lovecoding
/
W250913


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{
            width: 200px;
            height: 200px;
            background-color: red;
        }
    </style>
</head>
<body>
    <div class="box"></div>
    <script>
        var oBox = document.getElementsByClassName("box")[0];
        // 鼠标移入事件 mouseover 当鼠标移入某一个元素的时候触发
        oBox.onmouseover = function(){
            console.log("鼠标移入了");
        }
        // 鼠标移出事件 mouseout 当鼠标移出某一个元素的时候触发
        oBox.onmouseout = function(){
            console.log("鼠标移出了");
        }
    </script>
</body>
</html>