Function createConcurrentRoot

src/pure.js:92–139

(
  container,
  {
    hydrate,
    onCaughtError,
    onRecoverableError,
    ui,
    wrapper: WrapperComponent,
    reactStrictMode,
  },
)

}

function createConcurrentRoot(
  container,
  {
    hydrate,
    onCaughtError,
    onRecoverableError,
    ui,
    wrapper: WrapperComponent,
    reactStrictMode,
  },
) {
  let root
  if (hydrate) {
    act(() => {
      root = ReactDOMClient.hydrateRoot(
        container,
        strictModeIfNeeded(
          wrapUiIfNeeded(ui, WrapperComponent),
          reactStrictMode,
        ),
        {onCaughtError, onRecoverableError},
      )
    })
  } else {
    root = ReactDOMClient.createRoot(container, {
      onCaughtError,
      onRecoverableError,
    })
  }

  return {
    hydrate() {
      /* istanbul ignore if */
      if (!hydrate) {
        throw new Error(
          'Attempted to hydrate a non-hydrateable root. This is a bug in `@testing-library/react`.',
        )
      }
      // Nothing to do since hydration happens when creating the root object.
    },
    render(element) {
      root.render(element)
    },
    unmount() {
      root.unmount()
    },
  }
}

function createLegacyRoot(container) {
  return {