Preloader - Verge3D User Manual - Soft8Soft
Description: Learn how to use Preloader in your interactive 3D apps made with Verge3D

# Preloader

Base class for Verge3D preloaders.

## Constructor

### Preloader()

Does nothing, should be overridden in the subclass.

## Methods

### # .onFinish()

A callback which is called when the preloader is considered to be complete.

### # .onUpdate(percentage : Float)

A callback which is continuously called during the loading process. The percentage parameter varies from `0` (0%) to `1` (100%).

## Source

The source code for this class is freely available in the `src/extras/Preloader.js` file inside the Verge3D's installation folder.

## See Also

There is a built-in preloader that displays a logo with simple progress bar. See SimplePreloader class for more info.