fmd.js
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another module writing system
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<h1 id="-exports">内建模块exports</h1>
<p><code>exports</code>是个对象，用来承载模块对外输出的接口</p>
<pre class="sh_javascript">define( 'case/f', ['exports'], function( exports ){
exports.foo = function(){
//todo sth
};
} );</pre>
<p>当其他模块引用模块<code>case/f</code>时，将得到含有<code>foo</code>方法的对象</p>
<pre class="sh_javascript wrong">
define( 'case/g', ['exports'], function( exports ){
exports = function(){};
} );
</pre>
<p><strong>内建模块exports是不能被覆盖的，不允许这么做</strong></p>
<h2 id="-return-">用return返回接口</h2>
<p>除了使用内建模块exports来对外输出接口外，也可以使用<code>return</code></p>
<pre class="sh_javascript">define( 'case/h', function(){
var foo = function(){};
return foo;
} );</pre>
<p>这样模块也能返回非对象的接口类型，当然也可以返回对象</p>
<p><strong>一般情况下，不允许内建模块exports和return同时使用</strong></p>
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