How to Dynamically Add Values to Your config.json File in Angular

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The Problem at Hand

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You can access this value using a service in your Angular application:

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Now, consider that you want to add an error message to your configuration file, where part of the message is dynamic. A typical example might look like this:

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In this case, the ${code} needs to be replaced with some dynamic value based on the specific situation. This raises two questions:

How do you then read this dynamic message in your TypeScript file after adding it to the config file?

Let’s break down the solution.

Step-by-Step Solution

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2. Accessing the Configuration in Angular

Next, modify your Angular service to retrieve this configuration. We'll use the existing ConfigService class you have, which is set up for loading configurations.

3. Replace the Dynamic Value

In your TypeScript file, replace the dynamic section of the errorMessage with the appropriate value. Here’s how you can do this:

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Where 'the dynamic value' would be replaced with the actual error code you are working with at runtime.

4. Putting It All Together

Here’s how the complete code can look using the service to fetch the value from the configuration and replace the placeholder:

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Summary of Steps

Fetch Configuration: Use your ConfigService to access the updated configuration.

Replace Placeholder: Modify the error message to include the actual dynamic value before displaying it.

Conclusion

Don't hesitate to play around with this approach and tailor it to your project requirements. Happy coding!