获取各浏览器的版本号

browser: {
        chrome: /chrome/(d+.d+)/i.test(navigator.userAgent) ? +RegExp["x241"] : undefined,
        firefox: /firefox/(d+.d+)/i.test(navigator.userAgent) ? +RegExp["x241"] : undefined,
        ie: /msie (d+.d+)|Trident/i.test(navigator.userAgent) ? (document.documentMode || +RegExp["x241"]) : undefined,
        isGecko: /gecko/i.test(navigator.userAgent) && !/like gecko/i.test(navigator.userAgent),
        isWebkit: /webkit/i.test(navigator.userAgent),
        opera: /opera(/| )(d+(.d+)?)(.+?(version/(d+(.d+)?)))?/i.test(navigator.userAgent) ? +(RegExp["x246"] || RegExp["x242"]) : undefined,
        safari: /(d+.d)?(?:.d)?s+safari/?(d+.d+)?/i.test(navigator.userAgent) && !/chrome/i.test(navigator.userAgent) ? +(RegExp["x241"] || RegExp["x242"]) : undefined,
        isSogouIE: ((navigator.userAgent.toLowerCase()).indexOf("msie") > 0) && ((navigator.userAgent.toLowerCase()).indexOf("se") > 0) && ((navigator.userAgent.toLowerCase()).indexOf("360se") == -1),
        isBaidu: /BIDUBrowser/i.test(navigator.userAgent),
        edge: /edge/(d+)/i.test(navigator.userAgent) ? +RegExp["x241"] : undefined
    }