How to Dynamically Store Values from Two Inputs in React with useState

Learn how to store values from dynamically generated input fields in React efficiently, ensuring you save pairs of inputs together in a structured way.
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How to Dynamically Store Values from Two Inputs in React

When building interactive applications in React, it's common to need dynamic input fields where users can enter data on the fly. One common scenario is having pairs of inputs – such as a question and its answer – that are generated from a button click. In this post, we'll explore how to store the values of two dynamically generated inputs together effectively in the component's state.

The Challenge

You may find yourself trying to store the values from two input fields (for example, a question and an answer) as objects in an array. Initially, you might be successfully saving the inputs separately, but you need each pair to be stored together as an object within an array. So how can we achieve this in a clean and efficient way?

Example Scenario

Here’s the premise: upon clicking a button, you generate two new input fields where users can enter a question and its corresponding answer. Your goal is to have a state that looks like this:

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

Here’s how you can implement the solution step by step.

Solution Breakdown

1. Setting Up the State

First, we need to establish a state to keep track of our question-answer objects. This initializes with one empty pair to begin with:

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

2. Handling Input Changes

To update the state when the input values change, we will define a function to handle input changes. This function takes the event object and the index of the input being modified:

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

3. Adding New Input Fields

Next, we want to allow users to dynamically add new input fields. This is done with a button click:

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

4. Removing Input Fields

Users should also have the option to remove an input field if needed. We can create a function to handle the removal of an input pair:

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

5. Submitting the Data

Finally, when you're ready to submit the data (e.g., sending to a server), you can create a function that captures the current state of the inputs:

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

6. Rendering the Inputs

With all the logic in place, we can now render our inputs dynamically using map. Each input will have its own change handler without any conflicts:

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

Conclusion

By following the steps outlined above, you can efficiently manage multiple pairs of inputs in React, ensuring that both the question and its answer are stored as an object in an array. This method keeps your state organized and makes future data manipulation straightforward, whether you’re displaying, editing, or submitting the data.

Feel free to experiment with the code and customize it for your specific needs. Happy coding!