I've come across various discussions on implementing a 3-state checkbox with a directive or using CSS tricks (such as setting 'indeterminate=true' which doesn't seem to work).
However, I'm curious if there's another method to create a 3-state checkbox for three different values (true, false, and null).
The visual representation of the 3 states would be:
- Checked
- Unchecked (blank)
- Indeterminate (fully colored or something similar)