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How to Update Only One Object Key in React.js Using a PUT Request

Learn how to update a single property of an object in React.js while preserving the rest of the data with a simple API PUT request. --- This video is based on the question https://stackoverflow.com/q/69591915/ asked by the user 'AS10' ( https://stackoverflow.com/u/15062161/ ) and on the answer https://stackoverflow.com/a/69592046/ provided by the user 'Deniz Karadağ' ( https://stackoverflow.com/u/14999457/ ) 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: Update only one Object Key Reactjs 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. --- Effectively Updating Just One Object Key in React.js Managing state in React.js, especially when interacting with an API, can sometimes become a challenge. One common issue developers face is updating only a single property of an object in the state. In this guide, we’ll cover how to update just one object key without losing the rest of the data. We’ll dive into the problem a user encountered and present you with a couple of effective solutions. The Problem Consider a scenario where you have a list of books stored in an API, and you want to update specific properties of a book. By default, if you send a PUT request consisting of just one property, the other properties may turn up as undefined. This not only disrupts the integrity of your data but also leads to unexpected behavior in your application. To illustrate, here's a simple component setup that you might work with: [[See Video to Reveal this Text or Code Snippet]] In this scenario, if you only set one of the properties (e.g., the title), the other properties (bookStart and bookEnd) are left as undefined when the PUT request is made. The Solution To resolve this problem, you can either send the complete existing data along with the updated data or develop a strategy for your server-side handling to update only the relevant fields. Let's break down these approaches. Option 1: Retrieve Existing Book Data One way to ensure you're maintaining data integrity is by retrieving the full details of the existing book before sending a PUT request. Here’s how to implement this approach: Fetch the current book data from your backend when you first load the component or before making the request. Merge the updated fields with the existing fields into a single object. Send this object in your PUT request, ensuring you provide complete data. Example snippet: [[See Video to Reveal this Text or Code Snippet]] Option 2: Use the Spread Operator The alternative approach involves sending only the updated fields along with a fallback to the existing book data. This requires your backend to handle such partial updates responsibly. When you make a request to update the book, use the spread operator to combine existing data with newly updated fields. On the server side, check if certain fields are present; if not, utilize the existing values. Example snippet: [[See Video to Reveal this Text or Code Snippet]] Conclusion In summary, updating only one property of an object in React can seem daunting, but by utilizing either of the above approaches, you can maintain data integrity without losing other properties. You can choose to send the full object with only the desired changes or leverage the spread operator to create a comprehensive update request. By implementing these strategies, you can streamline your API interactions and enhance the stability of your application. If there are any clarifications or additional tips you would like to discuss, feel free to leave a comment!