面向过程的写法 !DOCTYPE htmlhtml lang="en"head meta charset="UTF-8" meta http-equiv="X-UA-Compatible" content="IE=edge" meta name="viewport" content="width=device-width, initial-scale=1.0" titleDocument/title style *{ padding: 0; mar
面向过程的写法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
*{
padding: 0;
margin: 0;
}
div{
width: 500px;
border: 1px solid red;
}
ul{
overflow: hidden;
}
ul>li{
list-style: none;
float: left;
width: 50px;
text-align: center;
}
div>div{
height: 300px;
background-color: pink;
text-align: center;
font-size: 50px;
}
#lastBox{
display: none;
}
.selected{
background-color: orange;
}
</style>
</head>
<body>
<div>
<ul>
<li id="first" class="selected">1</li>
<li id="last">2</li>
</ul>
<div id="firstBox">11111</div>
<div id="lastBox">222222</div>
</div>
<script>
var lis = document.querySelectorAll('ul>li')
var content = document.querySelectorAll('div>div')
//藏值 通过属性来保存对应的值 通过对应的对象来藏
//加所有li添加点击事件
for(var i=0;i<lis.length;i++){
// lis[i].setAttribute('data-index',i)
lis[i].index = i
lis[i].onclick = function(){
//排他思想 先将所有的全部设置一个值 然后再给自己设置一个值
for(var j=0;j<lis.length;j++){
lis[j].className = ""
}
this.className = "selected"
//排他
//先将其他的都隐藏 再给自己显示
for(var j=0;j<content.length;j++){
content[j].style.display = "none"
}
// document.getElementById(this.id+'Box').style.display = 'block'
// content[this.getAttribute('data-index')].style.display = 'block'
content[this.index].style.display = 'block'
}
}
</script>
</body>
</html>
面向对象的写法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
*{
margin: 0;
padding: 0;
}
#box{
width: 400px;
height: 400px;
border: 2px solid pink;
margin: 0 auto;
}
ul{
display: flex;
margin: 0 auto;
width: 400px;
position: relative;
}
ul>li{
list-style: none;
width: 100px;
height: 50px;
font-size: 40px;
text-align: center;
border: 1px solid white;
background-color: yellow;
}
ul .showli{
background-color: orange;
}
#box div{
width: 400px;
height: 350px;
position: absolute;
display: none;
}
#box .show{
display: block;
background-color: rgb(0, 183, 255);
font-size: 80px;
text-align: center;
}
</style>
</head>
<body>
<div id="box">
<ul>
<li class="showli">1</li>
<li>2</li>
<li>3</li>
<li>4</li>
</ul>
<div class="show">1</div>
<div>2</div>
<div>3</div>
<div>4</div>
</div>
<script>
//用面向对象的思维写tab栏切换
//属性：选项框，选项框对应要切换的页面
class Tab{
constructor(ele){
this.box = document.getElementById(ele);
this.lis = this.box.querySelectorAll('ul > li');
this.divs = this.box.querySelectorAll('div');
}
change()
{
// console.log(this.box);
// console.log(this.lis);
// console.log(this.divs);
for(var i = 0; i < this.lis.length; i++)
{
//保存当前this指向
var _this = this;
//保存每一个li的下标，便于切换指定div
this.lis[i].index = i;
//每一个li添加点击事件
this.lis[i].onclick = function()
{
//排他，清空所有li与盒子的类名
for(var j = 0; j < _this.lis.length; j++)
{
_this.lis[j].className = "";
_this.divs[j].className = "";
}
//单独设置点击的li类名，让其样式和其余未被点击的li不同
this.className = "showli";
//检查当前li的下标是否成功保存
// console.log(this.index);
//让li对应的div显示出来
_this.divs[this.index].className = "show";
}
}
}
}
var tab = new Tab("box");
tab.change();
</script>
</body>
</html>
到此这篇关于JS实现Tab栏切换的两种方式的文章就介绍到这了,更多相关JS Tab栏切换内容请搜索自由互联以前的文章或继续浏览下面的相关文章希望大家以后多多支持自由互联！