Hi Sacha,
I believe there are a few different libraries being used for various parts of the UI. Dojo is used quite a bit, but we also use Inferno.js for grids and d3.js for Graph Navigation.
There's no limitation on using other libraries like react or angular though. Depending on the custom UI you're looking to add, I'd also recommend taking a look at CUI for a low-code approach to extending the existing UI. There's a lot of possibilities for customization available, and using CUI will also help easily achieve a consistent look with the rest of the Aras Innovator client.
Chris
Christopher Gillis
Aras Labs Software Engineer
