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Update react monorepo to v19 (major)#584

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@renovate renovate bot commented Mar 29, 2022 •
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ℹ️ Note

This PR body was truncated due to platform limits.

This PR contains the following updates:

Package Change Age Confidence
@types/react (source) 17.0.91 → 19.2.14 age confidence
@types/react-dom (source) 17.0.26 → 19.2.3 age confidence
react (source) 17.0.2 → 19.2.5 age confidence
react-dom (source) 17.0.2 → 19.2.5 age confidence

Release Notes

facebook/react (react)

v19.2.5: 19.2.5 (April 8th, 2026)

Compare Source

React Server Components

v19.2.4: 19.2.4 (January 26th, 2026)

Compare Source

React Server Components

v19.2.3: 19.2.3 (December 11th, 2025)

Compare Source

React Server Components

v19.2.2: 19.2.2 (December 11th, 2025)

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React Server Components

v19.2.1: 19.2.1 (December 3rd, 2025)

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React Server Components

v19.2.0

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Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features
  • <Activity>: A new API to hide and restore the UI and internal state of its children.
  • useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
  • cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
  • React Performance tracks appear on the Performance panel’s timeline in your browser developer tools
New React DOM Features
  • Added resume APIs for partial pre-rendering with Web Streams:
  • Added resume APIs for partial pre-rendering with Node Streams:
  • Updated prerender APIs to return a postponed state that can be passed to the resume APIs.
Notable changes
  • React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
  • Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
  • Use underscore instead of : IDs generated by useId
All Changes
React
React DOM
React Server Components
React Reconciler

v19.1.6: 19.1.6 (April 8th, 2026)

Compare Source

React Server Components

v19.1.5: 19.1.5 (January 26th, 2026)

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React Server Components

v19.1.4: 19.1.4 (December 11th, 2025)

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React Server Components

v19.1.3: 19.1.3 (December 11th, 2025)

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React Server Components

v19.1.2: 19.1.2 (December 3rd, 2025)

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React Server Components

v19.1.1

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React

v19.1.0

Compare Source

Owner Stack

An Owner Stack is a string representing the components that are directly responsible for rendering a particular component. You can log Owner Stacks when debugging or use Owner Stacks to enhance error overlays or other development tools. Owner Stacks are only available in development builds. Component Stacks in production are unchanged.

  • An Owner Stack is a development-only stack trace that helps identify which components are responsible for rendering a particular component. An Owner Stack is distinct from a Component Stacks, which shows the hierarchy of components leading to an error.
  • The captureOwnerStack API is only available in development mode and returns a Owner Stack, if available. The API can be used to enhance error overlays or log component relationships when debugging. #​29923, #​32353, #​30306,
    #​32538, #​32529, #​32538
React
  • Enhanced support for Suspense boundaries to be used anywhere, including the client, server, and during hydration. #​32069, #​32163, #​32224, #​32252
  • Reduced unnecessary client rendering through improved hydration scheduling #​31751
  • Increased priority of client rendered Suspense boundaries #​31776
  • Fixed frozen fallback states by rendering unfinished Suspense boundaries on the client. #​31620
  • Reduced garbage collection pressure by improving Suspense boundary retries. #​31667
  • Fixed erroneous “Waiting for Paint” log when the passive effect phase was not delayed #​31526
  • Fixed a regression causing key warnings for flattened positional children in development mode. #​32117
  • Updated useId to use valid CSS selectors, changing format from :r123: to «r123». #​32001
  • Added a dev-only warning for null/undefined created in useEffect, useInsertionEffect, and useLayoutEffect. #​32355
  • Fixed a bug where dev-only methods were exported in production builds. React.act is no longer available in production builds. #​32200
  • Improved consistency across prod and dev to improve compatibility with Google Closure Compiler and bindings #​31808
  • Improve passive effect scheduling for consistent task yielding. #​31785
  • Fixed asserts in React Native when passChildrenWhenCloningPersistedNodes is enabled for OffscreenComponent rendering. #​32528
  • Fixed component name resolution for Portal #​32640
  • Added support for beforetoggle and toggle events on the dialog element. #​32479
React DOM
  • Fixed double warning when the href attribute is an empty string #​31783
  • Fixed an edge case where getHoistableRoot() didn’t work properly when the container was a Document #​32321
  • Removed support for using HTML comments (e.g. <!-- -->) as a DOM container. #​32250
  • Added support for <script> and <template> tags to be nested within <select> tags. #​31837
  • Fixed responsive images to be preloaded as HTML instead of headers #​32445
use-sync-external-store
  • Added exports field to package.json for use-sync-external-store to support various entrypoints. #​25231
React Server Components
  • Added unstable_prerender, a new experimental API for prerendering React Server Components on the server #​31724
  • Fixed an issue where streams would hang when receiving new chunks after a global error #​31840, #​31851
  • Fixed an issue where pending chunks were counted twice. #​31833
  • Added support for streaming in edge environments #​31852
  • Added support for sending custom error names from a server so that they are available in the client for console replaying. #​32116
  • Updated the server component wire format to remove IDs for hints and console.log because they have no return value #​31671
  • Exposed registerServerReference in client builds to handle server references in different environments. #​32534
  • Added react-server-dom-parcel package which integrates Server Components with the Parcel bundler #​31725, #​32132, #​31799, #​32294, #​31741

v19.0.5: 19.0.5 (April 8th, 2026)

Compare Source

React Server Components

v19.0.4: 19.0.4 (January 26th, 2026)

Compare Source

React Server Components

v19.0.3: 19.0.3 (December 11th, 2025)

Compare Source

React Server Components

v19.0.2: 19.0.2 (December 11th, 2025)

Compare Source

React Server Components

v19.0.1: 19.0.1 (December 3rd, 2025)

Compare Source

React Server Components

v19.0.0

Compare Source

Below is a list of all new features, APIs, deprecations, and breaking changes. Read React 19 release post and React 19 upgrade guide for more information.

Note: To help make the upgrade to React 19 easier, we’ve published a react@​18.3 release that is identical to 18.2 but adds warnings for deprecated APIs and other changes that are needed for React 19. We recommend upgrading to React 18.3.1 first to help identify any issues before upgrading to React 19.

New Features
React
  • Actions: startTransition can now accept async functions. Functions passed to startTransition are called “Actions”. A given Transition can include one or more Actions which update state in the background and update the UI with one commit. In addition to updating state, Actions can now perform side effects including async requests, and the Action will wait for the work to finish before finishing the Transition. This feature allows Transitions to include side effects like fetch() in the pending state, and provides support for error handling, and optimistic updates.
  • useActionState: is a new hook to order Actions inside of a Transition with access to the state of the action, and the pending state. It accepts a reducer that can call Actions, and the initial state used for first render. It also accepts an optional string that is used if the action is passed to a form action prop to support progressive enhancement in forms.
  • useOptimistic: is a new hook to update state while a Transition is in progress. It returns the state, and a set function that can be called inside a transition to “optimistically” update the state to expected final value immediately while the Transition completes in the background. When the transition finishes, the state is updated to the new value.
  • use: is a new API that allows reading resources in render. In React 19, use accepts a promise or Context. If provided a promise, use will suspend until a value is resolved. use can only be used in render but can be called conditionally.
  • ref as a prop: Refs can now be used as props, removing the need for forwardRef.
  • Suspense sibling pre-warming: When a component suspends, React will immediately commit the fallback of the nearest Suspense boundary, without waiting for the entire sibling tree to render. After the fallback commits, React will schedule another render for the suspended siblings to “pre-warm” lazy requests.
React DOM Client
  • <form> action prop: Form Actions allow you to manage forms automatically and integrate with useFormStatus. When a <form> action succeeds, React will automatically reset the form for uncontrolled components. The form can be reset manually with the new requestFormReset API.
  • <button> and <input> formAction prop: Actions can be passed to the formAction prop to configure form submission behavior. This allows using different Actions depending on the input.
  • useFormStatus: is a new hook that provides the status of the parent <form> action, as if the form was a Context provider. The hook returns the values: pending, data, method, and action.
  • Support for Document Metadata: We’ve added support for rendering document metadata tags in components natively. React will automatically hoist them into the <head> section of the document.
  • Support for Stylesheets: React 19 will ensure stylesheets are inserted into the <head> on the client before revealing the content of a Suspense boundary that depends on that stylesheet.
  • Support for async scripts: Async scripts can be rendered anywhere in the component tree and React will handle ordering and deduplication.
  • Support for preloading resources: React 19 ships with preinit, preload, prefetchDNS, and preconnect APIs to optimize initial page loads by moving discovery of additional resources like fonts out of stylesheet loading. They can also be used to prefetch resources used by an anticipated navigation.
React DOM Server
  • Added prerender and prerenderToNodeStream APIs for static site generation. They are designed to work with streaming environments like Node.js Streams and Web Streams. Unlike renderToString, they wait for data to load for HTML generation.
React Server Components
  • RSC features such as directives, server components, and server functions are now stable. This means libraries that ship with Server Components can now target React 19 as a peer dependency with a react-server export condition for use in frameworks that support the Full-stack React Architecture. The underlying APIs used to implement a React Server Components bundler or framework do not follow semver and may break between minors in React 19.x. See docs for how to support React Server Components.
Deprecations
  • Deprecated: element.ref access: React 19 supports ref as a prop, so we’re deprecating element.ref in favor of element.props.ref. Accessing will result in a warning.
  • react-test-renderer: In React 19, react-test-renderer logs a deprecation warning and has switched to concurrent rendering for web usage. We recommend migrating your tests to @​testing-library/react or @​testing-library/react-native
Breaking Changes

React 19 brings in a number of breaking changes, including the removals of long-deprecated APIs. We recommend first upgrading to 18.3.1, where we've added additional deprecation warnings. Check out the upgrade guide for more details and guidance on codemodding.

React
  • New JSX Transform is now required: We introduced a new JSX transform in 2020 to improve bundle size and use JSX without importing React. In React 19, we’re adding additional improvements like using ref as a prop and JSX speed improvements that require the new transform.
  • Errors in render are not re-thrown: Errors that are not caught by an Error Boundary are now reported to window.reportError. Errors that are caught by an Error Boundary are reported to console.error. We’ve introduced onUncaughtError and onCaughtError methods to createRoot and hydrateRoot to customize this error handling.
  • Removed: propTypes: Using propTypes will now be silently ignored. If required, we recommend migrating to TypeScript or another type-checking solution.
  • Removed: defaultProps for functions: ES6 default parameters can be used in place. Class components continue to support defaultProps since there is no ES6 alternative.
  • Removed: contextTypes and getChildContext: Legacy Context for class components has been removed in favor of the contextType API.
  • Removed: string refs: Any usage of string refs need to be migrated to ref callbacks.
  • Removed: Module pattern factories: A rarely used pattern that can be migrated to regular functions.
  • Removed: React.createFactory: Now that JSX is broadly supported, all createFactory usage can be migrated to JSX components.
  • Removed: react-test-renderer/shallow: This has been a re-export of react-shallow-renderer since React 18. If needed, you can continue to use the third-party package directly. We recommend using @​testing-library/react or @​testing-library/react-native instead.
React DOM
  • Removed: react-dom/test-utils: We’ve moved act from react-dom/test-utils to react. All other utilities have been removed.
  • Removed: ReactDOM.render, ReactDOM.hydrate: These have been removed in favor of the concurrent equivalents: ReactDOM.createRoot and ReactDOM.hydrateRoot.
  • Removed: unmountComponentAtNode: Removed in favor of root.unmount().
  • Removed: ReactDOM.findDOMNode: You can replace ReactDOM.findDOMNode with DOM Refs.
Notable Changes
React
  • <Context> as a provider: You can now render <Context> as a provider instead of <Context.Provider>.
  • Cleanup functions for refs: When the component unmounts, React will call the cleanup function returned from the ref callback.
  • useDeferredValue initial value argument: When provided, useDeferredValue will return the initial value for the initial render of a component, then schedule a re-render in the background with the deferredValue returned.
  • Support for Custom Elements: React 19 now passes all tests on Custom Elements Everywhere.
  • StrictMode changes: useMemo and useCallback will now reuse the memoized results from the first render, during the second render. Additionally, StrictMode will now double-invoke ref callback functions on initial mount.
  • UMD builds removed: To load React 19 with a script tag, we recommend using an ESM-based CDN such as esm.sh.
React DOM
  • Diffs for hydration errors: In the case of a mismatch, React 19 logs a single error with a diff of the mismatched content.
  • Compatibility with third-party scripts and extensions: React will now force a client re-render to fix up any mismatched content caused by elements inserted by third-party JS.
TypeScript Changes

The most common changes can be codemodded with npx types-react-codemod@latest preset-19 ./path-to-your-react-ts-files.

  • Removed deprecated TypeScript types:
    • ReactChild (replacement: React.ReactElement | number | string)
    • ReactFragment (replacement: Iterable<React.ReactNode>)
    • ReactNodeArray (replacement: ReadonlyArray<React.ReactNode>)
    • ReactText (replacement: number | string)
    • VoidFunctionComponent (replacement: FunctionComponent)
    • VFC (replacement: FC)
    • Moved to prop-types: Requireable, ValidationMap, Validator, WeakValidationMap
    • Moved to create-react-class: ClassicComponentClass, ClassicComponent, ClassicElement, ComponentSpec, Mixin, ReactChildren, ReactHTML, ReactSVG, SFCFactory
  • Disallow implicit return in refs: refs can now accept cleanup functions. When you return something else, we can’t tell if you intentionally returned something not meant to clean up or returned the wrong value. Implicit returns of anything but functions will now error.
  • Require initial argument to useRef: The initial argument is now required to match useState, createContext etc
  • Refs are mutable by default: Ref objects returned from useRef() are now always mutable instead of sometimes being immutable. This feature was too confusing for users and conflicted with legit cases where refs were managed by React and manually written to.
  • Strict ReactElement typing: The props of React elements now default to unknown instead of any if the element is typed as ReactElement
  • JSX namespace in TypeScript: The global JSX namespace is removed to improve interoperability with other libraries using JSX. Instead, the JSX namespace is available from the React package: import { JSX } from 'react'
  • Better useReducer typings: Most useReducer usage should not require explicit type arguments.
    For example, 
    -useReducer<React.Reducer<State, Action>>(reducer)
+useReducer(reducer)
    or 
    -useReducer<React.Reducer<State, Action>>(reducer)
+useReducer<State, Action>(reducer)
All Changes
React
React DOM

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coderabbitai bot commented Jan 25, 2024 •
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Walkthrough

The project has been updated to utilize the latest major versions of React and React DOM, moving from version 17.0.2 to 19.1.0. This update includes corresponding modifications to their type definitions, enhancing type safety and allowing access to new features introduced in these versions. These changes ensure better compatibility with the current React ecosystem.

Changes

Files Change Summary
package.json Updated React and React DOM from 17.0.2 to 19.1.0; upgraded type definitions to @types/react and @types/react-dom both at 19.1.2.

Poem

🐰 In the garden of code, we leap with delight,
Upgrading our friends, making everything bright.
With React so new, oh what joy we find,
A hop and a skip, leaving old bugs behind!
So here’s to the changes, let’s cheer and play,
For a smoother, faster, and brighter day! ✨

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Commits

Files that changed from the base of the PR and between 76188fe and d2d9443.

Files ignored due to path filters (1)
  • yarn.lock is excluded by !**/yarn.lock, !**/*.lock
Files selected for processing (1)
  • package.json (2 hunks)
Additional comments not posted (4)
package.json (4)

35-35: Check type definitions for React.

The @types/react package has been updated to version 18.3.4. Ensure that the type definitions align with the updated React version and that there are no type-related issues in the codebase.

Run the following script to identify potential type issues with React 18:

26-26: Verify React DOM updates.

The react-dom library has been updated to version 18.3.1. Ensure that the project utilizes the new APIs like createRoot and hydrateRoot for rendering.

Run the following script to check for correct usage of React DOM 18 APIs:

36-36: Ensure compatibility with React DOM type definitions.

The @types/react-dom package has been updated to version 18.3.0. Verify that the type definitions are correctly used in the codebase and align with the updated React DOM version.

Run the following script to check for type issues related to React DOM 18:

25-25: Ensure compatibility with React 18.

The react library has been updated to version 18.3.1. Verify that the codebase is compatible with React 18 features and breaking changes, such as the new concurrent rendering APIs.

Run the following script to identify potential issues with React 18 usage:

Verification successful

No deprecated React lifecycle methods found; new React 18 APIs not detected.

The codebase does not contain deprecated lifecycle methods, which is good. However, there is no evidence of new React 18 API usage. Ensure that any new React 18 features are implemented correctly if they are being used.

Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Check for usage of deprecated or changed APIs in React 18.

# Test: Search for deprecated lifecycle methods. Expect: No occurrences.
rg --type js --type jsx --type ts --type tsx 'componentWillMount|componentWillReceiveProps|componentWillUpdate'

# Test: Search for new React 18 APIs. Expect: Correct usage.
rg --type js --type jsx --type ts --type tsx 'createRoot|hydrateRoot|useId|startTransition|useTransition|useDeferredValue'

Length of output: 294

Script:

#!/bin/bash
# Description: Check for usage of deprecated or changed APIs in React 18.

# Test: Search for deprecated lifecycle methods. Expect: No occurrences.
rg --type js --type ts 'componentWillMount|componentWillReceiveProps|componentWillUpdate'

# Test: Search for new React 18 APIs. Expect: Correct usage.
rg --type js --type ts 'createRoot|hydrateRoot|useId|startTransition|useTransition|useDeferredValue'

Length of output: 194

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Outside diff range, codebase verification and nitpick comments (1)
package.json (1)

25-25: Update ReactDOM.render usage for React 18 compatibility.

The codebase uses ReactDOM.render in the following files, which should be updated to use createRoot from react-dom/client for compatibility with React 18:

  • src/options_page.tsx
  • src/content_script.tsx

Please update these instances to ensure compatibility with React 18.

Analysis chain

Approve the React version update.

The update from React 17 to 18 introduces significant new features and improvements. Ensure compatibility with existing code and leverage new features like useId, startTransition, and others.

The version update is approved.

Run the following script to verify compatibility with existing code:

Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Verify compatibility with existing code.

# Test: Search for deprecated React 17 features. Expect: No occurrences.
rg --type json -A 5 $'React 17 deprecated features'

Length of output: 52

Script:

#!/bin/bash
# Description: Search for deprecated React 17 features or breaking changes in JavaScript or TypeScript files.

# Search for deprecated lifecycle methods that might be used in the codebase.
rg --type js --type ts -A 5 'componentWillMount|componentWillReceiveProps|componentWillUpdate'

# Search for any usage of ReactDOM.render, which has changed in React 18.
rg --type js --type ts -A 5 'ReactDOM\.render'

Length of output: 361

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Commits

Files that changed from the base of the PR and between d2d9443 and 4d9cb00.

Files ignored due to path filters (1)
  • yarn.lock is excluded by !**/yarn.lock, !**/*.lock
Files selected for processing (1)
  • package.json (2 hunks)
Additional comments not posted (3)
package.json (3)

35-35: Approve the update for @types/react.

Updating the type definitions to match the React version ensures type safety and access to typings for new features in React 18.

The version update is approved.

36-36: Approve the update for @types/react-dom.

The update in type definitions for React DOM to version 18.3.0 is essential for ensuring compatibility with the new APIs and features of React DOM 18.

The version update is approved.

26-26: Approve the React DOM version update.

The update to React DOM 18.3.1 is necessary to utilize the full capabilities of React 18, including new rendering and hydration APIs.

The version update is approved.

Run the following script to verify compatibility with existing code:

Verification successful

No direct compatibility issues found with ReactDOM.render or ReactDOM.hydrate.

The codebase does not appear to use ReactDOM.render or ReactDOM.hydrate, which are known to have changes in React 18. However, consider manual verification for other potential compatibility issues with React DOM 18.3.1.

Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Verify compatibility with existing code.

# Test: Search for deprecated React DOM 17 features. Expect: No occurrences.
rg --type json -A 5 $'React DOM 17 deprecated features'

Length of output: 56

Script:

#!/bin/bash
# Description: Search for usage of React DOM APIs that might have changed in version 18.

# Search for usage of ReactDOM.render, which has changed in React 18.
rg --type js --type jsx 'ReactDOM\.render'

# Search for usage of ReactDOM.hydrate, which has changed in React 18.
rg --type js --type jsx 'ReactDOM\.hydrate'

Length of output: 146

Script:

#!/bin/bash
# Description: Search for usage of React DOM APIs that might have changed in version 18.

# Search for usage of ReactDOM.render, which has changed in React 18.
rg --type js 'ReactDOM\.render'

# Search for usage of ReactDOM.hydrate, which has changed in React 18.
rg --type js 'ReactDOM\.hydrate'

Length of output: 68

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