HTML - doubility-sky/daydayup GitHub Wiki

Hypertext Markup Language (HTML) is the standard markup language for documents designed to be displayed in a web browser. It can be assisted by technologies such as Cascading Style Sheets (CSS) and scripting languages such as JavaScript.

HTML Standard https://html.spec.whatwg.org/multipage/
DOM Standard https://dom.spec.whatwg.org/
web-development

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jagttt's blog 选定一个后端技术然后前端从 jQuery 开始熟悉，很快就能做出很有成就感的东西。

FAQs

判断操作系统

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 <html>
 <head>
 <title>判断操作系统</title>
 <script type="text/javascript">
 function detectOS() { 
 	var platform = navigator.platform.toLowerCase();
 	var userAgent = navigator.userAgent.toLowerCase();
 	// windows
 	if (platform.indexOf("win") > -1) {
 		if (userAgent.indexOf("Windows NT 5.0") > -1 || userAgent.indexOf("Windows 2000") > -1) {
 			return "Win2000";
 		} else if (userAgent.indexOf("Windows NT 5.1") > -1 || userAgent.indexOf("Windows XP") > -1) {
 			return "WinXP";
 		} else if (userAgent.indexOf("Windows NT 5.2") > -1 || userAgent.indexOf("Windows 2003") > -1) {
 			return "Win2003";
 		} else if (userAgent.indexOf("Windows NT 6.0") > -1 || userAgent.indexOf("Windows Vista") > -1) {
 			return "WinVista";
 		} else if (userAgent.indexOf("Windows NT 6.1") > -1 || userAgent.indexOf("Windows 7") > -1) {
 			return "Win7";
 		} else if (userAgent.indexOf("Windows NT 10.0") > -1 || userAgent.indexOf("Windows 10") > -1) {
 			return "Win10";
 		} else {
 			return "Other Windows";
 		}
 	} else if (platform.indexOf("mac") > -1) {
 		return "Mac";
 	} else if (platform.indexOf("x11") > -1) {
 		return "Unix";
 	} else if (platform.indexOf("linux") > -1) {
 		if (userAgent.indexOf("android") > -1) {
 			return "Android";
 		} else {
 			return "Linux";
 		}
 	} else if (platform.indexOf("iphone") > -1) {
 		return "iPhone";
 	} else if (platform.indexOf("ipad") > -1) {
 		return "iPad";
 	} else {
 		return "other. platform:" + platform + " userAgent:" + userAgent;
 	}
 } 
 var os = detectOS()
 document.writeln("您的操作系统是：" + os); 
 alert(os);
 </script>
 </head>
 <body>
 </body>
 </html>