Скачать или смотреть How to Use Shared Modules in Angular

Discover how to effectively use `Shared Modules` in Angular to share components like sidebars across different modules. This guide provides clear instructions and solutions for common errors
---
This video is based on the question https://stackoverflow.com/q/70554664/ asked by the user 'core_user' ( https://stackoverflow.com/u/13457998/ ) and on the answer https://stackoverflow.com/a/70554742/ provided by the user 'mr. pc_coder' ( https://stackoverflow.com/u/2576254/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Angular use Shared Modules Component in another module

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Use Shared Modules in Angular: A Step-by-Step Guide

Introduction

Angular is a powerful framework widely used for building robust applications. One of its key features is modularity, allowing developers to organize their applications into cohesive blocks. However, integrating components across modules can sometimes lead to confusion and errors.

In this guide, we’ll tackle a common problem that developers face: using components from a shared module in another module. We'll specifically look at how to use a sidebar in a dashboard module and resolve the error often encountered during this process. By the end of this post, you'll have a clear understanding of how to structure your Angular modules for better component reuse.

Understanding the Structure

Initial Setup

To illustrate our issue, let’s consider the following directory structure:

shared/

shared.module.ts

components/

sidebar-menu.component.ts (which we’ll refer to)

right-bar.component.ts

modules/

dashboard/

dashboard.module.ts

pages/dashboard/dashboard.component.ts

In our shared.module.ts, we define several components that should be available for use in other parts of our application, including:

[[See Video to Reveal this Text or Code Snippet]]

The Problem

In our dashboard module (dashboard.module.ts), we want to use the RightBarComponent. Within our dashboard component’s HTML, we attempt to include the right bar component like this:

[[See Video to Reveal this Text or Code Snippet]]

However, upon doing so, we receive the following error:

[[See Video to Reveal this Text or Code Snippet]]

This error typically means that Angular cannot find the RightBarComponent in the current module's context.

Solution: Importing the Shared Module

Step-by-Step Resolution

The solution to our problem lies in properly importing the SharedModule into the DashboardModule. To fix this, modify your dashboard.module.ts as follows:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of Changes

Importing the SharedModule: Make sure to import your SharedModule at the top of the dashboard.module.ts file. This allows the dashboard module to access all components that have been exported from the shared module.

Including the SharedModule in Imports Array: In the imports array, include SharedModule. This step tells Angular to recognize the components defined in SharedModule, including RightBarComponent.

Conclusion

By following these steps, you should now be able to use your RightBarComponent in the DashboardComponent without any errors. Using shared modules effectively in Angular not only promotes code reuse but also helps keep your code organized and maintainable.

If you encounter issues in the future, remember to check your module imports to ensure the components you need are accessible in your current module's context.

Final Thoughts

Modular programming in Angular, especially with shared modules, can simplify your work significantly, and understanding how to correctly configure them is essential for building scalable applications. Happy coding!