index.html
<!doctype html>
<html lang="zh-Hans">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<div id="app">
<g-button></g-button>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script src="./button.js"></script>
<script>
new Vue({
el:'#app',
data:{
message:'hi'
}
})
</script>
</body>
</html>
button.js
Vue.component('g-button',{
template:`
<button>hi</button>>
`
})
运行结果