9891\u7ee7\u7eed\u64ad\u653e \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/201211\/2012-11-29_203714.png\" title=\"\u9875\u9762\u53ef\u89c1\u89c6\u9891\u7ee7\u7eed\u64ad\u653e\" class=\"alignnone\" width=\"160\" height=\"51\" \/><\/p>\n<p>\u4e2a\u4eba\u611a\u89c1\uff0c\u56fd\u5185\u7684\u4e00\u4e9b\u89c6\u9891\u7ad9\u70b9\u662f\u4e0d\u662f\u53ef\u4ee5\u5e94\u7528\u4e0b\u8fd9\u4e2aAPI\u5462\uff01\u8fd9\u6837\u5f53\u5988\u5988\u8fdb\u6765\u9001\u9999\u8549\u7684\u65f6\u5019\uff0c\u76f4\u63a5win+D\u663e\u793a\u684c\u9762\u5c31\u53ef\u4ee5\u4e86\uff0c\u58f0\u97f3\u554a\u4ec0\u4e48\u7684\u4f1a\u81ea\u52a8\u5173\u6389\uff0c\u632f\u594b\u89c6\u9891\u81ea\u52a8\u6682\u505c\uff0c\u591a\u8d5e\u7684\u4e00\u4e2a\u529f\u80fd\u554a\uff01\u4ee5\u524d\u7684\u6682\u505c\u89c6\u9891+\u6700\u5c0f\u5316\u6d4f\u89c8\u5668\u76f4\u63a5\u53d8\u6210\u4e86\u4e00\u6b65\u2192\u6700\u5c0f\u5316\uff0c\u8282\u7ea6\u4e86\u5927\u91cf\u7684\u5b9d\u8d35\u65f6\u95f4\uff0c\u6781\u5927\u4e86\u63d0\u5347\u4e86\u7528\u6237\u4f53\u9a8c\uff0c<img decoding=\"async\" src=\"https:\/\/mat1.gtimg.com\/www\/mb\/images\/face\/101.gif\" \/>\u6069\uff01\u4e0d\u9519\uff01\uff01<\/p>\n<p>\u4e0a\u9762\u7684\u4f8b\u5b50\u6bd5\u7adf\u957f\u5728\u5916\u4eba\u7530\u554a\uff0c\u4e00\u65e6\u5efa\u8d77\u4e86\u56f4\u5899\u5c31\u770b\u4e0d\u5230\u4e86\uff0c\u56e0\u6b64\uff0c\u81ea\u5df1\u6298\u817e\u4e86\u4e00\u4e2a\u7b80\u5355\u768410\u79d2\u949f\u4f4e\u8d28\u91cf\u7684\u732b\u732b\u7248\u672c\u3002\/\/zxx: \u4e0a\u9762\u4f8b\u5b50\u89c6\u98913M+\uff0c\u6211\u4f30\u7b97\u4e86\u4e0b\uff0c1000\u6b21\u8bbf\u95ee\u7684\u8bdd\uff0c\u6211\u52d2\u4e2a\u53bb\uff0c\u5dee\u4e0d\u591a3\u4e2aG\u7684\u6d41\u91cf\u53bb\u4e86\uff0c\u6211\u73b0\u5728\u6bcf\u6708\u6d41\u91cf\u90fd\u5c8c\u5c8c\u53ef\u5371\uff0c\u56e0\u6b64\uff0c\u5927\u5bb6\u5c06\u5c31\u4e0b\u4e0b\u8fd9\u4e2a\u767e\u6765K\u7684\u89c6\u9891\uff08Chrome\u6d4f\u89c8\u5668\u4ee5\u53caIE10\u4e0b\u53ef\u8bbf\u95ee\uff0c\u6216\u8005\u8c01\u7ed9\u6211\u5c3a\u5bf8\u5c0f\u4e00\u70b9\u7684ogv\u683c\u5f0f\u4efb\u610f\u89c6\u9891\uff0c\u8ba9FireFox\u4e5f\u80fdOK\uff09~~<\/p>\n<p>\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a<a class=\"a_link\" target=\"_blank\" href=\"https:\/\/www.zhangxinxu.com\/study\/201211\/page-visibility-api-video-auto-pause-play.html\">10\u79d2\u949f\u5988\u5988\u6765\u81ea\u52a8\u6682\u505c\u89c6\u9891demo<\/a><\/p>\n<p>\u64cd\u4f5c\u540c\u4e0a\uff0c\u8fdb\u5165\u9875\u9762\u64ad\u653e\uff0c\u79bb\u5f00\u9875\u9762\u6682\u505c\u3002<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"Chrome\u6d4f\u89c8\u5668\u4e0b\u6548\u679c\u622a\u56fe \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/201211\/2012-11-29_213838.png\" title=\"Chrome\u6d4f\u89c8\u5668\u4e0b\u6548\u679c\u622a\u56fe\" class=\"alignnone\" width=\"435\" height=\"308\" \/><\/p>\n<p><strong>\u767b\u5f55\u540c\u6b65<\/strong><br \/>\n\u8fd9\u662f\u6211\u60f3\u7684\u4e00\u4e2a\u89c9\u5f97\u86ee\u5b9e\u7528\u7684\u5e94\u7528\u3002\u6709\u5982\u4e0b\u573a\u666f\uff1a<br \/>\n1. \u53bb\u6dd8\u5b9d\u4e70\u4e1c\u897f\uff0c\u672a\u767b\u5f55\u72b6\u6001\u4e0b\uff0c\u8fdb\u5165\u9996\u9875\u3002<br \/>\n2. \u7136\u540e\u65b0\u7a97\u53e3\u6253\u5f00\u4efb\u610f\u9875\u9762\uff0c\u767b\u5f55\u5e76\u6210\u529f\u8fd4\u56de\u3002<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\u6dd8\u5b9d\u7f51\u6210\u529f\u767b\u5f55 \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/201211\/2012-11-29_220307.png\" title=\"\u6dd8\u5b9d\u7f51\u6210\u529f\u767b\u5f55\" class=\"alignnone\" width=\"370\" height=\"265\" \/><br \/>\n3. \u518d\u6b21\u8bbf\u95ee\u521a\u624d\u6253\u5f00\u7684\u9996\u9875\uff0c\u53d1\u73b0\u9875\u9762\u8fd8\u662f\u672a\u767b\u5f55\u72b6\u6001\uff08\u89c1\u4e0b\u56fe\uff09\uff0c\u5b9e\u9645\u4e0a\u7528\u6237\u5df2\u7ecf\u767b\u5f55\u4e86\u3002<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\u4e4b\u524d\u7684\u9996\u9875\u4ecd\u7136\u662f\u672a\u767b\u5f55\u72b6\u6001\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/201211\/2012-11-29_220623.png\" title=\"\u4e4b\u524d\u7684\u9996\u9875\u4ecd\u7136\u662f\u672a\u767b\u5f55\u72b6\u6001\" class=\"alignnone\" width=\"411\" height=\"178\" \/><\/p>\n<p>\u76ee\u524d\uff0c\u8fd9\u79cd\u72b6\u6001\u5927\u5bb6\u4f3c\u4e4e\u4e60\u4ee5\u4e3a\u5e38\uff0c\u89c9\u5f97\u5f88OK\uff0c\u5b9e\u9645\u4e0a\u8fd9\u79cd\u7cdf\u7cd5\u7684\u3002\u5c31\u50cf\u6ca1\u6709\u7a7a\u8c03\u7684\u5c81\u6708\u91cc\uff0c\u4eba\u4eec\u89c9\u5f97\u98ce\u6247\u5f88OK\u554a\uff1b\u4f46\u662f\uff0c\u73b0\u5728\u5462\uff0c\u8fd8\u6709\u8c01\u5c4b\u9876\u540a\u4e2a\u98ce\u6247\u5417\uff01\uff01\u6709\u4e86\u9875\u9762\u53ef\u89c1\u6027API\uff0c\u6211\u4eec\u53ef\u4ee5\u628a\u4f53\u9a8c\u505a\u5730\u66f4\u597d\u3002<\/p>\n<p>\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a<a class=\"a_link\" target=\"_blank\" href=\"https:\/\/www.zhangxinxu.com\/study\/201211\/page-visibility-api-login-same-step-1.html\">\u7f51\u9875\u53ef\u89c1\u6027API\u4e0e\u767b\u5f55\u540c\u6b65demo<\/a><\/p>\n<p>\u4e0d\u51fa\u610f\u5916\uff0c\u60a8\u9ed8\u8ba4\u8fdb\u6765\u5e94\u8be5\u662f\u63d0\u793a\u4f60\u767b\u5f55\u7684\uff1a<br \/>\n<img decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/201211\/2012-11-29_231025.png\" \/><\/p>\n<p>\u70b9\u51fb\u4e0a\u56fe\u6240\u793a\u7684\u201c\u767b\u5f55\u201d\u6587\u5b57\u94fe\u63a5\uff0c\u4f1a\u5728\u65b0\u7a97\u53e3\u65e0\u5237\u65b0\u767b\u5f55\u3002\u4efb\u610f\u7528\u6237\u540d\u548c\u5bc6\u7801\uff0c\u6210\u529f\u540e\u518d\u56de\u5230\u4e4b\u524d\u63d0\u793a\u7684\u767b\u5f55\u9875\u9762\uff0c\u5df2\u7ecf\u53d8\u6210\u4e86\uff1a\u201c\u6b22\u8fce\u56de\u6765\uff0c\u67d0\u67d0\u67d0\u201d\u4e86\uff01<br \/>\n<img decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/201211\/2012-11-29_231250.png\" \/> <img decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/201211\/2012-11-29_231317.png\" \/><\/p>\n<p>\u53ea\u8981\u8be5\u9875\u9762\u4e0d\u88ab\u5173\u95ed\uff0c\u4f60\u600e\u6837\u5237\u65b0\uff0c\u90fd\u662f\u201c\u6b22\u8fce\u56de\u6765\uff0c\u67d0\u67d0\u67d0\u201d\u3002\u4e0d\u8fc7\uff0c\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u68c0\u6d4b\u5230\u5df2\u7ecf\u767b\u5f55\u6210\u529f\uff0c\u76f4\u63a5\u5237\u65b0\u5f53\u524d\u9875\u9762\u7684\u5c45\u591a\uff01IE10\u4e0b\uff0c\u8c8c\u4f3c\u672c\u5730\u5b58\u50a8\u65e0\u6cd5\u540c\u6e90\u4e0d\u540c\u9875\u9762\u5171\u4eab\uff0c\u8fd9\u4f7f\u5f97\u901a\u8fc7HTML5\u672c\u5730\u5b58\u50a8\u5171\u4eab\u4fe1\u606f\u7684\u505a\u6cd5\u9047\u5230\u4e86\u4e9b\u8bb8\u963b\u788d\u3002<\/p>\n<p><strong>\u7cbe\u786e\u7684\u5728\u7ebf\u65f6\u957f<\/strong><br \/>\n\u8fd9\u4e2a\u4e0d\u7528\u591a\u8bf4\uff0c\u53ea\u6709\u7528\u6237\u5f53\u524d\u8fd9\u4e2a\u9875\u9762\u53ef\u89c1\u7684\u65f6\u5019\uff0c\u624d\u8ba1\u7b97\u5728\u7ebf\u65f6\u95f4\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u6302\u673a\u7684\u60c5\u51b5\uff0c\u65f6\u957f\u8ba1\u7b97\u66f4\u51c6\u786e\uff08\u8fd9\u4e2a\u53ef\u80fd\u4e0d\u662f\u4e2a\u597didea\uff09\u3002<\/p>\n<p><strong>\u5728\u7ebf\u804a\u5929\u79bb\u5f00\u72b6\u6001<\/strong><br \/>\n\u7f51\u9875\u804a\u5929\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u77e5\u9053\u7528\u6237\u662f\u5426\u201c\u79bb\u5f00\u201d\u8fd8\u662f\u201c\u79bb\u7ebf\u201d\u8fd8\u662f\u201c\u4e0b\u7ebf\u201d\u3002\u5f53\u524d\u9875\u9762\u4e0d\u53ef\u89c1\uff0c\u4f46\u8fde\u63a5\u8fd8\u5728\u7684\u65f6\u5019\uff0c\u6211\u4eec\u53ef\u4ee5\u786e\u5b9a\u8be5\u4eba\u662f\u79bb\u5f00\u7684\uff08\u6d89\u53ca\u9690\u79c1\uff0c\u53ef\u80fd\u4e5f\u4e0d\u662f\u4e2a\u597didea\uff09\u3002<\/p>\n<p>\u4ee5\u53ca<strong>\u5176\u4ed6\u4e9b\u5e94\u7528\u9700\u6c42<\/strong><br \/>\n\u7b49\u5230\u4e86\u5b9e\u9645\u9700\u6c42\u7684\u65f6\u5019\uff0c\u5c31\u4f1a\u60f3\u5230\u9875\u9762\u53ef\u89c1\u6027API\uff0c\u770b\u770b\u80fd\u4e0d\u80fd\u6e10\u8fdb\u589e\u52a0\u4e0b\u7528\u6237\u4f53\u9a8c\u7b49\u3002<\/p>\n<h3>\u516d\u3001\u7ed3\u8bed<\/h3>\n<p>\u8111\u7ec6\u80de\u4e0d\u591f\u7528\u4e86\uff0c\u80af\u5b9a\u8fd8\u6709\u5f88\u591a\u73b0\u6709\u7684\u53ef\u4ee5\u5e94\u7528\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u7684idea\u7684\uff0c\u4e00\u65f6\u60f3\u4e0d\u51fa\u2014\u2014\u6069\uff0c\u6bd4\u65b9\u8bf4\uff0c\u6bcf\u6b21\u7528\u6237\u5207\u6362\u5230\u4f60\u8fd9\u4e2a\u9875\u9762\u4e0a\u7684\u65f6\u5019\uff0clogo\u6296\u4e00\u4e0b\uff0c\u6216\u9875\u9762\u4e00\u9053\u4eae\u5149\u95ea\u8fc7<img decoding=\"async\" src=\"https:\/\/mat1.gtimg.com\/www\/mb\/images\/face\/4.gif\" \/>\uff0c\u540e\u8005\u6b22\u8fce\u8bed\u4e4b\u7c7b\u2026\u2026\u603b\u4e4b\uff0c\u662f\u4e2a\u5f88\u6709\u7528\u5f88\u6709\u8da3\u7684API.<\/p>\n<p>\u6b64API\u652f\u6301\u65e5\u8d8b\u7a33\u5b9a\uff0c\u4e0d\u4f1a\u6709\u88ab\u53bb\u9664\u7684\u53ef\u80fd\uff0c\u56e0\u6b64\uff0c\u5927\u4f19\u513f\u53ef\u4ee5\u653e\u5fc3\u5927\u80c6\u5c1d\u8bd5\u4e4b\u2026\u2026\u56e0\u4e3a\u662f\u65b0\u4e1c\u897f\uff0c\u60a8\u7684\u4efb\u4f55\u5c0f\u5c0fidea\u90fd\u4f1a\u662f\u9996\u521b\uff0c\u9886\u5148\u7684\u521b\u9020\u8005\u2014\u2014\u5f00\u52a8\u4f60\u7684\u8111\u7b4b\uff0c\u53d1\u6325\u4f60\u7684\u521b\u9020\u6027\u601d\u7ef4\uff0c\u8ba9\u6211\u4eec\u7684\u7f51\u9875\u66f4\u52a0\u751f\u52a8\u591a\u5f69\u5427<img decoding=\"async\" src=\"https:\/\/mat1.gtimg.com\/www\/mb\/images\/face\/99.gif\" \/>\uff01<\/p>\n<p>\u96c6\u601d\u5e7f\u76ca\uff0c\u6b22\u8fce\u8865\u5145\uff01\u5982\u6709\u9519\u8bef\uff0c\u6b22\u8fce\u7ea0\u6b63\uff01<\/p>\n<p><strong>\u53c2\u8003\u6587\u7ae0\uff1a<\/strong><\/p>\n<ul>\n<li><a href=\"http:\/\/www.samdutton.com\/pageVisibility\/\">Using the Page Visibility API<\/a><\/li>\n<li>Nicholas C. Zakas\uff1a<a href=\"http:\/\/www.nczonline.net\/blog\/2011\/08\/09\/introduction-to-the-page-visibility-api\/\">Introduction to the Page Visibility API<\/a><\/li>\n<li><a href=\"http:\/\/ie.microsoft.com\/testdrive\/Performance\/PageVisibility\/Default.html\">Page Visibility API <\/a><\/li>\n<li><a href=\"http:\/\/my.opera.com\/ODIN\/blog\/page-visibility-api-support-in-opera-12-10\">Page Visibility API Support in Opera 12.10<\/a><\/li>\n<li>David Walsh\uff1a<a href=\"http:\/\/davidwalsh.name\/page-visibility\">Page Visibility API<\/a><\/li>\n<li><a href=\"https:\/\/developers.google.com\/chrome\/whitepapers\/pagevisibility\">Using the Page Visibility API<\/a><\/li>\n<\/ul>\n<p>\u672c\u6587\u4e3a\u539f\u521b\u6587\u7ae0\uff0c\u8f6c\u8f7d\u8bf7\u6ce8\u660e\u6765\u81ea<a href=\"https:\/\/www.zhangxinxu.com\/\">\u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b<\/a>[<a href=\"https:\/\/www.zhangxinxu.com\/\">https:\/\/www.zhangxinxu.com<\/a>]<br \/>\n\u672c\u6587\u5730\u5740\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=2790\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=2790<\/a><\/p>\n<p>\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u679c\u68c0\u6d4b\u9875\u9762\u5207\u9875\uff0c\u6700\u5c0f\u5316\uff0c\u5173\u95ed\uff0c\u5207\u6362\u9009\u9879\u5361\uff0c\u53ef\u4ee5\u4f7f\u7528visibilitychange\u4e8b\u4ef6\uff0c\u4f7f\u7528visibilityState\u5c5e\u6027\u503c\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[215,52,761,1610,1611,762],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/2790"}],"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=2790"}],"version-history":[{"count":0,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/2790\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=2790"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=2790"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=2790"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}