Creating a form in React without a form library In my opinion, it is an easy library to work with due to the documentation being easy to navigate as well as the flexibility of form control that is provided - a developer can develop basic forms with default html input fields, or they can develop complex forms with programatic behaviour that uses both custom, in-built and external components. In addition, it is a really lightweight package with zero dependencies, and can have easy integration with component libraries. The use cases for React Hook Forms is how easy it is to handle event handlers such as onSubmit, onChange, onBlur etc. React Hook Forms serve as an alternative to another popular form library, Formik. The callbacks passed by FilterableProductTable will call setState(), and the app will be updated.React Hook Forms is a form library for React applications to build forms with easy to configure validation through the process of calling hooks to build form state and context. We can use the onChange event on the inputs to be notified of it. Since components should only update their own state, FilterableProductTable will pass callbacks to SearchBar that will fire whenever the state should be updated. We want to make sure that whenever the user changes the form, we update the state to reflect the user input. Let’s think about what we want to happen. This is intentional, as we’ve set the value prop of the input to always be equal to the state passed in from FilterableProductTable. If you try to type or check the box in the previous version of the example (step 4), you’ll see that React ignores your input. React makes this data flow explicit to help you understand how your program works, but it does require a little more typing than traditional two-way data binding. Now it’s time to support data flowing the other way: the form components deep in the hierarchy need to update the state in FilterableProductTable. So far, we’ve built an app that renders correctly as a function of props and state flowing down the hierarchy. See the Pen Thinking In React: Step 5 on CodePen. You’ll see that the data table is updated correctly. You can start seeing how your application will behave: set filterText to "ball" and refresh your app. Finally, use these props to filter the rows in ProductTable and set the values of the form fields in SearchBar. Then, pass filterText and inStockOnly to ProductTable and SearchBar as a prop. To FilterableProductTable’s constructor to reflect the initial state of your application.
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