为什么会弹出两次hello

分类：HBuilderX

HBuilder HBuilder X

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script src="jquery-3.4.1.min.js"></script>
<script type="text/javascript">
$(function(){
alert("hello");
});
</script>
</head>
<body>
</body>
</html>