remove symbol and class support

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

@@ -21,7 +21,6 @@ import { READONLY_SYMBOL } from './readonly.js';
 /** @typedef {Record<string | symbol, any> & { [STATE_SYMBOL]: Metadata }} StateObject */
 
 export const STATE_SYMBOL = Symbol('$state');
-export const UNSTATE_SYMBOL = Symbol('unstate');
 
 const object_prototype = Object.prototype;
 const array_prototype = Array.prototype;
@@ -56,43 +55,35 @@ export function proxy(value) {
  * @returns {Record<string | symbol, any>}
  */
 function unwrap(value, already_unwrapped = new Map()) {
-	if (typeof value === 'object' && value != null && !is_frozen(value)) {
+	if (typeof value === 'object' && value != null && !is_frozen(value) && STATE_SYMBOL in value) {
 		const unwrapped = already_unwrapped.get(value);
 		if (unwrapped !== undefined) {
 			return unwrapped;
 		}
-		if (STATE_SYMBOL in value) {
-			if (is_array(value)) {
-				/** @type {Record<string | symbol, any>} */
-				const array = [];
-				already_unwrapped.set(value, array);
-				for (const element of value) {
-					array.push(unwrap(element, already_unwrapped));
-				}
-				return array;
-			} else {
-				/** @type {Record<string | symbol, any>} */
-				const obj = {};
-				const keys = object_keys(value);
-				const descriptors = get_descriptors(value);
-				already_unwrapped.set(value, obj);
-				for (const key of keys) {
-					if (descriptors[key].get) {
-						define_property(obj, key, descriptors[key]);
-					} else {
-						/** @type {T} */
-						const property = value[key];
-						obj[key] = unwrap(property, already_unwrapped);
-					}
+		if (is_array(value)) {
+			/** @type {Record<string | symbol, any>} */
+			const array = [];
+			already_unwrapped.set(value, array);
+			for (const element of value) {
+				array.push(unwrap(element, already_unwrapped));
+			}
+			return array;
+		} else {
+			/** @type {Record<string | symbol, any>} */
+			const obj = {};
+			const keys = object_keys(value);
+			const descriptors = get_descriptors(value);
+			already_unwrapped.set(value, obj);
+			for (const key of keys) {
+				if (descriptors[key].get) {
+					define_property(obj, key, descriptors[key]);
+				} else {
+					/** @type {T} */
+					const property = value[key];
+					obj[key] = unwrap(property, already_unwrapped);
 				}
-				return obj;
 			}
-		}
-		const unstate_fn = /** @type {undefined | ((this: StateObject) => T)} */ (
-			value[UNSTATE_SYMBOL]
-		);
-		if (typeof unstate_fn === 'function') {
-			return unstate_fn.call(value);
+			return obj;
 		}
 	}
 	return value;

packages/svelte/src/internal/index.js

@@ -45,7 +45,7 @@ export * from './client/each.js';
 export * from './client/render.js';
 export * from './client/validate.js';
 export { raf } from './client/timing.js';
-export { proxy, readonly, unstate, UNSTATE_SYMBOL } from './client/proxy/proxy.js';
+export { proxy, readonly, unstate } from './client/proxy/proxy.js';
 
 export { create_custom_element } from './client/custom-element.js';
 

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

@@ -262,6 +262,5 @@ export {
 	tick,
 	untrack,
 	unstate,
-	onDestroy,
-	UNSTATE_SYMBOL
+	onDestroy
 } from '../internal/index.js';

packages/svelte/tests/runtime-runes/samples/unstate-class/_config.js

@@ -1,12 +0,0 @@
-import { test } from '../../test';
-
-export default test({
-	html: `<button>[{"data":{"a":0}}]</button>`,
-
-	async test({ assert, target }) {
-		const btn = target.querySelector('button');
-
-		await btn?.click();
-		assert.htmlEqual(target.innerHTML, `<button>[{"data":{"a":0}},{"data":{"a":1}}]</button>`);
-	}
-});

packages/svelte/tests/runtime-runes/samples/unstate-class/main.svelte

@@ -1,22 +0,0 @@
-<script>
-		import { unstate, UNSTATE_SYMBOL } from 'svelte';
-
-		class Item {
-			data = $state()
-
-			constructor(a) {
-				this.data = { a };
-			}
-
-			[UNSTATE_SYMBOL]() {
-				debugger
-				return {
-					data: unstate(this.data)
-				};
-			}
-		}
-
-    let items = $state([new Item(0)]);
-</script>
-
-<button on:click={() => items.push(new Item(items.length))}>{JSON.stringify(structuredClone(unstate(items)))}</button>

sites/svelte-5-preview/src/routes/docs/content/01-api/05-functions.md

@@ -42,31 +42,4 @@ To remove reactivity from objects and arrays created with `$state`, use `unstate
 
 This is handy when you want to pass some state to an external library or API that doesn't expect a reactive object – such as `structuredClone`.
 
-For classes that might contain `$state`, the `UNSTATE_SYMBOL` can be imported and applied as a class method to enable deep unwrapped of reactive state
-through class components:
-
-```svelte
-<script>
-	import { unstate, UNSTATE_SYMBOL } from 'svelte';
-
-	class Collection {
-		#items = $state([]);
-
-		add(item) {
-			this.#items.push(item);
-		}
-
-		[UNSTATE_SYMBOL]() {
-			return { items: unstate(this.#items) };
-		}
-	}
-
-	const collection = new Collection();
-	collection.add('Hello world');
-
-	// Will log { items: ['Hello world'] }
-	console.log(unstate(collection));
-</script>
-```
-
 > Note that `unstate` will return a new object from the input when removing reactivity. If the object passed isn't reactive, it will be returned as is.