Can I use my form's source code to implement a minimum resolution check for user uploads?

I know you don't currently offer this feature but I would like to know if I can get a developer to implement a minimum resolution check using my forms' source code so that users are not able to upload low-res images on to the form. Let me know. Thanks! 

Yes. Of course! You may use the source code of the form to make necessary changes as per your requirements. Please refer to the guide below that can help you to get the full source code of the form.

https://www.jotform.com/help/104-How-to-get-the-Full-Source-Code-of-your-Form

Hope this information helps!