Method updateSimpleFrame

src/react-list.js:320–340

(cb)

  }

  updateSimpleFrame(cb) {
    const { end } = this.getStartAndEnd();
    const itemEls = this.items.children;
    let elEnd = 0;

    if (itemEls.length) {
      const { axis } = this.props;
      const firstItemEl = itemEls[0];
      const lastItemEl = itemEls[itemEls.length - 1];
      elEnd =
        this.getOffset(lastItemEl) +
        lastItemEl[OFFSET_SIZE_KEYS[axis]] -
        this.getOffset(firstItemEl);
    }

    if (elEnd > end) return cb();

    const { pageSize, length } = this.props;
    const size = Math.min(this.state.size + pageSize, length);
    this.maybeSetState({ size }, cb);
  }

  updateVariableFrame(cb) {
    if (!this.props.itemSizeGetter) this.cacheSizes();