一、vue如何实现？
代码：
<!DOCTYPE html>
<html lang="en"> <head>
<meta charset="UTF-8">
<title>Title</title>
<script src="https://cdn.bootcss.com/vue/2.4.2/vue.min.js"></script>
<style type="text/css">
li{
list-style: none;
float: left;
margin-left: 5px;
background: yellow;
padding: 1px;
border-radius: 3px;
border:1px solid #999;
}
.active{
color:red;
}
</style>
</head> <body>
<div id="example">
<ul>
<li v-bind:class=" activeClass==index ? 'active' : '' " v-for="(item,index) in list" @click="getItem(index)">{{item.name}}</li>
</ul>
</div>
<script>
var example1 = new Vue({
el: '#example',
data: {
activeClass: -1,
list:[
{"typeId":"1","name":"按钮一","number":"50"},
{"typeId":"2","name":"按钮二","number":"50"},
{"typeId":"3","name":"按钮三","number":"50"},
{"typeId":"4","name":"按钮四","number":"50"},
{"typeId":"5","name":"按钮五","number":"50"},
{"typeId":"6","name":"按钮六","number":"50"},
{"typeId":"7","name":"按钮七","number":"50"},
{"typeId":"8","name":"按钮八","number":"80"},
],
},
watch: { },
methods: {
getItem: function (index) {
this.activeClass = index;
}
}
})
</script>
</body> </html>
效果图：
二、jq如何实现？
代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>刘晓慧</title>
<script src="https://cdn.bootcss.com/jquery/1.10.2/jquery.min.js"></script>
<style type="text/css">
li{
list-style: none;
float: left;
margin-left: 5px;
background: yellow;
padding: 1px;
border-radius: 3px;
border:1px solid #999;
}
.active{
color:red;
}
</style>
</head>
<body>
<div id="example">
<ul>
<li>按钮一</li>
<li>按钮二</li>
<li>按钮三</li>
<li>按钮四</li>
<li>按钮五</li>
<li>按钮六</li>
<li>按钮七</li>
<li>按钮八</li>
</ul>
</div>
</body>
</html>
<script type="text/javascript">
$("li").click(function(){
$("li").removeClass("active");
$(this).addClass("active");
})
</script>
效果图：同上
三、原生js如何实现？
代码：
<!DOCTYPE html>
<html lang="en"> <head>
<meta charset="UTF-8">
<title>Title</title>
<style type="text/css">
li{
list-style: none;
float: left;
margin-left: 5px;
background: yellow;
padding: 1px;
border-radius: 3px;
border:1px solid #999;
}
.active{
color:red;
}
</style>
</head> <body>
<div id="example">
<ul>
<li>按钮一</li>
<li>按钮二</li>
<li>按钮三</li>
<li>按钮四</li>
<li>按钮五</li>
<li>按钮六</li>
<li>按钮七</li>
<li>按钮八</li>
</ul>
</div>
</body> </html>
<script type="text/javascript">
var buttons=document.getElementsByTagName("li");
var l=buttons.length;
for(var i=0;i<l;i++){
buttons[i].onclick=function(){
for(var j=0;j<l;j++){
if(this==buttons[j]){
this.className="active";
}else{
buttons[j].className="";
} }
}
}
</script>
效果图：同上
代码2（hwt）：
<!DOCTYPE html>
<html>
<head>
<title>练习</title>
<meta name="keywords" content="keyword1,keyword2,keyword3">
<meta name="description" content="this is my page">
<meta name="content-type" content="text/html; charset=UTF-8">
</head>
<style>
.btn{background-color:yellow;}
</style>
<script type="text/javascript">
function change(obj){
var btn = document.querySelectorAll('.btn');
for(var i=0;i<btn.length;i++){
btn[i].style.color = "black";
}
document.getElementById(obj).style.color = "red";
}
</script>
<body>
<button type="button" value="" class="btn" onclick="change('a')" id="a">按钮一</button>
<button type="button" value="" class="btn" onclick="change('b')" id="b">按钮二</button>
<button type="button" value="" class="btn" onclick="change('c')" id="c">按钮三</button>
<button type="button" value="" class="btn" onclick="change('d')" id="d">按钮四</button>
<button type="button" value="" class="btn" onclick="change('e')" id="e">按钮五</button>
<button type="button" value="" class="btn" onclick="change('f')" id="f">按钮六</button>
<button type="button" value="" class="btn" onclick="change('g')" id="g">按钮七</button>
<button type="button" value="" class="btn" onclick="change('h')" id="h">按钮八</button>
</body>
</html>