fiyes shadow hydration escaping

Author: PH4NTOMiki

.changeset/late-foxes-clean.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+fixes shadow hydration escaping

packages/kit/src/runtime/client/renderer.js

@@ -223,7 +223,12 @@ export class Renderer {
 				if (is_leaf) {
 					const serialized = document.querySelector('[data-type="svelte-props"]');
 					if (serialized) {
-						props = JSON.parse(/** @type {string} */ (serialized.textContent));
+						props = JSON.parse(
+							/** @type {string} */ (serialized.textContent)
+								.replace(new RegExp('&', 'g'), '&')
+								.replace(new RegExp('&lt;', 'g'), '<')
+								.replace(new RegExp('&gt;', 'g'), '>')
+						);
 					}
 				}
 

packages/kit/src/runtime/server/page/render.js

@@ -261,7 +261,7 @@ export async function render_response({
 
 			if (shadow_props) {
 				// prettier-ignore
-				body += `<script type="application/json" data-type="svelte-props">${s(shadow_props)}</script>`;
+				body += `<script type="application/json" data-type="svelte-props">${s(shadow_props).replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;')}</script>`;
 			}
 		}