This repository contains two examples of how to use linux-icons with Electron for tray icons. Source: linux-icons-electron-example

index.js

const {
  app,
  Tray,
  Menu,
  BrowserWindow,
  nativeImage
} = require('electron')
const icons = require('linux-icons')

let win

app.on('ready', function () {
  win = new BrowserWindow({
    show: true
  })
  let contextMenu = Menu.buildFromTemplate([{
    label: 'Quit',
    accelerator: 'Command+Q',
    selector: 'terminate:'
  }])

  icons.getIconBuffer('google-chrome-tray', 22, [icons.Context.STATUS, icons.Context.PANEL], buffer => {
    let tray = new Tray(nativeImage.createFromBuffer(buffer))
    tray.setToolTip('This is my application.')
    tray.setContextMenu(contextMenu)
  })
})

app.on('activate', () => {
  win.show()
})

index.sync.js

const {
  app,
  Tray,
  Menu,
  BrowserWindow,
  nativeImage
} = require('electron')
const icons = require('linux-icons')

// Sync Example
let buffer = icons.getIconBuffer.sync('google-chrome-tray', 22, [icons.Context.STATUS,
  icons.Context.PANEL
])
let icon = nativeImage.createFromBuffer(buffer)

let win

app.on('ready', function () {
  let tray = new Tray(icon)
  win = new BrowserWindow({
    show: true
  })
  let contextMenu = Menu.buildFromTemplate([{
    label: 'Quit',
    accelerator: 'Command+Q',
    selector: 'terminate:'
  }])

  tray.setToolTip('This is my application.')
  tray.setContextMenu(contextMenu)
})

app.on('activate', () => {
  win.show()
})

package.json

{ 
  "author": {
    "name": "Bilal Elmoussaoui"
  },
  "bundleDependencies": false,
  "dependencies": {
    "electron": "^1.6.10",
    "linux-icons": "^1.1.1"
  },
  "deprecated": false,
  "description": "Linux Icons Electron Example",
  "keywords": [
    "Linux",
    "Icons",
    "Electron"
  ],
  "license": "MIT",
  "main": "index.js",
  "name": "linux-icons-electron-example",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "version": "1.1.2"
}