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。
<!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>