react-logger.js

// put this at the top of your app
const setState = Component.prototype.setState
Component.prototype.setState = function(nextState) {
  console.group(this.constructor.name)
  console.trace()
  if (this.shouldComponentUpdate) {
    console.log('shouldComponentUpdate', (
      this.shouldComponentUpdate(this.props, nextState)
    ))
  }
  console.log('props', this.props)
  console.log('state', this.state)
  console.log('nextState', nextState)
  console.groupEnd(this.constructor.name)
  return setState.apply(this, arguments)
}