GithubOneJS lets you use JavaScript in Unity, for both runtime and editor. It focuses on UI scripting but works for anything you’d usually handle with JS.
Why use OneJSLightning-fast iteration: Change your UI code and see results instantly. No more domain reloads.Familiar tooling: Use TypeScript, React, Tailwind and other web techs you already know and love.Broaden the talent pool: Studios can tap into web devs for UI work.Unity-native: Works directly with UI Toolkit - no browser, no overhead.Fast where it counts: Zero-alloc C# interop, 2D particles, GPU compute, and vector drawing built in.AI-ready: MCP integration lets agents like Claude drive your Unity Editor.Powerful scripting: Give your players the ability to mod your game with TypeScript and React.Desktop and Mobile: Tested on Windows, Mac, iOS, and Android.The core OneJS runtime is open source. This package on the Asset Store gives you exclusive premade themes and Discord perks.
(Familiarity with React and Typescript is recommended)","aiDescription":"","elevatorPitch":"OneJS brings JavaScript and many beloved web techs to Unity, seamlessly integrating with UI Toolkit without the need for a browser or webview.","keyFeatures":"OneJS V3 pairs a purpose-built QuickJS runtime with Unity's UI Toolkit. A custom React 19 reconciler renders JSX straight to VisualElements, and esbuild bundles your TypeScript, Tailwind-style utilities, CSS Modules, and npm packages into a single file. No browser, no DOM, no webview. On WebGL, your bundle runs on the browser's own JS engine at full JIT speed.
Requirements- Unity 6.3+
- Node.js 18+ (development machine only)
PlatformsSupported on Windows, Mac, iOS, and Android
(Tested on Ubuntu by community members as well)","compatibilityInfo":"
OneJS provides scripting capabilities. You can use whichever SRP with it.","customLicense":false,"rating":{"average":5,"count":20,"__typename":"PackageRating"},"currentVersion":{"id":"1502414","name":"3.9.5","publishedDate":"2026-10-03T00:38:12Z","__typename":"ProductVersion"},"reviewCount":20,"downloadSize":"11029936","assetCount":367,"publisher":{"id":"67534","name":"DragonGround","url":"http://onejs.com","supportUrl":"http://onejs.com","supportEmail":"[email protected]","gaAccount":"null","gaPrefix":"null","__typename":"ProductPublisher"},"mainImage":{"big":"//assetstorev1-prd-cdn.unity3d.com/key-image/bd3f62c5-def1-4248-bf42-9197630016da.jpg","facebook":"//assetstorev1-prd-cdn.unity3d.com/key-image/347b5e1c-a43c-4ca7-b44d-4a06882a1a2b.jpg","small":"//assetstorev1-prd-cdn.unity3d.com/key-image/a0c217f8-3c4c-4ea6-92cc-8689654788fa.jpg","icon":"//assetstorev1-prd-cdn.unity3d.com/key-image/6ddef9bf-44f2-4bba-8b1e-754eb1002dcc.png","icon75":"//assetstorev1-prd-cdn.unity3d.com/key-image/ca38998c-2f28-496c-a860-207cd64e2190.png","__typename":"MainImage"},"originalPrice":{"itemId":"277945442626","originalPrice":"69.99","finalPrice":"28.00","isFree":false,"discount":{"save":41.989999999999995,"percentage":59.99,"type":"","saleType":"","__typename":"Discount"},"currency":"USD","entitlementType":"SEAT","__typename":"OfferRating"},"images":[{"type":"vimeo","imageUrl":"https://player.vimeo.com/video/1232010206?app_id=122963","thumbnailUrl":"//assetstorev1-prd-cdn.unity3d.com/package-screenshot/7376a400-05d6-44e6-8dcf-3275f8ff6f5c_thumb.png","__typename":"ProductImage"},{"type":"screenshot","imageUrl":"//assetstorev1-prd-cdn.unity3d.com/package-screenshot/94395808-b849-4b92-b3b1-cc92bfba4d16_scaled.jpg","thumbnailUrl":"//assetstorev1-prd-cdn.unity3d.com/package-screenshot/94395808-b849-4b92-b3b1-cc92bfba4d16_thumb.jpg","__typename":"ProductImage"},{"type":"screenshot","imageUrl":"//assetstorev1-prd-cdn.unity3d.com/package-screenshot/bec881c5-f857-4ea9-adb9-86c1788c3c4f_scaled.jpg","thumbnailUrl":"//assetstorev1-prd-cdn.unity3d.com/package-screenshot/bec881c5-f857-4ea9-adb9-86c1788c3c4f_thumb.jpg","__typename":"ProductImage"},{"type":"screenshot","imageUrl":"//assetstorev1-prd-cdn.unity3d.com/package-screenshot/c5fcdf6e-c78a-4e90-945c-dafe58d2e9ff_scaled.jpg","thumbnailUrl":"//assetstorev1-prd-cdn.unity3d.com/package-screenshot/c5fcdf6e-c78a-4e90-945c-dafe58d2e9ff_thumb.jpg","__typename":"ProductImage"},{"type":"screenshot","imageUrl":"//assetstorev1-prd-cdn.unity3d.com/package-screenshot/ef6d6efd-30c7-49ee-a74e-35770ca33fa5_scaled.jpg","thumbnailUrl":"//assetstorev1-prd-cdn.unity3d.com/package-screenshot/ef6d6efd-30c7-49ee-a74e-35770ca33fa5_thumb.jpg","__typename":"ProductImage"},{"type":"screenshot","imageUrl":"//assetstorev1-prd-cdn.unity3d.com/package-screenshot/fcd9acb9-2236-4c4e-b224-f451c94adf56_scaled.jpg","thumbnailUrl":"//assetstorev1-prd-cdn.unity3d.com/package-screenshot/fcd9acb9-2236-4c4e-b224-f451c94adf56_thumb.jpg","__typename":"ProductImage"},{"type":"screenshot","imageUrl":"//assetstorev1-prd-cdn.unity3d.com/package-screenshot/8302d7cc-ec88-4a9e-bf9d-4e98efb2fc3d_scaled.jpg","thumbnailUrl":"//assetstorev1-prd-cdn.unity3d.com/package-screenshot/8302d7cc-ec88-4a9e-bf9d-4e98efb2fc3d_thumb.jpg","__typename":"ProductImage"},{"type":"screenshot","imageUrl":"//assetstorev1-prd-cdn.unity3d.com/package-screenshot/2169c786-e24e-4de2-b964-df8f1b9b8f2f_scaled.jpg","thumbnailUrl":"//assetstorev1-prd-cdn.unity3d.com/package-screenshot/2169c786-e24e-4de2-b964-df8f1b9b8f2f_thumb.jpg","__typename":"ProductImage"},{"type":"screenshot","imageUrl":"//assetstorev1-prd-cdn.unity3d.com/package-screenshot/861d4e16-3cab-4f73-8439-80360b515cea_scaled.jpg","thumbnailUrl":"//assetstorev1-prd-cdn.unity3d.com/package-screenshot/861d4e16-3cab-4f73-8439-80360b515cea_thumb.jpg","__typename":"ProductImage"}],"category":{"id":"100","name":"GUI","slug":"tools/gui","longName":"Tools/GUI","__typename":"Category"},"firstPublishedDate":"2022-05-16T11:58:20Z","publishNotes":"
# [2026-10-02] v3.9.5Errors now log with their stack and open the line that threw, players ship React's production build, and 3D models load from `.glb` files. The API review's new names arrive beside the old ones, and a new project builds with `onejs-unity build` on `onejs-react` `^0.3.0`, `onejs-ui` `^0.0.6`, `onejs-unity` `^0.10.0` and `ojplay` `^0.10.0`.
Migrating: restart the Editor after updating, since the native library changed. Copy the template's `esbuild.config.mjs` and build scripts, add `onejs-unity/globals` to tsconfig `types`, and delete the copied declarations from `types/global.d.ts`. `fetch` now rejects when no response arrives, so code checking `status === 0` moves to `try`/`catch`. `localStorage` keys live under `onejs:` in PlayerPrefs (old keys move over on first read), so C# reading them adds the prefix. Re-enabling a JSRunner calls `onStop` before `onPlay`. Unhandled promise rejections now log as errors. The API review's new names (`onejs.*`, `useFrame`, `drawing`, `toRGBA`, `open`/`onOpenChange`, `fx.useAnimation`) sit beside the old ones, which keep working.
- JSRunner's Globals are declared for TypeScript in `types/jsrunner.d.ts`, each with its C# type
- Every public global is also under one `onejs` namespace
- `onejs.cs.typeExists` says whether a C# type is loaded
- Unhandled promise rejections log as errors on native platforms
- Errors log with their stack, and a JS error's Console entry opens its source line
- Passing the same function to a C# method twice gives the same delegate, so `RemoveListener(fn)` works
- A C# method call from JS crosses once instead of twice
- `fetch` rejects with a `TypeError` when no response arrives
- `localStorage` keeps to its own `onejs:` keys; `key()`, `length` and `clear()` work
- `localStorage` saves to disk a second after the last write
- `setImmediate` yields to the next frame when an immediate reschedules itself
- Re-enabling a JSRunner calls `onStop` and fires `Reloaded`
- JSPad sets `__isPlaying` and calls `onPlay` and `onStop`
- JSPad ships React's production build and keeps the development build for Play mode in the Editor
- Image fx chains start from a texture you hold
- `QuickJSNative.InteropCallCount` counts JS to C# calls
- 3D models from `.glb` files through glTFast, for ojplay's `useScene` and `useModel`
- Models cast and receive soft shadows under a sun, sky and ground ambient, fog and point lights
- glTF materials keep metallic, roughness, normal, occlusion, emission and alpha
- Models turn on all three axes, scale after spawning and play at their own speed
- A C# static holding null reads as `null` instead of a path proxy
- `releaseObject` works on any C# object
- Timeouts due in the same frame run in due order
- `fetch` sends PATCH and other methods as themselves, with their body
- `Headers` and `URLSearchParams` are iterable; an empty header reads as `\"\"`
- InputBridge reports Input System action phases, so `action.on()` in onejs-unity fires
- Player builds rebuild each app with `NODE_ENV=production`, so players ship React's production build
- An app that does not build fails the player build instead of shipping a stale bundle
- New projects build with `oneJSConfig` and `onejs-unity build`, from onejs-unity 0.10
- New projects type the runtime's globals with `onejs-unity/globals` in tsconfig
- New projects depend on `onejs-react` `^0.3.0`, `onejs-ui` `^0.0.6` and `ojplay` `^0.10.0`
# [2026-10-01] v3.9.4UI Cartridges are now Packs, and a project made before the rename keeps working as it was. A new project's `global.d.ts` types `fetch`, `URL`, `localStorage` and the other web globals the runtime installs.
- UI Cartridges are now Packs: `Pack`, the Packs tab, `__pack()` and `~/@packs/`
- A runner made before the rename keeps extracting to `~/@cartridges/`
- The old names still compile and run, marked obsolete
- Breaking: `CreateInstance<UICartridge>()` returns null; create a `Pack`
- Breaking: editor code reads the list as `\"_packs\"`, and `Pack.Files` holds `PackFileEntry`
- The template's `global.d.ts` declares `fetch`, `URL`, `localStorage`, `AbortController` and the other web globals the runtime installs
- Existing projects: replace `types/global.d.ts` with the package's `Editor/Templates/global.d.ts.txt`, keeping your own additions
Full changelog in the main repo.","supportedUnityVersions":["6000.5.2"],"state":"published","overlay":"","overlayText":"","plusProSale":false,"licenseText":"","vspProperties":{"__typename":""},"__typename":"Product","lighteningRating":{"quantity":0,"type":"time-based","__typename":"LighteningRating"},"lightningMode":"launch","loaded":true,"order":8},"238739":{"id":"238739","lightningMode":"teaser","loaded":false,"order":11},"243593":{"id":"243593","productId":"278305506001","itemId":"278255108425","slug":"world-building-bundle-for-microverse-243593","name":"World Building Bundle for MicroVerse","description":"
OverviewThe World Building Bundle for MicroVerse is a collection of assets that were developed to support your scene creation with MicroVerse.
The bundle is for users who want to get all my MicroVerse related assets at a reduced price.
ImportantThe asset consists of tools and assets to be used with MicroVerse, the bundle does not include MicroVerse itself. Please read the descriptions of the assets of this bundle to get more information about their content.Assets of this BundleThis bundle consists of the following assets, please explore their individual Asset Store descriptions.
