Javascript练习：You Move. I Follow You!-优快云博客

本文链接：https://blog.youkuaiyun.com/greencacti/article/details/10164227

接着操练Javascript，想起很多网站鼠标后面会有个烦人的信息跟着，就试试看了。

index.html:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Strict//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Click And Remove</title>
    <script type="text/javascript" src="js/EventUtil.js"></script>
    <script type="text/javascript" src="js/MouseEventUtil.js"></script>
    <script type="text/javascript" src="js/LoadUtil.js"></script>
    
</head>
<body>
    <p>You Move. I Follow You!</p>
</body>
</html>

EventUtil.js:

var EventUtil =
{
	addHandler: function(element, type, handler)
	{
		if(element.addEventListener)
		{
			element.addEventListener(type, handler, false);
		}
		else if(element.attachEvent)
		{
			element.attachEvent("on" + type, handler);
		}
		else
		{
			element["on" + type] = handler;
		}
	},
	
	removeHandler: function(element, type, handler)
	{
		if(element.removeEventListener)
		{
			element.removeEventListener(type, handler, false);
		}
		else if(element.detachEvent)
		{
			element.detachEvent("on" + type, handler);
		}
		else
		{
			element["on" + type] = null;
		}
	},
	
	getEvent: function(event)
	{
		return event ? event : window.event;
	},
	
	getTarget: function(event)
	{
		return event.target ? event.target : event.srcTarget;
	}
};

MouseEventUtil.js:

var MouseEventUtil = 
{
	move: function(event)
	{
		var textToBeMoved = document.getElementsByTagName("p")[0];
		if(textToBeMoved == null)
		{
			return null;
		}
		
		event = EventUtil.getEvent(event);
		clientX = event.clientX;
		clientY = event.clientY;
		
		textToBeMoved.style.position = "absolute";
		textToBeMoved.style.left = clientX + 10 + "px";
		textToBeMoved.style.top = clientY + "px";
	},
};

LoadUtil.js:

var LoadUtil = 
{	
	loadEventHandler: function()
	{
		EventUtil.addHandler(document, "mousemove", MouseEventUtil.move);
	},
};

EventUtil.addHandler(window, "load", LoadUtil.loadEventHandler);