The decision to do this outside the component is not a technical one, but rather for readability of our code. initialValues and validate are code snippets, not normal words. The following sandbox holds the code for our form:įorm validation without the use of a library const Form = () => from "formik" īefore creating the component, we need to create an initialValues and validate object which we’ll pass as props to the Formik component when we set it up. We’ll start by creating our form component with initial state values. On its own, React is powerful enough for us to be able to set up custom validation for our forms. Note: This article requires a basic understanding of React. We will implement these form validation methods to validate a simple sign up form I have set up. Simple Example Uses the built-in React inputs: input, select, and textarea to build a form with no validation. Then we will set up form validation using Yup and Formik’s custom components and understand how Yup works well with Formik in handling Form validation. We’ll learn how it can be used incrementally with HTML input fields and custom validation rules. Next, we will see how the Formik library works. In this article, we will learn how to handle form validation and track the state of forms without the aid of a form library. In this article, we’ll learn how Formik handles the state of the form data, validates the data, and handles form submission.Īs developers, it is our job to ensure that when users interact with the forms we set up, the data they send across is in the form we expect. However, it doesn’t have to be a pain-staking process. Validating the data the user passes through the form is a critical aspect of our jobs as web developers. Forms are an integral part of how users interact with our websites and web applications.
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