Function removeTransitionClass

packages/runtime-dom/src/components/Transition.ts:329–338

(el: Element, cls: string)

}

export function removeTransitionClass(el: Element, cls: string): void {
  cls.split(/\s+/).forEach(c => c && el.classList.remove(c))
  const _vtc = (el as ElementWithTransition)[vtcKey]
  if (_vtc) {
    _vtc.delete(cls)
    if (!_vtc!.size) {
      ;(el as ElementWithTransition)[vtcKey] = undefined
    }
  }
}

function nextFrame(cb: () => void) {
  requestAnimationFrame(() => {