Move conditional useInsertionEffect declarations into separate package

.changeset/blue-pears-explode.md

@@ -0,0 +1,8 @@
+---
+'@emotion/react': patch
+'@emotion/styled': patch
+---
+
+Externalized code referencing `React.useInsertionEffect` to a separate `@emotion/use-insertion-effect-with-fallbacks` package. This package should be used in your defined externals if you bundle Emotion for whatever reason. It references `useInsertionEffect` in a very specific way that allows us to use it conditionally. However, if the code consuming Emotion is bundled as a library with Emotion in it then some bundlers might change the way in which we reference `useInsertionEffect` and that might create problems for bundlers used to consume the said library code. By externalizing this new package you can still bundle Emotion if you want to without running into this problem as you won't "destroy" the carefully crafted reference to `useInsertionEffect` in the process.
+
+Note that we don't recommend bundling Emotion. You should have very specific reasons to do so.

.changeset/lemon-emus-applaud.md

@@ -0,0 +1,5 @@
+---
+'@emotion/use-insertion-effect-with-fallbacks': major
+---
+
+A wrapper package that uses `useInsertionEffect` or a specific fallback for it. It comes with two exports: `useInsertionEffectAlwaysWithSyncFallback` and `useInsertionEffectWithLayoutFallback`.

packages/react/package.json

@@ -66,6 +66,7 @@
     "@emotion/babel-plugin": "^11.10.0",
     "@emotion/cache": "^11.10.0",
     "@emotion/serialize": "^1.1.0",
+    "@emotion/use-insertion-effect-with-fallbacks": "^0.0.0",
     "@emotion/utils": "^1.2.0",
     "@emotion/weak-memoize": "^0.3.0",
     "hoist-non-react-statics": "^3.3.1"

packages/react/src/class-names.js

@@ -8,7 +8,7 @@ import {
 import { serializeStyles } from '@emotion/serialize'
 import { withEmotionCache } from './context'
 import { ThemeContext } from './theming'
-import useInsertionEffectMaybe from './useInsertionEffectMaybe'
+import { useInsertionEffectAlwaysWithSyncFallback } from '@emotion/use-insertion-effect-with-fallbacks'
 import { isBrowser } from './utils'
 
 type ClassNameArg =
@@ -94,7 +94,7 @@ type Props = {
 }
 
 const Insertion = ({ cache, serializedArr }) => {
-  let rules = useInsertionEffectMaybe(() => {
+  let rules = useInsertionEffectAlwaysWithSyncFallback(() => {
     let rules = ''
     for (let i = 0; i < serializedArr.length; i++) {
       let res = insertStyles(cache, serializedArr[i], false)

packages/react/src/emotion-element.js

@@ -10,7 +10,7 @@ import {
 import { hasOwnProperty, isBrowser } from './utils'
 import { serializeStyles } from '@emotion/serialize'
 import { getLabelFromStackTrace } from './get-label-from-stack-trace'
-import useInsertionEffectMaybe from './useInsertionEffectMaybe'
+import { useInsertionEffectAlwaysWithSyncFallback } from '@emotion/use-insertion-effect-with-fallbacks'
 
 let typePropName = '__EMOTION_TYPE_PLEASE_DO_NOT_USE__'
 
@@ -57,7 +57,7 @@ export const createEmotionProps = (type: React.ElementType, props: Object) => {
 const Insertion = ({ cache, serialized, isStringTag }) => {
   registerStyles(cache, serialized, isStringTag)
 
-  const rules = useInsertionEffectMaybe(() =>
+  const rules = useInsertionEffectAlwaysWithSyncFallback(() =>
     insertStyles(cache, serialized, isStringTag)
   )
 

packages/react/src/global.js

@@ -4,6 +4,7 @@ import { withEmotionCache } from './context'
 import { ThemeContext } from './theming'
 import { insertStyles } from '@emotion/utils'
 import { isBrowser } from './utils'
+import { useInsertionEffectWithLayoutFallback } from '@emotion/use-insertion-effect-with-fallbacks'
 
 import { serializeStyles } from '@emotion/serialize'
 
@@ -13,10 +14,6 @@ type GlobalProps = {
   +styles: Styles | (Object => Styles)
 }
 
-const useInsertionEffect = React['useInsertion' + 'Effect']
-  ? React['useInsertion' + 'Effect']
-  : React.useLayoutEffect
-
 let warnedAboutCssPropForGlobal = false
 
 // maintain place over rerenders.
@@ -87,7 +84,7 @@ export let Global: React.AbstractComponent<GlobalProps> =
 
     let sheetRef = React.useRef()
 
-    useInsertionEffect(() => {
+    useInsertionEffectWithLayoutFallback(() => {
       const key = `${cache.key}-global`
 
       // use case of https://github.com/emotion-js/emotion/issues/2675
@@ -117,7 +114,7 @@ export let Global: React.AbstractComponent<GlobalProps> =
       }
     }, [cache])
 
-    useInsertionEffect(() => {
+    useInsertionEffectWithLayoutFallback(() => {
       let sheetRefCurrent = (sheetRef.current: any)
       let [sheet, rehydrating] = sheetRefCurrent
       if (rehydrating) {

packages/styled/package.json

@@ -15,6 +15,7 @@
     "@emotion/babel-plugin": "^11.10.0",
     "@emotion/is-prop-valid": "^1.2.0",
     "@emotion/serialize": "^1.1.0",
+    "@emotion/use-insertion-effect-with-fallbacks": "^0.0.0",
     "@emotion/utils": "^1.2.0"
   },
   "peerDependencies": {

packages/styled/src/base.js

@@ -15,7 +15,7 @@ import {
   registerStyles
 } from '@emotion/utils'
 import { serializeStyles } from '@emotion/serialize'
-import useInsertionEffectMaybe from './useInsertionEffectMaybe'
+import { useInsertionEffectAlwaysWithSyncFallback } from '@emotion/use-insertion-effect-with-fallbacks'
 
 const ILLEGAL_ESCAPE_SEQUENCE_ERROR = `You have illegal escape sequence in your template literal, most likely inside content's property value.
 Because you write your CSS inside a JavaScript string you actually have to do double escaping, so for example "content: '\\00d7';" should become "content: '\\\\00d7';".
@@ -27,7 +27,7 @@ let isBrowser = typeof document !== 'undefined'
 const Insertion = ({ cache, serialized, isStringTag }) => {
   registerStyles(cache, serialized, isStringTag)
 
-  const rules = useInsertionEffectMaybe(() =>
+  const rules = useInsertionEffectAlwaysWithSyncFallback(() =>
     insertStyles(cache, serialized, isStringTag)
   )
 

packages/use-insertion-effect-with-fallbacks/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) Emotion team and other contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

packages/use-insertion-effect-with-fallbacks/README.md

@@ -0,0 +1 @@
+# @emotion/use-insertion-effect-with-fallbacks

packages/use-insertion-effect-with-fallbacks/package.json

@@ -0,0 +1,44 @@
+{
+  "name": "@emotion/use-insertion-effect-with-fallbacks",
+  "version": "0.0.0",
+  "description": "A wrapper package that uses `useInsertionEffect` or a fallback for it",
+  "main": "dist/emotion-use-insertion-effect-with-fallbacks.cjs.js",
+  "module": "dist/emotion-use-insertion-effect-with-fallbacks.esm.js",
+  "browser": {
+    "./dist/emotion-use-insertion-effect-with-fallbacks.esm.js": "./dist/emotion-use-insertion-effect-with-fallbacks.browser.esm.js"
+  },
+  "license": "MIT",
+  "repository": "https://github.com/emotion-js/emotion/tree/main/packages/use-insertion-effect-with-fallbacks",
+  "publishConfig": {
+    "access": "public"
+  },
+  "files": [
+    "src",
+    "dist"
+  ],
+  "peerDependencies": {
+    "react": ">=16.8.0"
+  },
+  "devDependencies": {
+    "react": "16.14.0"
+  },
+  "exports": {
+    ".": {
+      "module": {
+        "worker": "./dist/emotion-use-insertion-effect-with-fallbacks.worker.esm.js",
+        "browser": "./dist/emotion-use-insertion-effect-with-fallbacks.browser.esm.js",
+        "default": "./dist/emotion-use-insertion-effect-with-fallbacks.esm.js"
+      },
+      "default": "./dist/emotion-use-insertion-effect-with-fallbacks.cjs.js"
+    },
+    "./package.json": "./package.json"
+  },
+  "preconstruct": {
+    "exports": {
+      "envConditions": [
+        "browser",
+        "worker"
+      ]
+    }
+  }
+}

packages/use-insertion-effect-with-fallbacks/src/index.js

@@ -0,0 +1,16 @@
+import * as React from 'react'
+
+const isBrowser = typeof document !== 'undefined'
+
+const syncFallback = create => create()
+
+const useInsertionEffect = React['useInsertion' + 'Effect']
+  ? React['useInsertion' + 'Effect']
+  : false
+
+export const useInsertionEffectAlwaysWithSyncFallback = !isBrowser
+  ? syncFallback
+  : useInsertionEffect || syncFallback
+
+export const useInsertionEffectWithLayoutFallback =
+  useInsertionEffect || React.useLayoutEffect

yarn.lock

@@ -2584,6 +2584,7 @@ __metadata:
     "@emotion/serialize": ^1.1.0
     "@emotion/server": 11.10.0
     "@emotion/styled": 11.10.0
+    "@emotion/use-insertion-effect-with-fallbacks": ^0.0.0
     "@emotion/utils": ^1.2.0
     "@emotion/weak-memoize": ^0.3.0
     hoist-non-react-statics: ^3.3.1
@@ -2658,6 +2659,7 @@ __metadata:
     "@emotion/is-prop-valid": ^1.2.0
     "@emotion/react": 11.10.0
     "@emotion/serialize": ^1.1.0
+    "@emotion/use-insertion-effect-with-fallbacks": ^0.0.0
     "@emotion/utils": ^1.2.0
     react: 16.14.0
     typescript: ^4.5.5
@@ -2679,6 +2681,16 @@ __metadata:
   languageName: unknown
   linkType: soft
 
+"@emotion/use-insertion-effect-with-fallbacks@^0.0.0, @emotion/use-insertion-effect-with-fallbacks@workspace:packages/use-insertion-effect-with-fallbacks":
+  version: 0.0.0-use.local
+  resolution: "@emotion/use-insertion-effect-with-fallbacks@workspace:packages/use-insertion-effect-with-fallbacks"
+  dependencies:
+    react: 16.14.0
+  peerDependencies:
+    react: ">=16.8.0"
+  languageName: unknown
+  linkType: soft
+
 "@emotion/utils@^1.2.0, @emotion/utils@workspace:packages/utils":
   version: 0.0.0-use.local
   resolution: "@emotion/utils@workspace:packages/utils"