SliderFieldWidget class

slider. A Material Slider when SliderComponent.multiple is false, a RangeSlider when true — the value is a number or a two-element List respectively, round-tripped through the ordinary form paths. Bounds and divisions come from the node's config; the enforceable half of the same declaration rides the ordinary rules block into the shared validator, so there is no slider-specific validation here.

A range slider with no array default publishes multiple: false on /schema (the documented server weakness — isMultiple() reads the raw state at walk time) and /state may re-answer true. Nothing here treats either answer as more than a rendering hint: the control renders from the node it is given, a value shaped for the OTHER mode reads as unset rather than crashing, and a submission is never blocked on the client hint.