Method componentWillUpdate

src/components/DayPicker.jsx:363–380

()

  }

  componentWillUpdate() {
    const { transitionDuration } = this.props;

    // Calculating the dimensions trigger a DOM repaint which
    // breaks the CSS transition.
    // The setTimeout will wait until the transition ends.
    if (this.calendarInfo) {
      this.setCalendarInfoWidthTimeout = setTimeout(() => {
        const { calendarInfoWidth } = this.state;
        const calendarInfoPanelWidth = calculateDimension(this.calendarInfo, 'width', true, true);
        if (calendarInfoWidth !== calendarInfoPanelWidth) {
          this.setState({
            calendarInfoWidth: calendarInfoPanelWidth,
          });
        }
      }, transitionDuration);
    }
  }

  componentDidUpdate(prevProps, prevState) {
    const {