Inspect Browser per iOS e Android

It would be the perfect app for web development / coding, if only it wasn’t crashing very often. The app “does” everything you need, you can inspect code, edit css, edit html...point to select an item in the page...all (almost) good. With my super new iPad pro 13’ (so not an old legacy device) it crashes...you click on something edit css, move around, edit something else...then boom it crashes. Then you start over...maybe this time it works, maybe it crashes sooner, maybe it crashes later...in o

I have downloaded this app cause i need a development Tool that allows me to debug javascript code, but this app doesn’t do that, it has a very good design an it can Inspect HTML very well, but javascript? How i can debug a javascript code or how i can visualize the javascript part of a website? I don’t know if in future this app Will be update, but i think that for a developer the javascript part of a website or an app is important. I hope that the Owner of this app are going to fix this thing