[v9] experiment: extend factory overload

packages/fiber/src/core/events.ts

@@ -1,7 +1,8 @@
 import * as THREE from 'three'
-import { getRootState, type Properties } from './utils'
+import { getRootState } from './utils'
 import type { Instance } from './reconciler'
 import type { RootState, RootStore } from './store'
+import type { Properties } from '../three-types'
 
 export interface Intersection extends THREE.Intersection {
   /** The event source (the object which registered the handler) */

packages/fiber/src/core/hooks.tsx

@@ -108,8 +108,7 @@ function loadingFn<T>(extensions?: Extensions<T>, onProgress?: (event: ProgressE
           new Promise<LoaderResult<T>>((res, reject) =>
             loader.load(
               input,
-              (data) =>
-                res(data?.scene instanceof THREE.Object3D ? Object.assign(data, buildGraph(data.scene)) : data),
+              (data) => res(data?.scene instanceof THREE.Object3D ? Object.assign(data, buildGraph(data.scene)) : data),
               onProgress,
               (error) => reject(new Error(`Could not load ${input}: ${(error as ErrorEvent)?.message}`)),
             ),

packages/fiber/src/core/reconciler.ts → packages/fiber/src/core/reconciler.tsx

@@ -1,10 +1,12 @@
 import * as THREE from 'three'
+import * as React from 'react'
 import Reconciler from 'react-reconciler'
 import { ContinuousEventPriority, DiscreteEventPriority, DefaultEventPriority } from 'react-reconciler/constants'
 import { unstable_IdlePriority as idlePriority, unstable_scheduleCallback as scheduleCallback } from 'scheduler'
 import { diffProps, applyProps, invalidateInstance, attach, detach, prepare, globalScope, isObject3D } from './utils'
 import type { RootStore } from './store'
 import { removeInteractivity, type EventHandlers } from './events'
+import type { ThreeElement } from '../three-types'
 
 export interface Root {
   fiber: Reconciler.FiberRoot
@@ -14,7 +16,7 @@ export interface Root {
 export type AttachFnType<O = any> = (parent: any, self: O) => () => void
 export type AttachType<O = any> = string | AttachFnType<O>
 
-export type ConstructorRepresentation = new (...args: any[]) => any
+export type ConstructorRepresentation<T = any> = new (...args: any[]) => T
 
 export interface Catalogue {
   [name: string]: ConstructorRepresentation
@@ -69,7 +71,23 @@ interface HostConfig {
 }
 
 export const catalogue: Catalogue = {}
-export const extend = (objects: Partial<Catalogue>): void => void Object.assign(catalogue, objects)
+
+let i = 0
+
+export const extend = <T extends Catalogue | ConstructorRepresentation>(
+  objects: T,
+): T extends ConstructorRepresentation ? React.ExoticComponent<ThreeElement<T>> : void => {
+  if (typeof objects === 'function') {
+    const Component = `${i++}`
+    catalogue[Component] = objects
+
+    // Returns a component whose name will be inferred in devtools
+    // @ts-ignore
+    return React.forwardRef({ [objects.name]: (props, ref) => <Component {...props} ref={ref} /> }[objects.name])
+  } else {
+    return void Object.assign(catalogue, objects) as any
+  }
+}
 
 function createInstance(type: string, props: HostConfig['props'], root: RootStore): HostConfig['instance'] {
   // Get target from catalogue

packages/fiber/src/core/renderer.tsx

@@ -3,7 +3,7 @@ import * as React from 'react'
 import { ConcurrentRoot } from 'react-reconciler/constants'
 import create from 'zustand'
 
-import { ThreeElement } from '../three-types'
+import type { Properties, ThreeElement } from '../three-types'
 import {
   Renderer,
   createStore,
@@ -46,8 +46,6 @@ export const _roots = new Map<Canvas, Root>()
 
 const shallowLoose = { objects: 'shallow', strict: false } as EquConfig
 
-type Properties<T> = Pick<T, { [K in keyof T]: T[K] extends (_: any) => any ? never : K }[keyof T]>
-
 export type GLProps =
   | Renderer
   | ((canvas: Canvas) => Renderer)

packages/fiber/src/core/utils.tsx

@@ -24,11 +24,6 @@ export type ColorManagementRepresentation = { enabled: boolean | never } | { leg
  */
 export const getColorManagement = (): ColorManagementRepresentation | null => (catalogue as any).ColorManagement ?? null
 
-export type NonFunctionKeys<P> = { [K in keyof P]-?: P[K] extends Function ? never : K }[keyof P]
-export type Overwrite<P, O> = Omit<P, NonFunctionKeys<O>> & O
-export type Properties<T> = Pick<T, NonFunctionKeys<T>>
-export type Mutable<P> = { [K in keyof P]: P[K] | Readonly<P[K]> }
-
 export type Act = <T = any>(cb: () => Promise<T>) => Promise<T>
 
 /**

packages/fiber/src/three-types.ts

@@ -1,13 +1,15 @@
 import type * as THREE from 'three'
 import type { Args, EventHandlers, InstanceProps, ConstructorRepresentation } from './core'
-import type { Mutable, Overwrite } from './core/utils'
 
-export { Overwrite }
+type NonFunctionKeys<P> = { [K in keyof P]-?: P[K] extends Function ? never : K }[keyof P]
+export type Overwrite<P, O> = Omit<P, NonFunctionKeys<O>> & O
+export type Properties<T> = Pick<T, NonFunctionKeys<T>>
+export type Mutable<P> = { [K in keyof P]: P[K] | Readonly<P[K]> }
 
-interface MathRepresentation {
+export interface MathRepresentation {
   set(...args: number[]): any
 }
-interface VectorRepresentation extends MathRepresentation {
+export interface VectorRepresentation extends MathRepresentation {
   setScalar(s: number): any
 }
 
@@ -25,20 +27,20 @@ export type Layers = MathType<THREE.Layers>
 export type Quaternion = MathType<THREE.Quaternion>
 export type Euler = MathType<THREE.Euler>
 
-type WithMathProps<P> = { [K in keyof P]: P[K] extends MathRepresentation | THREE.Euler ? MathType<P[K]> : P[K] }
+export type WithMathProps<P> = { [K in keyof P]: P[K] extends MathRepresentation | THREE.Euler ? MathType<P[K]> : P[K] }
 
-interface RaycastableRepresentation {
+export interface RaycastableRepresentation {
   raycast(raycaster: THREE.Raycaster, intersects: THREE.Intersection[]): void
 }
-type EventProps<P> = P extends RaycastableRepresentation ? Partial<EventHandlers> : {}
+export type EventProps<P> = P extends RaycastableRepresentation ? Partial<EventHandlers> : {}
 
 export interface ReactProps<P> {
   children?: React.ReactNode
   ref?: React.Ref<P>
   key?: React.Key
 }
 
-type ElementProps<T extends ConstructorRepresentation, P = InstanceType<T>> = Partial<
+export type ElementProps<T extends ConstructorRepresentation, P = InstanceType<T>> = Partial<
   Overwrite<WithMathProps<P>, ReactProps<P> & EventProps<P>>
 >
 

packages/fiber/tests/__snapshots__/index.test.tsx.snap

@@ -17,9 +17,11 @@ Array [
   "Disposable",
   "DomEvent",
   "Dpr",
+  "ElementProps",
   "Euler",
   "EventHandlers",
   "EventManager",
+  "EventProps",
   "Events",
   "Extensions",
   "FilterFunction",
@@ -40,12 +42,16 @@ Array [
   "Loader",
   "LoaderProto",
   "LoaderResult",
+  "MathRepresentation",
   "MathType",
+  "Mutable",
   "ObjectMap",
   "Overwrite",
   "Performance",
+  "Properties",
   "Props",
   "Quaternion",
+  "RaycastableRepresentation",
   "ReactProps",
   "ReactThreeFiber",
   "ReconcilerRoot",
@@ -67,7 +73,9 @@ Array [
   "Vector2",
   "Vector3",
   "Vector4",
+  "VectorRepresentation",
   "Viewport",
+  "WithMathProps",
   "XRManager",
   "_roots",
   "act",

packages/fiber/tests/renderer.test.tsx

@@ -70,6 +70,12 @@ describe('renderer', () => {
     expect(scene.children.length).toBe(1)
     expect(scene.children[0]).toBeInstanceOf(Mock)
     expect(scene.children[0].name).toBe('mock')
+
+    const Component = extend(THREE.Mesh)
+    await act(async () => root.render(<Component />))
+
+    expect(scene.children.length).toBe(1)
+    expect(scene.children[0]).toBeInstanceOf(THREE.Mesh)
   })
 
   it('should render primitives', async () => {

packages/fiber/tests/utils.test.ts

@@ -1,5 +1,5 @@
 import * as THREE from 'three'
-import { extend, Instance, RootStore, ThreeElement } from '../src'
+import { Instance, RootStore } from '../src'
 import {
   is,
   dispose,
@@ -15,21 +15,6 @@ import {
   updateCamera,
 } from '../src/core/utils'
 
-class TestElement {
-  public value: string
-  constructor() {
-    this.value = 'initial'
-  }
-}
-
-declare module '@react-three/fiber' {
-  interface ThreeElements {
-    testElement: ThreeElement<typeof TestElement>
-  }
-}
-
-extend({ TestElement })
-
 // Mocks a Zustand store
 const storeMock: RootStore = Object.assign(() => null!, {
   getState: () => null!,
@@ -412,7 +397,7 @@ describe('applyProps', () => {
   })
 
   it('should not apply a prop if it is undefined', async () => {
-    const target = new TestElement()
+    const target = { value: 'initial' }
     applyProps(target, { value: undefined })
 
     expect(target.value).toBe('initial')