08 千千音乐盒实现全选和反选
<!DOCTYPE html>
<html>
<head>
<title></title>
<style type="text/css">
*{
padding: 0;
margin: 0;
}
#panel{
background-color: #fff;
border: 1px solid #ddd;
border-radius: 4px;
width: 400px;
padding: 20px;
margin: 100px auto;
background-image: url('./image/skin1.jpg');
color: red;
}
.panel-footer{
text-align: center;
}
</style>
</head>
<body>
<div id="panel">
<div class="panpel-title">
<h3>千千音乐盒</h3>
<hr>
</div>
<div class="panel-content">
<input type="checkbox"><a href="https://www.kugou.com/song/#hash=9C4F738916585D0039CB811AC131BFF8&album_id=560257">漂洋过海来看你</a><br>
<input type="checkbox"><a href="https://www.kugou.com/song/#hash=E99455F42E5E6D1AC37F8346698FFC28&album_id=557277">一眼万年</a><br>
<input type="checkbox"><a href="https://www.kugou.com/song/#hash=E99455F42E5E6D1AC37F8346698FFC28&album_id=557277">后来</a><br>
<input type="checkbox"><a href="https://www.kugou.com/song/#hash=1AD3D0E7ABB3261A28977E57F59BB1E1&album_id=962530">没那么简单</a><br>
<input type="checkbox"><a href="https://www.kugou.com/song/#hash=1AD3D0E7ABB3261A28977E57F59BB1E1&album_id=962530">如果你要离去</a><br>
</div>
<div class="panel-footer">
<hr>
<button id="allSelect">全选</button>
<button id="cancleSelect">取消选中</button>
<button id="reverseSelect">反选</button>
</div>
</div>
<script type="text/javascript">
//1.获取事件源
function $(id){
return typeof id === 'string' ? document.getElementById(id):null;
}
var inputs = document.getElementsByTagName('input');
console.log($('allSelect'))
//2.全选
$('allSelect').onclick = function(){
for(var i = 0;i < inputs.length;i++){
inputs[i].checked = true;
}
}
//3.取消选中
$('cancleSelect').onclick = function(){
for(var i = 0;i < inputs.length;i++){
inputs[i].checked = false;
}
}
//4.反选
$('reverseSelect').onclick = function(){
for(var i = 0;i < inputs.length;i++){
inputs[i].checked = !inputs[i].checked;
// if(inputs[i].checked){
// inputs[i].checked = false;
// }else{inputs[i].checked=true}
}
}
</script>
</body>
</html>
