fixes

documentation/docs/98-reference/.generated/server-warnings.md

@@ -7,9 +7,6 @@ A `hydratable` value with key `%key%` was created, but at least part of it was n
 
 The `hydratable` was initialized in:
 %stack%
-
-The unresolved data is:
-%unresolved_data%
 ```
 
 The most likely cause of this is creating a `hydratable` in the `script` block of your component and then `await`ing

packages/svelte/messages/server-warnings/warnings.md

@@ -4,9 +4,6 @@
 >
 > The `hydratable` was initialized in:
 > %stack%
->
-> The unresolved data is:
-> %unresolved_data%
 
 The most likely cause of this is creating a `hydratable` in the `script` block of your component and then `await`ing
 the result inside a `svelte:boundary` with a `pending` snippet:

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

@@ -21,11 +21,8 @@ export function hydratable(key, fn) {
 	}
 
 	const store = window.__svelte?.h;
-	const unused_keys = window.__svelte?.uh;
 	if (!store?.has(key)) {
-		if (!unused_keys?.has(key)) {
+		hydratable_missing_but_expected(key);
-			hydratable_missing_but_expected(key);
-		}
 		return fn();
 	}
 

packages/svelte/src/internal/client/types.d.ts

@@ -7,8 +7,6 @@ declare global {
 		__svelte?: {
 			/** hydratables */
 			h?: Map<string, unknown>;
-			/** unused hydratable keys */
-			uh?: Set<string>;
 		};
 	}
 }

packages/svelte/src/internal/server/renderer.js

@@ -10,7 +10,6 @@ import { BLOCK_CLOSE, BLOCK_OPEN } from './hydration.js';
 import { attributes } from './index.js';
 import { get_render_context, with_render_context, init_render_context } from './render-context.js';
 import { DEV } from 'esm-env';
-import { get_stack } from './dev.js';
 
 /** @typedef {'head' | 'body'} RendererType */
 /** @typedef {{ [key in RendererType]: string }} AccumulatedContent */
@@ -578,14 +577,10 @@ export class Renderer {
 	async #collect_hydratables() {
 		const ctx = get_render_context().hydratable;
 
-		for (const [promise, key] of ctx.unresolved_promises) {
+		for (const [_, key] of ctx.unresolved_promises) {
 			// this is a problem -- it means we've finished the render but we're still waiting on a promise to resolve so we can
 			// serialize it, so we're blocking the response on useless content.
-			w.unresolved_hydratable(
+			w.unresolved_hydratable(key, ctx.lookup.get(key)?.dev?.stack ?? '<missing stack trace>');
-				key,
-				ctx.lookup.get(key)?.dev?.stack ?? '<missing stack trace>',
-				await promise
-			);
 		}
 
 		for (const comparison of ctx.comparisons) {
@@ -593,7 +588,7 @@ export class Renderer {
 			await comparison;
 		}
 
-		return await Renderer.#hydratable_block(ctx, []);
+		return await Renderer.#hydratable_block(ctx);
 	}
 
 	/**
@@ -652,10 +647,9 @@ export class Renderer {
 
 	/**
 	 * @param {HydratableContext} ctx
-	 * @param {string[]} unused_keys
 	 */
-	static async #hydratable_block(ctx, unused_keys) {
+	static async #hydratable_block(ctx) {
-		if (ctx.lookup.size === 0 && unused_keys.length === 0) {
+		if (ctx.lookup.size === 0) {
 			return null;
 		}
 
@@ -672,11 +666,11 @@ export class Renderer {
 			{
 				const r = (v) => Promise.resolve(v);
 				const v = [${values.join(',')}];
-				function d(i) { 
+				function d(i) {
 					const value = v[i];
 					return typeof value === 'function' ? value() : value;
 				};
-				const sv = window.__svelte ??= {};${Renderer.#used_hydratables(ctx.lookup)}${Renderer.#unused_hydratables(unused_keys)}
+				const sv = window.__svelte ??= {};${Renderer.#used_hydratables(ctx.lookup)}
 			}
 		</script>`;
 	}
@@ -693,16 +687,6 @@ export class Renderer {
 						store.set(k, d(i));
 				}`;
 	}
-
-	/** @param {string[]} unused_keys */
-	static #unused_hydratables(unused_keys) {
-		if (unused_keys.length === 0) return '';
-		return `
-				const unused = sv.uh ??= new Set();
-				for (const k of ${JSON.stringify(unused_keys)}) {
-					unused.add(k);
-				}`;
-	}
 }
 
 export class SSRState {

packages/svelte/src/internal/server/renderer.test.ts

@@ -2,7 +2,6 @@ import { afterAll, beforeAll, describe, expect, test } from 'vitest';
 import { Renderer, SSRState } from './renderer.js';
 import type { Component } from 'svelte';
 import { disable_async_mode_flag, enable_async_mode_flag } from '../flags/index.js';
-import { uneval } from 'devalue';
 
 test('collects synchronous body content by default', () => {
 	const component = (renderer: Renderer) => {

packages/svelte/src/internal/server/warnings.js

@@ -10,23 +10,16 @@ var normal = 'font-weight: normal';
  * 
  * The `hydratable` was initialized in:
  * %stack%
- * 
- * The unresolved data is:
- * %unresolved_data%
  * @param {string} key
  * @param {string} stack
- * @param {string} unresolved_data
  */
-export function unresolved_hydratable(key, stack, unresolved_data) {
+export function unresolved_hydratable(key, stack) {
 	if (DEV) {
 		console.warn(
 			`%c[svelte] unresolved_hydratable\n%cA \`hydratable\` value with key \`${key}\` was created, but at least part of it was not used during the render.
 
 The \`hydratable\` was initialized in:
-${stack}
+${stack}\nhttps://svelte.dev/e/unresolved_hydratable`,
-
-The unresolved data is:
-${unresolved_data}\nhttps://svelte.dev/e/unresolved_hydratable`,
 			bold,
 			normal
 		);

packages/svelte/tests/runtime-legacy/shared.ts

@@ -107,7 +107,6 @@ declare global {
 	var __svelte:
 		| {
 				h?: Map<string, unknown>;
-				uh?: Set<string>;
 		  }
 		| undefined;
 }
@@ -127,7 +126,6 @@ beforeAll(() => {
 
 beforeEach(() => {
 	delete globalThis?.__svelte?.h;
-	delete globalThis?.__svelte?.uh;
 });
 
 afterAll(() => {

packages/svelte/tests/runtime-runes/samples/hydratable-unused-keys/_config.js

@@ -15,7 +15,7 @@ export default test({
 	},
 
 	async test({ assert, target }) {
-		// let it hydrate and resolve the promise on the client
+		// make sure the hydratable promise on the client has a chance to run and reject (it shouldn't, because the server data should be used)
 		await tick();
 
 		assert.htmlEqual(