<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>的撒的撒</title>
<script src="https://cdn.jsdelivr.net/npm/vue"></script>
<style type="text/css">
.show{
width: 90px;
height: 90px;
background-color: red;
}
.show{
display: block;
}
.hide{
display: none;
}
</style>
</head>
<body>
<button type='button' id='btn'>隐藏</button>
<div id="demo" class="show">
</div>
<script type="text/javascript">
var btn = document.getElementById('btn');
var div = document.getElementById('demo');
btn.onclick = function(){
if(this.innerHTML === '隐藏'){
this.innerHTML = '显示';
div.className = 'hide';
}else{
this.innerHTML = '隐藏';
div.className = 'show';
}
}
</script>
</body>
</html>
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