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How to Refresh Tokens in Axios

Learn how to effectively manage token refreshing in Axios to handle expired tokens seamlessly in your JavaScript applications. --- This video is based on the question https://stackoverflow.com/q/75082367/ asked by the user 'YusufOzt' ( https://stackoverflow.com/u/20863358/ ) and on the answer https://stackoverflow.com/a/75082579/ provided by the user 'cLx' ( https://stackoverflow.com/u/7175257/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How to refresh token in axios? Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l... The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- How to Refresh Tokens in Axios: A Complete Guide Token management is a critical aspect of modern web applications, particularly those utilizing APIs for data requests. A common challenge developers face is handling token expiration gracefully. In this guide, we will explore how to refresh tokens in Axios effectively, ensuring your users experience minimal disruption. Understanding the Problem When an application makes requests to a server that requires authentication, it usually uses a token to verify a user's identity. Over time, this token may expire, leading to a 401 Unauthorized error response. If not handled properly, this can result in a frustrating user experience. The goal is to: Detect when a token has expired. Automatically refresh the token and retry the failed request. Handle unexpected errors smoothly. Implementing the Solution To achieve effective token management, we can leverage Axios interceptors. These allow us to run our code or modify requests/responses before they are handled. Here's how you can set this up step-by-step. Step 1: Create a Custom Axios Instance First, we create a new Axios instance with a base URL and set up appropriate headers. [[See Video to Reveal this Text or Code Snippet]] Step 2: Add Request Interceptor Next, we'll add a request interceptor to inject the JWT into the Authorization header. [[See Video to Reveal this Text or Code Snippet]] Step 3: Add Response Interceptor This is where we will handle token expiration. When we receive a 401 status, we will attempt to refresh the token. [[See Video to Reveal this Text or Code Snippet]] Step 4: Implement Login and CRUD Operations Ensure your login functionality and other API methods handle token storage properly and conduct requests using our custom Axios instance. [[See Video to Reveal this Text or Code Snippet]] Once implemented, you can perform GET, POST, PUT, and DELETE operations while automatically managing token refreshes. Conclusion By integrating token refresh management into your Axios setup, you can significantly enhance the user experience in your applications. This approach reduces the need for users to log in repeatedly due to token expiration and allows for streamlined data requests. Implementing this method can seem complex, but with a structured approach using Axios interceptors, handling JWTs becomes manageable and efficient. For more advanced scenarios, consider adding error logging and user logout functionality to solidify your authentication process. Happy coding!