Js Code to determine the browser type IE, FF, Opera, Safari, chrome, and version _ javascript skills

This article mainly shares the judgment IE, FF, Opera, Safari, Chrome and other browsers and versions of the two methods, need friends can refer to the version of the ie10-ie11 because of the problem, no longer support document. all judgment, so the ie judgment function should be rewritten.

function isIE() { //ie?      if (!!window.ActiveXObject || "ActiveXObject" in window)        return true;      else        return false;    }

First, only the browser is differentiated, regardless of the version

The Code is as follows:

Function myBrowser (){
Var userAgent = navigator. userAgent; // obtain the userAgent string of the browser.
Var isOpera = userAgent. indexOf ("Opera")>-1;
If (isOpera ){
Return "Opera"
}; // Determine whether the operabrowser is used
If (userAgent. indexOf ("Firefox")>-1 ){
Return "FF ";
} // Determine if the Firefox browser is used
If (userAgent. indexOf ("Chrome")>-1 ){
Return "Chrome ";
}
If (userAgent. indexOf ("Safari")>-1 ){
Return "Safari ";
} // Determine whether the browser is Safari
If (userAgent. indexOf ("compatible")>-1 & userAgent. indexOf ("MSIE")>-1 &&! IsOpera ){
Return "IE ";
}; // Determines whether the IE browser is used
}

// The following is a call to the above function
Var mb = myBrowser ();
If ("IE" = mb ){
Alert ("I am IE ");
}
If ("FF" = mb ){
Alert ("I am Firefox ");
}
If ("Chrome" = mb ){
Alert ("Chrome ");
}
If ("Opera" = mb ){
Alert ("My name is Opera ");
}
If ("Safari" = mb ){
Alert ("I am Safari ");
}

Second, differentiate browsers and consider IE5.5 6 7 8

The Code is as follows:

Function myBrowser (){
Var userAgent = navigator. userAgent; // obtain the userAgent string of the browser.
Var isOpera = userAgent. indexOf ("Opera")>-1; // determines whether the operabrowser is used.
Var isIE = userAgent. indexOf ("compatible")>-1 & userAgent. indexOf ("MSIE")>-1 &&! IsOpera; // determines whether the IE browser is used
Var isFF = userAgent. indexOf ("Firefox")>-1; // determine whether the Firefox browser is used
Var isSafari = userAgent. indexOf ("Safari")>-1; // determine whether the browser is Safari
If (isIE ){
Var IE5 = IE55 = IE6 = IE7 = IE8 = false;
Var reIE = new RegExp ("MSIE (\ d + \. \ d + );");
ReIE. test (userAgent );
Var fIEVersion = parseFloat (RegExp ["$1"]);
IE55 = fIEVersion = 5.5;
IE6 = fIEVersion = 6.0;
IE7 = fIEVersion = 7.0;
IE 8 = fIEVersion = 8.0;
If (IE55 ){
Return "IE55 ";
}
If (IE6 ){
Return "IE6 ";
}
If (IE7 ){
Return "IE7 ";
}
If (IE8 ){
Return "IE8 ";
}
} // IsIE end
If (isFF ){
Return "FF ";
}
If (isOpera ){
Return "Opera ";
}
} // MyBrowser () end
// The following is a call to the above function
If (myBrowser () = "FF "){
Alert ("I am Firefox ");
}
If (myBrowser () = "Opera "){
Alert ("My name is Opera ");
}
If (myBrowser () = "Safari "){
Alert ("I am Safari ");
}
If (myBrowser () = "IE55 "){
Alert ("I'm IE5.5 ");
}
If (myBrowser () = "IE6 "){
Alert ("I'm IE6 ");
}
If (myBrowser () = "IE7 "){
Alert ("I am IE7 ");
}
If (myBrowser () = "IE8 "){
Alert ("I am IE8 ");
}

The following is a javascript code used to determine whether the browser is IE.

The principle is based on the difference between IE and the standard browser in handling the toString method of arrays. For the standard browser, if the last character in the array is a comma, The JS engine will automatically remove it.

Script var ie =! -[1,]; alert (ie); script
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