Generic State component for React.

State.js

import React from "react";
import isFunction from "lodash/isFunction";

class State extends React.Component {
  constructor(...args) {
    super(...args);

    this.boundSetState = this.setState.bind(this);

    this.state = isFunction(this.props.initialState)
      ? { ...this.props.initialState(this.boundSetState) }
      : { ...this.props.initialState };
  }

  render() {
    return this.props.children(this.state, this.boundSetState);
  }
}

export { State };

Probably best to use react-powerplug instead.