add link to script in javascript code example
Example 1: import js in html
<script type="text/javascript" src="yourfile.js"></script>
Example 2: script src tag in html
<script type="text/javascript"
src="file.js">
</script>
<script type="text/javascript" src="yourfile.js"></script>
<script type="text/javascript"
src="file.js">
</script>