Скачать или смотреть How to Export Class Methods in TypeScript

Learn how to easily export class methods in TypeScript, so you can reuse functionalities across different files without needing to instantiate the class.
---
This video is based on the question https://stackoverflow.com/q/75000420/ asked by the user 'best_of_man' ( https://stackoverflow.com/u/20706987/ ) and on the answer https://stackoverflow.com/a/75000625/ provided by the user 'ghybs' ( https://stackoverflow.com/u/5108796/ ) 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: How to export class methods in TypeScript?

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 Export Class Methods in TypeScript

If you're diving into TypeScript and working with classes, you might find yourself needing to export methods defined within a class for use in other files. The challenge arises when you want to access these static methods without having to create an instance of the class. This is a common scenario, and in this post, we’ll break down how to effectively export class methods and access them properly.

The Problem

You're working with a class in TypeScript, like the following example:

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

You find yourself unable to import and directly use methods like readAll or create without first creating an instance of the User class. This situation can be frustrating and may lead you to wonder if there's a more efficient way to handle class method exports in TypeScript.

Understanding Exporting Mechanisms

In TypeScript (and JavaScript), functions and classes can be exported so they can be imported in different modules. Let's explore the options you have.

Exporting Functions Directly

If your methods don’t rely heavily on class instantiation and can function independently, you can opt to export them directly as standalone functions. Here's how:

Define your methods outside the class:

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

Import and use them in another file:

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

Keeping Static Methods in a Class

If you prefer to maintain the organization provided by a class structure, you can export the class itself and access its static methods without instantiation:

Export the class with static methods:

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

Access the static methods like this:

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

This approach allows you to keep your methods organized within a class while still having the ability to call them directly on the class itself without creating an instance.

Conclusion

In conclusion, exporting and importing methods in TypeScript can be adaptive based on your application's needs. Whether you choose to define functions separately or keep them in a class, both methods work efficiently for managing your code. Remember:

Export standalone functions for simpler tasks that do not require class context.

Use static methods in classes when you want to maintain a structure and use class-based features.

With this knowledge, you should be well-equipped to handle exporting class methods or functions effectively in your TypeScript projects!