/**
 * Minimal browser / environment detection used by the floating-ui-react port.
 *
 * Mirrors `@base-ui/utils/detectBrowser` — only the subset the port actually
 * consumes is inlined here so we don't have to vendor a separate dependency.
 * Each flag matches the React source so behavior is 1:1.
 */

const hasNavigator = typeof navigator !== "undefined";
function getNavigatorData() {
  if (!hasNavigator) {
    return {
      platform: "",
      maxTouchPoints: -1
    };
  }
  const uaData = navigator.userAgentData;
  if (uaData?.platform) {
    return {
      platform: uaData.platform,
      maxTouchPoints: navigator.maxTouchPoints
    };
  }
  return {
    platform: navigator.platform ?? "",
    maxTouchPoints: navigator.maxTouchPoints ?? -1
  };
}
function getUserAgent() {
  if (!hasNavigator) {
    return "";
  }
  const uaData = navigator.userAgentData;
  if (uaData && Array.isArray(uaData.brands)) {
    return uaData.brands.map(({
      brand,
      version
    }) => `${brand}/${version}`).join(" ");
  }
  // `navigator` can exist with an absent `userAgent` on non-browser runtimes
  // (Node ≥21, Deno, edge workers expose a partial Navigator), so the
  // `hasNavigator` guard alone isn't enough — coalesce to avoid a
  // module-load crash on `userAgent.includes(...)` below.
  return navigator.userAgent ?? "";
}
function getPlatform() {
  if (!hasNavigator) {
    return "";
  }
  const uaData = navigator.userAgentData;
  if (uaData?.platform) {
    return uaData.platform;
  }
  return navigator.platform ?? "";
}
const nav = getNavigatorData();
const platform = getPlatform();
const userAgent = getUserAgent();
export const isAndroid = hasNavigator && /android/i.test(platform) || /android/i.test(userAgent);
export const isJSDOM = userAgent.includes("jsdom/");

/**
 * happy-dom sets a user-agent beginning with "Mozilla/5.0 (X11; Linux x64) ..."
 * and does NOT include "jsdom/". We also treat happy-dom as JSDOM-ish because
 * it shares the same limitations (no real focus-visible, no real layout).
 */
const isHappyDOM = userAgent.includes("HappyDOM");

/**
 * Umbrella flag: true in either jsdom or happy-dom. Code that guards on
 * test-env limitations (e.g. `matches(':focus-visible')` throwing) should
 * use this.
 */
export const isTestEnv = isJSDOM || isHappyDOM;
export const isIOS = nav.platform === "MacIntel" && nav.maxTouchPoints > 1 ? true : /iP(hone|ad|od)|iOS/.test(nav.platform);
export const isMac = hasNavigator && platform.toLowerCase().startsWith("mac") && !navigator.maxTouchPoints;

/**
 * Safari detection — mirrors `@base-ui/utils/detectBrowser`'s `isSafari`.
 * Uses `navigator.vendor` which is "Apple Computer, Inc." in Safari and
 * empty / different in Chrome/Firefox/Edge.
 */
export const isSafari = hasNavigator && /apple/i.test(navigator.vendor ?? "");

/**
 * WebKit engine detection — mirrors `@base-ui/utils/detectBrowser`'s
 * `isWebKit`. Matches Safari AND other WebKit-shell browsers (WKWebView,
 * standalone iOS PWAs) without matching Chromium-based browsers (which
 * keep "AppleWebKit" in their UA for historical compat).
 */
export const isWebKit = hasNavigator && /AppleWebKit/.test(userAgent) && !/Edg|Chrome|Chromium|Firefox/.test(userAgent);
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