zoukankan html css js c++ java

mouseent和mouseover的区别

使用mouseover会产生冒泡事件结合onmouseout一起使用

控制台里面的小盒子也会触发大盒子的事件这叫冒泡事件，所以使用mouseover会产生冒泡事件

<!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>
        #box1{
             300px;
            height: 300px;
            background-color: brown;
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translateY(-50%) translateX(-50%);
        }
        #box2{
             100px;
            height: 100px;
            background-color: blueviolet;
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translateY(-50%) translateX(-50%);
        }
    </style>
</head>
<body>
    <div id="box1">
        <div id="box2"></div>  
    </div>
    <script>
        box1.addEventListener("mouseover",function(){
            console.log("被触发");   
        });
    </script>
</body>
</html>

mouseent鼠标经过事件不会产生冒泡事件搭配mouseleave鼠标离开事件使用

鼠标经过小盒子时不会被触发

<!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>
        #box1{
             300px;
            height: 300px;
            background-color: brown;
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translateY(-50%) translateX(-50%);
        }
        #box2{
             100px;
            height: 100px;
            background-color: blueviolet;
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translateY(-50%) translateX(-50%);
        }
    </style>
</head>
<body>
    <div id="box1">
        <div id="box2"></div>  
    </div>
    <script>
        box1.addEventListener("mouseenter",function(){
            console.log("被触发");   
        });
    </script>
</body>
</html>

查看全文

相关阅读:
菜单展开效果
 css3 实现运动动画圆与椭圆
 css3 翻起页脚
 css3 实现loading效果
 css3
jquery/原生js/css3 实现瀑布流以及下拉底部加载
 JSON
js中变量声明提前
 Object.prototype.toString.call(obj)检测数据类型
 call,apply,bind与es6的数组扩展运算符...

原文地址：https://www.cnblogs.com/niuyaomin/p/12687120.html