reference js from html code example
Example 1: how to link your js file to html
<script src="index.js"></script>Example 2: how to link js to html
<script src="Your-JavaScript-File.js"></script> <!--If JS file is in same folder with HTML file--><script src="index.js"></script><script src="Your-JavaScript-File.js"></script> <!--If JS file is in same folder with HTML file-->