var Quagga = require('../dist/quagga.node').default; var buffer = require('fs').readFileSync('../test/fixtures/code_128/image-001.jpg'); decode(buffer); function decode(buff) { Quagga.decodeSingle({ src: buff, numOfWorkers: 0, inputStream: { mime: 'image/jpeg', size: 800, area: { top: '10%', right: '5%', left: '5%', bottom: '10%' } } }, function (result) { if (result.codeResult) { console.log('result', result.codeResult.code); } else { console.log('not detected'); } }); }