[useSnackbar] Add explicit return type

docs/pages/base/api/use-snackbar.json

@@ -18,7 +18,22 @@
     "ref": { "type": { "name": "React.Ref<any&gt", "description": "React.Ref<any&gt" } },
     "resumeHideDuration": { "type": { "name": "number", "description": "number" } }
   },
-  "returnValue": {},
+  "returnValue": {
+    "getRootProps": {
+      "type": {
+        "name": "<TOther extends Record<string, ((event: any) =&gt void) | undefined&gt = {}&gt(externalProps?: TOther) =&gt UseSnackbarRootSlotProps<TOther&gt",
+        "description": "<TOther extends Record<string, ((event: any) =&gt void) | undefined&gt = {}&gt(externalProps?: TOther) =&gt UseSnackbarRootSlotProps<TOther&gt"
+      },
+      "required": true
+    },
+    "onClickAway": {
+      "type": {
+        "name": "(event: React.SyntheticEvent<any&gt | Event) =&gt void",
+        "description": "(event: React.SyntheticEvent<any&gt | Event) =&gt void"
+      },
+      "required": true
+    }
+  },
   "name": "useSnackbar",
   "filename": "/packages/mui-base/src/useSnackbar/useSnackbar.ts",
   "demos": "<ul><li><a href=\"/base/react-snackbar/#hook\">Unstyled Snackbar</a></li></ul>"

docs/translations/api-docs/use-snackbar/use-snackbar.json

@@ -7,5 +7,8 @@
     "open": "If <code>true</code>, the component is shown.",
     "resumeHideDuration": "The number of milliseconds to wait before dismissing after user interaction.\nIf <code>autoHideDuration</code> prop isn't specified, it does nothing.\nIf <code>autoHideDuration</code> prop is specified but <code>resumeHideDuration</code> isn't,\nwe default to <code>autoHideDuration / 2</code> ms."
   },
-  "returnValueDescriptions": {}
+  "returnValueDescriptions": {
+    "getRootProps": "Resolver for the root slot's props.",
+    "onClickAway": "Callback fired when a \"click away\" event is detected."
+  }
 }

packages/mui-base/src/useSnackbar/useSnackbar.ts

@@ -3,7 +3,7 @@ import { unstable_useEventCallback as useEventCallback } from '@mui/utils';
 import {
   UseSnackbarParameters,
   SnackbarCloseReason,
-  UseSnackbarRootSlotProps,
+  UseSnackbarReturnValue,
 } from './useSnackbar.types';
 import extractEventHandlers from '../utils/extractEventHandlers';
 
@@ -18,7 +18,7 @@ import extractEventHandlers from '../utils/extractEventHandlers';
  *
  * - [useSnackbar API](https://mui.com/base/api/use-snackbar/)
  */
-export default function useSnackbar(parameters: UseSnackbarParameters) {
+export default function useSnackbar(parameters: UseSnackbarParameters): UseSnackbarReturnValue {
   const {
     autoHideDuration = null,
     disableWindowBlurListener = false,
@@ -145,9 +145,11 @@ export default function useSnackbar(parameters: UseSnackbarParameters) {
     return undefined;
   }, [disableWindowBlurListener, handleResume, open]);
 
-  const getRootProps = <TOther extends Record<string, React.EventHandler<any> | undefined> = {}>(
-    otherHandlers: TOther = {} as TOther,
-  ): UseSnackbarRootSlotProps<TOther> => {
+  const getRootProps: UseSnackbarReturnValue['getRootProps'] = <
+    TOther extends Parameters<UseSnackbarReturnValue['getRootProps']>[0],
+  >(
+    otherHandlers: TOther,
+  ) => {
     const propsEventHandlers = extractEventHandlers(parameters) as Partial<UseSnackbarParameters>;
     const externalEventHandlers = {
       ...propsEventHandlers,

packages/mui-base/src/useSnackbar/useSnackbar.types.ts

@@ -49,3 +49,18 @@ export interface UseSnackbarRootSlotOwnProps {
   ref?: React.Ref<any>;
   role: React.AriaRole;
 }
+
+export interface UseSnackbarReturnValue {
+  /**
+   * Resolver for the root slot's props.
+   * @param externalProps props for the root slot
+   * @returns props that should be spread on the root slot
+   */
+  getRootProps: <TOther extends Record<string, ((event: any) => void) | undefined> = {}>(
+    externalProps?: TOther,
+  ) => UseSnackbarRootSlotProps<TOther>;
+  /**
+   * Callback fired when a "click away" event is detected.
+   */
+  onClickAway: (event: React.SyntheticEvent<any> | Event) => void;
+}