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Do not try to batch updates in React >= 18 #5460

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Jun 21, 2023
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5 changes: 5 additions & 0 deletions .changeset/nice-shirts-flash.md
Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
'slate-react': patch
---

Do not attempt to batch updates manually in React >= 18
4 changes: 2 additions & 2 deletions packages/slate-react/src/components/slate.tsx
Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@ import {
} from '../hooks/use-slate-selector'
import { EditorContext } from '../hooks/use-slate-static'
import { ReactEditor } from '../plugin/react-editor'
import { IS_REACT_VERSION_17_OR_ABOVE } from '../utils/environment'
import { REACT_MAJOR_VERSION } from '../utils/environment'
import { EDITOR_TO_ON_CHANGE } from '../utils/weak-maps'

/**
Expand Down Expand Up @@ -78,7 +78,7 @@ export const Slate = (props: {

useIsomorphicLayoutEffect(() => {
const fn = () => setIsFocused(ReactEditor.isFocused(editor))
if (IS_REACT_VERSION_17_OR_ABOVE) {
if (REACT_MAJOR_VERSION >= 17) {
// In React >= 17 onFocus and onBlur listen to the focusin and focusout events during the bubbling phase.
// Therefore in order for <Editable />'s handlers to run first, which is necessary for ReactEditor.isFocused(editor)
// to return the correct value, we have to listen to the focusin and focusout events without useCapture here.
Expand Down
15 changes: 11 additions & 4 deletions packages/slate-react/src/plugin/with-react.ts
Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,7 @@ import {
NODE_TO_KEY,
} from '../utils/weak-maps'
import { ReactEditor } from './react-editor'
import { REACT_MAJOR_VERSION } from '../utils/environment'

/**
* `withReact` adds React and DOM specific behaviors to the editor.
Expand Down Expand Up @@ -324,11 +325,17 @@ export const withReact = <T extends BaseEditor>(
}

e.onChange = options => {
// COMPAT: React doesn't batch `setState` hook calls, which means that the
// children and selection can get out of sync for one render pass. So we
// have to use this unstable API to ensure it batches them. (2019/12/03)
// COMPAT: React < 18 doesn't batch `setState` hook calls, which means
// that the children and selection can get out of sync for one render
// pass. So we have to use this unstable API to ensure it batches them.
// (2019/12/03)
// https://github.com/facebook/react/issues/14259#issuecomment-439702367
ReactDOM.unstable_batchedUpdates(() => {
const maybeBatchUpdates =
REACT_MAJOR_VERSION < 18
? ReactDOM.unstable_batchedUpdates
: (callback: () => void) => callback()

maybeBatchUpdates(() => {
const onContextChange = EDITOR_TO_ON_CHANGE.get(e)

if (onContextChange) {
Expand Down
3 changes: 1 addition & 2 deletions packages/slate-react/src/utils/environment.ts
Original file line number Diff line number Diff line change
@@ -1,7 +1,6 @@
import React from 'react'

export const IS_REACT_VERSION_17_OR_ABOVE =
parseInt(React.version.split('.')[0], 10) >= 17
export const REACT_MAJOR_VERSION = parseInt(React.version.split('.')[0], 10)

export const IS_IOS =
typeof navigator !== 'undefined' &&
Expand Down