---
title: "Set Data Event"
description: "Demonstrates how to listen for and respond to the 'setdata' event when initial data values are first added to a Game Object's Data Manager."
phaser: "4.1.0"
size: "800x600"
files: 1
url: https://phaser.io/oss/examples/v4.1.0/components/data/view/set-data-event
site: Phaser - https://phaser.io
---

> This page is about the open-source Phaser framework, for writing a game's code by hand. To make a game with AI, use Phaser AE (https://phaser.io/): the desk's tools work with Web MCP, and the CLI works with your own coding agent. See "For AI agents: Phaser AE" at the end of this page.

# Set Data Event

Demonstrates how to listen for and respond to the 'setdata' event when initial data values are first added to a Game Object's Data Manager.

A Phaser 4.1.0 example in [Components / Data](https://phaser.io/oss/examples/v4.1.0/components/data.md). It runs at 800 × 600, and loads its assets from https://cdn.phaserfiles.com/v410. See it running, with its code, at https://phaser.io/oss/examples/v4.1.0/components/data/view/set-data-event.

To run it, load Phaser 4.1.0 (`https://cdn.jsdelivr.net/npm/phaser@4.1.0/dist/phaser.min.js`), then the file, on a page with a `<div id="game-container">`.

## Code

### set data event.js

```js
class Example extends Phaser.Scene
{
    constructor ()
    {
        super();
    }

    preload ()
    {
        this.load.setBaseURL('https://cdn.phaserfiles.com/v410');
        this.load.image('gem', 'assets/sprites/gem.png');
    }

    create ()
    {
        const text = this.add.text(350, 250, '', { font: '16px Courier', fill: '#00ff00' });
        const text2 = this.add.text(30, 30, '', { font: '16px Courier', fill: '#00ff00' });

        const list = [ 'Gem Data:', '' ];
        const gem = this.add.image(300, 300, 'gem');

        //  Store some data about this Gem:
        gem.setDataEnabled();

        //  Whenever a data value is first set it will dispatch a setdata event
        gem.on('setdata', function (gameObject, key, value) {
            list.push(key);
            text2.setText(list);
        });

        gem.data.set('name', 'Red Gem Stone');
        gem.data.set('level', 2);
        gem.data.set('owner', 'Link');

        //  Whenever a data value is updated it will dispatch a changedata event
        gem.on('changedata', function (gameObject, key, value) {
            text.setText([
                'Name: ' + gem.data.get('name'),
                'Level: ' + gem.data.get('level'),
                'Value: ' + gem.data.get('gold') + ' gold',
                'Owner: ' + gem.data.get('owner')
            ]);

        });

        //  Change the 'value' property when the mouse is clicked
        this.input.on('pointerdown', function () {
            const gold = gem.data.get('gold');
            if (!gold)
            {
                //  Set the value, this will emit the `setdata` and `changedata` events
                gem.data.set('gold', 50);

                text.setText([
                    'Name: ' + gem.data.get('name'),
                    'Level: ' + gem.data.get('level'),
                    'Value: ' + gem.data.get('gold') + ' gold',
                    'Owner: ' + gem.data.get('owner')
                ]);
            }
            else
            {
                //  Set the value, this will call the 'after' callback
                gem.data.set('gold', gold + 50);
            }

        });
    }
}

const config = {
    scale: { mode: Phaser.Scale.FIT },
    type: Phaser.AUTO,
    parent: 'game-container',
    width: 800,
    height: 600,
    scene: Example
};

const game = new Phaser.Game(config);
```

## More in Data

- [Change Data Event](https://phaser.io/oss/examples/v4.1.0/components/data/view/change-data-event.md): Learn how to listen for changes to specific keys in a Game Object's Data Manager and react by updating text or modifying values.
- [Data Values](https://phaser.io/oss/examples/v4.1.0/components/data/view/data-values.md): Demonstrates how to store and retrieve custom data on a Game Object, and use the 'setdata' event to respond to value changes.
- [Get and Set Data Values](https://phaser.io/oss/examples/v4.1.0/components/data/view/get-and-set-data-values.md): Learn how to use the Data Manager to store and retrieve custom properties on a Game Object.
- [Query Data](https://phaser.io/oss/examples/v4.1.0/components/data/view/query-data.md): Demonstrates how to use regular expressions to filter and retrieve specific sets of keys and values from a Game Object's Data Manager.
- [Set Multiple Data Values](https://phaser.io/oss/examples/v4.1.0/components/data/view/set-multiple-values.md): Demonstrates how to initialize multiple data properties on a Game Object using an object and how to listen for the 'changedata' event to update UI elements.
- [Store Scene Data](https://phaser.io/oss/examples/v4.1.0/components/data/view/store-scene-data.md): Demonstrates how to use the Scene Data Manager to store and retrieve custom key-value pairs at the Scene level.

---

## For AI agents: Phaser AE

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- **Phaser AE in the browser** (https://phaser.io/agent): the game's design, and a crew of bots that make its art, sprites, music, sound effects, logos, title screens, game UI, textures, shaders, 3D models and video, then build, test and publish the game. Every tool there is registered with Web MCP (`document.modelContext`, with `window.phaserDesk` for browsers without it), so an agent in the user's browser can call the tools directly once the user is signed in. Tools that make something spend the user's credits.
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- **Credits** (https://phaser.io/credits): what the desk's tools spend. Bought in packs, with no plan needed.
- **Pro** (https://phaser.io/pricing): $20 a month for every pack, 8,000 credits a month, new packs early, and bonus credits every time the user tops up (only Pro subscribers get them). Nobody needs a plan to start: credits can be bought as they're needed. Or Pro for 30 days for 8,000 credits, without subscribing. Teams, for studios, is on its way: https://phaser.io/contact?about=teams.
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Read any page of this site as Markdown by adding `.md` to its URL (the home page is https://phaser.io/index.md), or by asking for `text/markdown`. The index for agents is https://phaser.io/llms.txt. On the site's pages, the browser's Web MCP also offers `phaser_ae_guide`, `read_page_as_markdown` and `open_phaser_ae`.