禅悦

/**
 * 判断是否为移动设备
 * @returns {boolean}
 */
export function isMobile() {
	console.log(navigator.userAgent)
  return isAndroid() || isIOS();
}

/**
 * 判断是否为 Android 设备
 * @returns {boolean}
 */
export function isAndroid() {
  return /Android/.test(navigator.userAgent);
}

/**
 * 判断是否为 iOS 设备
 * @param {Object} constraint - 约束条件，如版本等
 * @returns {boolean}
 */
export function isIOS(constraint) {
  let answer = ios();
  if (!constraint || !answer) return answer;
  const version = parseFloat(navigator.userAgent.slice(navigator.userAgent.indexOf('Version/') + 8));
  if (constraint?.below) answer = version < constraint.below;
  if (answer && constraint?.atLeast) answer = version >= constraint.atLeast;
  return answer;
}

/**
 * 判断是否为 Chrome 浏览器
 * @returns {boolean}
 */
export function isChrome() {
  return /Chrome\//.test(navigator.userAgent);
}

/**
 * 判断是否为 Firefox 浏览器
 * @returns {boolean}
 */
export function isFirefox() {
  return /Firefox/.test(navigator.userAgent);
}

/**
 * 获取 Firefox 浏览器的主要版本号
 * @returns {number | undefined}
 */
export function getFirefoxMajorVersion() {
  const match = /Firefox\/(\d*)/.exec(navigator.userAgent);
  return match && match.length > 1 ? parseInt(match[1]) : undefined;
}

/**
 * 判断是否为在 iOS 设备上的 Chrome 浏览器
 * @returns {boolean}
 */
export function isIOSChrome() {
  return /CriOS/.test(navigator.userAgent);
}

/**
 * 判断是否为触摸设备
 * @returns {boolean}
 */
export function isTouchDevice() {
  return !hasMouse();
}

/**
 * 判断是否为 iPad 设备
 * @returns {boolean}
 */
export function isIPad() {
  return navigator?.maxTouchPoints > 2 && /iPad|Macintosh/.test(navigator.userAgent);
}

/**
 * 检测设备支持的特性
 * @returns {readonly string[]}
 */
export function features() {
  const features = [];
  if (typeof WebAssembly === 'object' &&
    typeof WebAssembly.validate === 'function' &&
    WebAssembly.validate(Uint8Array.from([0, 97, 115, 109, 1, 0, 0, 0]))) {
    features.push('wasm');
    if (sharedMemoryTest()) {
      features.push('sharedMem');
      const sourceWithSimd = Uint8Array.from(/* ... */); // SIMD 源代码
      if (WebAssembly.validate(sourceWithSimd)) features.push('simd');
    }
  }
  return Object.freeze(features);
}

// 用于缓存的辅助函数
function memoize(fn) {
  let cached = null;
  return () => cached !== null ? cached : (cached = fn());
}

// 私有辅助函数
function ios() {
  return /iPhone|iPod/.test(navigator.userAgent) || isIPad();
}

function hasMouse() {
  return window.matchMedia('(hover: hover) and (pointer: fine)').matches;
}

function sharedMemoryTest() {
  // ...具体实现
}

// 使用示例
console.log('Is Mobile:', isMobile());
console.log('Is Chrome:', isChrome());
console.log('Is Firefox:', isFirefox());
console.log('Firefox Major Version:', getFirefoxMajorVersion());
console.log('Is iOS Chrome:', isIOSChrome());
console.log('Is Touch Device:', isTouchDevice());
console.log('Is iPad:', isIPad());
console.log('Features:', features());