Sooner or later every React developer has to handle forms. The following tutorial will give you a comprehensive overview about forms in React. You will learn how to manage form state in React, the difference of controlled and uncontrolled forms (state vs reference), how to submit a form (e.g. callback handler), and how to reset a form (e.g. after…

When using React's useState Hook in TypeScript, the method usually infers the implicit type for the returned state from the provided argument automatically. In the following example, React's useState Hook in a function component knows that it deals with a number type. Hence the returned state (here: count ) has the type number in addition to…

A brief summary of how to use React's useRef Hook for using a ref with TypeScript. First, a ref in React is mainly used to assign a HTML element to it. The assigned HTML element gives us imperative read and write operations on it which allows us to programmatically call functions. Take the following example for focusing an input element: When using…

React Elements, Components, and Instances are different terms in React which work closely together. This guide will walk you through all three terms and explain them step by step. We will start off with the following code snippet as example: A React component is literally the declaration of a component as we see it in the previous code snippet…

You may have noticed the "as" prop when working with modern UI component libraries . Essentially the "as" prop allows you to replace rendered HTML elements in a React component from the outside by passing them in as props : Usually it is called "as" prop, however, one can see it also as "component", "element", "variant" prop -- or a combination…

Batching in React describes the internal implementation detail of React which treats multiple state updates as one state update. The benefit: multiple state updates are batched as one state update and therefore trigger only one re-rendering of the component which improves the rendering performance especially for larger React applications. Let's…

Higher-Order Components in React, also known as HOCs , are an advanced component pattern in React (next to Render Props Components ). Higher-Order Components can be used for multiple use cases. I want to pick out one use case, the conditional rendering with Higher-Order Components, to give you two outcomes from this article as a learner. First…

A button may be the first interactive element that you are using in a React component. Therefore, this is a short React tutorial by example for beginners about creating a button in React, how to use it, and how to extract it as a reusable component. First of all, a button is just an HTML button element which can be rendered in React's JSX: By using…

React introduced Hooks quite a while ago. With their release, Hooks gave function components the ability to use state and side-effects with built-in Hooks such as React's useState Hook and React's useEffect Hook . There are only a handful built-in Hooks (e.g. useReducer , useCallback , useMemo , useContext ) provided by React though…