How to add an option to VL53L0X module

The code have at least one problem - bit fields for registers are not shown for module user (or I do not know how to use it). I do not know JS so I do not know how to correct the code. Could you help me?
I think I can not write description in style of "Writing Modules" because I use own board with a few sensors and do not know about boards available to others. But. of course, I can write code example:

var i2c=new I2C();
i2c.setup({ sda:D12, scl:D13} );

//var sensor = require("VCNL4200").connect(i2c,{address­:0x51}); //0x51 is default address so may be omitted
var sensor = require("VCNL4200").connect(i2c);
//sensor.Configure(); //It is possible to use it for some default mode, but it should be investigated what to set as default
sensor.setAmbiConf(0);
sensor.setProxiConf12(0x2A,0x0B);
sensor.setProxiConf3MS(0x70,0x27); //0x27 to use INT pin as proximity signal, 0x7 to use INT as interrupt
sensor.setProxiLowThreshold(1000);
sensor.setProxiHighThreshold(3000);

sensor.logAll();

function log (){
  console.log(
      " Proximity: " + sensor.getProximity() +
      " Ambient: " + sensor.getAmbient() +
      " White: " + sensor.getWhite() +
      " Int: " + sensor.getInterruptFlags().toString(16))­;
}
setInterval(log, 1000);