JavaScript basic output and embedded writing tutorial

JavaScript does not have any printing or output functions.
In HTML, JavaScript is commonly used to manipulate HTML elements.
Manipulate HTML elements
To access an HTML element from JavaScript, you can use the document.getElementById(id) method.
Please use the "id" attribute to identify HTML elements and innerHTML to get or insert element content:
Example

<!DOCTYPE html>
<html>
<body>

<h1>我的第一个 Web 页面</h1>

<p id="demo">我的第一个段落</p>

<script>
document.getElementById("demo").innerHTML = "段落已修改。";
</script>

</body>
</html>

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The above JavaScript statement (in the

JavaScript basic output and embedded writing tutorial_Basic knowledge