get itemHeights()

in js/index.js [441:450]

• 10 lines of code
• 2 McCabe index (conditional complexity)

  get itemHeights() {
    if (!this._itemHeights) {
      const { defaultItemHeight, items } = this.options;
      this._itemHeights = new BinaryIndexedTree({
        defaultFrequency: Math.max(defaultItemHeight, 1),
        maxVal: items.length,
      });
    }
    return this._itemHeights;
  }