How to Set Environment Variables Within a TypeScript File on Node.js

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In this guide, we'll address this common problem and provide a clear path for setting environment variables in your TypeScript files effectively. Let's dive in!

Understanding the Problem

You may have the following setup in your TypeScript application:

An .env file where you define your environment variable, for example:

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A TypeScript file attempting to read this variable:

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An error that says TS2591: Cannot find name 'process' when you try to compile your TypeScript project.

This error indicates that TypeScript cannot recognize the process object being used, which is crucial for accessing environment variables. Fortunately, there are specific steps you can take to mitigate this issue.

Step-by-Step Solution

1. Install the Necessary Packages

If you haven't done so already, ensure you have the following packages installed:

dotenv: This package loads environment variables from a .env file.

You can install these packages using npm with the following command:

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2. Configure TypeScript

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3. Load Your Environment Variables

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4. Access Environment Variables in TypeScript Files

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Conclusion

If you continue to face issues, consider revisiting the package installations and TypeScript configurations or checking your file paths for any discrepancies.

Happy coding!