How to get the entire document HTML as a string in JavaScript?

To get the entire document HTML as a string, use the concept of innerHTML, like −

document.documentElement.innerHTML;

Example

Following is the code −

<!DOCTYPE html>
<html lang="en">
<head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <title>Document</title>
</head>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<body>
<h1> Hello World </h1>
<p>This is the javascript program..</p>
</body>
<script>
   var entireDocumentHTMLAsAString = document.documentElement.innerHTML;
   console.log(entireDocumentHTMLAsAString);
</script>
</html>

To run the above program, save the file name anyName.html(index.html). Right click on the file and select the option “Open with live server” in VS Code editor.