Let Form-Associated Custom Elements match :in-range, and :out-of-range pseudo-selectors

[NickGard]

What is the issue with the HTML Standard?

The spec as currently written does not provide a way for Form-Associated Custom Elements to have range limitations (or define some other way of participating in range validation) and matching :in-range and :out-of-range pseudo selectors.

• :in-range
• :out-of-range
• "have range limitations"

Form-Associated Custom elements can match most of the other form-specific pseudo-selectors, like :disabled, :read-only, :read-write, :valid, and :invalid. Matching the rest of the form-specific pseudo-selectors would allow FA Custom Elements to behave more like their native counterparts.