01.每天一点JQUERY源码——定义函数

(function(window,undefined){ var rootjQuery, readyList, core_strundefined =typeof undefined， location =window.location, document =window.document, docElem =window.documentElement, _jQuery =window.jQuery, _$ = window.$, class2type = {}, //无用了
    core_deletedIds = [], core_version = "2.0.3", //Save a reference to some core metheds
    core_concat =core_deletedIds.concat, core_push=core_deletedIds.push, core_slice =core_deletedIds.slice, core_indexOf =core_deletedIds.indexOf, core_toString = class2type.hasOwnProperty, core_trim =core_version.trim, //定义jQ函数
    jQuery = function(selector,context){ return new jQuery.fn.init(selector,context,rootjQuery); }， //正则 暂缺
 })(window) /*————————————解析————————————————————————————*/
/*传window*/
1/速度更快
2/传参e取代window(压缩版)
/*传undefined*/
1/防止undefined被修改


/*严格模式下需要规范，否则会报错*/
"use strict"

/*不充分判断(IE9以下)*/ window.a == undefined /*全兼容判断*/
typeof window.a == undefined /*jQuery的对象设计方式*/ jQuery.fn=jQuery.prototype; function jQuery(){ return new jQuery.prototype.init(); } jQuery.prototype.init =function(){} jQuery.prototype.css =function(){} jQuery.prototype.init.prototype = jQuery.prototype; jQuery().css(); /*———————————————————————————————————————————————*/