Method loadUnitFromStorage

js/ReadingSystem.js:280–286

* 从 localStorage 恢复上次学习的单元 * @returns {Promise }

()

   * @returns {Promise<void>}
   */
  async loadUnitFromStorage() {
    if (!this.state.units.length) return;

    const unitIndex = getCurrentUnitIndex(this.state.bookPath);
    const safeIndex = clamp(unitIndex, 0, this.state.units.length - 1);
    await this.loadUnitByIndex(safeIndex, { shouldScrollUnitIntoView: true });
  }

  /**
   * 根据索引加载指定单元