Visual test images need to be generated.

Illegibility of the symbols when the checkbox is both disabled and readonly is an existing issue and is being addressed in issue
#7733

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

Thanks for the contribution @MatthewVaadin.

While I can see how this could be useful in some cases, I'm not convinced it should be part of the core component for a number of reasons:

• Very few applications are likely to benefit from it
• It's a very unusual rendering of checkboxes that few end users would be familiar with
• Using x on an unchecked checkbox especially seems problematic as it looks like a checked box
• As checked and unchecked are quite ambiguous without the colors, color blind users would likely have trouble parsing them correctly
• The contrast of the yellow undetermined box doesn't fulfill WCAG contrast requirements
• The lack of colors in readonly state makes it very difficult to see what is what

With these in mind, I would propose to publish this as a directory add-on or cookbook example instead. If there is significant demand for this variant we could consider taking it into the core component in a redesigned form.

Closing per above comment. Let's keep the issue open for collecting feedback regarding this feature.