How to Pass Query Parameters with Axios for POST Requests in React Native?

Posting Query Parameters with Axios

When interacting with APIs, you may need to pass query parameters to filter or modify the request. Let's explore how to achieve this using the Axios library.

In your React Native application, you are encountering a 400 error when attempting to pass query parameters to an API endpoint. The error message indicates that the query parameters are invalid.

The issue lies in the signature of Axios's post method. Unlike in PostMan or Insomnia, you need to provide an additional third argument to specify the query parameters. This argument is an object with key-value pairs representing the query parameters.

To resolve this error, you can modify your code as follows:

.post(`/mails/users/sendVerificationMail`, null, { params: {
  mail,
  firstname
}})
.then(response => response.status)
.catch(err => console.warn(err));

By passing null as the second argument and providing the query parameters in the third argument, you are instructing Axios to send an empty body and include the specified query parameters in the request URL.

This will result in a POST request with the following format:

POST
http://localhost:8000/api/mails/users/sendVerificationMail?mail=[email protected]&firstname=myFirstName

Hope this helps you resolve your issue and effectively pass query parameters with Axios in your React Native application.

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