使用requireJs的模块中的循环依赖关系 [英] Circular Dependencies in modules using requireJs

问题描述

为了修复循环依赖关系，请阅读requireJs文档，
，建议使用 exports 为模块创建一个空对象可立即供其他模块参考。

Reading the requireJs documentation,
in order to fix the Circular Dependencies, is suggested to use exports to create an empty object for the module that is available immediately for reference by other modules.

我尝试使用此代码，但似乎无效。怎么了？

I try this code but it seems to do not work. What is wrong?

PS：

读取看到输出的注释，

尤其是setTimeout调用中的B模块。

P.S.:
read the comments for seeing the output,
especially the B module inside setTimeout call.

// A module
define([
    'b'
], function (b) {
    console.log('B:', b); // B, Object
    var A = {
        boo: 1
    };

    return A;
});

---

---

// B module
define([
    'a',
    'exports'
], function (a, exports) {
    console.log('A:', a); // A, undefined (as I was expecting)
    exports.A = function () {
        return a;
    }

    var B = {
        bar: 1
    };

    setTimeout(function () {
        console.log('exports.A', exports.A()); // exports.A undefined 
                                           // I would like to access the A object
                                           // which is defined in A module
    }, 500);

    return B;
});

---

---

// main.js

(function () {

    define([
        'a'
    ], function () {
    });
}());

推荐答案

你应该可以使用<的同步版本您的B模块中code> require（）访问A模块：

You should be able to use the synchronous version of require() in your B module to access the "A" module:

// B module
define([
    'a',
    'exports'
], function (a, exports) {
    console.log('A:', a); // A, undefined (as I was expecting)
    exports.A = function () {
        return require('a');
    }
    ...
});

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