isDesktop

1/**
2 * Determines whether the current device is a desktop.
3 * Relies on user agent and basic platform assumptions.
4 *
5 * @returns True if the device appears to be a desktop, false otherwise.
6 */
7export function isDesktop(): boolean {
8  if (typeof navigator === 'undefined' || typeof window === 'undefined') return false;
9
10  const ua = navigator.userAgent.toLowerCase();
11  const isMobile = /mobile|android|touch|webos|hpwos|phone|tablet|kindle|silk/.test(ua);
12
13  return !isMobile;
14}

1const originalNavigator = global.navigator;
2
3afterEach(() => {
4  global.navigator = originalNavigator;
5});
6
7test('returns true for desktop user agent', () => {
8  // @ts-ignore
9  global.navigator = { userAgent: 'Mozilla/5.0 (Windows NT 10.0; Win64; x64)' };
10  expect(isDesktop()).toBe(true);
11});
12
13test('returns false for mobile user agent', () => {
14  // @ts-ignore
15  global.navigator = { userAgent: 'Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X)' };
16  expect(isDesktop()).toBe(false);
17});
18
19test('returns false when navigator is undefined', () => {
20  // @ts-ignore
21  delete global.navigator;
22  expect(isDesktop()).toBe(false);
23});