_reactDom2.default.render is not a function

Update react and react-dom to "^15.2.1" works for me. I hope it will help you.

Initially, I was doing this.

import React from 'react-dom';
import ReactDom from 'react-dom';

And soon I realized what I was doing wrong and updated the above statements as follows.

import React from 'react';
import ReactDom from 'react-dom';

Hope it helps.

You can change something in your Maincontainner component.

1. Add it top: import ReactDOM from 'react-dom';
2. Change render to ReactDOM.render