Formik is a form library that’s very flexible, but also has a concise interface that’s quick to learn. In this final part of our series on building React forms, we’ll rebuild the form from parts 1 and 2 with Formik. We’ll discuss some benefits a drawbacks of using Formik, and highlight the alternatives.
To recap: in Part 2 we created a controlled component form and implemented our own validation with useState and useEffects.
In Part 1 we talked about building a simple contact form using an uncontrolled component. In an uncontrolled component, validation is left up to the browser. As we discussed, this can lead to an inconsistent experience across browsers.
In this tutorial we’ll modify our basic form by taking control of the form’s state. In doing this we’ll create what React calls a “controlled component.” With a controlled component we’ll have more control over the form, allowing us to create a consistent validation experience, and customize it however we like.
There’s no “right way” to build forms in React and there are a lot of options. It’s simple enough to have a working form, but what about validation? Can you rely on the browser’s default validation, or should you write your own state handlers, or drop in a form library?