Method componentWillUnmount

src/components/ModalPortal.js:135–141

()

  }

  componentWillUnmount() {
    if (this.state.isOpen) {
      this.afterClose();
    }
    clearTimeout(this.closeTimer);
    cancelAnimationFrame(this.openAnimationFrame);
  }

  setOverlayRef = overlay => {
    this.overlay = overlay;