JavaScript
console.log("Hello,world!");
alert版
alert("Hello,World!");
DOM操作版
<html>
<head>
<meta charset="utf-8">
<title>Hello,World!</title>
</head>
<body>
<div></div>
<script>
let d = document.getElementByTagName("div")[0];
d.textContent = "Hello,World!";
</script>
</body>
</html>
通報 ...