requirejs 可直接调用依赖项的依赖方法吗

如果你熟悉 CommonJS 模块的写法，你也可以使用 exports 创建一个空对象来导出模块，这样定义的模块可以被其他模块立即使用。即使在循环依赖中，也可以安全的直接使用。 不过这只适用于导出的模块是对象，而不是一个函数:

1 //Inside b.js:
2 define(function(require, exports, module) {
3 //If "a" has used exports, then we have a real
4 //object reference here. However, we cannot use
5 //any of a's properties until after b returns a value.
6 var a = require("a");
7
8 exports.foo = function () {
9 return a.bar();
10 };
11 });

用依赖数组的话，记得将 'exports'当作依赖模块：

1 //Inside b.js:
2 define(['a', 'exports'], function(a, exports) {
3 //If "a" has used exports, then we have a real
4 //object reference here. However, we cannot use
5 //any of a's properties until after b returns a value.
6
7 exports.foo = function () {
8 return a.bar();
9 };
10 });