Скачать или смотреть How to Effectively Display User Input and Perform Calculations in React with Formik and Chakra UI

Learn how to display user input value while performing calculations behind the scenes in React using Formik and Chakra.
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Display User Input and Perform Calculations in React

In modern web development, providing users with a seamless experience while interacting with forms is crucial. One common requirement is to show the value typed by the user while performing certain calculations in the background. If you're using React alongside libraries like Formik and Chakra UI, you might wonder how to tackle this efficiently. In this post, we will break down the process of displaying the input value while also performing a calculation.

The Problem

Let's say you have a simple input box in your React application. You need users to see their input accurately, but you also want to multiply that input by 100 for purposes such as processing the data for submissions or calculations. The challenge lies in figuring out how to achieve this without confusing the user.

Here's what the typical input component might look like:

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

The objective is to allow the user to type a number, display that number as-is, while storing a multiplied version of it in the form state. Now, let’s explore how we can implement this.

The Solution

Step 1: Set Up State Variables

First, we'll set up our state to hold both the actual value that the user inputs and the calculated value based on their input.

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

Step 2: Create a Change Handler

Next, we will create an event handler that processes changes to the input. This function will update both state variables whenever a user types something in the input field.

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

Step 3: Render the Input Component

Now we can render the Chakra UI Input component. We will tie the onChange event of our input to the handleChange function we just created, and display the value as the input’s value.

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

Step 4: Putting It All Together

Here's how the complete implementation might look:

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

Conclusion

By following the steps above, you can easily display the input value entered by the user while simultaneously performing calculations behind the scenes. This method not only enhances the user experience but also keeps your data processing clean and effective.

Incorporating Formik and Chakra UI into this flow will ensure that your application maintains a modern and efficient form handling structure, making development faster and your application more user-friendly.

Remember, clear communication with your users is the key. They should always see what they input, even if some of that data is being transformed for other purposes.

Now you're all set to apply these concepts in your own projects!