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Learn how to send multiple axios requests one after the other using `async/await`. This guide guides you through the process with clear code examples.
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How to Send Multiple axios Requests Sequentially with async/await

When working with multiple API requests in JavaScript, developers often find themselves at a crossroads. Should they send requests in parallel for efficiency or sequentially to maintain the integrity of data? For instance, when you need to ensure that the timestamp of each POST request is in the correct order, sending requests one after the other becomes critical. In this guide, we will address the question of how to send multiple axios requests in a for loop and ensure they are executed in series, one after the other.

The Problem: Sending Sequential Axios Requests

In a common scenario, you might use Promise.all() to send multiple axios requests concurrently. While this method is efficient, it doesn't always ensure that the requests are sent in the required order. For example, consider a situation where each request's timestamp needs to be strictly in sequence, from the first to the last request. Here is an example of how one might initially attempt this using Promise.all():

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

This code sends all requests at once, but if you need to ensure that the first request finishes before the second starts, you’ll need a different approach. Let’s explore a better strategy using async/await.

The Solution: Using async/await for Sequential Requests

To achieve the desired behavior of sending requests one after the other, we can leverage the power of async/await. By creating an async function and using a for loop, we can await the completion of each request before moving on to the next. This ensures that each request is sent in the intended order. Here’s how you can do it:

Step-by-step Implementation

Define an async function: This function will handle the axios requests.

Initialize an array for responses: This will store the results of each axios POST request.

Use a for loop: Iterate through each item in your data array.

Await each axios request: By awaiting the axios call, we make sure that the next request does not start until the current one is complete.

Store responses: Push each response into the responses array for further processing.

Here’s the implementation:

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

Key Components

Async Function: The use of async allows us to use await within the function. This is crucial for handling asynchronous operations sequentially.

For Loop: Traditional loops work well for iterating over arrays, and when combined with await, they ensure one request is completed before starting the next.

Response Storage: By collecting the responses, you can later manipulate or display the data as needed.

Conclusion:

This method of sending axios requests sequentially ensures that your application maintains the necessary order of operations, especially when the timing of data is critical. By embracing async/await, developers can write cleaner and more maintainable code that respects the flow of logic required.

Give this approach a try in your JavaScript or React applications where ordered requests are necessary. You'll find that the clarity and simplicity of async/await greatly enhance your code quality while fulfilling your functional requirements.