I'm currently working on creating a hybrid application using Angular 1 and Angular 2 with webpack. However, I've run into an issue with a nested module.
//a.ts
module a.b.c {
export class A {
}
}
//b.ts
module a.b.c {
export class B extends A {
}
}
While the code compiles successfully, I encounter an error stating that A is undefined. I have tried different ways of importing modules but nothing seems to resolve the issue. Any ideas on what could be causing this problem?
To successfully link a.ts with b.ts, ensure that you incorporate a reference to a.ts within b.ts.
Update your b.ts file as shown below:
/// <reference path="./a.ts" />
module x.y.z {
export class Y extends X {
public third;
}
}
Moreover, make sure to include a.ts before b.ts in your html document:
<script src="./a.js"></script>
<script src="./b.js"></script>
Failure to adhere to this order will result in an error message.
In the past, we used references for our code structure. However, after integrating webpack, it seems that using references is no longer recommended as webpack does not compile it properly.
If I simply remove the module, everything works fine. But as you mentioned, this codebase contains numerous internal modules. If there isn't a better solution, and the best practice is to eliminate the module, then perhaps that is the route we should take.
In order to address the challenge with webpack, it's important to note that there isn't a perfect solution available. Unless the project is massive, transitioning to external modules is often the most effective approach.
If your files predominantly follow this structure:
//a.ts
module a.b.c {
export class A {}
}
//b.ts
module d.e.f {
export class B extends a.b.c.A
}
It becomes relatively simpler as you can simply modify them as follows:
//a.ts
export module a.b.c {
export class A {}
}
//b.ts
import {a} from './a';
module d.e.f {
export class B extends a.b.c.A
}
However, if your scenario involves two files within the same namespace\internal module like a.b.c, handling this becomes more complex and might require some less elegant solutions like:
//b.ts
import {aImported} from './a';
module a.b.c {
export class B extends aImported.b.c.A
}
In this particular resolution, the files act as external modules exporting internal ones.
Another alternative to consider is taking all existing code, compiling and concatenating it using traditional methods like Gulp or Grunt before integrating the resulting javascript file into webpack. While I have utilized this method previously, I've found it cumbersome and subsequently moved on from it. Despite its minimal impact on code modification, overall, I believe it presents more challenges compared to other solutions...
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