npm init -y
安装Vue
npm install vue
HelloWorld
创建index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<div >
<h1>Hello，{{name}}!</h1>
</div>
<script src="./node_modules/vue/dist/vue.js"></script>
<script>
let vm = new Vue({
el: "#app",
data: {
name: "World"
}
})
</script>
</body>
</html>
运行html
声明式渲染
F12操作控制台, 控制台输入vm.name="Vue"观察页面变化。