<script type="text/javascript" src="yourfile.js"></script>
<script type="text/javascript" src="/path/to/script.js"></script>
<html> <head> <script type="text/javascript" src="/path/to/script.js"></script> ...
<script src = "index.js"></script>
<script src="myScript.js"></script>
<script src="script.js"></script>
<script> document.getElementById("demo").innerHTML = "My First JavaScript"; </script>
<script> // JS Here </script>
<!-- Option 1 --> <script> document.getElementById("demo").innerHTML = "My First JavaScript"; </script> <!-- Option 2 --> <script src="script.js"></script>