how to attach js file to html code example
Example 1: import js in html
<script type="text/javascript" src="yourfile.js"></script>
Example 2: how to link your js file to html
<script src="index.js"></script>
Example 3: how to link javascript to html
<script src="PathToYourFile.js"> </script>
Example 4: link js file to index.html
<script src="your js file"></script>