PropCheckMixin.js

// yell at any developers using `this.props.whatever` if PropTypes.whatever is not set
let PropCheckMixin = {
  componentWillMount() {
    this.validateProps(this.props)
  },

  componentWillReceiveProps(nextProps) {
    this.validateProps(nextProps)
  },

  validateProps(props) {
    let { displayName, propTypes } = this.constructor

    for (let prop in props) {
      if (!propTypes[prop]) {
        console.warn(`You set a property "${prop}" on Component "${displayName}" but did not provide a PropType declaration for this prop.`)
      }
    }
  }
}

module.exports = PropCheckMixin

This is really helpful! Tnx!

this seems helpful, refer http://viget.com/extend/check-your-props

I have developed a higher order component that does this.

https://github.com/gajus/react-strict-prop-types

It is more or less the same as this mixin. The source code is written in ES6 and uses ES6 classes. It also adds support for HTML properties using allowHTMLProps option.