jquery query browser version

How to use jQuery to query the browser version

In different browsers, the ways of rendering web pages are also different, so when developing web applications, different processing needs to be carried out according to different browser versions. jQuery provides a simple method to query the browser version, allowing developers to easily determine the browser version used by the user and handle it accordingly. In this article, we will explain how to query the browser version using jQuery.

Step 1: Introduce the jQuery library

First, we need to introduce the jQuery library into the web page. You can use the following code to download the latest version of the library file from the jQuery official website and introduce it into your project.

<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>

Step 2: Use the $.browser object to query the browser version

jQuery provides an object specifically used to query the browser version, which is the $.browser object. It contains some properties and methods used to determine the browser type and version. However, it should be noted that $.browser has been deprecated since jQuery 1.9, so you need to pay attention to determine the jQuery version when using it.

// 检测浏览器版本是否是IE8及以下版本
if($.browser && parseInt($.browser.version) <= 8){
   alert("您使用的是IE8或以下版本的浏览器");
}

The above code can simply detect whether the user is using IE8 and below browsers. It should be noted that since $.browser has been abandoned, it is recommended to use the more standardized navigator.userAgent to query the browser version.

Step 3: Use the navigator.userAgent object to query the browser version

navigator.userAgent is a string containing browser type, version and other information. By detecting it, we can get the browser type and version used by the user. The user's browser version can be obtained through the following code:

// 获取浏览器版本信息
var browser=navigator.userAgent.toLowerCase();
if(/msie/.test(browser)){
   var version=browser.match(/msie [d]/)[0].replace("msie ","");
   alert("您使用的是IE浏览器，版本号为"+version);
}else if(/firefox/.test(browser)){
   var version=browser.match(/firefox/[d]/)[0].replace("firefox/","");
   alert("您使用的是火狐浏览器，版本号为"+version);
}else if(/chrome/.test(browser)){
   var version=browser.match(/chrome/[d]/)[0].replace("chrome/","");
   alert("您使用的是谷歌浏览器，版本号为"+version);
}else if(/opera/.test(browser)){
   var version=browser.match(/opera.([d]+.[d]+)/)[1];
   alert("您使用的是Opera浏览器，版本号为"+version);
}else if(/safari/.test(browser)){
   var version=browser.match(/version/([d]+)/)[1];
   alert("您使用的是Safari浏览器，版本号为"+version);
}

The above code can identify and query the version number of IE, Firefox, Chrome, Opera and Safari browsers, and pop up the corresponding prompt in the browser information.

Summary

Through the introduction of this article, we have learned how to use jQuery to query the browser version when developing web applications. Using jQuery allows developers to easily determine the browser version used by the user and make corresponding processing according to different versions. In actual development, you need to pay attention to the differences in jQuery versions and the abandonment of the $.browser object, as well as the differences in rendering web pages in different browsers. At the same time, we can also directly query the browser version through the navigator.userAgent object to deepen our understanding and application of JavaScript code.

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