Videos
Does the viewer execute JavaScript?
What can I use the HTML Viewer for?
Can I view external CSS or JavaScript files?
Factsheet
Yes there is a way to look at all of a webpages html, Javascript files, and CSS using Chrome. Open up the page in chrome, right click on the page and select inspect element (or press ctrl+shift+I). From there you can navigate the different elements on the the page and the structure of the HTML file. To get at the Javascript and CSS files switch over to the sources tab and look through the folders on the left to find the file you are looking for.
A word of warning, depending on the site the code that they are using may be minified (most all of the white space removed, and lots of variable names and other things shortened) or otherwise very difficult to read. If you are looking to do something more specific then I would recommend searching for that, or posting a question regarding that problem.
If you want to view the Javascript code, you can right-click the page, then select Inspect, then navigate to the javascript line by highlighting or selecting that line with .js extension and then position your pointer in the .js file, right-click & select Reveal in Sources panel.
I'm Trying to play an off Play Store game But it says I need to enable Java script for HTML viewer idk what to do pls help Ps it's an HTML game if you didn't get the hint