<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<button @click="fn($event)">按钮</button>
</div>
</body>
<script src="https://cdn.jsdelivr.net/npm/vue"></script>
<script>
let vm=new Vue({
el:'#app',
data:{
},
methods:{
fn(e){
console.log(e);
}
}
})
</script>
</html>
