Function extractFileExtension

src/lib/file.js:58–65

(fileName)

}

export function extractFileExtension(fileName) {
  const lastindexDot = fileName.lastIndexOf('.');
  if (lastindexDot <= 0) { // no extension
    return '';
  } else {
    return fileName.substring(lastindexDot + 1, fileName.length).toLowerCase().trim();
  }
}

export class FileUpload {
  constructor() {