All the fields have their value stored in event.target.value excluding checkboxes. To take control of change handling, add a handler to the onChange event to each field: Then create the handlers as class methods which will take the values from each field and update the state using setState. We have states, but something needs to trigger updates to these states. By "React-ful" I mean logic, that uses React's internals like component state and the component lifecycle. With custom hooks, we can repurpose common React patterns and make them reusable through a neat hook API. No spam! Component { state = { checked: true Let’s dive into the implementations: React.Component To make the state of the . As long as the name of the fields matches their state properties, then the function above will be able to handle change for all fields including the checkbox. once we achieve the desired animation, we’ll refactor a reusable animation component The beauty of reusing form logic shines with React Hooks. Sharing reusable logic via component abstractions in a clean way is possible when relying on Hooks as well as it is when using React.Component. Here are clear reasons why render props are preferred: I have been using Formik, and it seemed like the best solution, until now. Working with forms in React can require a bit of boilerplate, and while there are libraries like Formik, Redux Form or React Redux Form can help make things easier, they can be overkill for many situations. This post requires basic knowledge of React Hooks and of terms like Higher Order Components and Render Props. We will create these returned values now. Therefore, we need to convert this component to a functional component: Then we need to get the values and event handlers from the hook. The form fields are now broken because we have stolen the state control away from the fields and given it to the component. Feel free to skip this section if you already have enough experience building forms in React. If we are going to take away state handling from the fields, we also need to take away change handling from it — which it was doing before we decided to control (pun intended) the values. We won’t be spending time trying to understand their differences, but the table below from Gosha’s post helps: Well obviously, controlled is preferable. Formik is now handling the short-lived temporary state. The first one takes state management control from the form fields and lifts the control to React state using setState. Contribute to gkhan205/react-reusable-form-component development by creating an account on GitHub. It shows few examples presenting advantages of React Hooks. Formik is one of my favorite React tools. Mixins are deprecated API… Building reusable UI components with React Hooks. Watch the video here: It’s easier and more productive to build reusable logic. They let you use state and other React features without writing a class. Lastly, errors and setErrors obviously stores and sets the validation errors if any. touchedValues and setTouchedValues stores and sets the values of all touched fields. Basically a React application is just a bunch of components in a component tree. In a sense, they’re React’s way of leaning into functions because, before them, we’d have to write them in a component and, while components have proven to be powerful and functional in and of themselves, they have to render something on the front end. For interested people more detailed comparison information can be found on the blog post by Ryan Yurkanin: https://www.freecodecamp.org/news/why-react-hooks-and-how-did-we-even-get-here-aa5ed5dc96af/ . We can reuse state and form logic without bothering about the details — just focus on creating and styling fields; leave the rest to Formik. Event Handlers React Hooks in Action teaches you to use pre-built hooks like useState, useReducer and useEffect, and to build your own hooks. Custom React hooks for form validation without the hassle. There is one root component which kicks of the rendering for all the other components below. You can see how Jared Palmer used render props to build this library by watching the video below: The video is pretty long. In fact, we can delete the state object now. HOCs disadvantage is they create additional DOM elements so when you use few HOCs, then you will see your component nested in few DOM elements. React Hooks , and are React hooks are an amazing addition to the latest react, which enables the functional components to use features like state, context, lifecycle methods, ref, etc. The React team recently released React 16.8 featuring React Hooks. Well, that is why we have custom hooks. Form states are ephemeral — they last for a very short time. We did this by setting the values prop to the component’s state items. This year, the React Native community has seen a lot of changes. This is because custom hooks are simply functions, but they can call other hooks like useState. See this as the object Formik’s render prop hands you. We are creating the values, touchedValues, and errors pairs to hold and set some internal states. * by separated functions I mean writing a logic as your own hooks that are just functions that return values or functions used for accessing and manipulating state with use of standard React hooks. 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