download and add jquery to a site code example
Example 1: how to download jquery
You have quite a few options
You can get the whole source
Uncompressed dev: https://code.jquery.com/jquery-3.4.1.js
Compressed production: https://code.jquery.com/jquery-3.4.1.min.js
You the simply save the code into a Javascript file and include it in the usual way
<script type="text/javascript" src="jquery.js"></script>
Or point to a CDN, such as Google's
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
You can get it using NPM, Yarn or Bower
npm install jquery
yarn add jquery
bower install jquery
You can even get the latest builds from GitHub
git clone git://github.com/jquery/jquery.git
Example 2: how to use jQuery
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>jQuery</title>
</head>
<body>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<script>
//jQuery code
</script>
</body>
</html>