Assets / Hot Reloading of Assets

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WebGPU is currently only supported on Chrome starting with version 113, and only on desktop. If they don't work on your configuration, you can check the WebGL2 examples here.
Support for WebGPU in Bevy hasn't been released yet, this example has been compiled using the main branch.

//! Hot reloading allows you to modify assets files to be immediately reloaded while your game is
//! running. This lets you immediately see the results of your changes without restarting the game.
//! This example illustrates hot reloading mesh changes.

use bevy::{asset::ChangeWatcher, prelude::*, utils::Duration};

fn main() {
        .add_plugins(DefaultPlugins.set(AssetPlugin {
            // Tell the asset server to watch for asset changes on disk:
            watch_for_changes: ChangeWatcher::with_delay(Duration::from_millis(200)),
        .add_systems(Startup, setup)

fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
    // Load our mesh:
    let scene_handle = asset_server.load("models/monkey/Monkey.gltf#Scene0");

    // Any changes to the mesh will be reloaded automatically! Try making a change to Monkey.gltf.
    // You should see the changes immediately show up in your app.

    // mesh
    commands.spawn(SceneBundle {
        scene: scene_handle,
    // light
    commands.spawn(PointLightBundle {
        transform: Transform::from_xyz(4.0, 5.0, 4.0),
    // camera
    commands.spawn(Camera3dBundle {
        transform: Transform::from_xyz(2.0, 2.0, 6.0).looking_at(Vec3::ZERO, Vec3::Y),