Function componentDidUpdate

src/Modal.js:160–176

(prevProps, prevState)

  }

  componentDidUpdate(prevProps, prevState) {
    if (this.props.isOpen && !prevProps.isOpen) {
      this.init();
      this.setState({ isOpen: true });
      // let render() renders Modal Dialog first
      return;
    }

    // now Modal Dialog is rendered and we can refer this._element and this._dialog
    if (this.props.autoFocus && this.state.isOpen && !prevState.isOpen) {
      this.setFocus();
    }

    if (this._element && prevProps.zIndex !== this.props.zIndex) {
      this._element.style.zIndex = this.props.zIndex;
    }
  }

  componentWillUnmount() {
    this.clearBackdropAnimationTimeout();