What's the difference between hydrate() and render() in React 16?

Question

I\'ve read the documentation, but I didn\'t really understand the difference between hydrate() and render() in React 16.

I know hydrate()

Answer 1

In addition to above...

ReactDOM.hydrate() is same as render(), but it is used to hydrate(attach event listeners) a container whose HTML contents were rendered by ReactDOMServer. React will attempt to attach event listeners to the existing markup.

Using ReactDOM.render() to hydrate a server-rendered container is deprecated because of slowness and will be removed in React 17 so use hydrate() instead.