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
navigator.sayswho= (function(){ var ua= navigator.userAgent, tem, M= ua.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || []; if(/trident/i.test(M[1])){ tem= /\brv[ :]+(\d+)/g.exec(ua) || []; return 'IE '+(tem[1] || ''); } if(M[1]=== 'Chrome'){ tem= ua.match(/\b(OPR|Edge)\/(\d+)/); if(tem!= null) return tem.slice(1).join(' ').replace('OPR', 'Opera'); } M= M[2]? [M[1], M[2]]: [navigator.appName, navigator.appVersion, '-?']; if((tem= ua.match(/version\/(\d+)/i))!= null) M.splice(1, 1, tem[1]); return M.join(' '); })(); console.log(navigator.sayswho); // outputs: `Chrome 62`
其他回答
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>'
)
这结合了kennebec的(K)答案和Hermann Ingjaldsson的(H)答案:
维护原始答案的最小代码。(K) 使用Microsoft Edge (K) 扩展导航器对象，而不是创建新的变量/对象。(K) 将浏览器版本和名称分离为独立的子对象。(H)
navigator.browserSpecs = (function(){ var ua = navigator.userAgent, tem, M = ua.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || []; if(/trident/i.test(M[1])){ tem = /\brv[ :]+(\d+)/g.exec(ua) || []; return {name:'IE',version:(tem[1] || '')}; } if(M[1]=== 'Chrome'){ tem = ua.match(/\b(OPR|Edge)\/(\d+)/); if(tem != null) return {name:tem[1].replace('OPR', 'Opera'),version:tem[2]}; } M = M[2]? [M[1], M[2]]: [navigator.appName, navigator.appVersion, '-?']; if((tem = ua.match(/version\/(\d+)/i))!= null) M.splice(1, 1, tem[1]); return {name:M[0], version:M[1]}; })(); console.log(navigator.browserSpecs); //Object { name: "Firefox", version: "42" } if (navigator.browserSpecs.name == 'Firefox') { // Do something for Firefox. if (navigator.browserSpecs.version > 42) { // Do something for Firefox versions greater than 42. } } else { // Do something for all other browsers. }
为此，您需要检查navigator的值。appVersion或navigator.userAgent 尝试使用:
console.log(navigator.appVersion)
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。
