Function playTransition

core/src/utils/transition/index.ts:187–208

(trans: Animation, opts: TransitionOptions)

};

const playTransition = (trans: Animation, opts: TransitionOptions): Promise<boolean> => {
  const progressCallback = opts.progressCallback;

  const promise = new Promise<boolean>((resolve) => {
    trans.onFinish((currentStep: any) => resolve(currentStep === 1));
  });

  // cool, let's do this, start the transition
  if (progressCallback) {
    // this is a swipe to go back, just get the transition progress ready
    // kick off the swipe animation start
    trans.progressStart(true);
    progressCallback(trans);
  } else {
    // only the top level transition should actually start "play"
    // kick it off and let it play through
    // ******** DOM WRITE ****************
    trans.play();
  }
  // create a callback for when the animation is done
  return promise;
};

const fireWillEvents = (enteringEl: HTMLElement | undefined, leavingEl: HTMLElement | undefined) => {
  lifecycle(leavingEl, LIFECYCLE_WILL_LEAVE);