twenty/packages/twenty-front/src/modules/spreadsheet-import/utils/readFilesAsync.ts

export const readFileAsync = (file: File) => {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();

    reader.onload = () => {
      resolve(reader.result);
    };

    reader.onerror = reject;

    reader.readAsArrayBuffer(file);
  });
};