Useless PropTypes declaration should be removed

• REACT_USELESS_PROP_TYPES
• Code Quality
• Low
• react

This rule applies when a PropTypes declaration exists for a property but the property is not used for the implementation of the component.

For maintainability, it is recommended to remove useless PropTypes declarations.

Note: This rule is based on React 17 API specifications.

Noncompliant Code Example

import PropTypes from 'prop-types';

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

Hello.propTypes = {
  name: PropTypes.string,
  age: PropTypes.number // REACT_USELESS_PROP_TYPES alarm because this property 'age' is not used.
};

Compliant Code Example

import PropTypes from 'prop-types';

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

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

Version

This rule was introduced in DeepScan 1.3.0-beta.

See

• Typechecking with PropTypes