打字稿：将本地变量名称分配给导入的嵌套名称空间

Question

I'm declaring a JAVA library in a separate file to build out the various classes and namespaces used within it so when I reference this from other files that utilize the JAVA library there will be associated comments and typings. (This is for a NativeScript plugin btw which is why I'm mixing JAVA and JS).

javalib.ts

export declare namespace org {
  export namespace fizz {
    export namespace buzz {
      export namespace libA {
        export class libAClassA { }
        export class libAClassB { }
      }

      export namespace libB {
        export class libBClassA { }
        export class libBClassB { }
      }
    }
  }
}

It looks wild, and I could probably shorten it to just export declare namespace org.fizz.buzz { ... } but I'm outling it for now.

In another file that will be utilizing some of these classes (ie, libAClassA or libBClassB) I'd like to of course import these namespaces to have the typings and references follow. I've so far been able to get it working like so:

app.ts

import * as pkg from './javalib';

let aliceClass = new pkg.org.fizz.buzz.libA.libAClassA();
let bobClass = new pkg.org.fizz.buzz.libA.libBClassB();

While this works, it's not ideal as having to write out the entirety of the namespace to reference this definition can become quite bothersome all for the added benefit of code visability while developing. I could instead just do a blanket declare var org: any and be done with it, but in an effort to better my future dev on this project as well as others I'd like to utilize this and set this up.

Is there any way to cast this namespace reference to a local var, similar to how in JAVA you can just do import org.fizz.buzz; and suddenly have references and access to everything within that namespace?

ideal-app.ts

let libA = org.fizz.buzz.libA;
let libB = org.fizz.buzz.libB; 

let aliceClass = new libA.libAClassA();
let bobClass = new libB.libBClassB();

Answer 1

It's possible to do as you have in the ideal-app.ts but to make sure it's compatible with Webpack and Snapshot builds, initialise them inside a function call. Something like this,

let libA, libB;

function initializePackages() {
   if (!libA) {
     libA = org.fizz.buzz.libA;
     libB = org.fizz.buzz.libB; 
   }
} 

// Call it before accessing the variables
initializePackages();
let aliceClass = new libA.libAClassA();
let bobClass = new libB.libBClassB();