The scan events gets triggered when a barcode (or 2D code) is scanned, e.g. by using the wedgeScanner control. You can then ask the control for the scanned code.
Simple Example
console.log("The scanned code is: "app.getFieldValue("myScannerControlId"));
let result =awaitbrixxApi.businessBrixx({ functionName:"Gs1Splitter", methodName:"Split", gs1Code:brixxApi.getFieldValue("myScannerControlId") });console.log(result)