Moment.js with ReactJS (ES6)

I know, question is a bit old, but since am here looks like people are still looking for solutions.

I'll suggest you to use react-moment link,

react-moment comes with handy JSXtags which reduce a lot of work. Like in your case :-

import React  from 'react';
import Moment from 'react-moment';

exports default class MyComponent extends React.Component {
    render() {
        <Moment format="YYYY/MM/DD">{this.props.dateToFormat}</Moment>
    }
}

I have Used it as follow and it is working perfectly.

import React  from 'react';
import * as moment from 'moment'

exports default class MyComponent extends React.Component {
    render() {
            <div>
              {moment(dateToBeFormate).format('DD/MM/YYYY')}
            </div>            
    }
}

Since you are using webpack you should be able to just import or require moment and then use it:

import moment from 'moment'

...
render() {
    return (
        <div>
            { 
            this.props.data.map((post,key) => 
                <div key={key} className="post-detail">
                    <h1>{post.title}</h1>
                    <p>{moment(post.date).format()}</p>
                    <p dangerouslySetInnerHTML={{__html: post.content}}></p>
                    <hr />
                </div>
            )}
        </div>
    );
}
...