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This is intended as a basic orientation and reference for React developers familiarizing with TypeScript. Basic Prop Types ExamplesA list of TypeScript types you will likely use in a React+TypeScript app: type AppProps = { message: string; count: number; disabled: boolean; /** array of a type! */ names: string[]; /** string literals to specify exact string values, with a union type to join them t
These can be written as normal functions that take a props argument and return a JSX element. // Declaring type of props - see "Typing Component Props" for more examples type AppProps = { message: string; }; /* use `interface` if exporting so that consumers can extend */ // Easiest way to declare a Function Component; return type is inferred. const App = ({ message }: AppProps) => <div>{message}</
Wrapping/MirroringWrapping/Mirroring a HTML ElementUsecase: you want to make a <Button> that takes all the normal props of <button> and does extra stuff. Strategy: extend React.ComponentPropsWithoutRef<'button'> // usage function App() { // Type '"foo"' is not assignable to type '"button" | "submit" | "reset" | undefined'.(2322) // return <Button type="foo"> sldkj </Button> // no error return <B
PrerequisitesYou can use this cheatsheet for reference at any skill level, but basic understanding of React and TypeScript is assumed. Here is a list of prerequisites: Basic understanding of React.Familiarity with TypeScript Basics and Everyday Types.In the cheatsheet we assume you are using the latest versions of React and TypeScript. React and TypeScript starter kitsReact has documentation for
The @types typings export both "public" types meant for your use as well as "private" types that are for internal use. Check SaltyCrane's React TypeScript Cheatsheet for a nice autogenerated complete reference. @types/reactLink to .d.ts Namespace: React Most Commonly Used Interfaces and Types ReactNode - anything that is renderable inside of JSX, this is NOT the same as what can be rendered by a
React TypeScript CheatsheetsCheatsheets for experienced React developers getting started with TypeScript
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