var Quagga = require('../lib/quagga'); Quagga.decodeSingle({ src: "../test/fixtures/code_128/image-001.jpg", numOfWorkers: 0, inputStream: { 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"); } });