Method constructor

src/react-list.js:111–123

(props)

  }

  constructor(props) {
    super(props);
    this.state = constrain(props, {
      itemsPerRow: 1,
      from: props.initialIndex,
      size: 0
    });
    this.cache = {};
    this.cachedScrollPosition = null;
    this.prevPrevState = {};
    this.unstable = false;
    this.updateCounter = 0;
  }

  componentDidMount() {
    this.updateFrameAndClearCache = this.updateFrameAndClearCache.bind(this);