gkurt · Nov 2, 2026 · Nov 2, 2026
diff --git a/.tegami/2026-11-02-set-only-property-read.md b/.tegami/2026-11-02-set-only-property-read.md
diff --git a/.tegami/2026-11-02-vite-previewer.md b/.tegami/2026-11-02-vite-previewer.md
diff --git a/.tegami/2026-11-02-webgl-modules.md b/.tegami/2026-11-02-webgl-modules.md
diff --git a/.tegami/publish-lock.yaml b/.tegami/publish-lock.yaml
@@ -1,6 +1,6 @@
 core:changelogs:
-  - content: "---\npackages:\n  upm:com.reactunity.core:\n    type: patch\n  npm:@reactunity/renderer:\n    type: patch\n---\n\n### `new URL(path, base)` accepts a URL object as the base\n\n`URL` only took a string base, so passing a `URL` instance threw `no overload method matched for\nURL.constructor` on QuickJS and a missing-constructor error on ClearScript. Jint already accepted\nit. react-router 8.3.1 resolves every `navigate()` target against `history.createURL('/')`, so every\n`useNavigate` call failed on those two engines. A `URL` base now resolves the same way as its `href`.\n"
-    filename: 2026-11-02-url-object-base.md
+  - content: "---\npackages:\n  npm:@reactunity/renderer:\n    type: minor\n  npm:@reactunity/scripts:\n    type: patch\n---\n\n### The Vite preset has a previewer\n\n`reactUnity()` from `@reactunity/renderer/vite` now serves the previewer at `/previewer/` on the dev\nserver. The previewer is a hosted Unity WebGL player that runs your app in the browser, with no\nEditor open, and Vite's hot reload applies edits to it as you save. The dev server prints its address\nnext to `Local:`. Opening the dev server's root in a browser now redirects there, instead of failing\nwith `Globals is not defined`.\n\nA WebGL build of your own scene in `public/previewer/` is served in its place. Pass\n`previewer: false` to turn the page off.\n\nThe previewer build is new in this release, and the `react-unity-scripts` dev server loads it too.\n"
+    filename: 2026-11-02-vite-previewer.md
     v: 0.0.0
 core:packages:
   - id: npm:@reactunity/monorepo
@@ -10,10 +10,12 @@ core:packages:
   - id: npm:@reactunity/material
     updated: true
   - changelogIds:
-      - 2026-11-02-url-object-base.md
+      - 2026-11-02-vite-previewer.md
     id: npm:@reactunity/renderer
     updated: true
-  - id: npm:@reactunity/scripts
+  - changelogIds:
+      - 2026-11-02-vite-previewer.md
+    id: npm:@reactunity/scripts
     updated: true
 npm:packages:
   - id: npm:@reactunity/monorepo

diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,3 +1,47 @@
+## 0.27.0
+
+### CSS hot updates work with Vite 8.3
+
+`com.reactunity.core`, `com.reactunity.quickjs`
+
+Vite 8.3 skips an unchanged stylesheet by reading `style.textContent` before it writes it, and the
+`<style>` proxy only had a setter. Every CSS hot update failed with `property getter is null` on
+QuickJS and a missing getter on ClearScript, and on Jint the stylesheet was rewritten every time.
+`textContent` and `styleSheet.cssText` now read back the stylesheet text.
+
+On QuickJS, reading any set-only C# property also threw `property getter is null`. It now reads as
+`undefined`, the way a JavaScript accessor without a getter does.
+
+### The Vite preset has a previewer
+
+`@reactunity/renderer`, `@reactunity/scripts`
+
+`reactUnity()` from `@reactunity/renderer/vite` now serves the previewer at `/previewer/` on the dev
+server. The previewer is a hosted Unity WebGL player that runs your app in the browser, with no
+Editor open, and Vite's hot reload applies edits to it as you save. The dev server prints its address
+next to `Local:`. Opening the dev server's root in a browser now redirects there, instead of failing
+with `Globals is not defined`.
+
+A WebGL build of your own scene in `public/previewer/` is served in its place. Pass
+`previewer: false` to turn the page off.
+
+The previewer build is new in this release, and the `react-unity-scripts` dev server loads it too.
+
+### ES modules load on WebGL
+
+`com.reactunity.quickjs`
+
+On WebGL, every `import` failed with an empty `failed to load module graph:` error. The module name
+normalizer called an Emscripten `_memcpy` that Unity's WebGL toolchain does not expose to plugin
+code. With that fixed, three more things a Vite dev server sends now work:
+
+- A top-level name bound by destructuring, such as Vite's `const { HTMLElement = class {} } = globalThis`,
+  is no longer declared a second time as a host global.
+- A host global used only inside a template substitution or a destructuring default is now available
+  to the module.
+- A module can import its own namespace, which Vite 8's React refresh adds to every module. Other
+  circular imports are still refused on WebGL.
+
 ## 0.26.1
 
 ### `new URL(path, base)` accepts a URL object as the base

diff --git a/packages/create/package.json b/packages/create/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@reactunity/create",
-  "version": "0.26.1",
+  "version": "0.27.0",
   "description": "Scaffold a ReactUnity app using npm init",
   "license": "MIT",
   "//type": "ESM, as of the chalk 6 / commander 15 upgrade: both dropped CommonJS. index.ts is emitted next to itself as ESM, so `bin` keeps pointing at index.js.",

diff --git a/packages/create/scaffold/Packages/manifest.json b/packages/create/scaffold/Packages/manifest.json
@@ -1,7 +1,7 @@
 {
   "dependencies": {
-    "com.reactunity.core": "0.26.1",
-    "com.reactunity.quickjs": "0.26.1",
+    "com.reactunity.core": "0.27.0",
+    "com.reactunity.quickjs": "0.27.0",
     "com.unity.ai.navigation": "2.0.14",
     "com.unity.editorcoroutines": "1.1.0",
     "com.unity.ide.visualstudio": "2.0.26",

diff --git a/packages/create/scaffold/react/package.json b/packages/create/scaffold/react/package.json
@@ -10,11 +10,11 @@
     "lint": "react-unity-scripts lint"
   },
   "dependencies": {
-    "@reactunity/renderer": "^0.26.1",
+    "@reactunity/renderer": "^0.27.0",
     "react": "^19.1.0"
   },
   "devDependencies": {
-    "@reactunity/scripts": "^0.26.1",
+    "@reactunity/scripts": "^0.27.0",
     "typescript": "^5.8.3"
   }
 }
diff --git a/packages/material/package.json b/packages/material/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@reactunity/material",
-  "version": "0.26.1",
+  "version": "0.27.0",
   "description": "Material Design components and utilities for React Unity",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

diff --git a/packages/renderer/CHANGELOG.md b/packages/renderer/CHANGELOG.md
@@ -1,3 +1,18 @@
+## @reactunity/renderer@0.27.0
+
+### The Vite preset has a previewer
+
+`reactUnity()` from `@reactunity/renderer/vite` now serves the previewer at `/previewer/` on the dev
+server. The previewer is a hosted Unity WebGL player that runs your app in the browser, with no
+Editor open, and Vite's hot reload applies edits to it as you save. The dev server prints its address
+next to `Local:`. Opening the dev server's root in a browser now redirects there, instead of failing
+with `Globals is not defined`.
+
+A WebGL build of your own scene in `public/previewer/` is served in its place. Pass
+`previewer: false` to turn the page off.
+
+The previewer build is new in this release, and the `react-unity-scripts` dev server loads it too.
+
 ## @reactunity/renderer@0.26.1
 
 ### `new URL(path, base)` accepts a URL object as the base

diff --git a/packages/renderer/package.json b/packages/renderer/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@reactunity/renderer",
-  "version": "0.26.1",
+  "version": "0.27.0",
   "description": "React renderer for Unity3D",
   "types": "dist/index.d.ts",
   "typings": "dist/index.d.ts",

diff --git a/packages/scripts/CHANGELOG.md b/packages/scripts/CHANGELOG.md
@@ -1,3 +1,18 @@
+## @reactunity/scripts@0.27.0
+
+### The Vite preset has a previewer
+
+`reactUnity()` from `@reactunity/renderer/vite` now serves the previewer at `/previewer/` on the dev
+server. The previewer is a hosted Unity WebGL player that runs your app in the browser, with no
+Editor open, and Vite's hot reload applies edits to it as you save. The dev server prints its address
+next to `Local:`. Opening the dev server's root in a browser now redirects there, instead of failing
+with `Globals is not defined`.
+
+A WebGL build of your own scene in `public/previewer/` is served in its place. Pass
+`previewer: false` to turn the page off.
+
+The previewer build is new in this release, and the `react-unity-scripts` dev server loads it too.
+
 ## @reactunity/scripts@0.24.0
 
 ### The browser previewer

diff --git a/packages/scripts/package.json b/packages/scripts/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@reactunity/scripts",
-  "version": "0.26.1",
+  "version": "0.27.0",
   "description": "Configuration and scripts for React Unity.",
   "repository": {
     "type": "git",

diff --git a/unity/clearscript/package.json b/unity/clearscript/package.json
@@ -6,7 +6,7 @@
     "url": "https://github.com/KurtGokhan"
   },
   "displayName": "React Unity ClearScript",
-  "version": "0.26.1",
+  "version": "0.27.0",
   "unity": "2019.4",
   "description": "ClearScript (V8) Plugin for ReactUnity",
   "keywords": ["ReactUnity", "ClearScript", "V8"],

diff --git a/unity/core/package.json b/unity/core/package.json
@@ -6,7 +6,7 @@
     "url": "https://github.com/KurtGokhan"
   },
   "displayName": "React Unity",
-  "version": "0.26.1",
+  "version": "0.27.0",
   "unity": "2021.3",
   "description": "React renderer for Unity",
   "keywords": ["React", "Framework", "UI", "UGUI", "UIToolkit"],

diff --git a/unity/jint/package.json b/unity/jint/package.json
@@ -6,7 +6,7 @@
     "url": "https://github.com/KurtGokhan"
   },
   "displayName": "React Unity Jint",
-  "version": "0.26.1",
+  "version": "0.27.0",
   "unity": "2019.4",
   "description": "Jint Plugin for ReactUnity",
   "keywords": ["ReactUnity", "Jint"],

diff --git a/unity/quickjs/package.json b/unity/quickjs/package.json
@@ -6,7 +6,7 @@
     "url": "https://github.com/KurtGokhan"
   },
   "displayName": "React Unity QuickJS",
-  "version": "0.26.1",
+  "version": "0.27.0",
   "unity": "2019.4",
   "description": "QuickJS Plugin for ReactUnity",
   "keywords": ["ReactUnity", "QuickJS"],