CocoRoboDesktop/js/excel.js

exceltoxlxstream = async function (file) {
    return new Promise(resolve => {
        if (file) {
            const reader = new FileReader();
            reader.onload = async function (e) {
                const data = new Uint8Array(e.target.result);
                const workbook = XLSX.read(data, { type: 'array' });
                const fileStream = XLSX.write(workbook, { type: 'array', bookType: 'xlsx' });
                resolve(fileStream);
            };
            reader.readAsArrayBuffer(file);
        }
    });
}