chore: remove selector api

Author: trueadm

packages/svelte/src/internal/client/runtime.js

@@ -1243,105 +1243,6 @@ export function set_signal_status(signal, status) {
 	}
 }
 
-/** @template V */
-class Selector {
-	/** @type {Map<V, Set<import('./types.js').Signal>>} */
-	#consumers_map = new Map();
-
-	/** @type {import('./types.js').Signal<V | null>} */
-	#active_key;
-
-	/** @param {V | null} [key] */
-	constructor(key) {
-		this.#active_key = source(key || null);
-	}
-
-	get current() {
-		return get(this.#active_key);
-	}
-
-	/**
-	 * @param {V | null} key
-	 * @returns {void}
-	 */
-	set(key) {
-		const active_key = this.#active_key;
-		const previous_key = active_key.value;
-		if (previous_key === key) {
-			return;
-		}
-
-		set_signal_value(active_key, key);
-
-		const consumers_map = this.#consumers_map;
-		let consumers = map_get(consumers_map, /** @type {V} */ (previous_key));
-		if (consumers !== undefined) {
-			this.#update_consumers(consumers);
-		}
-
-		consumers = map_get(consumers_map, /** @type {V} */ (key));
-		if (consumers !== undefined) {
-			this.#update_consumers(consumers);
-		}
-	}
-
-	/**
-	 * @param {Set<import('./types.js').Signal>} consumers
-	 * @returns {void}
-	 */
-	#update_consumers(consumers) {
-		let consumer;
-		for (consumer of consumers) {
-			set_signal_status(consumer, DIRTY);
-			if ((consumer.flags & IS_EFFECT) !== 0) {
-				schedule_effect(/** @type {import('./types.js').EffectSignal} */ (consumer), false);
-			} else {
-				mark_signal_consumers(consumer, DIRTY, true);
-			}
-		}
-	}
-
-	/**
-	 * @param {V} key
-	 * @returns {boolean}
-	 */
-	is(key) {
-		const consumers_map = this.#consumers_map;
-		let consumers = map_get(consumers_map, key);
-		if (consumers === undefined) {
-			consumers = new Set();
-			map_set(consumers_map, key, consumers);
-		}
-
-		const consumer = current_consumer;
-		const effect = current_effect;
-		if (effect !== null && consumer !== null && !consumers.has(consumer)) {
-			consumers.add(consumer);
-			push_destroy_fn(effect, () => {
-				const consumers_set = /** @type {Set<import('./types.js').Signal>} */ (consumers);
-				consumers_set.delete(effect);
-				if (consumers_set.size === 0) {
-					map_delete(consumers_map, key);
-				}
-			});
-		}
-		return this.#active_key.value === key;
-	}
-}
-
-/**
- * `selector` allows you to track the currently selected item in a list in a performance optimized manner
- * that runs in constant time (O(1)) - this is only noticable for very large lists.
- *
- * https://svelte-5-preview.vercel.app/docs/functions#selector
- * @template Key
- * @param {Key | null} [key]
- * @returns {Selector<Key>}
- */
-export function selector(key) {
-	return new Selector(key);
-}
-
 /**
  * @template V
  * @param {V | import('./types.js').Signal<V>} val

packages/svelte/src/internal/index.js

@@ -13,7 +13,6 @@ export {
 	user_effect,
 	render_effect,
 	pre_effect,
-	selector,
 	flushSync,
 	bubble_event,
 	safe_equal,

packages/svelte/src/main/main-client.js

@@ -255,12 +255,4 @@ export function afterUpdate(fn) {
 
 // TODO bring implementations in here
 // (except probably untrack — do we want to expose that, if there's also a rune?)
-export {
-	flushSync,
-	createRoot,
-	mount,
-	tick,
-	untrack,
-	onDestroy,
-	selector
-} from '../internal/index.js';
+export { flushSync, createRoot, mount, tick, untrack, onDestroy } from '../internal/index.js';

packages/svelte/src/main/main-server.js

@@ -7,7 +7,6 @@ export {
 	hasContext,
 	mount,
 	onDestroy,
-	selector,
 	setContext,
 	tick,
 	untrack

packages/svelte/tests/runtime-runes/samples/selector/_config.js

@@ -2,7 +2,7 @@
 title: Functions
 ---
 
-As well as runes, Svelte 5 will introduce a couple of new functions, in addition to existing functions like `getContext`, `setContext` and `tick`. These are introduced as functions rather than runes because they are used directly and the compiler does not need to touch them to make them function as it does with runes. However, these functions may still use Svelte internals.
+As well as runes, Svelte 5 will introduces a some new functions, in addition to existing functions like `getContext`, `setContext` and `tick`. These are introduced as functions rather than runes because they are used directly and the compiler does not need to touch them to make them function as it does with runes. However, these functions may still use Svelte internals.
 
 ## `untrack`
 
@@ -22,22 +22,3 @@ To prevent something from being treated as an `$effect`/`$derived` dependency, u
 	});
 </script>
 ```
-
-## `selector`
-
-`selector` allows you to track the currently selected item in a list in a performance optimized manner that runs in constant time (`O(1)`). With `selector`, you can immediately determine if an item is selected:
-
-```svelte
-<script>
-	import { selector } from 'svelte';
-
-	let array = $state([1, 2, 3]);
-	let selected = selector();
-</script>
-
-{#each array as item}
-	<button on:click={() => selected.set(item)}>{selected.is(item)}</button>
-{/each}
-
-<p>{selected.current}</p>
-```