Inter-component communication in Angular

I am working with two components: CategoryComponent and CategoryProductComponent, as well as a service called CartegoryService. The CategoryComponent displays a table of categories fetched from the CategoryService. Each row in the table has a button that redirects to the CategoryProductComponent, which shows the list of products in that category.

When retrieving JSON data from the API, there is a links array containing rel = category-product with the related product link.

The issue arises when I manually input the URL in the browser, as the link is not fetched by the CategoryComponent. I have tried assigning the link to a variable in the CategoryService, assuming it would persist after the initial assignment due to services being singletons. However, this approach did not solve the problem. What is the best way to handle communication between these components?

In addition, passing the link as an extra object in router.navigate seems less than ideal, especially for direct URL entry in the browser.

This is the structure of my code:

// Sample code goes here

Any suggestions or insights are appreciated. Thank you!

angulartypescriptrxjs

Answer №1

Upon revisiting your question, I noticed something I missed initially.

It appears that manually inputting the URL into the browser does not function as intended.

Utilizing the Angular router ensures that your application maintains its state, as you are not technically navigating anywhere when utilizing it. Conversely, manually typing in the link into your browser results in deep linking into your app - and it is likely that any previous state is lost, essentially causing a restart of the application.

A side note: I find it somewhat surprising that this issue has surfaced for you. Is it possible that this behavior was expected?

If you wish to address this requirement, consider storing the data in CategoryService using localstorage like so:

  setCategoryProductLink(link: string) {
    localStorage.setItem('categoryProductLink', link);
  }

  getCategoryProductLink(): string {
    return localStorage.getItem('categoryProductLink');
  }

By following this approach, the data will persist between sessions.

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