CommandBase.checkIsAvailable method

CommandBase › checkIsAvailable

Whether the control can be used right now. When it returns false the control is rendered **disabled rather than removed**, so the strip does not reflow under the pointer as modes change — which on a phone means a mis-tap.

Re-read by ModalCommands.refresh. When omitted, the builder never touches the control's disabled state, leaving whatever CheckboxCommand.onInit / DropDownCommand.onInit set.

Signature:

checkIsAvailable(this: void): boolean

Parameters:

Parameter	Type	Description
this	void

Returns: boolean — Whether the control can be used right now.