The ReactDOMServer object enables you to render components to static markup. Typically, it’s used on a Node server:

// ES modules
import ReactDOMServer from 'react-dom/server';
// CommonJS
var ReactDOMServer = require('react-dom/server');

I suggest you write it like this:

const ReactDOMServer = require('react-dom/server');
const appHtml = ReactDOMServer.renderToStaticMarkup (
    <Provider store={store}>
      <StaticRouter location={location} context={routeContext}>
        <App />
These additional methods depend on a package (stream) that is only available on the server, and won’t work in the browser.

If you call ReactDOM.hydrate() on a node that already has this server-rendered markup, React will preserve it and only attach event handlers, allowing you to have a very performant first-load experience.

If you plan to use React on the client to make the markup interactive, do not use this method. Instead, use renderToString on the server and ReactDOM.hydrate() on the client.

The stream returned from this method will return a byte stream encoded in utf-8. If you need a stream in another encoding, take a look at a project like iconv-lite, which provides transform streams for transcoding text.


Can be workarounded by not capturing the comas

str.replace(/<L href="(.*?)">(.*?)<\/L>/g, ReactDOMServer.renderToString(<L href="$1">$1</L>))

Pass a string when you want to render HTML elements as described in React docs.


There is no way to get the window width on the server side. A workaround would be to use the useragent from the incoming request to determine which component should be rendered on the server.

const deviceType = useDeviceType();
return deviceType === 'mobile' ? <MobileLayout /> : <DesktopLayout />;


React Testing Recipes Multiple Renderers

React Testing Recipes Snapshot Testing

React Testing Recipes Timers

React Testing Recipes Events

React Testing Recipes Mocking Modules

React Testing Recipes Data Fetching

React Testing Recipes Rendering

React Testing Recipes act()

React Testing Recipes Setup/Teardown

React Rendering Elements Updating the Rendered Element

React Rendering Elements Rendering an Element into the DOM

React Rendering Elements

React Component State What is the difference between passing an object or a function in setState?

React Component State Why is setState giving me the wrong value?

React Refs and the DOM Callback Refs

React Refs and the DOM Accessing Refs Refs and Function Components

React Refs and the DOM Accessing Refs Adding a Ref to a Class Component

React Refs and the DOM Accessing Refs Adding a Ref to a DOM Element

React Refs and the DOM Accessing Refs

React Refs and the DOM Creating Refs

File Structure Is there a recommended way to structure React projects? Grouping by file type

File Structure Is there a recommended way to structure React projects? Grouping by features or routes

Glossary of React Terms Components props.children

Glossary of React Terms Components props

Glossary of React Terms Components

Glossary of React Terms Elements

Glossary of React Terms JSX

React Code-Splitting Named Exports

React Code-Splitting Route-based code splitting

Code-Splitting React.lazy Error boundaries

Code-Splitting React.lazy

React Code-Splitting import()

React Code-Splitting Bundling Example

React Test Utilities Other Utilities Simulate

React Test Utilities Reference renderIntoDocument()

React Test Utilities Reference findRenderedComponentWithType()

React Test Utilities Reference scryRenderedComponentsWithType()

React Test Utilities Reference findRenderedDOMComponentWithTag()

React Test Utilities Reference scryRenderedDOMComponentsWithTag()

React Test Utilities Reference findRenderedDOMComponentWithClass()

React Test Utilities Reference scryRenderedDOMComponentsWithClass()

React Test Utilities Reference findAllInRenderedTree()

React Test Utilities Reference isCompositeComponentWithType()

React Test Utilities Reference isCompositeComponent()

React Test Utilities Reference isDOMComponent()

React Test Utilities Reference isElementOfType()

React Test Utilities Reference isElement()

React Test Utilities Reference mockComponent()

React Test Utilities Reference act()

React Test Utilities

React Profiler API onRender Callback

React Profiler API Usage

React AJAX and APIs Example: Using AJAX results to set local state

React.Component Class Properties defaultProps

React.Component Other APIs forceUpdate()

React.Component Other APIs setState()

React.Component Reference UNSAFE_componentWillUpdate()

React.Component Reference UNSAFE_componentWillReceiveProps()

React.Component Reference UNSAFE_componentWillMount()

React.Component Reference componentDidCatch()

React.Component Reference static getDerivedStateFromError()

React.Component Reference getSnapshotBeforeUpdate()

React.Component Reference static getDerivedStateFromProps()

React.Component Reference shouldComponentUpdate()

React.Component Reference componentWillUnmount()