redux-set-state.js

import React, { Component } from 'react'

const click = () => ({
  type: 'CLICK'
})

const reducer = (state={clicked: false}, action) => {
  switch (action.type) {
    case 'CLICK':
      return {
        clicked: true
      }
      
    default: return state
  }
}

class Thing extends Component {
  dispatch(action) {
    this.setState(reducer(this.state, action))
  }
  
  render() {
    return <div onClick={() => this.dispatch(click())} />
  }
}