Prototype1.5.1源代码解读分析-1

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Prototype对象源代码

下面是prototype框架第一段代码：

var Prototype = {

  Version: '1.5.1',

  Browser: {

    IE:     !!(window.attachEvent && !window.opera),

    Opera:  !!window.opera,

    WebKit: navigator.userAgent.indexOf('AppleWebKit/') > -1,

    Gecko:  navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML') == -1

  },

  BrowserFeatures: {

    XPath: !!document.evaluate,

    ElementExtensions: !!window.HTMLElement,

    SpecificElementExtensions:

      (document.createElement('div').__proto__ !==

       document.createElement('form').__proto__)

  ScriptFragment: '<script[^>]*>([\u0001-\uFFFF]*?)</script>',

JSONFilter: /^\/\*-secure-\s*(.*)\s*\*\/\s*$/,

  emptyFunction: function() { },

  K: function(x) { return x }

}

本文转自 netcorner 博客园博客，原文链接： http://www.cnblogs.com/netcorner/archive/2007/08/16/2912307.html ，如需转载请自行联系原作者