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javascriptreactjsreact-propsreact-proptypes
Alan Jenshen
Alan Jenshen

Reputation: 3239

PropTypes in functional stateless component

Without using class, how do I use PropTypes in functional stateless component of react?

export const Header = (props) => (
   <div>hi</div>
)

Upvotes: 125

Views: 72517

Answers (5)

Mike
Mike

Reputation: 6239

The official docs show how to do this with ES6 component classes, but the same applies for stateless functional components.

Firstly, npm install / yarn add the prop-types package if you haven't already.

Then, add your propTypes (and defaultProps too if required) after the stateless functional component has been defined, before you export it.

import React from "react";
import PropTypes from "prop-types";

const Header = ({ name }) => <div>hi {name}</div>;

Header.propTypes = {
  name: PropTypes.string
};

// Same approach for defaultProps too
Header.defaultProps = {
  name: "Alan"
};

export default Header;

Upvotes: 180

storenth
storenth

Reputation: 1255

Since React 15, use propTypes to validate props and provide documentation this way:

import React from 'react';
import PropTypes from 'prop-types';

export const Header = (props={}) => (
   <div>{props}</div>
);
Header.propTypes = {
  props: PropTypes.object
};

This code on the assumption of default value props={} if no props provided to the component.

Upvotes: -1

Ashutosh Tiwari
Ashutosh Tiwari

Reputation: 1597

It's done the same way you do with Class Based Components

import PropTypes from "prop-types";

    const = function_name => {}

    function_name.propTypes = {
       prop_name : PropTypes.number
       . . . . . . . . . . . . . .
    }

Hope This Helps !

Upvotes: 2

lokeshj
lokeshj

Reputation: 948

Same way you do in class based components:

   import PropTypes from 'prop-types';

   const funcName = (props) => {
       ...
   }
   funcName.propTypes = {
       propName: PropTypes.string.isRequired
   }

Note: You might have to install prop-types via npm install prop-types or yarn add prop-types, depending on the React version you are using.

Upvotes: 1

I Putu Yoga Permana
I Putu Yoga Permana

Reputation: 4220

It isn't different with the stateful, You can add it like:

import PropTypes from 'prop-types';
Header.propTypes = {
  title: PropTypes.string
}

Here is a link to prop-types npm

Upvotes: 33

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