how to add external javascript in html code example
Example 1: include script in html
<script type="text/javascript" src="/path/to/script.js"></script>
Example 2: how to link your js file to html
<script src="index.js"></script>
Example 3: link javascript to html
<script src="index.js"> </script>
Example 4: how to link javascript to html
<script src="PathToYourFile.js"> </script>
Example 5: how to add script in html head
<script src="script.js" defer></script>
<!--just add defer attribute so script will execute at last-->
Example 6: how to include external javascript in html
<script src="script.js">