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DEV Community
dev.to › prithpalsooriya › how-to-type-react-defaultprops-ji6
How to Type React DefaultProps - DEV Community
July 22, 2021 - export interface ListProps { items: string[]; filterPredicate?: (item: string) => boolean; onSelect?: (item: string) => void; onMultiSelect?: (items: string[]) => void; createKey?: (item: string, index: number) => string; // ... a lot of props } class List extends React.Component<ListProps> { static defaultProps: Partial<ListProps> = { // defaults for most props except `items` // because we want it will always be required right??
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MUI
mui.com › material-ui › react-alert
React Alert component - Material UI
Add an action to your Alert with the action prop. This lets you insert any element—an HTML tag, an SVG icon, or a React component such as a Material UI Button—after the Alert's message, justified to the right.
Discussions

Design decision: keep defaultProps for functional components
Since default props are a static ... Component.defaultProps.something or in a unit test. There is no way to take default values from function default values. In a recent article, I have an example that is based on default props and styled-components/emotion. // scroll down to the section React and Typescript ... More on github.com
🌐 github.com
3
October 1, 2019
React - Override Default Props
Hi, I want to learn how to show the default props on UI. For example in here, we have a default props called quantity and its set to 0. How can I use it in the Parent component so it can show the default value? Your cod… More on forum.freecodecamp.org
🌐 forum.freecodecamp.org
0
0
June 10, 2023
reactjs - How to define defaultProps in React 18 TypeScript without optionals - Stack Overflow
Using React functional components, it's recommended to no longer use Component.defaultProps. More on stackoverflow.com
🌐 stackoverflow.com
How to declare nested default props as it's now deprecated ?
You need to add a default value for options and assign a different name to either the className inside label or inside input: const TextInput = ({ options: { withLabel = true, defaultLabelClass = true, defaultInputClass = true } = {}, label: { label = 'Label', className: labelClassname = undefined }, input: { type = 'text', name = 'input', id = 'input', placeholder = 'Placeholder', className = undefined , onChange = undefined}, }: TextInputProps) => { } TS playground More on reddit.com
🌐 r/react
5
3
November 12, 2023
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GeeksforGeeks
geeksforgeeks.org › reactjs › reactjs-proptypes
ReactJS PropTypes - GeeksforGeeks
2 weeks ago - App & index.js render all components with props, using ReactDOM.createRoot() inside <React.StrictMode> for best practices and error handling. ... By using the defaultProps we can also specify the default values for props.
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React Native
reactnative.dev › docs › textinput
TextInput · React Native
2 weeks ago - A foundational component for inputting text into the app via a keyboard. Props provide configurability for several features, such as auto-correction, auto-capitalization, placeholder text, and different keyboard types, such as a numeric keypad.
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Remotion
remotion.dev › api overview
API overview | Remotion | Make videos programmatically
5 days ago - React Native Skia <Canvas> wrapper · Include a Lottie animation in your video · <Lottie> Embed a Lottie animation in Remotion · getLottieMetadata() Get metadata of a Lottie animation · staticFile() Load Lottie animations from a static file · Preload media for the Player ·
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GitHub
github.com › facebook › react › issues › 16970
Design decision: keep defaultProps for functional components · Issue #16970 · facebook/react
October 1, 2019 - const defaultProps = { Wrapper: styled.div``, }; type Props = typeof defaultProps & {}; const Component = (props: Props): JSX.Element => { const {Wrapper} = {...defaultProps, ...props}; return <Wrapper /> }; Component.defaultProps = defaultProps; export default Component;
Author   marcelmokos
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React
react.dev › reference › react-dom › components › input
<input> – React
To render a controlled input, pass the value prop to it (or checked for checkboxes and radios). React will force the input to always have the value you passed.
Find elsewhere
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freeCodeCamp
forum.freecodecamp.org › javascript
React - Override Default Props
June 10, 2023 - { return Current Quantity of Items in Cart: {props.quantity} } Items.defaultProps = { quantity: 0 } class ShoppingCart extends React.Component { constructor(props) { super(props); } render() { { /* Change code below ...
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GeeksforGeeks
geeksforgeeks.org › reactjs › reactjs-defaultprops
ReactJS defaultProps - GeeksforGeeks
July 23, 2025 - defaultProps is an essential feature in React that ensures components always have a value for their props, even if the parent component doesn't pass one. It makes your code more predictable and helps avoid errors from undefined props.
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React
legacy.reactjs.org › docs › typechecking-with-proptypes.html
Typechecking With PropTypes – React
class Greeting extends React.Component { render() { return ( <h1>Hello, {this.props.name}</h1> ); } } // Specifies the default values for props: Greeting.defaultProps = { name: 'Stranger' }; // Renders "Hello, Stranger": const root = ReactDOM.createRoot(document.getElementById('example')); root.render(<Greeting />);
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LogRocket
blog.logrocket.com › home › a complete guide to react default props
A complete guide to React default props - LogRocket Blog
September 2, 2024 - const ThemedButton = React.createClass({ // Component display name displayName: 'ThemedButton', // render() method render() { const { theme, label, ...props } = this.props; return <button className={`btn btn-${theme}`} {...props}>{ label }</button> }, // Set default props ThemedButton.defaultProps = { theme: "secondary", label: "Button Text" }; })
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React
react.dev › learn › passing-props-to-a-component
Passing Props to a Component – React
You can think of props like “knobs” that you can adjust. They serve the same role as arguments serve for functions—in fact, props are the only argument to your component! React component functions accept a single argument, a props object:
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Medium
medium.com › @matanbobi › react-defaultprops-is-dying-whos-the-contender-443c19d9e7f1
React defaultProps is dying, who’s the contender? | by Matan Borenkraout | Medium
March 18, 2026 - While using defaultProps is the ... main advantage defaultProps has is it gives us a unified way of setting default values to props in both class components and functional components....
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React TypeScript Cheatsheets
react-typescript-cheatsheet.netlify.app › typing defaultprops
Typing defaultProps | React TypeScript Cheatsheets
In that way we can extend defaultProps without any changes in the types! interface IMyComponentProps { firstProp?: string; secondProp: IPerson[]; } export class MyComponent extends React.Component<IMyComponentProps> { public static defaultProps: Partial<IMyComponentProps> = { firstProp: "default", }; }
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React
legacy.reactjs.org › docs › react-component.html
React.Component – React
Normally you should try to avoid all uses of forceUpdate() and only read from this.props and this.state in render(). defaultProps can be defined as a property on the component class itself, to set the default props for the class.
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Frontend Armory
frontarm.com › courses › react-fundamentals › odds-and-ends › proptypes-and-defaultprops
propTypes and defaultProps – Frontend Armory
React components can also have a special defaultProps property. When you assign an object to defaultProps, React will merge that object with the props provided to createElement() when needed.
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Reddit
reddit.com › r/react › how to declare nested default props as it's now deprecated ?
r/react on Reddit: How to declare nested default props as it's now deprecated ?
November 12, 2023 -

Hi,

on a new project I have this warning :

"Support for defaultProps will be removed from function components in a future major release. Use JavaScript default parameters instead."

But I can't figure out how should I do to declare the default value ?

Here is one of my component that have nested props :

const TextInput = ({ options, label, input }: TextInputProps) => {// logic here}

And I typed it like this :

export type TextInputProps = {
  options?: {
    withLabel?: boolean
    defaultLabelClass?: boolean
    defaultInputClass?: boolean
  }
  label: {
    label: string
    className?: string
  }
  input: {
    type: string
    name: string
    for: string
    id: string
    className?: string
    placeholder?: string
    required?: boolean
    onChange?: (e: React.ChangeEvent<HTMLInputElement>) => void
  }
}

export const TextInputDefaultProps = {
  options: {
    withLabel: true,
    defaultLabelClass: true,
    defaultInputClass: true,
  },
  label: {
    className: undefined,
  },
  input: {
    className: undefined,
    placeholder: undefined,
    required: false,
    onChange: undefined,
  },
}

I did try something like this but it does not work:

const TextInput = ({
  options: { withLabel = true, defaultLabelClass = true, defaultInputClass = true },
  label: { label = 'Label', className = undefined },
  input: { type = 'text', name = 'input', id = 'input', placeholder = 'Placeholder', className = undefined , onChange = undefined},
}) => {

So how are we suppose to deal with nested props ?

Thanks :)

🌐
GitHub
github.com › jsx-eslint › eslint-plugin-react › issues › 2396
`defaultProps` rule to be deprecated on function components · Issue #2396 · jsx-eslint/eslint-plugin-react
August 29, 2019 - defaultProps on function components is getting deprecated by React (see: facebook/react#16210) For this rule to follow suit, it should only be triggered when missing from class components. The official recommendation in future versions o...
Author   amypellegrini
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GitHub
github.com › emotion-js › emotion › issues › 2573
Include `.defaultProps` in the documentation · Issue #2573 · emotion-js/emotion
November 29, 2021 - Include .defaultProps in the documentation#2573 · Copy link · Labels · feature request · drldavis · opened · on Nov 29, 2021 · Issue body actions · Description: It took me forever to figure out how to set default props with emotion's styled components.
Author   drldavis