How do I custom style the underline of Material-UI without using theme?

Question

I have success with outline custom styling when variant=\"outlined\" and I use notchedOutline in InputProps.

Otherwise -

Answer 1

Not sure which version of material-ui you are using, but you can override classes as needed, see the following API documentation:

https://material-ui.com/api/outlined-input/#demos

https://material-ui.com/api/outlined-input/