const usb = require("webusb").usb;
const escpos = require('escpos');

function connect(){

    var vid;
    var pid;

    navigator.usb.requestDevice({ filters: [{ vendorId: 0x04b8 }] })
    .then(devicePrinter => {

    console.log(device.vendorId);
    console.log(device.productId);
    vid = device.vendorId.toString(16);
    pid = device.productId.toString(16);
    console.log(vid + pid);
    })
    .catch(error => { console.log(error); });

    const device  = new escpos.USB("0x0"+vid, "0x0"+pid);
    const printer = new escpos.Printer(device);

    device.open(function(){

        printer
        .align('ct')
        .text("nice")

        .cut()
        .close();

    });
}