(function (window) { 'use strict'; // class helper functions from bonzo https://github.com/ded/bonzo function classReg(className) { return new RegExp("(^|\s+)" + className + "(\s+|$)"); } // classList support for class management // altho to be fair, the api sucks because it won't accept multiple classes at once var hasClass, addClass, removeClass; if ('classList' in document.documentElement) { hasClass = function (elem, c) { return elem.classList.contains(c); }; addClass = function (elem, c) { elem.classList.add(c); }; removeClass = function (elem, c) { elem.classList.remove(c); }; } else { hasClass = function (elem, c) { return classReg(c).test(elem.className); }; addClass = function (elem, c) { if (!hasClass(elem, c)) { elem.className = elem.className + ' ' + c; } }; removeClass = function (elem, c) { elem.className = elem.className.replace(classReg(c), ' '); }; } function toggleClass(elem, c) { var fn = hasClass(elem, c) ? removeClass : addClass; fn(elem, c); } var classie = { // full names hasClass : hasClass, addClass : addClass, removeClass : removeClass, toggleClass : toggleClass, // short names has : hasClass, add : addClass, remove : removeClass, toggle : toggleClass }; // transport if (typeof define === 'function' && define.amd) { // AMD define(classie); } else { // browser global window.classie = classie; } })(window);
经测试,兼容IE8以下;