Created
December 22, 2015 00:13
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Guess the browser with JavaScript
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>browser</title> | |
| </head> | |
| <body> | |
| <script type="text/javascript"> | |
| var nVer = navigator.appVersion; | |
| var nAgt = navigator.userAgent; | |
| var browserName = navigator.appName; | |
| var fullVersion = '' + parseFloat(navigator.appVersion); | |
| var majorVersion = parseInt(navigator.appVersion, 10); | |
| var nameOffset, verOffset, ix; | |
| // In Opera, the true version is after "Opera" or after "Version" | |
| if ((verOffset = nAgt.indexOf("Opera")) != -1) { | |
| browserName = "Opera"; | |
| fullVersion = nAgt.substring(verOffset + 6); | |
| if ((verOffset = nAgt.indexOf("Version")) != -1) | |
| fullVersion = nAgt.substring(verOffset + 8); | |
| } | |
| // In MSIE, the true version is after "MSIE" in userAgent | |
| else if ((verOffset = nAgt.indexOf("MSIE")) != -1) { | |
| browserName = "Microsoft Internet Explorer"; | |
| fullVersion = nAgt.substring(verOffset + 5); | |
| } | |
| // In Chrome, the true version is after "Chrome" | |
| else if ((verOffset = nAgt.indexOf("Chrome")) != -1) { | |
| browserName = "Chrome"; | |
| fullVersion = nAgt.substring(verOffset + 7); | |
| } | |
| // In Safari, the true version is after "Safari" or after "Version" | |
| else if ((verOffset = nAgt.indexOf("Safari")) != -1) { | |
| browserName = "Safari"; | |
| fullVersion = nAgt.substring(verOffset + 7); | |
| if ((verOffset = nAgt.indexOf("Version")) != -1) | |
| fullVersion = nAgt.substring(verOffset + 8); | |
| } | |
| // In Firefox, the true version is after "Firefox" | |
| else if ((verOffset = nAgt.indexOf("Firefox")) != -1) { | |
| browserName = "Firefox"; | |
| fullVersion = nAgt.substring(verOffset + 8); | |
| } | |
| // In most other browsers, "name/version" is at the end of userAgent | |
| else if ((nameOffset = nAgt.lastIndexOf(' ') + 1) < (verOffset = nAgt.lastIndexOf('/'))) { | |
| browserName = nAgt.substring(nameOffset, verOffset); | |
| fullVersion = nAgt.substring(verOffset + 1); | |
| if (browserName.toLowerCase() == browserName.toUpperCase()) { | |
| browserName = navigator.appName; | |
| } | |
| } | |
| // trim the fullVersion string at semicolon/space if present | |
| if ((ix = fullVersion.indexOf(";")) != -1) | |
| fullVersion = fullVersion.substring(0, ix); | |
| if ((ix = fullVersion.indexOf(" ")) != -1) | |
| fullVersion = fullVersion.substring(0, ix); | |
| majorVersion = parseInt('' + fullVersion, 10); | |
| if (isNaN(majorVersion)) { | |
| fullVersion = '' + parseFloat(navigator.appVersion); | |
| majorVersion = parseInt(navigator.appVersion, 10); | |
| } | |
| document.write('' + 'Browser name = ' + browserName + '<br>' + 'Full version = ' + fullVersion + '<br>' + 'Major version = ' + majorVersion + '<br>' + 'navigator.appName = ' + navigator.appName + '<br>' + 'navigator.userAgent = ' + navigator.userAgent + '<br>'); | |
| </script> | |
| </body> | |
| </html> |
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