js获取控件版本

function getBrowserVersion() {
    var userAgent = navigator.userAgent;
    var match = userAgent.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];
    var browser = match[1] || "";
    var version = match[2] || "0";
    
    var renderingEngine = {
        'chrome': 'WebKit', 'safari': 'WebKit', 'firefox': 'Gecko',
        'msie': 'Trident', 'trident': 'Trident'
    }[browser.toLowerCase()];

    if (/trident/i.test(browser)) {
        match = userAgent.match(/rv:(\d+)/);
        browser = 'IE';
        version = match[1];
    }
    console.log(browser + " version: " + version);
    return { browser: browser, version: version };
}

getBrowserVersion();

console.log(Lodash.VERSION); // 如果使用Lodash库，并且它暴露了VERSION属性