Simulate the context menu effect code of the windows platform_javascript skills

Code demo:

<meta charset="utf-8"> <title>Untitled Document</title> <style> <!-- body{background: #222; font: 14px 'Microsoft Yahei', Arial;} ul,li{list-style: none;padding:0;margin:0;} a{text-decoration: none;color:#000;} #wrap { width: 800px; height: 550px; border:1px solid #FF9C00; background: #F0E6AF; position:relative; margin: .5em auto; } #wrap ul { background: #eee; border: 1px solid #999; width: 150px; position: absolute; display: none; -moz-box-shadow: 3px 3px 9px #999; -webkit-box-shadow: 3px 3px 9px #999; -o-box-shadow: 3px 3px 9px #999; box-shadow: 3px 3px 9px #999; } #wrap ul li { border-bottom: 1px solid #ddd; line-height: 24px; } #wrap li.no {border-bottom: none;} #wrap ul li a { display: block; padding-left: .5em; } #wrap ul li a:hover { background-color: #FFBD00; } --> </style> <div id="wrap"> <p> </p>Right click to see the effect~<ul id="menu"> <li> <a href=""></a>Undo</li> <li> <a href=""></a>Rework</li> <li> <a href=""></a>Copy</li> <li> <a href=""></a>Paste</li> <li> <a href=""></a>Case conversion</li> <li> <a href=""></a>Enter </li> <li> <a href=""></a>Spell check</li> <li> <a href=""></a>New</li> <li> <a href=""></a>Customized</li> <li> <a href=""></a>Graphics Options</li> <li class="no"> <a href=""></a>Close</li> </ul> </div>
[Ctrl A Select all Note: If you need to introduce external Js, you need to refresh to execute

]

Structure:

Copy code

The code is as follows:

• Cancel


• Redo


• Copy


• Paste


• Case conversion

< li>Enter

• Spell check
• New


• Customized
  
• Graphics Options


• Close

The code is like this:

Copy code

The code is as follows:

function $(id) {
return document.getElementById(id);
};

var EventUnit = {
addHandler: function(element, type, handler) {//添加事件处理程序
if(element.addEventListener) {
element.addEventListener(type, handler) , 거짓);
} else if(element.attachEvent) {
element.attachEvent('on' 유형, 핸들러);
} else {
요소['on' 유형] = 핸들러;
};
},
getEvent: function(event) {
return event ? 이벤트 : window.event;
},
preventDefault: function(event) {//取消事件默认动작
if(event.preventDefault) {
event.preventDefault();
} else {
event.returnValue = false;
};
}
}

EventUnit.addHandler(window, 'load', function() {
var Wrap = $('wrap');
var menu = $(' menu');
var menuStyle = menu.style.display;
var x = Wrap.offsetLeft Wrap.clientWidth, y = Wrap.offsetTop Wrap.clientHeight;
var w = 0, h = 0;
var left = 0, top = 0;

EventUnit.addHandler(wrap, 'contextmenu', function(event) {
event = EventUnit.getEvent(event);
EventUnit. PreventDefault(event);

menu.style.display = 'block';
w = menu.clientWidth;
h = menu.clientHeight; >= w) ? event.clientX - Wrap.offsetLeft : event.clientX - Wrap.offsetLeft - w;
top = (event.clientY h <= y) ? event.clientY - Wrap.offsetTop : 이벤트. clientY - Wrap.offsetTop - h;
menu.style.left = 왼쪽 'px';
menu.style.top = 상단 'px'
}); addHandler(document, 'click', function() {
menu.style.display = menuStyle;
})
});