자바스크립트와 jQuery 비교
예제. 탭을 클릭했을 때 포커스를 변경하는 예제
JavaScript
<html>
<head>
<script type="text/javascript">
function addEvent(target, eventType,eventHandler, useCapture) {
if (target.addEventListener) { // W3C DOM
target.addEventListener(eventType,eventHandler,useCapture?useCapture:false);
} else if (target.attachEvent) { // IE DOM
var r = target.attachEvent("on"+eventType, eventHandler);
}
}
function clickHandler(event) {
var nav = document.getElementById('navigation');
for(var i = 0; i < nav.childNodes.length; i++) {
var child = nav.childNodes[i];
if(child.nodeType==3)
continue;
child.className = '';
}
event.target.className = 'selected';
}
addEvent(window, 'load', function(eventObj) {
var nav = document.getElementById('navigation');
for(var i = 0; i < nav.childNodes.length; i++) {
var child = nav.childNodes[i];
if(child.nodeType==3)
continue;
addEvent(child, 'click', clickHandler);
}
})
</script>
<style type="text/css">
#navigation li {
list-style:none;
float:left;
padding:5px;
}
#navigation {
cursor:pointer;
}
#navigation .selected {
background-color:red;
color:white;
}
</style>
</head>
<body>
<ul id="navigation">
<li>HTML</li>
<li>CSS</li>
<li>javascript</li>
<li class="selected">jQuery</li>
<li>PHP</li>
<li>mysql</li>
</ul>
</body>
</html>
jQuery
<html>
<head>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script>
<script type="text/javascript">
$('#navigation li').live('click', function() {
$('#navigation li').removeClass('selected');
$(this).addClass('selected');
})
</script>
<style type="text/css">
#navigation li {
list-style:none;
float:left;
padding:5px;
}
#navigation {
cursor:pointer;
}
#navigation .selected {
background-color:red;
color:white;
}
</style>
</head>
<body>
<ul id="navigation">
<li>HTML</li>
<li>CSS</li>
<li>javascript</li>
<li class="selected">jQuery</li>
<li>PHP</li>
<li>mysql</li>
</ul>
</body>
</html>
