HeroProtagonist

const EventSystem = function () {
  const _storage = {}

  this.addListener = (event, func) => {
    if (!_storage[event]) _storage[event] = []

    _storage[event].push(func)
  }

  this.removeListener = (event, func) => {

HeroProtagonist

• webpage test - test site on remote devices
• lighthouse - test site locally in chrome or using cli
• web.dev - resources from google about web best practices
  • Performance Budgets - Enforce that performance does not degrade with code changes
• Addy Osmani's blog - chrome developer focused on performance
• The Chrome User Experience Report CrUX - user data about site performance reported by chrome
• Chrome local overrides - change website in chrome and preserve during refreshes