Advice and ideas regarding the development of and editor similar the the PlayCanvas web editor?

I've been looking at the PlayCanvas web based editor. It's a obviously based on the Unity GUI but it's developed using web technology.

As a a seasoned Developer I could quite easily start coding in earnest to produce something similar. However, I was wondering if I should code a similar application from scratch or if there are any frameworks or libraries out there that people would suggest that I could use ease the burden?

I'm aware Of React and Angular although I've never used them.

Should I use these? Or any other frameworks or libraries out there?

Have any of you developed something similar and if so, how did you approach it?

Advice would be appreciated.