作业描述：使用JS实现一个选项卡效果
网页代码
使用Trae CN工具编写代码，如下：
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<style>
*{
margin: 0;
padding: 0;
box-sizing: border-box;
}
html,body{
height: 100%;
width: 100%;
}
html{
font-size: 10px;
}
.tab{
width: 40rem;
height: 30rem;
border:solid 1px #000 ;
}
.tab-title{
width: 100%;
height:5 rem;
display: flex;
justify-content: space-between;
align-items: center;
background-color: #ccc;
color:#fff;
}
.tt{
flex:1;
height: 5rem;
background-color: rgba(123, 232, 176, 0.7);
text-align: center;
line-height: 5rem;
font-size: 1.8rem;
}
.tt.active,
.tt:hover{
background-color: rgb(243, 223, 188);
color: blueviolet;
}
.table-content{
width: 100%;
height: 25rem;
background-color: #e87676;
position: relative;
}
.tc{
width: 100%;
height: 25rem;
text-align: center;
background-color: #c03535;
font-size: 1.8rem;
display: none;
position: absolute;
}
.tc.active{
display: block;
}
.tc:nth-of-type(1){
background-color: rgb(34, 107, 253);
}
.tc:nth-of-type(2){
background-color: darkorange;
}
.tc:nth-of-type(3){
background-color: darkslateblue;
}
</style>
<body>
<div class="tab">
<div class="tab-title">
<div class="tt active">标题1</div>
<div class="tt">标题2</div>
<div class="tt">标题3</div>
</div>
<div class="table-content">
<div class="tc active">内容1</div>
<div class="tc">内容2</div>
<div class="tc">内容3</div>
</div>
</div>
<script>
let tts=document.getElementsByClassName("tt")
console.log(tts)
for(let i=0;i<tts.length;i++){
console.log(tts[i]);
tts[i].onmouseenter=function(){
for(let j=0;j<tts.length;j++){
tts[j].classList="tt"
}
tts[i].classList="tt active"
let tcs=document.getElementsByClassName("tc")
for(let k=0;k<tcs.length;k++){
tcs[k].classList="tc"
}
tcs[i].classList="tc active"
}
}
</script>
</body>
</html>
屏幕截图 2025-04-10 173740.png
