How to Cache API Responses in Next.js using Exported Variables

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The Problem: Caching API Responses

The Solution: Using Exported Variables

Step 1: Create an Exported Variable

You can define an exported variable in your module where you intend to cache the data. This variable can be initially set to null. Using the export keyword enables other modules to import and share this data.

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Step 2: Fetch and Cache the Data

You will need to fetch the data from your API. After fetching, simply assign the response to theData. Here is a sample code snippet showcasing this process:

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This approach allows all modules that import this data to have a live binding to theData. They can access the updated value once the data has been fetched.

Step 3: Handling Potential Null Values

If you're concerned about modules accessing theData while it's still null, you can take it a step further by exporting a promise instead. This means modules can await the data fetch before proceeding.

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Modules that import theData can now await for the data to be ready, ensuring they work with the content only when it's available.

Example Usage

To use the cached data across different components or modules, you can import it as follows:

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Conclusion