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Get browser name in JavaScript

The userAgent property inside navigator object returns the value of the user-agent header sent by the browser to the server. We can use this property to find out the browser being used.

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console.log(navigator.userAgent);

//Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 Safari/537.36
function getBrowserName() { 
    if((navigator.userAgent.indexOf("Opera") || navigator.userAgent.indexOf('OPR')) != -1 ) {
        return 'Opera';
    } else if(navigator.userAgent.indexOf("Chrome") != -1 ) {
        return 'Chrome';
    } else if(navigator.userAgent.indexOf("Safari") != -1) {
        return 'Safari';
    } else if(navigator.userAgent.indexOf("Firefox") != -1 ){
        return 'Firefox';
    } else if((navigator.userAgent.indexOf("MSIE") != -1 ) || (!!document.documentMode == true )) {
        return 'Internet Explorer';
    } else {
        return 'Not sure!';
    }
}
getBrowserName(); //Chromw
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