Workers in iframe not working

[runemadsen]

I'm trying to load the jsrepl from a CDN, and I keep getting worker security errors. As stated in the documentation, I tried to load the workers in an iframe to bypass this:

jsrepl.loadLanguage('python', function () {  
    alert('Python loaded');  
  }, false);

But this doesn't seem to change anything at all. Is it possible to load jsrepl from a CDN, or is this functionality broken at the moment?

Thanks for a great lib!

[amasad]

Yeah unfortunately worker scripts need to be loaded from the same domain as the parent script (Cross-origin policy). There are CDNs that work on the same domain, like fastly. Maybe try that.

[runemadsen]

Thanks for this! As a quick follow-up question, how hard would it be to patch JSRepl to work on a remote CDN? Would it be possible to do something in iframe/script injection to make it possible to live on an external CDN, while the workers are still considered local?

[amasad]

Not sure to be honest. If you want to load the main script and the language files from different domains you need to use CORS. I think it'll be hard because you need to make emscripten use CORS for file loading