Function isInvalid

src/cdk/stepper/stepper.ts:634–638

(control: StepControl)

}

function isInvalid(control: StepControl): boolean {
  // Note: it's a bit redundant to have both `isValid` and `isInvalid`. We need both, because
  // some internal apps mock out `invalid` specifically so `!valid` won't hit the mock.
  return isField(control) ? control().invalid() : control.invalid;
}

function isPending(control: StepControl): boolean {
  return isField(control) ? control().pending() : control.pending;