include js in html

JavaScript
<script type="text/javascript" src="yourfile.js"></script><script type="text/javascript" src="/path/to/script.js"></script><script src="index.js"> </script><script type="text/javascript" src="path-to-javascript-file.js"></script><script src="PathToYourFile.js"> </script><html>
    <head>        
    </head>
    <body>
    
        <script type="text/javascript" src=es4.js></script>
           
    </body>
        
</html>
Source