Browser detection in JavaScript? [duplicate]

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清酒与你

2020-11-22 00:37

Since Internet Explorer 11 (IE11+) came out and is not using the tag name of MSIE anymore I came up with a variance of an older detection function:

navigator.sayswho= (function(){
    var N= navigator.appName, ua= navigator.userAgent, tem;

    // if IE11+
    if (new RegExp("Trident/.*rv:([0-9]{1,}[\.0-9]{0,})").exec(ua) !== null) {
        var M= ["Internet Explorer"];
        if(M && (tem= ua.match(/rv:([0-9]{1,}[\.0-9]{0,})/))!= null) M[2]= tem[1];
        M= M? [M[0], M[2]]: [N, navigator.appVersion,'-?'];
        return M;
    }

    var M= ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i);
    if(M && (tem= ua.match(/version\/([\.\d]+)/i))!= null) M[2]= tem[1];
    M= M? [M[1], M[2]]: [N, navigator.appVersion,'-?'];
    return M;
})();

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清歌不尽

2020-11-22 00:37

You could use the jQuery library to detect the browser version.

Example:

jQuery.browser.version

However, this only makes sense if you are also using other functions of jQuery. Adding an entire library just to detect the browser seems like overkill to me.

More information: http://api.jquery.com/jQuery.browser/

(you have to scroll down a bit)

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轮回少年

2020-11-22 00:37

Below code snippet will show how how you can show UI elemnts depends on IE version and browser

$(document).ready(function () {

var msiVersion = GetMSIieversion();
if ((msiVersion <= 8) && (msiVersion != false)) {

    //Show UI elements specific to IE version 8 or low

    } else {
    //Show UI elements specific to IE version greater than 8 and for other browser other than IE,,ie..Chrome,Mozila..etc
    }
}
);

Below code will give how we can get IE version

function GetMSIieversion() {

var ua = window.navigator.userAgent;
var msie = ua.indexOf('MSIE ');
if (msie > 0) {
    // IE 10 or older => return version number
    return parseInt(ua.substring(msie + 5, ua.indexOf('.', msie)), 10);
}

var trident = ua.indexOf('Trident/');
if (trident > 0) {
    // IE 11 => return version number
    var rv = ua.indexOf('rv:');
    return parseInt(ua.substring(rv + 3, ua.indexOf('.', rv)), 10);
}

var edge = ua.indexOf('Edge/');
if (edge > 0) {
    // Edge (IE 12+) => return version number
    return parseInt(ua.substring(edge + 5, ua.indexOf('.', edge)), 10);
}

// other browser like Chrome,Mozila..etc
return false;

}

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庸人自扰

2020-11-22 00:38

navigator.sayswho= (function(){
    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 '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').replace('Edg ', 'Edge ');            
    }
    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(' ');
})();

As the name implies, this will tell you the name and version number supplied by the browser.

It is handy for sorting test and error results, when you are testing new code on multiple browsers.

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有刺的猬

2020-11-22 00:39

This tells you all the details about your browser and the version of it.

<!DOCTYPE html>
<html>
<body>
<div id="example"></div>

<script>

txt = "<p>Browser CodeName: " + navigator.appCodeName + "</p>";
txt+= "<p>Browser Name: " + navigator.appName + "</p>";
txt+= "<p>Browser Version: " + navigator.appVersion + "</p>";
txt+= "<p>Cookies Enabled: " + navigator.cookieEnabled + "</p>";
txt+= "<p>Platform: " + navigator.platform + "</p>";
txt+= "<p>User-agent header: " + navigator.userAgent + "</p>";
txt+= "<p>User-agent language: " + navigator.systemLanguage + "</p>";

document.getElementById("example").innerHTML=txt;

</script>

</body>
</html>

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萌比男神i

2020-11-22 00:39

This little library may help you. But be aware that browser detection is not always the solution.

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