主要用到了
oncontextmenu事件，在oncontextmenu事件中使用return false屏蔽掉原生右键菜单，再使用event获取鼠标的坐标位置，设置自定义菜单的位置。
下面是具体实现的代码，参考链接http://www.runoob.com/jsref/event-oncontextmenu.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<ul class="menu" id="menu">
<li><a href="###">复制</a></li>
<li><a href="###">粘贴</a></li>
<li><a href="###">剪切</a></li>
<li><a href="###">刷新</a></li>
</ul>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
.menu {
100px;
border: 1px solid #ccc;
position: absolute;
box-shadow: 0 0 5px rgba(0,0,0,.2);
padding: 10px 0;
transition: all .1s ease;
}
.menu li {
list-style: none;
100%;
}
.menu li a {
display: inline-block;
text-decoration: none;
color: #555;
100%;
padding: 10px 0;
text-align: center;
}
.menu li:first-of-type{
border-radius: 5px 5px 0 0;
}
.menu li a:hover,
.menu li a:active {
background: #eee;
color: #0AAF88;
}
</style>
<script>
window.onload = function() {
//获取可视区宽度
var winWidth = function() {
return document.documentElement.clientWidth || document.body.clientWidth;
}
//获取可视区高度
var winHeight = function() {
return document.documentElement.clientHeight || document.body.clientHeight;
}
var menu = document.getElementById('menu');
menu.style.display = 'none';
document.addEventListener('click', function() {
menu.style.display = 'none';
})
menu.addEventListener('click', function(event) {
var event = event || window.event;
event.cancelBubble = true;
})
//右键菜单
document.oncontextmenu = function(event) {
var event = event || window.event;
menu.style.display = 'block';
var l, t;
l = event.clientX;
t = event.clientY;
if( l >= (winWidth() - menu.offsetWidth) ) {
l = winWidth() - menu.offsetWidth;
} else {
l = l
}
if(t > winHeight() - menu.offsetHeight ) {
t = winHeight() - menu.offsetHeight;
} else {
t = t;
}
menu.style.left = l + 'px';
menu.style.top = t + 'px';
return false;
}
}
</script>
</body>
</html>