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Learn how to efficiently handle pagination in Axios GET requests. Discover the best practices for looping through multiple asynchronous API calls using JavaScript.
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Efficiently Looping Through Nested Axios GET Requests With Pagination

When working with REST APIs, one common challenge developers face is pagination. Pagination allows APIs to provide large sets of data divided into multiple pages. This becomes crucial to efficiently retrieve and manage data without overloading the server or the application's memory. In this guide, we will explore how to make a series of Axios GET requests to paginate through all the data and retrieve the required items seamlessly.

The Problem

Let's say you're coding a feature that queries an API for trip data. As part of your API request, you receive a limited number of results per page, as well as a total count of available trips. For example, if you get a total of 100 trips with a maximum of 10 trips per page, you need to make multiple requests to retrieve all 10 pages. The original code snippet attempts to achieve this, but it has some flaws.

Here's a look at the snippet that illustrates this issue:

[[See Video to Reveal this Text or Code Snippet]]

In this code:

The intention is to loop through multiple pages using a for loop.

However, the response variable inside the loop keeps referencing the initial query, causing problems since the results may not be updated for each successive call.

The Solution

To overcome this challenge, we will utilize async/await syntax alongside the Promise.all method, which allows multiple asynchronous requests to be made simultaneously. This approach is cleaner and avoids the pitfalls of the initial code. Here's how you can do it:

Step 1: Set Up Axios Instance

Start by creating your Axios instance to configure the base URL and headers:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Create an Async Function for GET Requests

Next, define an asynchronous function that handles fetching all trips:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Execute the Function

Finally, invoke your function to execute the requests:

[[See Video to Reveal this Text or Code Snippet]]

Key Points to Note

Async/Await: This syntax simplifies working with promises in JavaScript, making your code easier to read and maintain.

Promise.all: This method allows you to send multiple requests simultaneously and wait for all of them to finish, which can improve performance.

Error Handling: Always ensure to handle errors gracefully. In the example provided, we catch errors with a simple log statement, but in production, consider implementing more robust error handling.

Conclusion

Handling pagination when making multiple Axios GET requests can initially appear daunting, but with the right approaches like using async/await and Promise.all, it becomes significantly easier. By following the structured method provided in this guide, you can efficiently retrieve all the necessary data from paginated APIs. Happy coding!