jQuer源码学习（一）：正则表达式

quickExpr = /^(?:[^#<]*(<[\w\W]+>)[^>]*$|#([\w\-]*)$)/, //匹配HTML标签        rnotwhite = /\S/,          trimLeft = /^\s+/, //去除左边的空格trimRight = /\s+$/, //去除右边的空格rsingleTag = /^<(\w+)\s*\/?>(?:<\/\1>)?$/,//单tag : 例：$("<img>")即创建img节点相当于documeng.createElement("img")/**  * 匹配json  */rvalidchars = /^[\],:{}\s]*$/, rvalidescape = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, rvalidtokens = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, rvalidbraces = /(?:^|:|,)(?:\s*\[)+/g, /**  * 浏览器检查  */rwebkit = /(webkit)[ \/]([\w.]+)/, //webkit内核ropera = /(opera)(?:.*version)?[ \/]([\w.]+)/, //opera内核rmsie = /(msie) ([\w.]+)/, //ie内核rmozilla = /(mozilla)(?:.*? rv:([\w.]+))?/, //mozilla内核