js实现右键弹出自定义的菜单
实现的步骤:1、首先阻止右键弹出系统默认的菜单
2、自定义菜单并隐藏
3、点击右键弹出自定义菜单
4、点击桌面除菜单任意位置,菜单隐藏,点击菜单,菜单不隐藏。
<!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>