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兼容CommonJS, AMD, CMD的模块定义写法
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| //闭包执行一个立即定义的匿名函数 | |
| !function(factory) { | |
| //factory是一个函数，下面的koExports就是他的参数 | |
| // Support three module loading scenarios | |
| if (typeof require === 'function' && typeof exports === 'object' && typeof module === 'object') { | |
| // [1] CommonJS/Node.js | |
| // [1] 支持在module.exports.abc,或者直接exports.abc | |
| var target = module['exports'] || exports; // module.exports is for Node.js | |
| factory(target); | |
| } else if (typeof define === 'function' && define['amd']) { | |
| // [2] AMD anonymous module | |
| // [2] AMD 规范 | |
| //define(['exports'],function(exports){ | |
| // exports.abc = function(){} | |
| //}); | |
| define(['exports'], factory); | |
| } else { | |
| // [3] No module loader (plain <script> tag) - put directly in global namespace | |
| factory(window['ko'] = {}); | |
| } | |
| }(function(koExports){ | |
| //ko的全局定义 koExports是undefined 对应着上面的[3] 这种情况 | |
| var ko = typeof koExports !== 'undefined' ? koExports : {}; | |
| //定义一个ko的方法 | |
| ko.abc = function(s){ | |
| alert(s); | |
| } | |
| }); | |
| //[3]中情况的调用 | |
| ko.abc("msg"); |
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