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isAndroid()

true when the current environment is an Android WebView / legacy Android Browser — not Chrome for Android.

Signature(options?: DetectOptions) => boolean
MatchesUA containing Android + Mozilla/5.0 + AppleWebKit, minus any more-specific browser

Heuristic​

UA must contain all of Android, Mozilla/5.0, and AppleWebKit. This matches:

  • Embedded WebViews used by Android system apps (Twitter, Facebook in-app browser, Gmail).
  • The legacy Android Browser (pre-2014, shipped before Chrome for Android became the default).

Chrome for Android has a Chrome/ token and is matched by isChrome() first — detect() reports 'chrome' for it. The Android bucket is reached only when no more-specific browser claims the UA.

Example​

import { isAndroid } from 'get-browser';

if (isAndroid()) {
  // Probably an in-app browser. Avoid features that require app-level APIs
  // (camera permissions, share sheets, etc.).
}

Detecting in-app browsers​

Most in-app browsers (Facebook, Instagram, Twitter, Gmail, …) embed a WebView. A heuristic:

import { isAndroid } from 'get-browser';

function looksLikeInAppBrowser(ua = navigator.userAgent) {
  return isAndroid() && /\b(FBAN|FBAV|Instagram|Twitter|Line|Snapchat)\b/i.test(ua);
}

See also​