var Quagga = require('quagga').default; Quagga.decodeSingle({ src: "image-abc-123.jpg", numOfWorkers: 0, // Needs to be 0 when used within node inputStream: { size: 800 // restrict input-size to be 800px in width (long-side) }, decoder: { readers: ["code_128_reader"] // List of active readers },}, function(result) { if(result.codeResult) { console.log("result", result.codeResult.code); } else { console.log("not detected"); }});