fadeInOutUsage.js

const { remote } = require("electron");

// ...`fadeWindowOut` and `fadeWindowIn` functions goes here...

// Get the current window.
const currentWindow = remote.getCurrentWindow();

// Fade-out window every 2 milliseconds, step by 0.1
let fadeOutWindowIntervalRef = fadeWindowOut(currentWindow, 0.1, 2);

// Fade-in window every 2milliseconds, step by 0.1
let fadeInWindowIntervalRef = fadeWindowIn(currentWindow, 0.1, 2)