使用typescript导出变量时出现问题

Question

我有以下打字稿文件：

let constants = {
    urls: {
      delegates: {
        AUTHENTICATION: {
          LOGIN: "auth/pub/login",                                                        // User Login (POST)
          LOGOUT: "auth/pub/logout",                                                       // User Logout
          PASSWORD_CHANGE: "security/pub/changepassword",                                           // Change user password (POST)
          PASSWORD_RESET: "security/pub/resetpassword",                                             // Reset user password (POST)
          PASSWORD_FORGOT: "security/pub/forgotpassword/{email}"                                    // Forgot password
        },
 ...

export constants.urls;//Does not compile...

我收到以下错误消息：

Expected function, variable, class, interface or namespace declaration.
Expression statement is not an assignment or call.

修改：我试过了：

const urls = constants.urls;
export urls;

并导致相同的错误消息...

编辑2 ：感谢下面的回复和Matt的评论，我提出了这个工作正常：

const URLS = constants.urls;
export {URLS};

Answer 1

Use

let constants = {
    urls: {
      delegates: {
        AUTHENTICATION: {
          LOGIN: "auth/pub/login",                                                        // User Login (POST)
          LOGOUT: "auth/pub/logout",                                                       // User Logout
          PASSWORD_CHANGE: "security/pub/changepassword",                                           // Change user password (POST)
          PASSWORD_RESET: "security/pub/resetpassword",                                             // Reset user password (POST)
          PASSWORD_FORGOT: "security/pub/forgotpassword/{email}"                                    // Forgot password
        },
 ...

const urls = constants.urls
export {urls};