Terms / Privacy / Search / Support

import { renderToString } from 'react-dom/server'
import { ServerStyleSheet } from 'styled-components'

const sheet = new ServerStyleSheet()
try {
  const html = renderToString(sheet.collectStyles(<YourApp />))
  const styleTags = sheet.getStyleTags() // or sheet.getStyleElement();
} catch (error) {
  // handle error
  console.error(error)
} finally {
  sheet.seal()
}<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">function</span> <span class="token function">renderToString</span><span class="token punctuation">(</span><span class="token parameter">element<span class="token operator">:</span> ReactElement</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">string</span>
<span class="token keyword">import</span> renderToString</code><div class="typing-tooltip-markup">Render a React element to its initial HTML. This should only be used on the server.
React will return an HTML string. You can use this method to generate HTML on the server
and send the markup down on the initial request for faster page loads and to allow search
engines to crawl your pages for SEO purposes.<br><br>If you call <code>ReactDOM.hydrate()</code> 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.</div></pre>

Docs0

import { renderToNodeStream } from 'react-dom/server'
import styled, { ServerStyleSheet } from 'styled-components'

// if you're using express.js, you'd have access to the response object "res"

// typically you'd want to write some preliminary HTML, since React doesn't handle this
res.write('<html><head><title>Test</title></head><body>')

const Heading = styled.h1`
  color: red;
`

const sheet = new ServerStyleSheet()
const jsx = sheet.collectStyles(<Heading>Hello SSR!</Heading>)
const stream = sheet.interleaveWithNodeStream(renderToNodeStream(jsx))

// you'd then pipe the stream into the response object until it's done
stream.pipe(
  res,
  { end: false }
)

// and finalize the response with closing HTML
stream.on('end', () => res.end('</body></html>'))<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">function</span> <span class="token function">renderToNodeStream</span><span class="token punctuation">(</span><span class="token parameter">element<span class="token operator">:</span> ReactElement</span><span class="token punctuation">)</span><span class="token operator">:</span> NodeJS<span class="token punctuation">.</span>ReadableStream
<span class="token keyword">import</span> renderToNodeStream</code><div class="typing-tooltip-markup">Render a React element to its initial HTML. Returns a Readable stream that outputs
an HTML string. The HTML output by this stream is exactly equal to what
<code>ReactDOMServer.renderToString()</code> would return.</div></pre>

Docs0

const {debug} = await render(AppComponent)

debug()<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token keyword">const</span> debug<span class="token operator">:</span> <span class="token builtin">any</span></code></pre>

Docs0

const {fixture} = await render(AppComponent)

const componentInstance = fixture.componentInstance as AppComponent<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token keyword">const</span> fixture<span class="token operator">:</span> <span class="token builtin">any</span></code></pre>

Docs0

await render(AppComponent, {
  queries: {...queries, ...customQueries},
})<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token builtin">any</span></code></pre>

Docs0

await render(AppComponent, {
  componentProviders: [AppComponentService],
})<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token builtin">any</span></code></pre>

Docs0

await render(AppComponent, {
  providers: [
    CustomersService,
    {
      provide: MAX_CUSTOMERS_TOKEN,
      useValue: 10,
    },
  ],
})<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token builtin">any</span></code></pre>

Docs0

await render(SpoilerDirective, {
  template: `<div spoiler message='SPOILER'></div>`,
})<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token builtin">any</span></code></pre>

Docs0

const {getByText, queryByLabelText} = await render(AppComponent)

getByText('Hello world')
queryByLabelText('First name:')<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token keyword">const</span> getByText<span class="token operator">:</span> <span class="token builtin">any</span></code></pre>

Docs0

import {render, screen, fireEvent} from '@testing-library/angular'
import {CounterComponent} from './counter.component.ts'

describe('Counter', () => {
  test('should render counter', async () => {
    await render(CounterComponent, {
      componentProperties: {counter: 5},
    })

    expect(screen.getByText('Current Count: 5'))
  })

  test('should increment the counter on click', async () => {
    await render(CounterComponent, {
      componentProperties: {counter: 5},
    })

    fireEvent.click(screen.getByText('+'))

    expect(screen.getByText('Current Count: 6'))
  })
})<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">function</span> <span class="token generic-function"><span class="token function">render</span><span class="token generic class-name"><span class="token operator">&lt;</span>ComponentType<span class="token operator">></span></span></span><span class="token punctuation">(</span>component<span class="token operator">:</span> <span class="token builtin">any</span><span class="token punctuation">,</span> renderOptions<span class="token operator">?</span><span class="token operator">:</span> RenderComponentOptions<span class="token operator">&lt;</span>ComponentType<span class="token operator">></span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token generic-function"><span class="token function">Promise</span><span class="token generic class-name"><span class="token operator">&lt;</span>RenderResult<span class="token operator">&lt;</span>ComponentType<span class="token punctuation">,</span> ComponentType<span class="token operator">>></span></span></span> <span class="token punctuation">(</span><span class="token operator">+</span><span class="token number">2</span> overloads<span class="token punctuation">)</span>
<span class="token keyword">import</span> render</code></pre>