javascript - 导出 NodeJS 模块的问题

Question

我有这个目录结构:

• 应用程序/router.js
• app/oauth2-home-client/oauth2-client.js

来源:

app/oauth2-home-client/oauth2-client.js

    //SOME CODE

    exports.Bearer = {

            authenticate : passport.authenticate('bearer', { session : false }),

            initialize : passport.initialize()

            // session : passport.session()
    };

app/router.js

var oauth2 = require('./oauth2-home-client/oauth2-client');

console.log(JSON.stringify(oauth2.Bearer));

//SOME CODE

当我打印 oauth2.Bearer(以及 oauth2)内容时，我得到 {}。我做错了什么？

谢谢。

Answer 1

您的代码:

exports.Bearer = {
  authenticate : passport.authenticate('bearer', { session : false }),
  initialize : passport.initialize()
  // session : passport.session()
};

将导致:

exports.Bearer = {
  authenticate :undefined,
  initialize : undefined
};

因为 passport.authenticate 和 passport.initialize 都返回 undefined。

并且具有值未定义的键被JSON.stringify省略。 .

[...]If undefined, a function, or a symbol is encountered during conversion it is either omitted (when it is found in an object) or censored to null (when it is found in an array).[...]