1.穿梭框
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.container {
overflow: hidden;
width: 550px;
margin: 0 auto;
}
.container .left {
float: left;
margin: 0 30px;
}
.container select {
width: 100%;
height: 200px;
}
.container .mid {
padding-top: 70px;
}
</style>
</head>
<body>
<div class="container">
<div class="left">
<h2>吴限的现任女友</h2>
<select id="sel1" multiple>
<option value="1">幂幂</option>
<option value="2">花花</option>
<option value="3">春春</option>
<option value="4">盈盈</option>
<option value="5">红红</option>
</select>
</div>
<div class="left mid">
<p>
<button title="右移动选中的">>></button>
</p>
<p>
<button title="右移动全部">>>|</button>
</p>
<p>
<button title="左移动选中的"><<</button>
</p>
<p>
<button title="左移动全部">|<<</button>
</p>
</div>
<div class="left">
<h2>吴限的前女友</h2>
<select id="sel2" multiple>
<option value="6">坤坤</option>
</select>
</div>
</div>
<script>
var but = document.getElementsByTagName('button');
var sel1 = document.getElementById('sel1');
var sel2 = document.getElementById('sel2');
var op1 = sel1.getElementsByTagName('option');
var op2 = sel2.getElementsByTagName('option');
右移
but[0].onclick = function(){
for(i = 0; i<op1.length;i++){
if(op1[i].selected){
sel2.appendChild(op1[i]);
i = -1;
}
}
}
// 全部右移
but[1].onclick = function(){
while(op1.length>0){
sel2.appendChild(op1[0]);
}
}
// 左移
but[2].onclick = function(){
for(i = 0; i<op2.length;i++){
if(op2[i].selected){
sel1.appendChild(op2[i]);
i = -1;
}
}
}
// 全部左移
but[3].onclick = function(){
while(op2.length>0){
sel1.appendChild(op2[0]);
}
}
</script>
</body>
</html>
2.随机背景色
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.container{
width: 200px;
height: 200px;
border: 2px solid;
cursor: pointer;
background-color: aqua;
}
</style>
</head>
<body>
<p>
点击div，设置div的背景色为随机颜色
</p>
<div class="container">
</div>
<script>
var div = document.getElementsByClassName('container')[0];
div.onclick = function(){
var a = Math.ceil(Math.random()*255);
var b = Math.ceil(Math.random()*255);
var c = Math.ceil(Math.random()*255);
div.style.background = `rgb(${a},${b},${c})`;
}
</script>
</body>
</html>
今天的练习到此结束，谢谢大家