<!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>改变颜色</title>
<script src=”/vue.js”></script>
<style>
.divClass{
border: 1px solid red;
width: 200px;
height: 200px;
}
.divClass2{
background-color: rgb(0, 0, 0);
}
.divClass3{
background-color: goldenrod;
}
</style>
</head>
<body>
<div id=”app”>
<div :class=”{divClass:isDivClass, divClass2:isDivClassX, divClass2:isDivClassY}”>
<h1 :style=”color”>看颜色</h1>
</div>
<button @click=”change”>点击切换 背景</button>
</div>
<script>
new Vue({
el:’#app’,
data(){ // data以后尽量都这么写
return{
isDivClass:true,
isDivClassX:true, // 对象的绑定
isDivClassY:false,
isChange:true,
color:’color:yellow’
}
},
methods: {
change(){
if( this.isChange ){
this.isDivClassY=!this.isDivClassY;
this.color = ‘color:goldenrod’;
this.isChange==false
}else{
this.isDivClassX=!this.isDivClassX;
this.color = ‘color:yellowgreen’;
this.isChange==true
}
}
}
})
</script>
</body>
</html>