javascript in file html code example
Example 1: import js in html
<script type="text/javascript" src="yourfile.js"></script>
Example 2: include script in html
<script type="text/javascript" src="/path/to/script.js"></script>
Example 3: import script html
<html>
<head>
<script type="text/javascript" src="/path/to/script.js"></script>
...