# unity-webgl
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[](https://github.com/Marinerer/unity-webgl)
[ English | [中文](./README.zh_CN.md) ]
`unity-webgl` provides an easy solution for embedding `Unity WebGL` builds in your web applications, with two-way communication and interaction between your webApp and Unity application with advanced API's.
> 🚨 Reminder
>
> `v4.x` has been updated significantly and the API is not compatible with `v3.x` and earlier versions. For upgrades, please refer to [Changelogs](https://github.com/Marinerer/unity-webgl/wiki/Major-changes-in-v4)
Based on [react-unity-webgl](https://github.com/jeffreylanters/react-unity-webgl)
## Features
- 📦 Easy integration, framework-agnostic
- 📩 Bidirectional communication between WebApp and Unity
- ⏰ Comprehensive event handling mechanism
- 🧲 Built-in Vue components (`vue2/3`)
## Installation
**npm**
```bash
npm install unity-webgl
```
**Browser**
```html
```
## Quick Start
- [Live Demo](https://stackblitz.com/edit/unity-webgl-v4-demo)
- [vue3 Demo](https://stackblitz.com/edit/unity-webgl-v4-vue3-demo)
> [!IMPORTANT]
>
> Communication and interaction with the web application are only possible after the Unity instance is successfully rendered (when the `mounted` event is triggered).
> Recommended to include a loading progress bar when opening the page.
```javascript
import UnityWebgl from 'unity-webgl'
const unityContext = new UnityWebgl('#canvas', {
loaderUrl: 'path/to/unity.loader.js',
dataUrl: 'path/to/unity.data',
frameworkUrl: 'path/to/unity.framework.js',
codeUrl: 'path/to/unity.code',
})
unityContext
.on('progress', (progress) => console.log('Loaded: ', progress))
.on('mounted', () => {
// ⚠️ UnityInstance rendered, ready for communication
unityContext.sendMessage('GameObject', 'ReceiveRole', 'Tanya')
})
// For Unity to call
unityContext.addUnityListener('gameStart', (msg) => {
console.log('from Unity : ', msg)
})
// window.dispatchUnityEvent('gameStart', '{score: 0}')
```
Vue Demo
```html
```
## API
### Constructor
```typescript
new UnityWebgl(canvas: HTMLCanvasElement | string, config?:UnityConfig)
// or
const unityContext = new UnityWebgl(config: UnityConfig)
unityContext.render(canvas: HTMLCanvasElement | string)
```
- `canvas` : Render Unity canvas elements or selectors.
- `config` : Initializes the Unity application's configuration items.
#### config
Initializes the Unity application's configuration items.
| Property | Type | Description | Required |
| ---------------------------- | ----------------- | -------------------------------------------------------------------------------------------------- | -------- |
| `loaderUrl` | string | Unity resource loader file | ✅ |
| `dataUrl` | string | File containing resource data and scenes | ✅ |
| `frameworkUrl` | string | File with runtime and plugin code | ✅ |
| `codeUrl` | string | WebAssembly binary file with native code | ✅ |
| `streamingAssetsUrl` | string | URL for streaming resources | Optional |
| `memoryUrl` | string | URL for generated framework files | Optional |
| `symbolsUrl` | string | URL for generated Unity code files | Optional |
| `workerUrl` | string | URL for generated Unity web worker files | Optional |
| `companyName` | string | Metadata: Company name | Optional |
| `productName` | string | Metadata: Product name | Optional |
| `productVersion` | string | Metadata: Product version | Optional |
| `webglContextAttributes` | object | WebGL rendering context options. @see[WebGLRenderingContext][webglContextAttributes-url] | Optional |
| `devicePixelRatio` | number | Canvas device pixel ratio. @see[devicePixelRatio][devicePixelRatio-url] | Optional |
| `matchWebGLToCanvasSize` | boolean | Disable automatic WebGL canvas size sync. @see[matchWebGLToCanvasSize][matchWebGLToCanvasSize-url] | Optional |
| `autoSyncPersistentDataPath` | boolean | Enables or disables auto synchronization of the persistent data path. | Optional |
| `disabledCanvasEvents` | string[] | Overwrites the default disabled canvas events. | Optional |
| `cacheControl` | `(url) => string` | The Cache Control API | Optional |
[devicePixelRatio-url]: https://developer.mozilla.org/en-US/docs/Web/API/Window/devicePixelRatio
[matchWebGLToCanvasSize-url]: https://issuetracker.unity3d.com/issues/webgl-builds-dont-allow-separate-control-on-canvas-render-buffer-size
[webglContextAttributes-url]: https://developer.mozilla.org/en-US/docs/Web/API/WebGLRenderingContext/getContextAttributes
### Methods
**Instance methods :**
#### ⭐️ `render(canvas: HTMLCanvasElement | string): void;`
Renders UnityInstance into target html canvas element.
- `canvas` : canvas element
```javascript
await unityContext.render('#canvas')
```
#### ⭐️ `unload(): Promise;`
Unload the Unity WebGL instance.
```javascript
await unityContext.unload()
```
#### ⭐️ `sendMessage(objectName: string, methodName: string, value?: any): this;`
Send a message to invoke a public method in the Unity scene.
- `objectName`: Object Name in Unity Scene
- `methodName`: Unity script method name
- `value`: Passed value
```javascript
unityContext.sendMessage('GameObject', 'gameStart', { role: 'Tanya' })
```
#### `requestPointerLock(): void;`
Request pointer lock on the Unity canvas.
#### `takeScreenshot(dataType?: string, quality?: any): string | undefined;`
Capture a screenshot of the Unity canvas.
- `dataType`: Type of image data
- `quality`: Image quality
```javascript
const screenshot = unityContext.takeScreenshot('image/jpeg', 0.92)
```
#### `setFullscreen(enabled: boolean): void;`
Toggle fullscreen mode.
```javascript
unityContext.setFullscreen(true)
```
**Event methods :**
#### `on(name: string, listener: EventListener, options?: { once?: boolean }): this;`
Register for listening events.
```javascript
unityContext.on('progress', (progress) => {
console.log('Progress:', progress)
})
```
#### `off(name: string, listener?: EventListener): this;`
Remove event listener.
```javascript
unityContext.off('progress', listener)
```
**Unity Communication methods :**
#### ⭐️ `addUnityListener(name: string, listener: EventListener, options?: { once?: boolean }): this;`
Register a specific listener for Unity to call.
```javascript
unityContext.addUnityListener('GameStarted', (level) => {
console.log('Game started at level:', level)
})
// then call it in Unity
window.dispatchUnityEvent('GameStarted', 3)
```
#### `removeUnityListener(name: string, listener?: EventListener): this;`
Remove registered listeners.
```javascript
unityContext.removeUnityListener('GameStarted', listener)
```
### ⭐️ `window.dispatchUnityEvent(name: string, ...args: any[])`
The way to dispatch a registered listener on the Unity side. (Calling JS methods in unity)
```javascript
window.dispatchUnityEvent('GameStarted', 3)
```
### Events
| Event Name | Description |
| --------------- | ------------------------------------------------- |
| `beforeMount` | Before rendering UnityInstance to Canvas Element. |
| `mounted` | After rendering UnityInstance to Canvas Element. |
| `beforeUnmount` | Before UnityInstance unload |
| `unmounted` | After UnityInstance unload |
| `progress` | Unity resource loading progress |
| `error` | Error events |
| `debug` | Debug messages from Unity |
## Unity-JavaScript Communication
- [Unity Docs: Interaction with browser scripting](https://docs.unity3d.com/Manual/webgl-interactingwithbrowserscripting.html)
### 1. Call Unity script functions from JavaScript
```javascript
const unityContext = new UnityWebgl()
/**
* @param {string} objectName Name of an object in your scene.
* @param {string} methodName Public method name.
* @param {any} value Passed value.
*/
unityContext.sendMessage('GameObject', 'StartGame', { role: 'Tanya' })
```
### 2. Call JavaScript functions from Unity scripts
1. First register the listener for Unity to call via `addUnityListener` on the web side.
```javascript
unityContext.addUnityListener('gameStart', (level) => {
console.log('Game started at level:', level)
})
```
2. Add the registered `gameStart` method to your Unity project.
```javascript
// javascript_extend.jslib
mergeInto(LibraryManager.library, {
Hello: function () {
window.alert('Hello, world!')
},
GameStart: function (level) {
//window.alert(UTF8ToString(str));
window.dispatchUnityEvent('gameStart', UTF8ToString(level))
},
})
```
3. Call these functions in unity's `C#` scripts:
```csharp
using UnityEngine;
using System.Runtime.InteropServices;
public class WebGLPluginJS : MonoBehaviour
{
[DllImport("__Internal")]
public static extern void Hello();
[DllImport("__Internal")]
public static extern void GameStart(string level);
void Start()
{
Hello();
GameStart("2");
}
}
```
## Issues
- [Keyboard Input and Focus Handling](https://docs.unity3d.com/Manual/webgl-input.html)
- [Debug and troubleshoot Web builds](https://docs.unity3d.com/Manual/webgl-debugging.html)
- [Web performance considerations](https://docs.unity3d.com/Manual/webgl-performance.html)
## Contributing
Contributions are welcome! Please submit a [Pull Request](https://github.com/Marinerer/unity-webgl/pulls).
## License
Apache-2.0 License
## Support
For issues or questions, please file an issue on the [GitHub repository](https://github.com/Marinerer/unity-webgl).