Method batchUpdate

src/gridstack.ts:833–842

* use before calling a bunch of `addWidget()` to prevent un-necessary relayouts in between (more efficient) * and get a single event callback. You will see no changes until `batchUpdate(false)` is called.

(flag = true)

   * and get a single event callback. You will see no changes until `batchUpdate(false)` is called.
   */
  public batchUpdate(flag = true): GridStack {
    this.engine.batchUpdate(flag);
    if (!flag) {
      this._updateContainerHeight();
      this._triggerRemoveEvent();
      this._triggerAddEvent();
      this._triggerChangeEvent();
    }
    return this;
  }

  /**
   * Gets the current cell height in pixels. This takes into account the unit type and converts to pixels if necessary.