JS获取浏览器版本信息

/**
 * 获取浏览器信息
 * @returns {Object} {name: String, version: String}
 */
export function getBrowserInfo() {
  const browserInfo = {}
  const str = navigator.userAgent.toLowerCase()
  const isIE = str.includes('compatible') && str.includes('msie') // 判断是否IE<11浏览器
  const isIE11 = str.includes('trident') && str.includes('rv:11.0')
  const isEdge = str && str.includes('edg/')
  if (isIE) {
    const reg = new RegExp('msie (\\d+\\.\\d+);')
    reg.test(str)
    const ieVersion = parseInt(RegExp['$1'])
    browserInfo.name = 'ie'
    browserInfo.version = ieVersion > 7 ? `ie${ieVersion}` : '<ie7'
  } else if (isIE11) {
    browserInfo.name = 'ie'
    browserInfo.version = 'ie11'
  } else if (isEdge) {
    const reg = /(edg).*?([\d.]+)/
    const info = str.match(reg)
    browserInfo.name = info[1]
    browserInfo.version = info[2]
  } else {
    const reg = /(edg|chrome|opera|firefox|version).*?([\d.]+)/
    const info = str.match(reg)
    browserInfo.name = info[1].replace(/version/, "'safari")// name---类型
    browserInfo.version = info[2]// version---版本
  }
  return browserInfo
}