1.有红，黄，蓝三个按钮，以及一个矩形框，点击不同的按钮，矩形框的颜色会被切换为指定的颜色
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<title>点击变色</title>
<script src="Vue/vue.js"></script>
<style>
.d1{
width: 150px;
height: 150px;
background-color: red;
}
.d2{
width: 150px;
height: 150px;
background-color: blue;
}
.d3{
width: 150px;
height: 150px;
background-color: yellow;
}
</style>
</head>
<body>
<div id="d0">
<p @click="f1" id="d1">红色</p>
<p @click="f2" id="d2">蓝色</p>
<p @click="f3" id="d3">黄色</p>
</div>
<div id="d4" :class="c1" >
</div>
<script>
let app = new Vue({
el:'#d4',
data:{
c1:'d1',
},
});
let color = new Vue({
el:'#d0',
data:{
d1:'d1',
d2:'d2',
d3:'d3'
},
methods:{
f1(){
app.c1 = 'd1'
},
f2(){
app.c1 = 'd2'
},
f3(){
app.c1 = 'd3'
},
}
})
</script>
</body>
</html>2.有一个矩形框，点击框本身，记录点击次数，会随着点击次数的增加依次变换颜色
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<title>点击变色</title>
<script src="Vue/vue.js"></script>
<style>
.d1{
width: 150px;
height: 150px;
background-color: red;
}
.d2{
width: 150px;
height: 150px;
background-color: blue;
}
.d3{
width: 150px;
height: 150px;
background-color: yellow;
}
</style>
</head>
<body>
<div>
<p id="d1">{{ count }}</p>
</div>
<div :class="c1" id="d2" @click="f2" id="d2"></div>
<script>
let app = new Vue({
el:'#d1',
data:{
cl:'d1',
c2:'d2',
c3:'d3',
count:1
},
});
let app1 = new Vue({
el:'#d2',
data:{
c1:'d1',
count1:0
},
methods:{
f2(){
app.count = app.count + 1;
if(app.count == 3){
app1.c1='d2'
}
if(app.count == 5){
app1.c1 = 'd3'
}
if(app.count == 7){
app1.c1 = 'd1';
app.count = 1
}
}
}
})
</script>
</body>
</html>原文：https://www.cnblogs.com/whkzm/p/12051705.html