connect-final.js

function compose(composeFn, param) {
  if(typeof composeFn != "function") 
    return {}
  
  return composeFn(param)
}

function connectProps(store, mapStateToProps, mapDispatchToProps) {
  return {
    ...compose(mapStateToProps, store.getState()),
    ...compose(mapDispatchToProps, store.dispatch)
  }
}


export function connect(mapStateToProps, mapDispatchToProps) {
    return (Target) => {
        class Connected extends Component {
            componentWillMount() {
                this.componentWillUpdate()
            }
            componentWillUpdate() {
                this.connectedProps = connectProps(
                  this.context.store,
                  mapStateToProps,
                  mapDispatchToProps
                )
            }
            render() {
                return (<Target {...this.props} {...this.connectedProps}/>)
            }
        }

        return Connected
    }
}