这段代码怎样用vue实现？
<html>
<head>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script type="text/javascript">
function display_alert()
{
alert('hamimelon!')
}
</script>
</head>
<body>
<input type="button" onclick = "display_alert()" value="wo shi yige " />
</body>
</html>