---
title: "Loader.Events"
docs: "Phaser v3.90.0"
url: https://phaser.io/oss/docs/api-documentation/3.90.0/event/loader-events
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.

# Loader.Events

## ADD


**Description:** The Loader Plugin Add File Event.



This event is dispatched when a new file is successfully added to the Loader and placed into the load queue.



Listen to it from a Scene using: `this.load.on('addfile', listener)`.



If you add lots of files to a Loader from a `preload` method, it will dispatch this event for each one of them.

| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| key | string | No | The unique key of the file that was added to the Loader. |
| type | string | No | The [file type]{@link Phaser.Loader.File#type} string of the file that was added to the Loader, i.e. `image`. |
| loader | [Phaser.Loader.LoaderPlugin](https://phaser.io/oss/docs/api-documentation/3.90.0/class/loader-loaderplugin.md) | No | A reference to the Loader Plugin that dispatched this event. |
| file | [Phaser.Loader.File](https://phaser.io/oss/docs/api-documentation/3.90.0/class/loader-file.md) | No | A reference to the File which was added to the Loader. |

**Member of:** [Phaser.Loader.Events](https://phaser.io/oss/docs/api-documentation/3.90.0/namespace/loader-events.md)
> Source: [src/loader/events/ADD_EVENT.js#L7](https://github.com/phaserjs/phaser/blob/v3.90.0/src/loader/events/ADD_EVENT.js#L7)  
Since: 3.0.0

## COMPLETE


**Description:** The Loader Plugin Complete Event.



This event is dispatched when the Loader has fully processed everything in the load queue.

By this point every loaded file will now be in its associated cache and ready for use.



Listen to it from a Scene using: `this.load.on('complete', listener)`.

| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| loader | [Phaser.Loader.LoaderPlugin](https://phaser.io/oss/docs/api-documentation/3.90.0/class/loader-loaderplugin.md) | No | A reference to the Loader Plugin that dispatched this event. |
| totalComplete | number | No | The total number of files that successfully loaded. |
| totalFailed | number | No | The total number of files that failed to load. |

**Member of:** [Phaser.Loader.Events](https://phaser.io/oss/docs/api-documentation/3.90.0/namespace/loader-events.md)
> Source: [src/loader/events/COMPLETE_EVENT.js#L7](https://github.com/phaserjs/phaser/blob/v3.90.0/src/loader/events/COMPLETE_EVENT.js#L7)  
Since: 3.0.0

## FILE_COMPLETE


**Description:** The File Load Complete Event.



This event is dispatched by the Loader Plugin when _any_ file in the queue finishes loading.



Listen to it from a Scene using: `this.load.on('filecomplete', listener)`.



Make sure you remove this listener when you have finished, or it will continue to fire if the Scene reloads.



You can also listen for the completion of a specific file. See the [FILE_KEY_COMPLETE]{@linkcode Phaser.Loader.Events#event:FILE_KEY_COMPLETE} event.

| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| key | string | No | The key of the file that just loaded and finished processing. |
| type | string | No | The [file type]{@link Phaser.Loader.File#type} of the file that just loaded, i.e. `image`. |
| data | any | Yes | The raw data the file contained. If the file was a multi-file, like an atlas or bitmap font, this parameter will be undefined. |

**Member of:** [Phaser.Loader.Events](https://phaser.io/oss/docs/api-documentation/3.90.0/namespace/loader-events.md)
> Source: [src/loader/events/FILE_COMPLETE_EVENT.js#L7](https://github.com/phaserjs/phaser/blob/v3.90.0/src/loader/events/FILE_COMPLETE_EVENT.js#L7)  
Since: 3.0.0

## FILE_KEY_COMPLETE


**Description:** The File Load Complete Event.



This event is dispatched by the Loader Plugin when any file in the queue finishes loading.



It uses a special dynamic event name constructed from the key and type of the file.



For example, if you have loaded an `image` with a key of `monster`, you can listen for it

using the following:



```javascript

this.load.on('filecomplete-image-monster', function (key, type, data) {

    // Your handler code

});

```



Or, if you have loaded a texture `atlas` with a key of `Level1`:



```javascript

this.load.on('filecomplete-atlasjson-Level1', function (key, type, data) {

    // Your handler code

});

```



Or, if you have loaded a sprite sheet with a key of `Explosion` and a prefix of `GAMEOVER`:



```javascript

this.load.on('filecomplete-spritesheet-GAMEOVERExplosion', function (key, type, data) {

    // Your handler code

});

```



Make sure you remove your listeners when you have finished, or they will continue to fire if the Scene reloads.



You can also listen for the generic completion of files. See the [FILE_COMPLETE]{@linkcode Phaser.Loader.Events#event:FILE_COMPLETE} event.

| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| key | string | No | The key of the file that just loaded and finished processing. |
| type | string | No | The [file type]{@link Phaser.Loader.File#type} of the file that just loaded, i.e. `image`. |
| data | any | Yes | The raw data the file contained. If the file was a multi-file, like an atlas or bitmap font, this parameter will be undefined. |

**Member of:** [Phaser.Loader.Events](https://phaser.io/oss/docs/api-documentation/3.90.0/namespace/loader-events.md)
> Source: [src/loader/events/FILE_KEY_COMPLETE_EVENT.js#L7](https://github.com/phaserjs/phaser/blob/v3.90.0/src/loader/events/FILE_KEY_COMPLETE_EVENT.js#L7)  
Since: 3.0.0

## FILE_LOAD_ERROR


**Description:** The File Load Error Event.



This event is dispatched by the Loader Plugin when a file fails to load.



Listen to it from a Scene using: `this.load.on('loaderror', listener)`.

| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| file | [Phaser.Loader.File](https://phaser.io/oss/docs/api-documentation/3.90.0/class/loader-file.md) | No | A reference to the File which errored during load. |

**Member of:** [Phaser.Loader.Events](https://phaser.io/oss/docs/api-documentation/3.90.0/namespace/loader-events.md)
> Source: [src/loader/events/FILE_LOAD_ERROR_EVENT.js#L7](https://github.com/phaserjs/phaser/blob/v3.90.0/src/loader/events/FILE_LOAD_ERROR_EVENT.js#L7)  
Since: 3.0.0

## FILE_LOAD


**Description:** The File Load Event.



This event is dispatched by the Loader Plugin when a file finishes loading,

but _before_ it is processed and added to the internal Phaser caches.



Listen to it from a Scene using: `this.load.on('load', listener)`.

| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| file | [Phaser.Loader.File](https://phaser.io/oss/docs/api-documentation/3.90.0/class/loader-file.md) | No | A reference to the File which just finished loading. |

**Member of:** [Phaser.Loader.Events](https://phaser.io/oss/docs/api-documentation/3.90.0/namespace/loader-events.md)
> Source: [src/loader/events/FILE_LOAD_EVENT.js#L7](https://github.com/phaserjs/phaser/blob/v3.90.0/src/loader/events/FILE_LOAD_EVENT.js#L7)  
Since: 3.0.0

## FILE_PROGRESS


**Description:** The File Load Progress Event.



This event is dispatched by the Loader Plugin during the load of a file, if the browser receives a DOM ProgressEvent and

the `lengthComputable` event property is true. Depending on the size of the file and browser in use, this may, or may not happen.



Listen to it from a Scene using: `this.load.on('fileprogress', listener)`.

| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| file | [Phaser.Loader.File](https://phaser.io/oss/docs/api-documentation/3.90.0/class/loader-file.md) | No | A reference to the File which errored during load. |
| percentComplete | number | No | A value between 0 and 1 indicating how 'complete' this file is. |

**Member of:** [Phaser.Loader.Events](https://phaser.io/oss/docs/api-documentation/3.90.0/namespace/loader-events.md)
> Source: [src/loader/events/FILE_PROGRESS_EVENT.js#L7](https://github.com/phaserjs/phaser/blob/v3.90.0/src/loader/events/FILE_PROGRESS_EVENT.js#L7)  
Since: 3.0.0

## POST_PROCESS


**Description:** The Loader Plugin Post Process Event.



This event is dispatched by the Loader Plugin when the Loader has finished loading everything in the load queue.

It is dispatched before the internal lists are cleared and each File is destroyed.



Use this hook to perform any last minute processing of files that can only happen once the

Loader has completed, but prior to it emitting the `complete` event.



Listen to it from a Scene using: `this.load.on('postprocess', listener)`.

| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| loader | [Phaser.Loader.LoaderPlugin](https://phaser.io/oss/docs/api-documentation/3.90.0/class/loader-loaderplugin.md) | No | A reference to the Loader Plugin that dispatched this event. |

**Member of:** [Phaser.Loader.Events](https://phaser.io/oss/docs/api-documentation/3.90.0/namespace/loader-events.md)
> Source: [src/loader/events/POST_PROCESS_EVENT.js#L7](https://github.com/phaserjs/phaser/blob/v3.90.0/src/loader/events/POST_PROCESS_EVENT.js#L7)  
Since: 3.0.0

## PROGRESS


**Description:** The Loader Plugin Progress Event.



This event is dispatched when the Loader updates its load progress, typically as a result of a file having completed loading.



Listen to it from a Scene using: `this.load.on('progress', listener)`.

| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| progress | number | No | The current progress of the load. A value between 0 and 1. |

**Member of:** [Phaser.Loader.Events](https://phaser.io/oss/docs/api-documentation/3.90.0/namespace/loader-events.md)
> Source: [src/loader/events/PROGRESS_EVENT.js#L7](https://github.com/phaserjs/phaser/blob/v3.90.0/src/loader/events/PROGRESS_EVENT.js#L7)  
Since: 3.0.0

## START


**Description:** The Loader Plugin Start Event.



This event is dispatched when the Loader starts running. At this point load progress is zero.



This event is dispatched even if there aren't any files in the load queue.



Listen to it from a Scene using: `this.load.on('start', listener)`.

| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| loader | [Phaser.Loader.LoaderPlugin](https://phaser.io/oss/docs/api-documentation/3.90.0/class/loader-loaderplugin.md) | No | A reference to the Loader Plugin that dispatched this event. |

**Member of:** [Phaser.Loader.Events](https://phaser.io/oss/docs/api-documentation/3.90.0/namespace/loader-events.md)
> Source: [src/loader/events/START_EVENT.js#L7](https://github.com/phaserjs/phaser/blob/v3.90.0/src/loader/events/START_EVENT.js#L7)  
Since: 3.0.0

---

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