import React, { PropTypes } from 'react'; import { connect } from 'react-redux'; import DevTools from './components/DevTools'; require('es6-promise').polyfill(); class App extends React.Component { constructor(props, context) { super(props, context); this.state = { isMounted: false }; } componentDidMount() { this.setState({ isMounted: true }); // eslint-disable-line react/no-did-mount-set-state } render() { return (