Manage React form state with Formik

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Welcome to our guide on how to manage React form state with Formik. Form elements hold their values in their own internal state – at odds with React's state-driven approach. To make the two work together, we need a more involved solution, such as using controlled components for each field.

But there are many more aspects to creating a form than just capturing data. We need to check the formatting is correct, all required fields have been set and that everything was sent successfully when submitted. That leads to a lot of complicated logic that can build up fast. This is where Formik can help.

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What is Formik?

Formik is a lightweight library that handles these problems. By wrapping a form with the supplied components, we get a lot of this behaviour for free. All we need to supply is the code to handle what makes our form unique.

To help us explore what Formik can do, we will be building a small voting application. The user can enter their name and vote on one of the supplied options. If everything is fine, the form will submit but, if not, the user receives an error message.

This content originally appeared in net magazine. Read more of our web design articles here. 

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