external js link tag code example
Example 1: how to link your js file to html
<script src="index.js"></script>
Example 2: import script html
<html>
<head>
<script type="text/javascript" src="/path/to/script.js"></script>
...
<script src="index.js"></script>
<html>
<head>
<script type="text/javascript" src="/path/to/script.js"></script>
...