js 右键弹出自定义菜单

news2024/11/18 12:27:38

演示

在这里插入图片描述

<!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>
        *{
            margin: 0;
            padding:0;
        }
        li{
            list-style: none;
            height: 30px;
            width: 80px;
            text-align: center;
            line-height: 30px;
            border-top: 1px solid rgb(187, 181, 181);
        }
        .mydiv{
            margin:20px auto;
            width: 400px;
            height: 300px;
            background-color: rgb(170, 238, 232);
            position: relative;
        }
        .mydiv ul{
            width: 80px;
            height: 150px;
            background-color: rgb(206, 195, 247);
            position: absolute;
            display: none;
        }
    </style>
</head>
<body>
<div class="mydiv">
    <ul class="myul">
        <li>菜单1</li>
        <li>菜单2</li>
        <li>菜单3</li>
        <li>菜单4</li>
        <li>菜单5</li>
    </ul>
</div>

<script>
    let mydiv=document.querySelector('.mydiv');
    let myul=document.querySelector('.myul');

    mydiv.addEventListener('contextmenu',fn);
    //contextmenu右键
    function fn(e){
        e.preventDefault();//preventDefault()阻止默认事件（这里阻止了默认菜单）
        myul.style.display='block';//点击右键菜单显示出来
        let X=e.pageX - this.offsetLeft;
        let Y=e.pageY - this.offsetTop;
        myul.style.left=X+'px';
        myul.style.top=Y+'px';
    }
    window.onclick=function(event){
        if(event.target.tagName=='li'){
            //如果点击到 LI（菜单）就停止执行return之后的代码，菜单就不会隐藏
            return;
        }
        myul.style.display='none'
        //如果点击菜单外的任意位置，菜单被隐藏
    }
</script>
</body>
</html>