diff --git a/packages/react-dom/src/__tests__/ReactDOMServerIntegrationHooks-test.js b/packages/react-dom/src/__tests__/ReactDOMServerIntegrationHooks-test.js index 7dfcb4fc77a76..813c0fe1e7ad1 100644 --- a/packages/react-dom/src/__tests__/ReactDOMServerIntegrationHooks-test.js +++ b/packages/react-dom/src/__tests__/ReactDOMServerIntegrationHooks-test.js @@ -867,6 +867,44 @@ describe('ReactDOMServerHooks', () => { }); }); + it('renders successfully after a component using hooks throws an error', () => { + function ThrowingComponent() { + const [value, dispatch] = useReducer((state, action) => { + return state + 1; + }, 0); + + // throw an error if the count gets too high during the re-render phase + if (value >= 3) { + throw new Error('Error from ThrowingComponent'); + } else { + // dispatch to trigger a re-render of the component + dispatch(); + } + + return
{value}
; + } + + function NonThrowingComponent() { + const [count] = useState(0); + return
{count}
; + } + + // First, render a component that will throw an error during a re-render triggered + // by a dispatch call. + expect(() => ReactDOMServer.renderToString()).toThrow( + 'Error from ThrowingComponent', + ); + + // Next, assert that we can render a function component using hooks immediately + // after an error occurred, which indictates the internal hooks state has been + // reset. + const container = document.createElement('div'); + container.innerHTML = ReactDOMServer.renderToString( + , + ); + expect(container.children[0].textContent).toEqual('0'); + }); + if (__EXPERIMENTAL__) { describe('useOpaqueIdentifier', () => { it('generates unique ids for server string render', async () => { diff --git a/packages/react-dom/src/server/ReactPartialRenderer.js b/packages/react-dom/src/server/ReactPartialRenderer.js index 63693ed1b5930..8e05eba864c81 100644 --- a/packages/react-dom/src/server/ReactPartialRenderer.js +++ b/packages/react-dom/src/server/ReactPartialRenderer.js @@ -60,6 +60,7 @@ import escapeTextForBrowser from './escapeTextForBrowser'; import { prepareToUseHooks, finishHooks, + resetHooksState, Dispatcher, currentPartialRenderer, setCurrentPartialRenderer, @@ -955,6 +956,7 @@ class ReactDOMServerRenderer { } finally { ReactCurrentDispatcher.current = prevDispatcher; setCurrentPartialRenderer(prevPartialRenderer); + resetHooksState(); } } diff --git a/packages/react-dom/src/server/ReactPartialRendererHooks.js b/packages/react-dom/src/server/ReactPartialRendererHooks.js index e2180a47542a1..a6050d91c63e8 100644 --- a/packages/react-dom/src/server/ReactPartialRendererHooks.js +++ b/packages/react-dom/src/server/ReactPartialRendererHooks.js @@ -202,24 +202,22 @@ export function finishHooks( children = Component(props, refOrContext); } + resetHooksState(); + return children; +} + +// Reset the internal hooks state if an error occurs while rendering a component +export function resetHooksState(): void { + if (__DEV__) { + isInHookUserCodeInDev = false; + } + currentlyRenderingComponent = null; + didScheduleRenderPhaseUpdate = false; firstWorkInProgressHook = null; numberOfReRenders = 0; renderPhaseUpdates = null; workInProgressHook = null; - if (__DEV__) { - isInHookUserCodeInDev = false; - } - - // These were reset above - // currentlyRenderingComponent = null; - // didScheduleRenderPhaseUpdate = false; - // firstWorkInProgressHook = null; - // numberOfReRenders = 0; - // renderPhaseUpdates = null; - // workInProgressHook = null; - - return children; } function readContext(