How to stop the loop for JavaScript scroll down?

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To stop the loop, use clearInterval() in JavaScript.

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>
<script>
   var start = 0;
   var limit = 200;
   var scroll = setInterval(() => this.startScrollDown(), 20);
   function startScrollDown() {
      window.scrollBy(0, 1000);
      console.log(start)
         if (start == limit) clearInterval(scroll);
      start++;
   }
</script>
</html>

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