Questions from React developer planning to start selling on Envato

Hi, I’m React Front-end developer who plans to start selling on envato. I have a few questions:

  1. I noticed React/NodeJS projects can be found both on ThemeForest and CodeCanyon. How to decide where should I place my products? If one product only has front-end design and another one includes some back-end functionality. Should the first one go to ThemeForest and the second one to CodeCanyon?

  2. Can I somewhere find Envato requirements to React/NodeJS standarts, such as coding, explanation, documentation, project structure etc.

  1. design based item (as like web template, theme, backend template … etc) should to upload on themeforest and application/module based item should to upload on codecanyon. You can check market (themeforest, codecanyon) category page to know about product on that marketplace.