React.js, download pdf

Handle pdf download in React.js

                   <div className="formRow float-right-no-margin">
                        {this.props && this.props.file && this.props.file.length > 0 && (
                            <Button variant="primary" onClick={handlePdfDownload}>
                                Download
                            </Button>
                        )}
                        &nbsp;&nbsp;
                        <Button variant="secondary" onClick={this.props.handlePreviewClose}>
                            Close
                        </Button>
                    </div>
 

        const handlePdfDownload = () => {
            // Insert a link that allows the user to download the PDF file
            var link = document.createElement('a');
            link.innerHTML = 'Download PDF file';
            link.download = this.props.fileName;
            link.href = this.props.file;
            document.body.appendChild(link);
            link.click();
            document.body.removeChild(link);
        };

//hide Modal

   handlePreviewClose = () => {
        this.setState({ showPreview: false, pageNumber: 1 })
    };