我一直在寻找可以检测访问网站的用户使用的是火狐3还是火狐4的代码。我所找到的只是检测浏览器类型而不是版本的代码。
如何检测这样的浏览器版本?
当前回答
这是对Kennebec答案的改进。
mbrowser=function(){
this.spec_string= navigator.userAgent;
this.name= this.get_name();
this.version= this.get_version();
};
mbrowser.prototype.get_name=function(){
var spec_string=this.spec_string;
var matches=spec_string.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];
// Work with the matches.
matches=matches[2]? [matches[1], matches[2]]: [navigator.appName, navigator.appVersion, '-?'];
// Trident.
if(/trident/i.test(matches[1])){
var temp=/\brv[ :]+(\d+)/g.exec(spec_string) || [];
return 'IE';
}
// Chrome.
if(matches[1]==='Chrome'){
var temp=spec_string.match(/\bOPR|Edge\/(\d+)/)
if(temp!=null) {return 'Opera';}
}
if((temp=spec_string.match(/version\/(\d+)/i))!=null){
matches.splice(1,1,temp[1]);
}
var name=matches[0];
return name;
};
mbrowser.prototype.get_version=function(){
var spec_string=this.spec_string;
var matches=spec_string.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];
// Work with the matches.
matches=matches[2]? [matches[1], matches[2]]: [navigator.appName, navigator.appVersion, '-?'];
// Trident.
if(/trident/i.test(matches[1])){
var temp=/\brv[ :]+(\d+)/g.exec(spec_string) || [];
var version=(temp[1]||'');
return version;
}
// Chrome.
if(matches[1]==='Chrome'){
var temp=spec_string.match(/\bOPR|Edge\/(\d+)/)
var version=temp[1];
if(temp!=null) {return version;}
}
if((temp=spec_string.match(/version\/(\d+)/i))!=null){
matches.splice(1,1,temp[1]);
}
var version=matches[1];
return version;
};
// m=module.
var browser=new mbrowser();
console.log(browser.name); // Chrome
console.log(browser.version); // 109
这段代码从spec_string (navigator.userAgent)中推导出浏览器名称和编号。但是有各种各样的spec_string，它们有各自的浏览器名称和编号。我没有条件去检查，但是其中的一小部分。如果你能发布一个你知道的浏览器名称和编号的spec_string，那就太好了。然后我可以相应地更新代码。
然后，我将按照以下方式慢慢地构建spec_string项的列表。
'spec_string1'=>[name,number],
'spec_string2'=>[name,number],
以后，无论何时对代码进行更改，都可以在所有已知的spec_string转换上自动对其进行测试。
我们可以一起做这件事。
其他回答
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 15+, the true version is after "OPR/"
if ((verOffset = nAgt.indexOf("OPR/")) != -1) {
browserName = "Opera";
fullVersion = nAgt.substring(verOffset + 4);
}
// In older Opera, the true version is after "Opera" or after "Version"
else 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 = "Google 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 = "Mozilla 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);
}
我写这个是为了满足我的需要。
它可以获取信息，比如是否是移动设备或是否有视网膜显示器
试一试
var nav = {
isMobile:function(){
return (navigator.userAgent.match(/iPhone|iPad|iPod|Android|BlackBerry|Opera Mini|IEMobile/i) != null);
},
isDesktop:function(){
return (navigator.userAgent.match(/iPhone|iPad|iPod|Android|BlackBerry|Opera Mini|IEMobile/i) == null);
},
isAndroid: function() {
return navigator.userAgent.match(/Android/i);
},
isBlackBerry: function() {
return navigator.userAgent.match(/BlackBerry/i);
},
isIOS: function() {
return navigator.userAgent.match(/iPhone|iPad|iPod/i);
},
isOpera: function() {
return navigator.userAgent.match(/Opera Mini/i);
},
isWindows: function() {
return navigator.userAgent.match(/IEMobile/i);
},
isRetina:function(){
return window.devicePixelRatio && window.devicePixelRatio > 1;
},
isIPad:function(){
isIPad = (/ipad/gi).test(navigator.platform);
return isIPad;
},
isLandscape:function(){
if(window.innerHeight < window.innerWidth){
return true;
}
return false;
},
getIOSVersion:function(){
if(this.isIOS()){
var OSVersion = navigator.appVersion.match(/OS (\d+_\d+)/i);
OSVersion = OSVersion[1] ? +OSVersion[1].replace('_', '.') : 0;
return OSVersion;
}
else
return false;
},
isStandAlone:function(){
if(_.is(navigator.standalone))
return navigator.standalone;
return false;
},
isChrome:function(){
var isChrome = (/Chrome/gi).test(navigator.appVersion);
var isSafari = (/Safari/gi).test(navigator.appVersion)
return isChrome && isSafari;
},
isSafari:function(){
var isSafari = (/Safari/gi).test(navigator.appVersion)
var isChrome = (/Chrome/gi).test(navigator.appVersion)
return !isChrome && isSafari;
}
}
这里有更好的兼容性@kennebec snippet; 将返回浏览器名称和版本(返回72而不是72.0.3626.96)。
在Safari, Chrome, Opera, Firefox, IE, Edge, UCBrowser上测试，也在移动设备上测试。
function browser() {
var userAgent = navigator.userAgent,
match = userAgent.match(/(opera|chrome|crios|safari|ucbrowser|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [],
result = {},
tem;
if (/trident/i.test(match[1])) {
tem = /\brv[ :]+(\d+)/g.exec(userAgent) || [];
result.name = "Internet Explorer";
} else if (match[1] === "Chrome") {
tem = userAgent.match(/\b(OPR|Edge)\/(\d+)/);
if (tem && tem[1]) {
result.name = tem[0].indexOf("Edge") === 0 ? "Edge" : "Opera";
}
}
if (!result.name) {
tem = userAgent.match(/version\/(\d+)/i); // iOS support
result.name = match[0].replace(/\/.*/, "");
if (result.name.indexOf("MSIE") === 0) {
result.name = "Internet Explorer";
}
if (userAgent.match("CriOS")) {
result.name = "Chrome";
}
}
if (tem && tem.length) {
match[match.length - 1] = tem[tem.length - 1];
}
result.version = Number(match[match.length - 1]);
return result;
}
这个页面似乎有一个非常漂亮的代码片段，它只使用appString和appVersion属性作为最后的手段，因为它声称它们在某些浏览器中是不可靠的。 页面上的代码如下:
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 15+, the true version is after "OPR/"
if ((verOffset=nAgt.indexOf("OPR/"))!=-1) {
browserName = "Opera";
fullVersion = nAgt.substring(verOffset+4);
}
// In older Opera, the true version is after "Opera" or after "Version"
else 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>'
)
对于铬浏览器就是这么简单。
版本:navigator.userAgentData.brands[0].version
浏览器名称:navigator.userAgentData.brands[0].brand
