Coding⏱️ 3 min read📅 2026-06-03

How to Fix: React eslint error missing in props validation

Quick Answer:

React eslint error 'react/prop-types onClickOut; is missing in props validation' occurs when the 'onClickOut' prop is not properly validated for a React component.

This error affects developers who use React with functional components, as it can cause unexpected behavior and errors.

💡 Why You Are Getting This Error

  • The primary reason for this error is that the 'propTypes' object is not correctly defined or exported in the component file.
  • Another possible cause is that the 'onClickOut' prop is not properly typed or is missing from the component's props validation.

🛠️ Step-by-Step Verified Fixes

Enabling Prop Types Validation

  1. Step 1: Import PropTypes from the 'prop-types' package: import PropTypes from 'prop-types';
  2. Step 2: Define and export the propTypes object in the component file, ensuring it includes all required props: static propTypes = {{ children: PropTypes.any, onClickOut: PropTypes.func }};
  3. Step 3: Use the 'withProps' higher-order component (HOC) or a library like 'prop-types-optional' to enable prop types validation for the component.

Using a Linter or IDE Plugin

  1. Step 1: Configure your preferred linter or IDE plugin to enforce prop types validation, such as ESLint with 'react-prop-types' extension.
  2. Step 2: Update your project's configuration files (e.g., `package.json`) to include the required dependencies and configurations for prop types validation.

✨ Wrapping Up

By following these steps, you should be able to resolve the React eslint error 'react/prop-types onClickOut; is missing in props validation' and ensure proper prop types validation for your React components.

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