What sets apart exporting a component from importing its module in another module?

When working with Angular, consider having both module A and module B. If I intend to utilize "A-component" within components of module B, what is the distinction between importing module A in Module B compared to including the "A-component" in the exports of module A?

I experimented with both methods, and it appears they do not yield the same result. This situation can be quite perplexing.

Answer №1

In order to achieve proper functionality, it is crucial to export and import multiple components, not just one at a time.

If default exports are not in use, the code should be structured as follows:

Component A (a.mjs)

export class myClass {
  ...
}

Component B (b.mjs)

import { myClass as myClassFromA } from './a.mjs'

Alternatively, if default exports are employed:

Component A (a.mjs)

export default class myClass {
  ...
}

Component B (b.mjs)

import myClassFromA from './a.mjs'

Answer №2

  1. including Module A within Module B This indicates your intention to utilize components, pipes, directives, and services from module A inside Module B
  2. making the "A-component" available in module exports By doing this, you are granting accessibility to this component for users of module A

Answer №3

Angular relies on the concept of Dependency Injection. So, when you want to utilize A-component from B-module in Angular, it is essential to make sure that A-component is exported from A-module and also imported into B-module.

But what happens if you try to use A-component directly without exporting it?

In such a scenario, you would have to manually provide all dependencies of A-component in B-module, which is not considered as good coding practice. Therefore, it is recommended to always export components from their respective modules for better code organization.

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