Function goBackwardImpl

src/checkpoints/index.ts:145–152

()

    };

    const goBackwardImpl = () => {
      if (!arrayIsEmpty(backwardIds)) {
        arrayUnshift(forwardIds, addCheckpointImpl());
        updateStore(0, currentId as Id);
        currentId = arrayPop(backwardIds);
        checkpointsChanged = 1;
      }
    };

    const goForwardImpl = () => {
      if (!arrayIsEmpty(forwardIds)) {