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How can you detect the version of a browser?


You can see what the browser says, and use that information for logging or testing multiple browsers.

navigator.sayswho= (function(){
    var ua= navigator.userAgent, tem,
    M= ua.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];
        tem=  /\brv[ :]+(\d+)/g.exec(ua) || [];
        return 'IE '+(tem[1] || '');
    if(M[1]=== 'Chrome'){
        tem= ua.match(/\b(OPR|Edge)\/(\d+)/);
        if(tem!= null) return tem.slice(1).join(' ').replace('OPR', 'Opera');
    M= M[2]? [M[1], M[2]]: [navigator.appName, navigator.appVersion, '-?'];
    if((tem= ua.match(/version\/(\d+)/i))!= null) M.splice(1, 1, tem[1]);
    return M.join(' ');


This is an improvement on Kennebec’s answer.

function get_browser() { var ua=navigator.userAgent,tem,M=ua.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || []; if(/trident/i.test(M[1])){ tem=/\brv[ :]+(\d+)/g.exec(ua) || []; return {name:‘IE’,version :( tem[1]||)}; } if(M[1]===‘Chrome’){ tem=ua.match(/\bOPR|Edge\/(\d+)/) if(tem!=null) {return {name:‘Opera’, version:tem[1]};} } M=M[2]? [M[1], M[2]]: [navigator.appName, navigator.appVersion, '-?']; if((tem=ua.match(/version\/(\d+)/i))!=null) {M.splice(1,1,tem[1]);} return { name: M[0], version: M[1] }; }

And then you just run:

var browser=get_browser();
// = 'Chrome'
// browser.version = '40'

This way you can shield yourself from the obscurity of the code.

Posted in Javascript. Tagged with , , , .

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