# GMetri Player
The GMetri Player is a **full-fledged Metaverse application** that can run experiences created using the GMetri editor.
The latest javascript file is hosted [here](https://s.vrgmetri.com/gm-gb-test/gmetri-player/local/web/player.bundle.js). **We recommend you to not self-host this file to receive latest updates from us.**
There are 2 simple steps to get GMetri Player running on your website.
* Drop the below script in the `` section of your web-page
```html
```
* Initialize the Player API by passing the JSON and options
```typescript
// usage
const player = gmetri.player.load({
json: {},
options: {
htmlAnchor: document.body,
onSceneChange: () => {},
onRuleTriggered: () => {},
onViewerStateChange: () => {},
}
}).play();
```
### Player Options
```typescript
type PlayerOptions = {
htmlAnchor?: HTMLElement,
onSceneChange?: () => Promise,
onRuleTriggered?: () => Promise,
onViewerStateChange?: () => Promise,
};
```
1. **htmlAnchor** - Reference to the HTML element you want the player to attach to
2. **onSceneChange** - Optional callback, fired whenever a scene is changed inside the experience
3. **onRuleTriggered** - Optional callback, fired whenever a rule is triggered
4. **onViewerStateChange** - Optional callback, fired whenever the [variables](/metaverse/build/variables.md)' state changes.
### Project JSON
The Player API accepts a [recursive tree structure](https://github.com/gmetrixr/rjson) - codenamed ***rJson***.
This JSON structure can be easily created using our [open source library](https://github.com/gmetrixr/rjson) on GitHub. Feel free to fork it!
To get started on understanding JSON structure, look at the sample jsons added in the github repo [here](https://github.com/gmetrixr/rjson/blob/main/test/r/jsons). rJson library also exports all the helper functions that you can use to create rJson structures. Have a look at the usage [here](https://github.com/gmetrixr/rjson/blob/main/test/r/1.factory.spec.ts)
There's also a codesandbox that showcases the absolute power of creating **Metaverse Apps** using the GMetri Plugin API
{% embed url="" %}
Codesandbox for GMetri SDK
{% endembed %}
---
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