promiseChainer.js

function sendHidData() {
    printData = "abcdefghijklmnopqrstuvwhyz\n" + 
      "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

        var deviceInfo = {
            vendorId: $("#hidVendor").val(),
            productId: $("#hidProduct").val(),
            usagePage: $("#hidUsagePage").val(),
            serial: $("#hidSerial").val(),
            data: "",
            endpoint: $("#hidReport").val()
        };

        createDataChain(qz.hid.sendData, deviceInfo, printData, 32).catch(displayError);   
    }

    function createDataChain(targetFunction, deviceInfo, data, chunkLength) {
        var chain = Promise.resolve();
        for (var i = 0; i < data.length; i += chunkLength) {
            
            //copy object
            let newInfo = {
                vendorId: deviceInfo.vendorId,
                productId: deviceInfo.productId,
                usagePage: deviceInfo.usagePage,
                serial: deviceInfo.serial,
                data: "",
                endpoint: deviceInfo.endpoint
            };

            newInfo.data = data.substring(i, Math.min(i + chunkLength, data.length));
            console.log(newInfo.data);
            chain = chain.then(()=>targetFunction(newInfo));
        }
        return chain;
    }