Driver is undefined while calling `getPrinter`

Getting following error when I try to print a page

"TypeError: Cannot read property 'getPrinter' of undefined"

The error happens when executing /lib/interfaces/printer.js:31

  if (this.driver.getPrinter(this.getPrinterName())) { ...

Because it doesn’t meet the condition in the constructor to set driver.

  constructor(printerName, moduleName) {
    super();
    this.name = printerName;
    if (moduleName && typeof moduleName === "object") {
      this.driver = moduleName;
    }

I wonder what is supposed to pass as the second argument here and why it may be undefined? /lib/interfaces/index.js:17

  } else if (printer) {
    const Printer = require('./printer');
    return new Printer(printer[1], printer[2]);

[vadhack]

@Klemen1337 Yes, I realized, thank you.

@ertankara the correct way is:

      let printer = new ThermalPrinter({
        type: PrinterTypes.STAR,
        // I've also tried "printer:auto" both of them gives the same result
        // "TypeError: Cannot read property 'getPrinter' of undefined"
        interface: "printer:Star TSP100 Cutter (TSP143)",
        characterSet: "SLOVENIA",
        options: {
          timeout: 5000
        },
        driver: require(electron ? 'electron-printer' : 'printer'), // setting driver module
      });
      // Error is thrown when executing line below
      let isConnected = await printer.isPrinterConnected();

[ertankara]

@Klemen1337

Using the code below in an Electron project.

  const ThermalPrinter =  require("node-thermal-printer").printer;
  const PrinterTypes = require("node-thermal-printer").types;


  let printer = new ThermalPrinter({
        type: PrinterTypes.STAR,
        // I've also tried "printer:auto" both of them gives the same result
        // "TypeError: Cannot read property 'getPrinter' of undefined"
        interface: "printer:Star TSP100 Cutter (TSP143)",
        characterSet: "SLOVENIA",
        options: {
          timeout: 5000
        }
      });
      // Error is thrown when executing line below
      let isConnected = await printer.isPrinterConnected();

By the way this is of course in an async function, I didn’t include function signature.