<body>
<div id="box1"></div>
<script>
var box = my$('box1');
box.onclick = fn;
box.onmouseover = fn;
box.onmouseout = fn;
// 这种写法好处,只定义了一个函数,节约内存
function fn(e) {
switch (e.type) {
case 'click':
console.log('点击');
break;
case 'mouseover' :
console.log('移入');
break;
case 'mouseout' :
console.log('移出');
break;
// 默认处理事件
default:
console.log('点击');
break;
}
}
</script>
</body>
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