Method _callFirstTimer

packages/injected/src/clock.ts:355–394

(beforeTick: number)

  }

  private async _callFirstTimer(beforeTick: number): Promise<{ timerFound: boolean, error?: Error }> {
    const timer = this._takeFirstTimer(beforeTick);
    if (!timer)
      return { timerFound: false };

    this._duringTick = true;
    try {
      if (typeof timer.func !== 'function') {
        let error: Error | undefined;
        try {
          // Using global this is not correct here,
          // but it is already broken since the eval scope is different from the one
          // on the original call site.
          // eslint-disable-next-line no-restricted-globals
          (() => { globalThis.eval(timer.func); })();
        } catch (e) {
          error = e;
        }
        await new Promise<void>(f => this._embedder.setTimeout(f));
        return { timerFound: true, error };
      }

      let args = timer.args;
      if (timer.type === TimerType.AnimationFrame)
        args = [this._now.ticks];
      else if (timer.type === TimerType.IdleCallback)
        args = [{ didTimeout: false, timeRemaining: () => 0 }];

      let error: Error | undefined;
      try {
        timer.func.apply(null, args);
      } catch (e) {
        error = e;
      }
      await new Promise<void>(f => this._embedder.setTimeout(f));
      return { timerFound: true, error };
    } finally {
      this._duringTick = false;
    }
  }

  getTimeToNextFrame() {
    // When `window.requestAnimationFrame` is the first call in the page,