Download Blob in TS

downloadBlob.ts

public downloadBlob(blob: Blob, documentName: string, extension: string)
{
    const fileURL = URL.createObjectURL(blob);
    const a: HTMLAnchorElement = document.createElement('a');
    document.body.appendChild(a);
    a.href = fileURL;
    a.download = `${documentName}.${extension}`;
    a.click();
}