atom/packages/about/lib/components/about-status-bar.js

const { CompositeDisposable } = require('atom')
const etch = require('etch')
const EtchComponent = require('../etch-component')

const $ = etch.dom

module.exports = class AboutStatusBar extends EtchComponent {
  constructor () {
    super()
    this.subscriptions = new CompositeDisposable()

    this.subscriptions.add(
      atom.tooltips.add(this.element, {
        title:
          'An update will be installed the next time Atom is relaunched.<br/><br/>Click the squirrel icon for more information.'
      })
    )
  }

  handleClick () {
    atom.workspace.open('atom://about')
  }

  render () {
    return $.div(
      {
        className: 'about-release-notes inline-block',
        onclick: this.handleClick.bind(this)
      },
      $.span({ type: 'button', className: 'icon icon-squirrel' })
    )
  }

  destroy () {
    super.destroy()
    this.subscriptions.dispose()
  }
}