Guides How to fix: Prop types validation error – is missing in props validation (2022) ‘React eslint error missing in props validation’ error appears when trying to compile your React App? There are a number of ways to fix this quickly, but here’s the fastest; To fix the ‘React eslint error missing in props validation’ when developing a React app, we can set the prop types of the props in the component causing the error. For instance, we write: import React from 'react' function Header({ setIsAdding }) { return ( <header> <div><button> setIsAdding(true)} className="specialButton"> Add Employee </button> </div> </header>) } export default Header For this to work across different components, import the prop-types package to let us add prop type validation to the component. Just run this install from the terminal and restart your development server; npm i prop-types PropTypes exports a range of validators that can be used to make sure the data you receive is valid. When an invalid value is provided for a prop, a warning will be shown in the JavaScript console. For performance reasons, propTypes is only checked in development mode. Good luck! Check out more fixes on Devs n Techies Share This Comments (0) Leave a Reply Cancel replyYou must be logged in to post a comment. May 26, 2022