openExportPDFModal() {
    html2canvas(this.exportPDFRef.current)
      .then((canvas) => {
      this.doc = new jsPDF();
        const img = canvas.toDataURL("image/png");

        const width = this.doc.internal.pageSize.getWidth();
        const height = this.doc.internal.pageSize.getHeight();

        this.doc.addImage(img, 'PNG', 0, 0, width, height);
        this.doc.save(this.state.exportPDFName);
      });
  }