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以下的code，可以动态修改 class, 以及 background-color，或显示/隐藏一个paragraph:
<!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@next" defer></script>
<script src="app.js" defer></script>
</head>
<body>
<header>
<h1>Vue Styling</h1>
</header>
<section id="assignment">
<input type="text" v-model="inputClass" />
<p :class="paraClasses">Style me!</p>
<button @click="toggle">Toggle Paragraph</button>
<input type="text" v-model="bgcolor" />
<p :style="{backgroundColor:bgcolor}">Style me inline!</p>
</section>
</body>
</html>
Javascript:
const app = Vue.createApp({
data() {
return {
inputClass: "",
vb: true,
bgcolor: "",
};
},
computed: {
paraClasses() {
return {
user1: this.inputClass==='user1',
user2: this.inputClass==='user2',
visible: this.vb,
hidden: !this.vb,
}
}
},
methods: {
toggle() {
this.vb = !this.vb;
},
},
});
app.mount("#assignment");
* {
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: #1b995e;
color: white;
text-align: center;
}
#assignment {
box-shadow: 0 2px 8px rgba(0, 0, 0, 0.26);
margin: 3rem;
border-radius: 10px;
padding: 1rem;
text-align: center;
}
#assignment h2 {
font-size: 2rem;
border-bottom: 4px solid #ccc;
color: #1b995e;
margin: 0 0 1rem 0;
}
p {
font-size: 1.25rem;
font-weight: bold;
background-color: #8ddba4;
padding: 0.5rem;
color: #1f1f1f;
border-radius: 25px;
}
#assignment input {
font: inherit;
border: 1px solid #ccc;
}
#assignment input:focus {
outline: none;
border-color: #1b995e;
background-color: #d7fdeb;
}
#assignment button {
font: inherit;
cursor: pointer;
border: 1px solid #ff0077;
background-color: #ff0077;
color: white;
padding: 0.05rem 1rem;
box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.26);
}
#assignment button:hover,
#assignment button:active {
background-color: #ec3169;
border-color: #ec3169;
box-shadow: 1px 1px 4px rgba(0, 0, 0, 0.26);
}
.user1 {
background-color: blue;
color: white;
}
.user2 {
background-color: purple;
color: white;
}
.hidden {
display: none;
}
.visible {
display: block;
}
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