Answers for "how to link external javascript file to html page"

import js in html

<script type="text/javascript" src="yourfile.js"></script>

include script in html

<script type="text/javascript" src="/path/to/script.js"></script>

script src tag in html

<script type="text/javascript" 
         src="file.js">  
</script>

how to link javascript to html

<script src = "index.js"></script>

how to add javascript in html

<script src="script.js"></script>