Reactelement vs react.fc

These three types usually confuse novice React developers.

React has revolutionized the way we think about web development. As a declarative, efficient, and flexible JavaScript library for building user interfaces, developers can easily create interactive UIs. At the heart of React's design are its fundamental building blocks: React elements, components, and nodes. Understanding these concepts is crucial for developers who aim to master React and build sophisticated applications. React elements are the smallest building blocks of React apps. They describe what you want to see on the screen.

Reactelement vs react.fc

I still recommend simply annotating props instead of using React. But if you do use React. FC in your codebase, there's no reason to remove it. FC is a type that ships with React's TypeScript types. It represents the type of a functional component, which is the building block of most modern React apps. It has a controversial history. It used to be the recommended way to type components. Then, it was considered an anti-pattern. But now, React. FC has changed. Since TypeScript 5. The main criticism of React. FC came from its earlier iteration, which included children in the props type.

We'll show you how it compares to other tools, how to set it up, and how to run your tests effectively.

We don't think of React as shipping its own types. But React's types are a core part of the framework - overseen by the React team, and co-ordinated with React's major releases. In this live coding talk, we'll look at all the types you've been missing out on. How do you get the props type from a component? How do you know what ref a component takes? Should you use React. And what's the deal with JSX.

TLDR: No. You should probably not. The consensus in the React community now seems to be that, you should avoid using React. FC because it causes the component to implicitly take children. This means the component will accept children, even if they're not supposed to. Let's take a look at the pros and cons of React. In addition to the children prop, React. FC declares an explicit return type for the component. The return type is ReactElement null; and we will get a type error if we try to return something else from the component.

Reactelement vs react.fc

Probably the most common is using the interface already provided by react: FC , which means Functional Component, if the component accept props we only need to add the prop types on it: FC. The other which is implicit by the return type is JSX. Element and widely used as well, and, before React 18, this approach was more reliable. Before React 18 there were a potential issue using FC, it has an implicit children props on it as default, so anyone using a component with the FC type could pass a children on it:. This is the implicit return type if you don't declare it. But let's suppose your component will not always return a valid JSX. Element, sometimes we want to return null or just a piece of string, JSX.

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I'd also suggest not annotating the return types of your components to avoid confusion - but if you're using TypeScript 5. Adebayo Olamilekan - Mar 3. So where the key string, and then the value is input component. We're a place where coders share, stay up-to-date and grow their careers. So if we say const Function components, often called FC, have gained popularity due to their simplicity and the introduction of hooks, which allow for state and other React features without needing a class. This is one of the most famous types in really React and TypeScript , and it's also relatively controversial. ReactElement is like an alias for JSX. And it ends up with, if I just go and look at all of these, oh my God, do this funny dance again, I end up with a ABBA all of these keys inside a big union. Anuradha Kumari VodafoneZiggo. Are you sure you want to hide this comment?

FC is a type that stands for "Function Component" in React.

So that gives you an idea of how these GSX intrinsic elements work. This opens the door to faster declaration generation in TypeScript itself, as well as in external tools written in other languages such as ESBuild and swc. So like onChange and name and all that sort of stuff. Are you a React developer trying to get the most benefits from TypeScript? They came up with the idea for. And it's mega useful if you have those third party components that you are not in control of, but you want the props from. Eduardo San Martin Morote. Share this article with your friends share on twitter share on linkedin share on reddit copy url to clipboard. They describe what you want to see on the screen. Now we can return whatever we want from it. And if you don't understand the types that come with React , you're not going to have a very good time using React with TypeScript. Learn how to set up TypeScript to bundle a Node app using pnpm, Node. Anuradha Kumari VodafoneZiggo. This meant that perfectly valid components would fall prey to strange errors:. Next we're gonna talk about a global type in React called React.