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Tauri Get Env Var

4 min read Oct 06, 2024
Tauri Get Env Var

How to Access Environment Variables in Tauri Applications

Tauris applications are known for their ability to create native desktop applications with web technologies. While building such applications, you might need to access environment variables for configuration, secrets, or other dynamic values. This article will explore how to access these variables effectively within a Tauri application.

Why Use Environment Variables?

Environment variables are an excellent way to manage configuration values that might vary based on the environment where your application runs. For example:

  • Development: You might use different API endpoints for local development.
  • Production: You might have production-specific database credentials.
  • Testing: You might need distinct settings for automated tests.

Accessing Environment Variables in Tauri

Tauris applications leverage the deno runtime, and accessing environment variables is done through the Deno API. Here's a step-by-step guide:

  1. Define Environment Variables: You can define environment variables either in your system environment or within your Tauri configuration file (tauri.conf.json or tauri.config.js).

    System Environment:

    export MY_API_KEY=your_secret_key

    Tauri Configuration File:

    {
  "build": {
    "env": {
      "MY_API_KEY": "your_secret_key"
    }
  }
}

  2. Access from Your JavaScript Code: In your application's JavaScript code, use Deno.env.get("your_variable_name") to retrieve the environment variable's value.

    const apiKey = Deno.env.get("MY_API_KEY");
console.log(apiKey);

Important Considerations:

  • Security: Do not store sensitive information directly within your source code. Use environment variables for security and flexibility.
  • Environment-Specific Configuration: Tailor your environment variables based on the specific environment (development, production, testing) to manage application behavior effectively.

Example: Handling API Endpoints

Let's say you want to configure your application to use different API endpoints based on the environment.

1. Environment Variables:

{
  "build": {
    "env": {
      "API_BASE_URL": "https://api.example.com" // Production 
    }
  }
}

2. JavaScript Code:

const apiBaseUrl = Deno.env.get("API_BASE_URL"); 
fetch(apiBaseUrl + "/users") 
  .then(response => response.json())
  .then(data => console.log(data));

This code fetches user data from the API endpoint defined in the API_BASE_URL environment variable. You can easily modify the environment variable for development or testing environments.

Conclusion:

Accessing environment variables in Tauri applications is a straightforward process using Deno.env.get. This approach offers a robust way to manage configuration and secrets securely and flexibly. By leveraging environment variables effectively, you can create Tauri applications that adapt to different environments and deployment scenarios.

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