I wouldn’t, but you’re not much of a product designer if you can’t get your ideas across using simple tools like a sketch on a whiteboard (there was|is an app the let you take photos and link them using active areas).
So you can take bootstrap (or even raw html) and create something useful. Then you make it nice, not the other way around.
You would have to be a big outlier to feel the need to create a custom widget. Most widgets have been defined since decades.
I wouldn’t, but you’re not much of a product designer if you can’t get your ideas across using simple tools like a sketch on a whiteboard (there was|is an app the let you take photos and link them using active areas).
So you can take bootstrap (or even raw html) and create something useful. Then you make it nice, not the other way around.
You would have to be a big outlier to feel the need to create a custom widget. Most widgets have been defined since decades.