feat(useCombobox): remove selectedItemChanged

src/hooks/MIGRATION_V9.md

@@ -13,6 +13,7 @@ hooks and are detailed below.
 - [getA11ySelectionMessage](#geta11yselectionmessage)
 - [getA11yRemovalMessage](#geta11yremovalmessage)
 - [getA11yStatusMessage](#geta11ystatusmessage)
+- [selectedItemChanged](#selecteditemchanged)
 
 <!-- END doctoc generated TOC please keep comment here to allow auto update -->
 
@@ -22,11 +23,13 @@ The handlers below have their types improved to reflect that they will always
 get called with their corresponding state prop:
 
 - useCombobox
+
   - onSelectedItemChange: selectedItem is non optional
   - onIsOpenChange: isOpen is non optional
   - onHighlightedIndexChange: highlightedIndex is non optional
 
 - useSelect
+
   - onSelectedItemChange: selectedItem is non optional
   - onIsOpenChange: isOpen is non optional
   - onHighlightedIndexChange: highlightedIndex is non optional
@@ -80,3 +83,12 @@ References:
 - [useCombobox docs](https://github.com/downshift-js/downshift/blob/master/src/hooks/useCombobox/README.md#geta11ystatusmessage)
 - [useSelect docs](https://github.com/downshift-js/downshift/blob/master/src/hooks/useSelect/README.md#geta11ystatusmessage)
 - [useMultipleSelection docs](https://github.com/downshift-js/downshift/blob/master/src/hooks/useMultipleSelection/README.md#geta11ystatusmessage)
+
+## selectedItemChanged
+
+This prop has been removed from `useCombobox`. You should use `itemToKey`
+instead.
+
+Reference:
+
+[itemToKey docs](https://github.com/downshift-js/downshift/blob/master/src/hooks/useCombobox/README.md#itemtokey)

src/hooks/useCombobox/README.md

@@ -82,7 +82,6 @@ and update if necessary.
   - [defaultHighlightedIndex](#defaulthighlightedindex)
   - [defaultInputValue](#defaultinputvalue)
   - [itemToKey](#itemtokey)
-  - [selectedItemChanged](#selecteditemchanged)
   - [getA11yStatusMessage](#geta11ystatusmessage)
   - [onHighlightedIndexChange](#onhighlightedindexchange)
   - [onIsOpenChange](#onisopenchange)
@@ -411,8 +410,8 @@ function itemToKey(item) {
 ```
 
 > This deprecates the "selectedItemChanged" prop. If you are using the prop
-> already, make sure you change to "itemToKey" as the former will be removed in
-> the next Breaking Change update. A migration example:
+> already, make sure you change to "itemToKey" as the former is removed in v9. A
+> migration example:
 
 ```js
 // initial items.
@@ -438,16 +437,6 @@ function itemToKey(item) {
 }
 ```
 
-### selectedItemChanged
-
-> DEPRECATED. Please use "itemToKey".
-
-> `function(prevItem: any, item: any)` | defaults to:
-> `(prevItem, item) => (prevItem !== item)`
-
-Used to determine if the new `selectedItem` has changed compared to the previous
-`selectedItem` and properly update Downshift's internal state.
-
 ### getA11yStatusMessage
 
 > `function({/* see below */})` | default messages provided in English

src/hooks/useCombobox/__tests__/props.test.js

@@ -71,123 +71,6 @@ describe('props', () => {
     })
   })
 
-  describe('selectedItemChanged', () => {
-    test('props update of selectedItem will update inputValue state with default selectedItemChanged referential equality check', () => {
-      const initialSelectedItem = {id: 3, value: 'init'}
-      const selectedItem = {id: 1, value: 'wow'}
-      const newSelectedItem = {id: 1, value: 'not wow'}
-      function itemToString(item) {
-        return item.value
-      }
-      const stateReducer = jest
-        .fn()
-        .mockImplementation((_state, {changes}) => changes)
-
-      const {rerender} = renderCombobox({
-        stateReducer,
-        itemToString,
-        selectedItem: initialSelectedItem,
-      })
-
-      expect(stateReducer).not.toHaveBeenCalled() // won't get called on first render
-
-      rerender({
-        stateReducer,
-        itemToString,
-        selectedItem,
-      })
-
-      expect(stateReducer).toHaveBeenCalledTimes(1)
-      expect(stateReducer).toHaveBeenCalledWith(
-        {
-          inputValue: itemToString(initialSelectedItem),
-          selectedItem,
-          highlightedIndex: -1,
-          isOpen: false,
-        },
-        expect.objectContaining({
-          type: useCombobox.stateChangeTypes.ControlledPropUpdatedSelectedItem,
-          changes: {
-            inputValue: itemToString(selectedItem),
-            selectedItem,
-            highlightedIndex: -1,
-            isOpen: false,
-          },
-        }),
-      )
-
-      stateReducer.mockClear()
-      rerender({
-        stateReducer,
-        selectedItem: newSelectedItem,
-        itemToString,
-      })
-
-      expect(stateReducer).toHaveBeenCalledTimes(1)
-      expect(stateReducer).toHaveBeenCalledWith(
-        {
-          inputValue: itemToString(selectedItem),
-          selectedItem: newSelectedItem,
-          highlightedIndex: -1,
-          isOpen: false,
-        },
-        expect.objectContaining({
-          changes: {
-            inputValue: itemToString(newSelectedItem),
-            selectedItem: newSelectedItem,
-            highlightedIndex: -1,
-            isOpen: false,
-          },
-          type: useCombobox.stateChangeTypes.ControlledPropUpdatedSelectedItem,
-        }),
-      )
-      expect(getInput()).toHaveValue(itemToString(newSelectedItem))
-    })
-
-    test('props update of selectedItem will not update inputValue state if selectedItemChanged returns false', () => {
-      const consoleWarnSpy = jest
-        .spyOn(console, 'warn')
-        .mockImplementation(() => {})
-      const initialSelectedItem = {id: 1, value: 'hmm'}
-      const selectedItem = {id: 1, value: 'wow'}
-      function itemToString(item) {
-        return item.value
-      }
-      const selectedItemChanged = jest
-        .fn()
-        .mockImplementation((prev, next) => prev.id !== next.id)
-      const stateReducer = jest
-        .fn()
-        .mockImplementation((_state, {changes}) => changes)
-
-      const {rerender} = renderCombobox({
-        selectedItemChanged,
-        stateReducer,
-        selectedItem: initialSelectedItem,
-        itemToString,
-      })
-
-      rerender({
-        selectedItemChanged,
-        stateReducer,
-        selectedItem,
-        itemToString,
-      })
-
-      expect(getInput()).toHaveValue(itemToString(initialSelectedItem))
-      expect(selectedItemChanged).toHaveBeenCalledTimes(1)
-      expect(selectedItemChanged).toHaveBeenCalledWith(
-        initialSelectedItem,
-        selectedItem,
-      )
-      expect(consoleWarnSpy).toHaveBeenCalledTimes(1)
-      expect(consoleWarnSpy).toHaveBeenCalledWith(
-        `The "selectedItemChanged" is deprecated. Please use "itemToKey instead". https://github.com/downshift-js/downshift/blob/master/src/hooks/useCombobox/README.md#selecteditemchanged`,
-      )
-      consoleWarnSpy.mockRestore()
-    })
-  })
-
   describe('itemToKey', () => {
     test('props update of selectedItem will update inputValue state with default itemToKey referential equality check', () => {
       const initialSelectedItem = {id: 3, value: 'init'}

src/hooks/useCombobox/utils.js

@@ -35,7 +35,6 @@ const propTypes = {
   ...commonDropdownPropTypes,
   items: PropTypes.array.isRequired,
   isItemDisabled: PropTypes.func,
-  selectedItemChanged: PropTypes.func,
   inputValue: PropTypes.string,
   defaultInputValue: PropTypes.string,
   initialInputValue: PropTypes.string,
@@ -79,22 +78,9 @@ export function useControlledReducer(
     if (
       !isInitialMount // on first mount we already have the proper inputValue for a initial selected item.
     ) {
-      let shouldCallDispatch
-
-      if (props.selectedItemChanged === undefined) {
-        shouldCallDispatch =
-          props.itemToKey(props.selectedItem) !==
-          props.itemToKey(previousSelectedItemRef.current)
-      } else {
-        console.warn(
-          `The "selectedItemChanged" is deprecated. Please use "itemToKey instead". https://github.com/downshift-js/downshift/blob/master/src/hooks/useCombobox/README.md#selecteditemchanged`,
-        )
-
-        shouldCallDispatch = props.selectedItemChanged(
-          previousSelectedItemRef.current,
-          props.selectedItem,
-        )
-      }
+      const shouldCallDispatch =
+        props.itemToKey(props.selectedItem) !==
+        props.itemToKey(previousSelectedItemRef.current)
 
       if (shouldCallDispatch) {
         dispatch({

typings/index.d.ts

@@ -555,7 +555,6 @@ export interface UseComboboxProps<Item> {
   isItemDisabled?(item: Item, index: number): boolean
   itemToString?: (item: Item | null) => string
   itemToKey?: (item: Item | null) => any
-  selectedItemChanged?: (prevItem: Item, item: Item) => boolean
   getA11yStatusMessage?: (options: UseComboboxState<Item>) => string
   highlightedIndex?: number
   initialHighlightedIndex?: number