工具函数

判断类型

function typeOf(obj) {
  const toString = Object.prototype.toString;
  const map = {
    '[object Boolean]': 'boolean',
    '[object Number]': 'number',
    '[object String]': 'string',
    '[object Function]': 'function',
    '[object Array]': 'array',
    '[object Date]': 'date',
    '[object RegExp]': 'regExp',
    '[object Undefined]': 'undefined',
    '[object Null]': 'null',
    '[object Object]': 'object'
  };
  return map[toString.call(obj)];
}

判断运行平台

export function os () {
  const ua = navigator.userAgent
  const isWindowsPhone = /(?:Windows Phone)/.test(ua)
  const isSymbian = /(?:SymbianOS)/.test(ua) || isWindowsPhone
  const isAndroid = /(?:Android)/.test(ua)
  const isFireFox = /(?:Firefox)/.test(ua)
  // isChrome = /(?:Chrome|CriOS)/.test(ua)
  const isTablet = /(?:iPad|PlayBook)/.test(ua) || (isAndroid && !/(?:Mobile)/.test(ua)) || (isFireFox && /(?:Tablet)/.test(ua))
  const isPhone = /(?:iPhone)/.test(ua) && !isTablet
  const isPc = !isPhone && !isAndroid && !isSymbian
  return {
    isTablet: isTablet,
    isPhone: isPhone,
    isAndroid: isAndroid,
    isPc: isPc
  }
}