JavaScript: Browser Name and Version

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgQjpkPPDbyAWy1Qx9uxcF4UVYu_rBV7n5s4-itpZYAKd1UJD8MZdu3pp36aU8juDyj8TMJkHM7h_WvIF_k-kndTHa27EKT9hKmCeP2K8tBcDdZlrVKJby26fQS7MA8Q0AnutMpVPazytk/s1600/grey_plaid.jpg https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjeQNaW9hATJM65s9islJCdXDKxCrX_eHX9QtpSajz8OxBOzEAKZAWyCaDFxXjqf6EhLIl8nucGzx5b_3AqpSh03YjlTVhIr-4AJ_nBX0j3keInsvc2cNTrKJorwYN6oSGCnbUOzztUDz4/s1600/grey_plaid.png

Browser Detection

To establish the actual name of the user's Web browser, we can use the navigator.appName and navigator.userAgent properties.

navigator.appName = Netscape
navigator.userAgent = Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

Firefox (and some other browsers) may return the string Netscape as the value of navigator.appName for compatibility with Netscape Navigator.
However, that navigator.userAgent may be spoofed, too – that is, clients may substitute virtually any string for their userAgent.

browserName = Netscape
majorVersion = 5
fullVersion = 5

visit www.javascripter.net/faq/browsern.htm for the script.

:P

//here is the source code that performed the browser detection:

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(''
 +'browserName  = '+browserName+'<br>'
 +'majorVersion = '+majorVersion+'<br>'
 +'fullVersion  = '+fullVersion+'<br>'
 +'navigator.appName = '+navigator.appName+'<br>'
 +'navigator.userAgent = '+navigator.userAgent+'<br>'
)

Script Hasil Modif

function detectBrowser(){
  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;

  if((verOffset=nAgt.indexOf("Opera"))!=-1){
    browserName="Opera"; 
    fullVersion=nAgt.substring(verOffset+6);
    if((verOffset=nAgt.indexOf("Version"))!=-1){fullVersion=nAgt.substring(verOffset+8)}
  }else if((verOffset=nAgt.indexOf("MSIE"))!=-1){
    browserName="Microsoft Internet Explorer"; 
    fullVersion=nAgt.substring(verOffset+5);
  }else if((verOffset=nAgt.indexOf("Chrome"))!=-1){
    browserName="Chrome"; 
    fullVersion=nAgt.substring(verOffset+7);
  }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)}
  }else if((verOffset=nAgt.indexOf("Firefox"))!=-1){
    browserName="Firefox"; 
    fullVersion=nAgt.substring(verOffset+8);
  }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}
  }
  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);
  }
  var tulis=browserName+' '+majorVersion;
  return tulis;
}

document.write(detectBrowser());

Netscape 5