Prop types in react

React propthpes or

size: PropTypes.oneOfType([
  PropTypes.string,
  PropTypes.number
]),

Source: stackoverflow.com

React proptypes

import PropTypes from 'prop-types';

class Greeting extends React.Component {
  render() {
    return (
      <h1>Hello, {this.props.name}</h1>
    );
  }
}

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

Source: reactjs.org

Reactnode prop-types

import PropTypes from 'prop-types';

MyComponent.propTypes = {
  // You can declare that a prop is a specific JS type. By default, these
  // are all optional.
  optionalArray: PropTypes.array,
  optionalBool: PropTypes.bool,
  optionalFunc: PropTypes.func,
  optionalNumber: PropTypes.number,
  optionalObject: PropTypes.object,
  optionalString: PropTypes.string,
  optionalSymbol: PropTypes.symbol,

  // Anything that can be rendered: numbers, strings, elements or an array
  // (or fragment) containing these types.
  optionalNode: PropTypes.node,

  // A React element.
  optionalElement: PropTypes.element,

  // A React element type (ie. MyComponent).
  optionalElementType: PropTypes.elementType,

  // You can also declare that a prop is an instance of a class. This uses
  // JS's instanceof operator.
  optionalMessage: PropTypes.instanceOf(Message),

  // You can ensure that your prop is limited to specific values by treating
  // it as an enum.
  optionalEnum: PropTypes.oneOf(['News', 'Photos']),

  // An object that could be one of many types
  optionalUnion: PropTypes.oneOfType([
    PropTypes.string,
    PropTypes.number,
    PropTypes.instanceOf(Message)
  ]),

  // An array of a certain type
  optionalArrayOf: PropTypes.arrayOf(PropTypes.number),

  // An object with property values of a certain type
  optionalObjectOf: PropTypes.objectOf(PropTypes.number),

  // An object taking on a particular shape
  optionalObjectWithShape: PropTypes.shape({
    color: PropTypes.string,
    fontSize: PropTypes.number
  }),

  // An object with warnings on extra properties
  optionalObjectWithStrictShape: PropTypes.exact({
    name: PropTypes.string,
    quantity: PropTypes.number
  }),   

  // You can chain any of the above with `isRequired` to make sure a warning
  // is shown if the prop isn't provided.
  requiredFunc: PropTypes.func.isRequired,

  // A required value of any data type
  requiredAny: PropTypes.any.isRequired,

  // You can also specify a custom validator. It should return an Error
  // object if the validation fails. Don't `console.warn` or throw, as this
  // won't work inside `oneOfType`.
  customProp: function(props, propName, componentName) {
    if (!/matchme/.test(props[propName])) {
      return new Error(
        'Invalid prop `' + propName + '` supplied to' +
        ' `' + componentName + '`. Validation failed.'
      );
    }
  },

  // You can also supply a custom validator to `arrayOf` and `objectOf`.
  // It should return an Error object if the validation fails. The validator
  // will be called for each key in the array or object. The first two
  // arguments of the validator are the array or object itself, and the
  // current item's key.
  customArrayProp: PropTypes.arrayOf(function(propValue, key, componentName, location, propFullName) {
    if (!/matchme/.test(propValue[key])) {
      return new Error(
        'Invalid prop `' + propFullName + '` supplied to' +
        ' `' + componentName + '`. Validation failed.'
      );
    }
  })
};

Source: reactjs.org

Import prop-types

import PropTypes from 'prop-types'; // ES6var PropTypes = require('prop-types'); // ES5 with npm

Source: npmjs.com

Prop-types

npm install --save prop-types

-1

Source: npmjs.com

Prop types in react

import PropTypes from 'prop-types'

function HelloWorldComponent({ name }) {
  return (
    <div>Hello, {name}</div>
  )
}

HelloWorldComponent.propTypes = {
  name: PropTypes.string
}

export default HelloWorldComponent

-1

Source: reactjs.org

Similar codes

2 votes385 views1 answer
React router 6 navigate
Javascript React
4 votes344 views1 answer
React props.children proptype
Javascript React
0 vote373 views1 answer
How to change the choose file button text in react
Javascript React
0 vote322 views2 answers
Create a reactjs app with backend and docker
Javascript React
0 vote326 views1 answer
React app link description preview
Javascript React
22 votes313 views4 answers
Npm react copy to clipboard
Javascript React
5 votes354 views1 answer
Deploy react js heroku
Javascript React
0 vote345 views1 answer
My vscode does not recognize react code syntax
Javascript React
0 vote395 views1 answer
Login condition if and else in router dom of react jsx
Javascript React
19 votes336 views2 answers
Devtools failed to load sourcemap when debugging react native
Javascript React