[material-ui][Accordion] Deprecate *Props props and classes for v6

docs/data/material/components/accordion/AccordionTransition.js

@@ -18,8 +18,8 @@ export default function AccordionTransition() {
       <Accordion
         expanded={expanded}
         onChange={handleExpansion}
-        TransitionComponent={Fade}
-        TransitionProps={{ timeout: 200 }}
+        slots={{ transition: Fade }}
+        slotProps={{ transition: { timeout: 400 } }}
         sx={{
           '& .MuiAccordion-region': { height: expanded ? 'auto' : 0 },
           '& .MuiAccordionDetails-root': { display: expanded ? 'block' : 'none' },

docs/data/material/components/accordion/AccordionTransition.tsx

@@ -1,5 +1,5 @@
 import * as React from 'react';
-import Accordion, { AccordionProps } from '@mui/material/Accordion';
+import Accordion, { AccordionSlots } from '@mui/material/Accordion';
 import AccordionSummary from '@mui/material/AccordionSummary';
 import AccordionDetails from '@mui/material/AccordionDetails';
 import Typography from '@mui/material/Typography';
@@ -18,8 +18,8 @@ export default function AccordionTransition() {
       <Accordion
         expanded={expanded}
         onChange={handleExpansion}
-        TransitionComponent={Fade as AccordionProps['TransitionComponent']}
-        TransitionProps={{ timeout: 200 }}
+        slots={{ transition: Fade as AccordionSlots['transition'] }}
+        slotProps={{ transition: { timeout: 400 } }}
         sx={{
           '& .MuiAccordion-region': { height: expanded ? 'auto' : 0 },
           '& .MuiAccordionDetails-root': { display: expanded ? 'block' : 'none' },

docs/data/material/components/accordion/accordion.md

@@ -51,7 +51,7 @@ Use the `defaultExpanded` prop on the Accordion component to have it opened by d
 
 ### Transition
 
-Use the `TransitionComponent` and `TransitionProps` props to change the Accordion's default transition.
+Use the `slots.transition` and `slotProps.transition` props to change the Accordion's default transition.
 
 {{"demo": "AccordionTransition.js", "bg": true}}
 
@@ -89,10 +89,10 @@ The demo below also shows a bit of visual customziation.
 The Accordion content is mounted by default even if it's not expanded.
 This default behavior has server-side rendering and SEO in mind.
 
-If you render the Accordion Details with a big component tree nested inside, or if you have many Accordions, you may want to change this behavior by setting `unmountOnExit` to `true` inside the `TransitionProps` prop to improve performance:
+If you render the Accordion Details with a big component tree nested inside, or if you have many Accordions, you may want to change this behavior by setting `unmountOnExit` to `true` inside the `slotProps.transition` prop to improve performance:
 
 ```jsx
-<Accordion TransitionProps={{ unmountOnExit: true }} />
+<Accordion slotProps={{ transition: { unmountOnExit: true } }} />
 ```
 
 ## Accessibility

docs/pages/material-ui/api/accordion-summary.json

@@ -28,7 +28,8 @@
       "key": "contentGutters",
       "className": "MuiAccordionSummary-contentGutters",
       "description": "Styles applied to the children wrapper element unless `disableGutters={true}`.",
-      "isGlobal": false
+      "isGlobal": false,
+      "isDeprecated": true
     },
     {
       "key": "disabled",

docs/pages/material-ui/api/accordion.json

@@ -13,6 +13,14 @@
         "describedArgs": ["event", "expanded"]
       }
     },
+    "slotProps": {
+      "type": { "name": "shape", "description": "{ transition?: func<br>&#124;&nbsp;object }" },
+      "default": "{}"
+    },
+    "slots": {
+      "type": { "name": "shape", "description": "{ transition?: elementType }" },
+      "default": "{}"
+    },
     "square": { "type": { "name": "bool" }, "default": "false" },
     "sx": {
       "type": {
@@ -21,14 +29,30 @@
       },
       "additionalInfo": { "sx": true }
     },
-    "TransitionComponent": { "type": { "name": "elementType" }, "default": "Collapse" },
-    "TransitionProps": { "type": { "name": "object" } }
+    "TransitionComponent": {
+      "type": { "name": "elementType" },
+      "deprecated": true,
+      "deprecationInfo": "Use <code>slots.transition</code> instead. This prop will be removed in v7."
+    },
+    "TransitionProps": {
+      "type": { "name": "object" },
+      "deprecated": true,
+      "deprecationInfo": "Use <code>slotProps.transition</code> instead. This prop will be removed in v7."
+    }
   },
   "name": "Accordion",
   "imports": [
     "import Accordion from '@mui/material/Accordion';",
     "import { Accordion } from '@mui/material';"
   ],
+  "slots": [
+    {
+      "name": "transition",
+      "description": "The component that renders the transition.\n[Follow this guide](/material-ui/transitions/#transitioncomponent-prop) to learn more about the requirements for this component.",
+      "default": "Collapse",
+      "class": null
+    }
+  ],
   "classes": [
     {
       "key": "disabled",

docs/translations/api-docs/accordion-summary/accordion-summary.json

@@ -19,7 +19,8 @@
     "contentGutters": {
       "description": "Styles applied to {{nodeName}} unless {{conditions}}.",
       "nodeName": "the children wrapper element",
-      "conditions": "<code>disableGutters={true}</code>"
+      "conditions": "<code>disableGutters={true}</code>",
+      "deprecationInfo": "Combine the <a href=\"/material-ui/api/accordion-summary/#AccordionSummary-classes-gutters\">.MuiAccordionSummary-gutters</a> and <a href=\"/material-ui/api/accordion-summary/#AccordionSummary-classes-content\">.MuiAccordionSummary-content</a> classes instead."
     },
     "disabled": {
       "description": "State class applied to {{nodeName}} if {{conditions}}.",

docs/translations/api-docs/accordion/accordion.json

@@ -18,6 +18,8 @@
         "expanded": "The <code>expanded</code> state of the accordion."
       }
     },
+    "slotProps": { "description": "The props used for each slot inside." },
+    "slots": { "description": "The components used for each slot inside." },
     "square": { "description": "If <code>true</code>, rounded corners are disabled." },
     "sx": {
       "description": "The system prop that allows defining system overrides as well as additional CSS styles."
@@ -56,5 +58,8 @@
       "nodeName": "the root element",
       "conditions": "<code>square={true}</code>"
     }
+  },
+  "slotDescriptions": {
+    "transition": "The component that renders the transition.\n[Follow this guide](/material-ui/transitions/#transitioncomponent-prop) to learn more about the requirements for this component."
   }
 }

packages/mui-material/src/Accordion/Accordion.d.ts

@@ -5,6 +5,31 @@ import { TransitionProps } from '../transitions/transition';
 import { AccordionClasses } from './accordionClasses';
 import { OverridableComponent, OverrideProps } from '../OverridableComponent';
 import { ExtendPaperTypeMap } from '../Paper/Paper';
+import { CreateSlotsAndSlotProps, SlotProps } from '../utils/types';
+
+export interface AccordionSlots {
+  /**
+   * The component that renders the transition.
+   * [Follow this guide](/material-ui/transitions/#transitioncomponent-prop) to learn more about the requirements for this component.
+   * @default Collapse
+   */
+  transition?: React.JSXElementConstructor<
+    TransitionProps & { children?: React.ReactElement<any, any> }
+  >;
+}
+
+export interface AccordionTransitionSlotPropsOverrides {}
+
+export type AccordionSlotsAndSlotProps = CreateSlotsAndSlotProps<
+  AccordionSlots,
+  {
+    transition: SlotProps<
+      React.ElementType<TransitionProps>,
+      AccordionTransitionSlotPropsOverrides,
+      AccordionOwnerState
+    >;
+  }
+>;
 
 export type AccordionTypeMap<
   AdditionalProps = {},
@@ -54,17 +79,18 @@ export type AccordionTypeMap<
       /**
        * The component used for the transition.
        * [Follow this guide](/material-ui/transitions/#transitioncomponent-prop) to learn more about the requirements for this component.
-       * @default Collapse
+       * @deprecated Use `slots.transition` instead. This prop will be removed in v7.
        */
       TransitionComponent?: React.JSXElementConstructor<
         TransitionProps & { children?: React.ReactElement<any, any> }
       >;
       /**
        * Props applied to the transition element.
        * By default, the element is based on this [`Transition`](http://reactcommunity.org/react-transition-group/transition/) component.
+       * @deprecated Use `slotProps.transition` instead. This prop will be removed in v7.
        */
       TransitionProps?: TransitionProps;
-    };
+    } & AccordionSlotsAndSlotProps;
     defaultComponent: RootComponent;
   },
   'onChange' | 'classes'
@@ -90,4 +116,6 @@ export type AccordionProps<
   component?: React.ElementType;
 };
 
+export interface AccordionOwnerState extends AccordionProps {}
+
 export default Accordion;

packages/mui-material/src/Accordion/Accordion.js

@@ -11,6 +11,7 @@ import Collapse from '../Collapse';
 import Paper from '../Paper';
 import AccordionContext from './AccordionContext';
 import useControlled from '../utils/useControlled';
+import useSlot from '../utils/useSlot';
 import accordionClasses, { getAccordionUtilityClass } from './accordionClasses';
 
 const useUtilityClasses = (ownerState) => {
@@ -126,8 +127,10 @@ const Accordion = React.forwardRef(function Accordion(inProps, ref) {
     expanded: expandedProp,
     onChange,
     square = false,
-    TransitionComponent = Collapse,
-    TransitionProps,
+    slots = {},
+    slotProps = {},
+    TransitionComponent: TransitionComponentProp,
+    TransitionProps: TransitionPropsProp,
     ...other
   } = props;
 
@@ -165,6 +168,20 @@ const Accordion = React.forwardRef(function Accordion(inProps, ref) {
 
   const classes = useUtilityClasses(ownerState);
 
+  const backwardCompatibleSlots = { transition: TransitionComponentProp, ...slots };
+  const backwardCompatibleSlotProps = { transition: TransitionPropsProp, ...slotProps };
+
+  const [TransitionSlot, transitionProps] = useSlot('transition', {
+    elementType: Collapse,
+    externalForwardedProps: {
+      slots: backwardCompatibleSlots,
+      slotProps: backwardCompatibleSlotProps,
+    },
+    ownerState,
+  });
+
+  delete transitionProps.ownerState;
+
   return (
     <AccordionRoot
       className={clsx(classes.root, className)}
@@ -174,7 +191,7 @@ const Accordion = React.forwardRef(function Accordion(inProps, ref) {
       {...other}
     >
       <AccordionContext.Provider value={contextValue}>{summary}</AccordionContext.Provider>
-      <TransitionComponent in={expanded} timeout="auto" {...TransitionProps}>
+      <TransitionSlot in={expanded} timeout="auto" {...transitionProps}>
         <div
           aria-labelledby={summary.props.id}
           id={summary.props['aria-controls']}
@@ -183,7 +200,7 @@ const Accordion = React.forwardRef(function Accordion(inProps, ref) {
         >
           {children}
         </div>
-      </TransitionComponent>
+      </TransitionSlot>
     </AccordionRoot>
   );
 });
@@ -246,6 +263,20 @@ Accordion.propTypes /* remove-proptypes */ = {
    * @param {boolean} expanded The `expanded` state of the accordion.
    */
   onChange: PropTypes.func,
+  /**
+   * The props used for each slot inside.
+   * @default {}
+   */
+  slotProps: PropTypes.shape({
+    transition: PropTypes.oneOfType([PropTypes.func, PropTypes.object]),
+  }),
+  /**
+   * The components used for each slot inside.
+   * @default {}
+   */
+  slots: PropTypes.shape({
+    transition: PropTypes.elementType,
+  }),
   /**
    * If `true`, rounded corners are disabled.
    * @default false
@@ -262,12 +293,13 @@ Accordion.propTypes /* remove-proptypes */ = {
   /**
    * The component used for the transition.
    * [Follow this guide](/material-ui/transitions/#transitioncomponent-prop) to learn more about the requirements for this component.
-   * @default Collapse
+   * @deprecated Use `slots.transition` instead. This prop will be removed in v7.
    */
   TransitionComponent: PropTypes.elementType,
   /**
    * Props applied to the transition element.
    * By default, the element is based on this [`Transition`](http://reactcommunity.org/react-transition-group/transition/) component.
+   * @deprecated Use `slotProps.transition` instead. This prop will be removed in v7.
    */
   TransitionProps: PropTypes.object,
 };

packages/mui-material/src/Accordion/Accordion.test.js

@@ -28,6 +28,11 @@ describe('<Accordion />', () => {
     refInstanceof: window.HTMLDivElement,
     muiName: 'MuiAccordion',
     testVariantProps: { variant: 'rounded' },
+    slots: {
+      transition: {
+        testWithElement: null,
+      },
+    },
     skip: ['componentProp', 'componentsProp'],
   }));
 
@@ -210,4 +215,40 @@ describe('<Accordion />', () => {
       'MUI: A component is changing the uncontrolled expanded state of Accordion to be controlled.',
     );
   });
+
+  describe('prop: TransitionProps', () => {
+    it('should apply properties to the Transition component', () => {
+      const { getByTestId } = render(
+        <Accordion TransitionProps={{ 'data-testid': 'transition-testid' }}>
+          {minimalChildren}
+        </Accordion>,
+      );
+
+      expect(getByTestId('transition-testid')).not.to.equal(null);
+    });
+  });
+
+  describe('details unmounting behavior', () => {
+    it('does not unmount by default', () => {
+      const { queryByTestId } = render(
+        <Accordion expanded={false}>
+          <AccordionSummary>Summary</AccordionSummary>
+          <div data-testid="details">Details</div>
+        </Accordion>,
+      );
+
+      expect(queryByTestId('details')).not.to.equal(null);
+    });
+
+    it('unmounts if opted in via slotProps.transition', () => {
+      const { queryByTestId } = render(
+        <Accordion expanded={false} slotProps={{ transition: { unmountOnExit: true } }}>
+          <AccordionSummary>Summary</AccordionSummary>
+          <div data-testid="details">Details</div>
+        </Accordion>,
+      );
+
+      expect(queryByTestId('details')).to.equal(null);
+    });
+  });
 });

packages/mui-material/src/AccordionSummary/accordionSummaryClasses.ts

@@ -12,7 +12,10 @@ export interface AccordionSummaryClasses {
   disabled: string;
   /** Styles applied to the root element unless `disableGutters={true}`. */
   gutters: string;
-  /** Styles applied to the children wrapper element unless `disableGutters={true}`. */
+  /**
+   * Styles applied to the children wrapper element unless `disableGutters={true}`.
+   * @deprecated Combine the [.MuiAccordionSummary-gutters](/material-ui/api/accordion-summary/#AccordionSummary-classes-gutters) and [.MuiAccordionSummary-content](/material-ui/api/accordion-summary/#AccordionSummary-classes-content) classes instead.
+   */
   contentGutters: string;
   /** Styles applied to the children wrapper element. */
   content: string;

packages/mui-material/src/utils/types.ts

@@ -0,0 +1,33 @@
+import { SxProps } from '@mui/system';
+import { SlotComponentProps } from '@mui/base';
+
+export type SlotCommonProps = {
+  component?: React.ElementType;
+  sx?: SxProps;
+};
+
+export type SlotProps<
+  TSlotComponent extends React.ElementType,
+  TOverrides,
+  TOwnerState,
+> = SlotComponentProps<TSlotComponent, SlotCommonProps & TOverrides, TOwnerState>;
+
+/**
+ * Use the keys of `Slots` to make sure that K contains all of the keys
+ *
+ * @example CreateSlotsAndSlotProps<{ root: React.ElementType, decorator: React.ElementType }, { root: ..., decorator: ... }>
+ */
+export type CreateSlotsAndSlotProps<Slots, K extends Record<keyof Slots, any>> = {
+  /**
+   * The components used for each slot inside.
+   * @default {}
+   */
+  slots?: Slots;
+  /**
+   * The props used for each slot inside.
+   * @default {}
+   */
+  slotProps?: {
+    [P in keyof K]?: K[P];
+  };
+};