Readonly select items prop

packages/select/src/common/itemListRenderer.ts

@@ -37,13 +37,13 @@ export interface IItemListRendererProps<T> {
  * map each item in this array through `renderItem`, with support for
  * optional `noResults` and `initialContent` states.
  */
- filteredItems: T[];
+ filteredItems: readonly T[];
 
  /**
  * Array of all items in the list.
  * See `filteredItems` for a filtered array based on `query` and predicate props.
  */
- items: T[];
+ items: readonly T[];
 
  /**
  * The current query string.

packages/select/src/common/listItemsProps.ts

@@ -44,7 +44,7 @@ export interface IListItemsProps<T> extends Props {
  activeItem?: T | ICreateNewItem | null;
 
  /** Array of items in the list. */
- items: T[];
+ items: readonly T[];
 
  /**
  * Specifies how to test if two items are equal. By default, simple strict

packages/select/src/common/predicate.ts

@@ -18,7 +18,7 @@
  * A custom predicate for returning an entirely new `items` array based on the provided query.
  * See usage sites in `IListItemsProps`.
  */
-export type ItemListPredicate<T> = (query: string, items: T[]) => T[];
+export type ItemListPredicate<T> = (query: string, items: readonly T[]) => T[];
 
 /**
  * A custom predicate for filtering items based on the provided query.

packages/select/src/components/query-list/queryList.tsx

@@ -134,7 +134,7 @@ export interface IQueryListState<T> {
  createNewItem: T | undefined;
 
  /** The original `items` array filtered by `itemListPredicate` or `itemPredicate`. */
- filteredItems: T[];
+ filteredItems: readonly T[];
 
  /** The current query string. */
  query: string;
@@ -645,7 +645,7 @@ function isItemDisabled<T>(item: T | null, index: number, itemDisabled?: IListIt
  * @param startIndex which index to begin moving from
  */
 export function getFirstEnabledItem<T>(
- items: T[],
+ items: readonly T[],
  itemDisabled?: keyof T | ((item: T, index: number) => boolean),
  direction = 1,
  startIndex = items.length - 1,

packages/select/src/components/select/multiSelect.tsx

@@ -83,7 +83,7 @@ export interface IMultiSelectProps<T> extends IListItemsProps<T> {
  popoverProps?: Partial<IPopoverProps> & object;
 
  /** Controlled selected values. */
- selectedItems?: T[];
+ selectedItems?: readonly T[];
 
  /** Props to spread to `TagInput`. Use `query` and `onQueryChange` to control the input. */
  // eslint-disable-next-line @typescript-eslint/ban-types