export function startPlayingAndWaitForVideo()

in src/webgpu/web_platform/util.ts [372:429]

• 54 lines of code
• 5 McCabe index (conditional complexity)

export function startPlayingAndWaitForVideo(
  video: HTMLVideoElement,
  callback: () => unknown | Promise<unknown>
): Promise<void> {
  return raceWithRejectOnTimeout(
    new Promise((resolve, reject) => {
      const callbackAndResolve = () =>
        void (async () => {
          try {
            await callback();
            resolve();
          } catch (ex) {
            reject(ex);
          }
        })();
      if (video.error) {
        reject(
          new ErrorWithExtra('Video.error: ' + video.error.message, () => ({ error: video.error }))
        );
        return;
      }

      video.addEventListener(
        'error',
        event =>
          reject(
            new ErrorWithExtra('Video received "error" event, message: ' + event.message, () => ({
              event,
            }))
          ),
        true
      );

      if (video.requestVideoFrameCallback) {
        video.requestVideoFrameCallback(() => {
          callbackAndResolve();
        });
      } else {
        // If requestVideoFrameCallback isn't available, check each frame if the video has advanced.
        const timeWatcher = () => {
          if (video.currentTime > 0) {
            callbackAndResolve();
          } else {
            requestAnimationFrame(timeWatcher);
          }
        };
        timeWatcher();
      }

      video.loop = true;
      video.muted = true;
      video.preload = 'auto';
      video.play().catch(reject);
    }),
    2000,
    'Video never became ready'
  );
}