Скачать или смотреть How to Export Async Await Functions in Node.js for Easy Utility Access

Learn how to effectively export async await functions from a utils file in Node.js, allowing easy access throughout your project using Protractor.
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Introduction

In modern web development, utilizing asynchronous functions is a common practice, especially when dealing with tasks that require waiting for external processes, such as API calls or user input. However, when it comes to organizing your code, you might find yourself in need of exporting these asynchronous functions from a utility file, to keep your codebase clean and maintainable.

In this guide, we will explore how to export async await functions from a utility file in Node.js, so you can effortlessly access them throughout your project, particularly in a Protractor configuration file. This will help you streamline your test automation efforts.

Problem Definition

You have a utilities file where you have defined several async functions, and you want to export these functions in a way that allows you to call them easily within your Protractor tests using a simple syntax. For example, you would like to invoke a function like browser.params.utils.pressing(protractor.Key.DOWN); without hassle.

Solution Breakdown

To achieve this, there are two primary approaches you can take:

Creating a Module and Requiring It

Making It Global

We’ll cover both methods step-by-step.

1. Creating a Module and Requiring It

Using the module system in Node.js allows you to encapsulate your async functions into a single file, which can then be imported as needed. Here's how to do it:

Step 1: Define Your Utility Functions

Create a utils.js file and define your functions within it:

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Step 2: Import and Use in Your Project

Once you have your utility functions encapsulated in utils.js, you can require it in your Protractor configuration or other parts of your project:

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2. Making It Global

Another approach is to make these utility functions accessible globally within your Protractor configuration. This method allows you to skip the require statement altogether.

Step 1: Configure Global Utilities

In your Protractor configuration file, you can add the following code inside the onPrepare function:

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Step 2: Use Anywhere in Your Project

With the utilities defined globally, you can now call them directly without requiring them:

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Conclusion

By following these approaches, you can effectively organize your async functions in a way that enhances your codebase's maintainability and readability. Whether you choose to create a module or make it global, you now have the tools to streamline your testing processes in Protractor.

Next time you are working with async functions in Node.js, remember these strategies to make your utilities easily accessible!