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javascript实现右键菜单效果方法

小云云

Lepaskan： 2018-03-15 16:46:21

asal

1483 orang telah melayarinya

最近看js高级程序设计的时候突然看到了contextmenu属性，之前在做项目的时候也遇到过，用来阻止鼠标右键弹出，（ps:禁止别人复制），今天突然想了下试着用这个属性来实现以下右键菜单效果。

这里写图片描述

<!DOCTYPE html><html lang="en"><head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link rel="stylesheet" href="css/page/index.css">
    <title>javascript实现右键菜单效果</title>
    <style>
        *{padding:0;margin:0;}
        .menu{display:none;position:fixed;width:125px;}
        .menu ul li{            height:30px;            width:120px;            margin-top:-1px ;            line-height:30px;            border:1px solid #eee; 
            text-align:center;            list-style:none;        }
        .menu ul li:hover{            background:#ccc;            cursor:default;            user-select: none;        }
    </style></head><body>
    <p class="menu">
       <ul>
           <li>导航菜单1</li>
           <li>导航菜单2</li>
           <li>导航菜单3</li>
           <li>导航菜单4</li>
       </ul>
    </p></body></html><script>

    function $(selector){
        return document.querySelectorAll(selector);
    }    var li = $(".menu ul li");    var menu = $(".menu")[0];    //右键菜单单击
    document.oncontextmenu = function(event){
        var ev = event || window.event;        var mX = event.clientX;        var mY = event.clientY;
        menu.style.display = "block";
        menu.style.left = mX + "px";
        menu.style.top = mY + "px";        return false;   //取消window自带的菜单弹出来
    }    //点击页面菜单消失
    document.onclick = function(){
        menu.style.display = "none";
    }    //阻止点击li冒泡
    for(var i = 0, len = li.length; i < len; i++ ){
        li.item(i).onclick = function(event){
            var ev = event || window.event;
            console.log(this.innerText);            if(ev.stopPropagation()){
                ev.stopPropagation();
            }else{
                ev.cancelBubble = false;
            }
        }
    }</script>

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