Components: update snackbar to use framer motion instead of react spring

.eslintrc.js

@@ -70,6 +70,11 @@ module.exports = {
 			'error',
 			{
 				paths: [
+					{
+						name: 'framer-motion',
+						message:
+							'Please use the Framer Motion API through `@wordpress/components` instead.',
+					},
 					{
 						name: 'lodash',
 						importNames: [ 'memoize' ],

packages/components/package.json

@@ -52,6 +52,7 @@
 		"classnames": "^2.3.1",
 		"dom-scroll-into-view": "^1.2.1",
 		"downshift": "^6.0.15",
+		"framer-motion": "^4.1.17",
 		"gradient-parser": "^0.1.5",
 		"highlight-words-core": "^1.2.2",
 		"lodash": "^4.17.21",
@@ -60,7 +61,6 @@
 		"re-resizable": "^6.4.0",
 		"react-dates": "^17.1.1",
 		"react-resize-aware": "^3.1.0",
-		"react-spring": "^8.0.20",
 		"react-use-gesture": "^9.0.0",
 		"reakit": "^1.3.8",
 		"rememo": "^3.0.0",

packages/components/src/animation/index.js

@@ -0,0 +1,14 @@
+/**
+ * Framer Motion is used to create animated, interactive interfaces. The package is roughly ~30kb so
+ * this should ideally be loaded once across all Gutenberg packages. To give ourselves more flexibility
+ * in trying animation options, we avoid making this public API.
+ *
+ * @see https://www.framer.com/docs/animation/
+ */
+
+// eslint-disable-next-line no-restricted-imports
+export {
+	motion as __unstableMotion,
+	AnimatePresence as __unstableAnimatePresence,
+	AnimateSharedLayout as __unstableAnimateSharedLayout,
+} from 'framer-motion';

packages/components/src/index.js

@@ -16,6 +16,11 @@ export {
 	default as Animate,
 	getAnimateClassName as __unstableGetAnimateClassName,
 } from './animate';
+export {
+	__unstableMotion,
+	__unstableAnimatePresence,
+	__unstableAnimateSharedLayout,
+} from './animation';
 export { default as AnglePickerControl } from './angle-picker-control';
 export {
 	default as Autocomplete,

packages/components/src/snackbar/list.js

@@ -3,18 +3,46 @@
  */
 import classnames from 'classnames';
 import { omit, noop } from 'lodash';
-import { useTransition, animated } from 'react-spring/web.cjs';
 
 /**
  * WordPress dependencies
  */
 import { useReducedMotion } from '@wordpress/compose';
-import { useState } from '@wordpress/element';
 
 /**
  * Internal dependencies
  */
 import Snackbar from './';
+import {
+	__unstableMotion as motion,
+	__unstableAnimatePresence as AnimatePresence,
+} from '../animation';
+
+const SNACKBAR_VARIANTS = {
+	init: {
+		height: 0,
+		opacity: 0,
+	},
+	open: {
+		height: 'auto',
+		opacity: 1,
+		transition: {
+			height: { stiffness: 1000, velocity: -100 },
+		},
+	},
+	exit: {
+		opacity: 0,
+		transition: {
+			duration: 0.5,
+		},
+	},
+};
+
+const SNACKBAR_REDUCE_MOTION_VARIANTS = {
+	init: false,
+	open: false,
+	exit: false,
+};
 
 /**
  * Renders a list of notices.
@@ -29,42 +57,38 @@ import Snackbar from './';
  */
 function SnackbarList( { notices, className, children, onRemove = noop } ) {
 	const isReducedMotion = useReducedMotion();
-	const [ refMap ] = useState( () => new WeakMap() );
-	const transitions = useTransition( notices, ( notice ) => notice.id, {
-		from: { opacity: 0, height: 0 },
-		enter: ( item ) => async ( next ) =>
-			await next( {
-				opacity: 1,
-				height: refMap.get( item ).offsetHeight,
-			} ),
-		leave: () => async ( next ) => {
-			await next( { opacity: 0 } );
-			await next( { height: 0 } );
-		},
-		immediate: isReducedMotion,
-	} );
-
 	className = classnames( 'components-snackbar-list', className );
 	const removeNotice = ( notice ) => () => onRemove( notice.id );
-
 	return (
 		<div className={ className }>
 			{ children }
-			{ transitions.map( ( { item: notice, key, props: style } ) => (
-				<animated.div key={ key } style={ style }>
-					<div
-						className="components-snackbar-list__notice-container"
-						ref={ ( ref ) => ref && refMap.set( notice, ref ) }
-					>
-						<Snackbar
-							{ ...omit( notice, [ 'content' ] ) }
-							onRemove={ removeNotice( notice ) }
+			<AnimatePresence>
+				{ notices.map( ( notice ) => {
+					return (
+						<motion.div
+							layout={ ! isReducedMotion } //see https://www.framer.com/docs/animation/#layout-animations
+							initial={ 'init' }
+							animate={ 'open' }
+							exit={ 'exit' }
+							key={ notice.id }
+							variants={
+								isReducedMotion
+									? SNACKBAR_REDUCE_MOTION_VARIANTS
+									: SNACKBAR_VARIANTS
+							}
 						>
-							{ notice.content }
-						</Snackbar>
-					</div>
-				</animated.div>
-			) ) }
+							<div className="components-snackbar-list__notice-container">
+								<Snackbar
+									{ ...omit( notice, [ 'content' ] ) }
+									onRemove={ removeNotice( notice ) }
+								>
+									{ notice.content }
+								</Snackbar>
+							</div>
+						</motion.div>
+					);
+				} ) }
+			</AnimatePresence>
 		</div>
 	);
 }

packages/edit-post/package.json

@@ -53,7 +53,6 @@
 		"@wordpress/viewport": "file:../viewport",
 		"@wordpress/warning": "file:../warning",
 		"classnames": "^2.3.1",
-		"framer-motion": "^4.1.3",
 		"lodash": "^4.17.21",
 		"memize": "^1.1.0",
 		"rememo": "^3.0.0",

packages/edit-post/src/components/visual-editor/index.js

@@ -2,7 +2,6 @@
  * External dependencies
  */
 import classnames from 'classnames';
-import { motion } from 'framer-motion';
 
 /**
  * WordPress dependencies
@@ -32,7 +31,7 @@ import {
 	__experimentalUseNoRecursiveRenders as useNoRecursiveRenders,
 } from '@wordpress/block-editor';
 import { useRef, useMemo } from '@wordpress/element';
-import { Button } from '@wordpress/components';
+import { Button, __unstableMotion as motion } from '@wordpress/components';
 import { useSelect, useDispatch } from '@wordpress/data';
 import { useMergeRefs } from '@wordpress/compose';
 import { arrowLeft } from '@wordpress/icons';