示例
index.html
:class="['demo',{active: boxBSelected}]"
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Vue Basics</title>
<link
href="https://fonts.googleapis.com/css2?family=Jost:wght@400;700&display=swap"
rel="stylesheet"
/>
<link rel="stylesheet" href="styles.css" />
<script src="https://unpkg.com/vue@3/dist/vue.global.js" defer></script>
<script src="app.js" defer></script>
</head>
<body>
<header>
<h1>Vue Dynamic Styling</h1>
</header>
<section id="styling">
<div class="demo" :class="boxAClasses" @click="boxSelected('A')"></div>
<!-- <div class="demo" :class="{active: boxBSelected}" @click="boxSelected('B')"></div> -->
<div :class="['demo',{active: boxBSelected}]" @click="boxSelected('B')"></div>
<div class="demo" :class="{active: boxCSelected}" @click="boxSelected('C')"></div>
</section>
</body>
</html>
app.js
const app = Vue.createApp({
data(){
return {
boxASelected: false,
boxBSelected: false,
boxCSelected: false,
};
},
computed: {
boxAClasses() {
return {active: this.boxASelected};
}
},
methods:{
boxSelected(box){
if (box === 'A'){
this.boxASelected = !this.boxASelected;
}else if (box === 'B'){
this.boxBSelected = !this.boxBSelected;
}else if (box === 'C'){
this.boxCSelected = !this.boxCSelected;
}
}
}
});
app.mount('#styling');styles.css
* {
box-sizing: border-box;
}
html {
font-family: 'Jost', sans-serif;
}
body {
margin: 0;
}
header {
box-shadow: 0 2px 8px rgba(0, 0, 0, 0.26);
margin: 3rem;
border-radius: 10px;
padding: 1rem;
background-color: #4fc08d;
color: white;
text-align: center;
}
#styling {
box-shadow: 0 2px 8px rgba(0, 0, 0, 0.26);
margin: 3rem;
border-radius: 10px;
padding: 1rem;
text-align: center;
}
.demo {
width: calc(100% - 32px);
height: 100px;
margin: 16px;
border: 2px dashed #ccc;
}
.active {
border-color: red;
background-color: salmon;
}