Javascript browser user agent detects how to write a script

This article focuses on "javascript browser user agent detection script how to write", interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to write a javascript browser user agent detection script.

The following is the complete user agent string detection script, including the detection rendering engine, platform, Windows operating system, mobile devices, and game systems.

Var client = function () {/ / rendering engine var engine = {ie: 0, gecko: 0, webkit: 0, khtml: 0, opera: 0, / / full version number ver: null} / / browser var browser = {/ / main browsers ie: 0, firefox: 0, safari: 0, konq: 0, opera: 0, chrome: 0, / / specific version number ver: null} / / platform, device and operating system var system = {win: false, mac: false, x11: false, / / Mobile device iphone: false, ipod: false, ipad: false, ios: false, android: false, nokiaN: false, winMobile: false, / / Game system wii: false, ps: false}; / / Test rendering engine and browser var ua = navigator.userAgent If (window.opera) {engine.ver = browser.ver = window.opera.version (); engine.opera = browser.opera = parseFloat (engine.ver);} else if (/ AppleWebKit\ / (\ S+) / .test (ua)) {engine.ver = RegExp ["$1"]; engine.webkit = parseFloat (engine.ver); / / determine whether Chroeme or Safari if (/ Chrome\ / (\ S+) / .test (ua)) {browser.ver = RegExp ["$1"] Browser.chrome = parseFloat (browser.ver);} else if (/ Version\ / (\ S+) / .test (ua)) {browser.ver = RegExp ["$1"]; browser.safari = parseFloat (browser.ver);} else {/ / approximately determine the version number var safariVersion = 1; if (engine.webkit)

< 100){ safariVersion = 1; } else if (engine.webkit < 312){ safariVersion = 1.2; } else if (engine.webkit < 412){ safariVersion = 1.3; } else { safariVersion = 2; } browser.safari = browser.ver = safariVersion; } } else if (/KHTML\/(\S+)/.test(ua) || /Konqueror\/([^;]+)/.test(ua)){ engine.ver = browser.ver = RegExp["$1"]; engine.khtml = browser.konq = parseFloat(engine.ver); } else if (/rv:([^\)]+)\) Gecko\/\d{8}/.test(ua)){ engine.ver = RegExp["$1"]; engine.gecko = parseFloat(engine.ver); // 确定是不是Firefox if (/Firefox\/(\S+)/.test(ua)){ browser.ver = RegExp["$1"]; browser.firefox = parseFloat(browser.ver); } } else if (/MSIE ([^;]+)/.test(ua)){ engine.ver = browser.ver = RegExp["$1"]; engine.ie = browser.ie = parseFloat(engine.ver); } // 检测浏览器 browser.ie = engine.ie; browser.opera = engine.opera; // 检测平台 var p = navigator.platform; system.win = p.indexOf("Win") == 0; system.mac = p.indexOf("Mac") == 0; system.x11 = (p == "x11") || (p.indexOf("Linux") == 0); // 检测windows操作系统 if(system.win){ if(/win(?:dows )?([^do]{2})\s?(\d+\.\d+)?/.test(ua)){ if(RegExp["$1"] == "NT"){ switch(RegExp["$2"]){ case "5.0": system.win = "2000"; break; case "5.1": system.win = "XP"; break; case "6.0": system.win = "Vista"; break; case "6.1": system.win = "7"; break; default: system.win = "NT"; break; } } else if(RegExp["$1"] == "9x"){ system.win = "ME"; } else{ system.win = RegExp["$1"]; } } } // 移动设备 system.iphone = ua.indexOf("iPhone") >

-1; system.ipod = ua.indexOf ("iPod") >-1; system.ipad = ua.indexOf ("iPad") >-1; system.nokiaN = ua.indexOf ("NokiaN") >-1; / / windows mobile if (system.win = = "CE") {system.winMobile = system.win;} else if (system.win = "Ph") {if (/ Windows Phone OS (\ dholder.\ d+) / .test (ua)) {system.win = "Phone" System.winMobile = parseFloat (RegExp ["$1"]);}} / detect IOS version if (system.mac & & ua.indexOf ("Mobile") >-1) {if (/ CPU (?: Phone)? OS (\ dink _\ d +) / .test (ua)) {system.ios = parseFloat (RegExp.$1.replace ("_", "."));} else {system.ios = 2 / / can't really detect it, so you can only guess} / / detect Android version if (/ Android (\ d +\.\ d +) / .test (ua)) {system.android = parseFloat (RegExp.$1);} / / Game system system.wii = ua.indexOf ("Wii") >-1; system.ps = / playstation/i.test (ua) / / return these objects return {engine: engine, browser: browser, system: system}; / / console.log (engine); / / console.log (browser); / / console.log (system);} (); now that you have a better understanding of "how to write a javascript browser user agent detection script", you might as well do it! Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!