prototype.jsのブラウザ判定
prototype.jsのコードに書いてあったのでメモ。
UserAgent判定
Browser: (function(){ var ua = navigator.userAgent; var isOpera = Object.prototype.toString.call(window.opera) == '[object Opera]'; return { IE: !!window.attachEvent && !isOpera, Opera: isOpera, WebKit: ua.indexOf('AppleWebKit/') > -1, Gecko: ua.indexOf('Gecko') > -1 && ua.indexOf('KHTML') === -1, MobileSafari: /Apple.*Mobile.*Safari/.test(ua) } })(),
各ブラウザの機能
BrowserFeatures: { XPath: !!document.evaluate, SelectorsAPI: !!document.querySelector, ElementExtensions: (function() { var constructor = window.Element || window.HTMLElement; return !!(constructor && constructor.prototype); })(), SpecificElementExtensions: (function() { if (typeof window.HTMLDivElement !== 'undefined') return true; var div = document.createElement('div'); var form = document.createElement('form'); var isSupported = false; if (div['__proto__'] && (div['__proto__'] !== form['__proto__'])) { isSupported = true; } div = form = null; return isSupported; })() },