{"id":32319,"date":"2024-11-25T17:17:18","date_gmt":"2024-11-25T09:17:18","guid":{"rendered":"https:\/\/fwq.ai\/blog\/32319\/"},"modified":"2024-11-25T17:17:18","modified_gmt":"2024-11-25T09:17:18","slug":"%e6%8e%a2%e7%b4%a2html5%e9%a1%b5%e9%9d%a2%e5%8f%af%e8%a7%81%e6%80%a7api","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/32319\/","title":{"rendered":"\u63a2\u7d22HTML5\u9875\u9762\u53ef\u89c1\u6027API"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/000\/887\/227\/169322238762353.jpg\" class=\"aligncenter\" title=\"\u63a2\u7d22HTML5\u9875\u9762\u53ef\u89c1\u6027API\u63d2\u56fe\" alt=\"\u63a2\u7d22HTML5\u9875\u9762\u53ef\u89c1\u6027API\u63d2\u56fe\" \/><\/p>\n<p>\u65e9\u4e9b\u65f6\u5019\uff0c\u6211\u4eec\u7684\u6d4f\u89c8\u5668\u4e0d\u5177\u6709\u9009\u9879\u5361\u5f0f\u6d4f\u89c8\u529f\u80fd\uff0c\u4f46\u4eca\u5929\uff0c\u5f53\u60a8\u67e5\u770b\u6240\u6709\u53ef\u7528\u7684\u6d4f\u89c8\u5668\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u6240\u6709\u6d4f\u89c8\u5668\u90fd\u63d0\u4f9b\u8be5\u529f\u80fd\u3002\u4f5c\u4e3a\u4e00\u540d\u7a0b\u5e8f\u5458\uff0c\u6211\u901a\u5e38\u4e00\u6b21\u6253\u5f00 10-15 \u4e2a\u9009\u9879\u5361\uff0c\u6709\u65f6\u8fd9\u4e2a\u6570\u5b57\u4f1a\u8d85\u8fc7 25-30 \u4e2a\u3002<\/p>\n<\/p>\n<h2>\u4e3a\u4ec0\u4e48\u4f7f\u7528\u6b64 API\uff1f<\/h2>\n<\/p>\n<p>\u4e4b\u524d\uff0c\u65e0\u6cd5\u786e\u5b9a\u54ea\u4e2a\u9009\u9879\u5361\u5904\u4e8e\u6d3b\u52a8\u72b6\u6001\u3001\u54ea\u4e2a\u9009\u9879\u5361\u5904\u4e8e\u6d3b\u52a8\u72b6\u6001\uff0c\u4f46\u501f\u52a9 HTML5 Visibility API\uff0c\u6211\u4eec\u53ef\u4ee5\u68c0\u6d4b\u8bbf\u95ee\u8005\u662f\u5426\u6b63\u5728\u67e5\u770b\u6211\u4eec\u7684\u7f51\u9875\u3002 <\/p>\n<p>\u5728\u672c\u6559\u7a0b\u4e2d\uff0c\u6211\u4eec\u5c06\u4e86\u89e3\u5982\u4f55\u5904\u7406 HTML5 Visibility API \u4ee5\u53ca\u4e00\u4e2a\u7b80\u5355\u7684\u6f14\u793a\u6765\u53d1\u73b0\u9875\u9762\u7684\u72b6\u6001\u3002\u5728\u6b64\u6f14\u793a\u4e2d\uff0c\u6211\u4eec\u5c06\u6839\u636e\u9875\u9762\u53ef\u89c1\u6027\u72b6\u6001\u66f4\u6539\u6587\u6863\u6807\u9898\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<\/p>\n<h2>\u68c0\u67e5\u9875\u9762\u7684\u53ef\u89c1\u6027\u72b6\u6001<\/h2>\n<\/p>\n<p>\u968f\u7740\u6b64 API \u7684\u63a8\u51fa\uff0c\u6211\u4eec\u8fce\u6765\u4e86\u4e24\u4e2a\u65b0\u7684\u6587\u6863\u5c5e\u6027\uff0c\u5b83\u4eec\u5177\u6709\u4e24\u79cd\u4e0d\u540c\u7684\u529f\u80fd\u3002\u7b2c\u4e00\u4e2a\u662f document.visibilityState\uff0c\u7b2c\u4e8c\u4e2a\u662f document.hidden\u3002<\/p>\n<\/p>\n<p>document.visibilityState \u5305\u542b\u56db\u4e2a\u4e0d\u540c\u7684\u503c\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<\/p>\n<ul>\n<li> <b>\u9690\u85cf\uff1a<\/b>\u9875\u9762\u5728\u4efb\u4f55\u5c4f\u5e55\u4e0a\u90fd\u4e0d\u53ef\u89c1<\/li>\n<li> <b>\u9884\u6e32\u67d3\uff1a<\/b>\u9875\u9762\u5728\u5c4f\u5e55\u5916\u52a0\u8f7d\u5e76\u4e14\u5bf9\u7528\u6237\u4e0d\u53ef\u89c1\n<\/p>\n<\/li>\n<li> <b>\u53ef\u89c1\uff1a<\/b>\u9875\u9762\u53ef\u89c1\n<\/p>\n<\/li>\n<li> <b>\u5df2\u5378\u8f7d\uff1a<\/b>\u9875\u9762\u5373\u5c06\u5378\u8f7d\uff08\u7528\u6237\u6b63\u5728\u79bb\u5f00\u5f53\u524d\u9875\u9762\uff09\n<\/p>\n<\/li>\n<\/ul>\n<p>document.hidden \u662f\u5e03\u5c14\u5c5e\u6027\uff0c\u5982\u679c\u9875\u9762\u53ef\u89c1\u5219\u8bbe\u7f6e\u4e3a false\uff0c\u5982\u679c\u9875\u9762\u9690\u85cf\u5219\u8bbe\u7f6e\u4e3a true\u3002<\/p>\n<\/p>\n<blockquote><p>\n  \u73b0\u5728\uff0c\u5f53\u6211\u4eec\u7684\u7f51\u7ad9\u5bf9\u7528\u6237\u9690\u85cf\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u63a7\u5236\u7f51\u7ad9\u7684\u884c\u4e3a\u65b9\u5f0f\u3002\n<\/p><\/blockquote>\n<p>\u6211\u4eec\u7acb\u523b\u5c31\u77e5\u9053\u4e86\u6211\u4eec\u7684\u53ef\u7528\u6027\u5c5e\u6027\uff0c\u4f46\u73b0\u5728\u662f\u65f6\u5019\u4fa6\u542c\u8be5\u4e8b\u4ef6\u4e86\uff0c\u4ee5\u4fbf\u6211\u4eec\u53ef\u4ee5\u6536\u5230\u6709\u5173\u9875\u9762\u53ef\u89c1\u6027\u7684\u65b0\u60c5\u51b5\u7684\u901a\u77e5\u3002\u8fd9\u662f\u901a\u8fc7 visibilitychange \u4e8b\u4ef6\u5b8c\u6210\u7684\u3002\u6211\u4eec\u5c06\u770b\u5230\u6709\u5173\u5982\u4f55\u5904\u7406\u6b64\u4e8b\u4ef6\u7684\u5feb\u901f\u6f14\u793a\u3002<\/p>\n<pre>document.addEventListener('visibilitychange', function(event) {\n  if (!document.hidden) {\n    \/\/ The page is visible.\n  } else {\n   \/\/ The page is hidden. \n  }\n});\n<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u6b64\u4ee3\u7801\u53ea\u662f\u5229\u7528\u6b64\u4e8b\u4ef6\u5e76\u53d1\u73b0\u7f51\u9875\u5f53\u524d\u72b6\u6001\u7684\u57fa\u672c\u5b9e\u4f8b\u3002\u4f46\u8981\u8ba9\u60a8\u77e5\u9053\uff0c\u8fd9\u4e9b\u5c5e\u6027\u548c\u65b9\u6cd5\u90fd\u5e94\u8be5\u4f7f\u7528\u4f9b\u5e94\u5546\u524d\u7f00\uff0c\u56e0\u4e3a\u8fd9\u4e9b\u4e8b\u4ef6\u548c\u5c5e\u6027\u5728\u67d0\u4e9b\u6d4f\u89c8\u5668\u4e2d\u662f\u4f9b\u5e94\u5546\u524d\u7f00\u7684\u3002\u73b0\u5728\u6211\u4eec\u5c06\u4ee5\u8de8\u6d4f\u89c8\u5668\u7684\u65b9\u5f0f\u770b\u5230\u76f8\u540c\u7684\u4ee3\u7801\uff1a<\/p>\n<pre>\/\/ Get Browser-Specifc Prefix\nfunction getBrowserPrefix() {\n  \n  \/\/ Check for the unprefixed property.\n  if ('hidden' in document) {\n    return null;\n  }\n\n  \/\/ All the possible prefixes.\n  var browserPrefixes = ['moz', 'ms', 'o', 'webkit'];\n\n  for (var i = 0; i \n&lt;p&gt;\u6211\u4eec\u62e5\u6709\u6240\u6709\u6d4f\u89c8\u5668\u524d\u7f00\u5c5e\u6027\uff0c\u5e76\u4e14\u4e8b\u4ef6\u5df2\u51c6\u5907\u597d\u5e94\u7528\u3002\u73b0\u5728\u6211\u4eec\u5c06\u76f8\u5e94\u5730\u66f4\u6539\u4e4b\u524d\u7684\u4ee3\u7801\u3002&lt;\/p&gt;\n&lt;pre class=\"brush:javascript;toolbal:false;\"&gt;\/\/ Get Browser Prefix\nvar prefix = getBrowserPrefix();\nvar hidden = hiddenProperty(prefix);\nvar visibilityState = visibilityState(prefix);\nvar visibilityEvent = visibilityEvent(prefix);\n\ndocument.addEventListener(visibilityEvent, function(event) {\n  if (!document[hidden]) {\n    \/\/ The page is visible.\n  } else {\n   \/\/ The page is hidden. \n  }\n});\n<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<h2>\u6211\u4eec\u53ef\u4ee5\u5728\u54ea\u91cc\u4f7f\u7528\u6b64 API\uff1f<\/h2>\n<p>\u6211\u4eec\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u6b64 API \u5728\u8bb8\u591a\u4e0d\u540c\u7684\u573a\u666f\u4e2d\u3002<\/p>\n<\/p>\n<ol>\n<li>\u5047\u8bbe\u60a8\u5728\u4eea\u8868\u677f\u4e0a\uff0c\u9875\u9762\u6b63\u5728\u5b9a\u671f\uff08\u4f8b\u5982\u4e24\u5206\u949f\uff09\u8f6e\u8be2\u67d0\u4e9b RSS \u63d0\u8981\u6216 API \u7684\u8be6\u7ec6\u4fe1\u606f\u3002\u56e0\u6b64\uff0c\u5982\u679c\u9875\u9762\u5bf9\u7528\u6237\u4e0d\u53ef\u89c1\uff08\u5373\u7528\u6237\u5b9e\u9645\u4e0a\u5e76\u672a\u67e5\u770b\u9875\u9762\uff09\uff0c\u6211\u4eec\u53ef\u4ee5\u9650\u5236\u5bf9 RSS \u63d0\u8981\u6216 API \u7684\u8c03\u7528\u3002<\/li>\n<li>\u7528\u4e8e\u56fe\u50cf\u6ed1\u5757\u3002\u6211\u4eec\u53ef\u4ee5\u5728\u9875\u9762\u9690\u85cf\u65f6\u9650\u5236\u6ed1\u5757\u56fe\u50cf\u7684\u79fb\u52a8\u3002\n<\/p>\n<\/li>\n<li>\u4ee5\u7c7b\u4f3c\u7684\u65b9\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u4ec5\u5728\u9875\u9762\u5bf9\u7528\u6237\u9690\u85cf\u65f6\u663e\u793a HTML \u901a\u77e5\u3002\n<\/p>\n<\/li>\n<\/ol>\n<p>\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u6211\u4eec\u5df2\u7ecf\u770b\u5230\u4e86\u4f7f\u7528 HTML5 \u9875\u9762\u53ef\u89c1\u6027 API \u7684\u4ee3\u7801\uff0c\u662f\u65f6\u5019\u7acb\u5373\u91c7\u53d6\u4e00\u4e9b\u884c\u52a8\u4e86\u3002<\/p>\n<\/p>\n<h2>\u6f14\u793a<\/h2>\n<ul>\n<li>\u6f14\u793a 1\uff1a\u8be5\u6f14\u793a\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u9875\u9762\u53ef\u89c1\u6027 API \u6765\u66f4\u6539\u9875\u9762\u6807\u9898\u3002\u67e5\u770b\u6f14\u793a <\/li>\n<li>\u6f14\u793a 2\uff1a\u8be5\u6f14\u793a\u6f14\u793a\u4e86\u5982\u4f55\u5728\u9875\u9762\u5904\u4e8e\u975e\u6d3b\u52a8\u72b6\u6001\u65f6\u9650\u5236\u4ece\u670d\u52a1\u5668\u8f6e\u8be2\u6570\u636e\u3002\n<\/p>\n<\/li>\n<\/ul>\n<p>\u5728\u6b64\u6f14\u793a\u4e2d\uff0c\u6211\u4eec\u5c06\u7814\u7a76\u5982\u4f55\u9650\u5236\u8f6e\u8be2\u670d\u52a1\u5668\u4ee5\u83b7\u53d6\u6700\u65b0\u4fe1\u606f\uff0c\u4f46\u4ec5\u9650\u4e8e\u7528\u6237\u6b63\u5728\u67e5\u770b\u9875\u9762\u65f6\u3002\u6211\u5047\u8bbe jQuery \u5df2\u7ecf\u5305\u542b\u5728\u60a8\u7684\u9875\u9762\u4e2d\u3002\u8fd9\u91cc\u6211\u4eec\u5c06\u4ec5\u589e\u52a0\u8ba1\u6570\uff0c\u4f46\u8fd9\u53ef\u4ee5\u66ff\u6362\u4e3a\u771f\u5b9e\u7684\u670d\u52a1\u5668\u8f6e\u8be2\u3002<\/p>\n<\/p>\n<h3>HTML<\/h3>\n<\/p>\n<pre>&lt;!-- This element will show updated count --&gt;\n&lt;h1 id=\"valueContainer\"&gt;0&lt;\/h1&gt;\n<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<h3>JavaScript<\/h3>\n<\/p>\n<pre>&lt;script type=\"text\/javascript\"&gt;\n    \n\t\/\/ Get Browser Prefix\n\tvar prefix = getBrowserPrefix();\n\tvar hidden = hiddenProperty(prefix);\n\tvar visibilityState = visibilityState(prefix);\n\tvar visibilityEvent = visibilityEvent(prefix);\n\t\n\tvar timer = null;\n\t\n\tfunction increaseVal() {\n\t\tvar newVal = parseInt($('#valueContainer').text()) + parseInt(1);\n\t\t$('#valueContainer').text(newVal);\n\t\tdocument.title = newVal + ': Running'; \n\t\t\n\t\ttimer = setTimeout(function() {\n\t\t\tincreaseVal();\n        }, 1);\n\t}\n\t\n\t\/\/ Visibility Change \n\tdocument.addEventListener(visibilityEvent, function(event) {\n\t\t  if (document[hidden]) {\n\t\t\t  clearTimeout(timer);\n\t\t\t  var val = parseInt($('#valueContainer').text());\n\t\t\t  document.title = val + ': Pause'; \n\t\t  } else {\n\t\t\t  increaseVal();  \n\t\t  }\n\t});\n\t\n\tincreaseVal();\n\t\n&lt;\/script&gt;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 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