diff --git a/src/core/Object3D.ts b/src/core/Object3D.ts
index c49e312..cfffa7d 100644
--- a/src/core/Object3D.ts
+++ b/src/core/Object3D.ts
@@ -1,7 +1,12 @@
 import { Object3D } from 'three'
-import { defineComponent, watch } from 'vue'
+import { ComponentPublicInstance, defineComponent, watch } from 'vue'
 import { bindProp } from '../tools'
 
+interface Object3DInterface {
+  o3d?: Object3D
+  parent?: ComponentPublicInstance
+}
+
 export default defineComponent({
   name: 'Object3D',
   inject: ['three', 'scene', 'renderer'],
@@ -14,55 +19,57 @@ export default defineComponent({
     autoRemove: { type: Boolean, default: true },
     userData: { type: Object, default: () => ({}) },
   },
-  // can't use setup because it will not be used in sub components
-  // setup() {},
+  setup(): Object3DInterface {
+    return {}
+  },
   unmounted() {
     if (this.autoRemove) this.removeFromParent()
   },
   methods: {
     initObject3D(o3d: Object3D) {
       this.o3d = o3d
-      this.o3d.userData = this.userData
-      this.$emit('created', this.o3d)
 
-      bindProp(this, 'position', this.o3d)
-      bindProp(this, 'rotation', this.o3d)
-      bindProp(this, 'scale', this.o3d)
+      o3d.userData = this.userData
+      this.$emit('created', o3d)
+
+      bindProp(this, 'position', o3d)
+      bindProp(this, 'rotation', o3d)
+      bindProp(this, 'scale', o3d)
 
       // TODO : fix lookat.x
-      if (this.lookAt) this.o3d.lookAt(this.lookAt.x, this.lookAt.y, this.lookAt.z)
-      watch(() => this.lookAt, (v) => { this.o3d.lookAt(v.x, v.y, v.z) }, { deep: true })
+      if (this.lookAt) o3d.lookAt(this.lookAt.x, this.lookAt.y, this.lookAt.z)
+      watch(() => this.lookAt, (v) => { o3d.lookAt(v.x, v.y, v.z) }, { deep: true })
 
-      this._parent = this.getParent()
+      this.parent = this.getParent()
       if (this.addToParent()) this.$emit('ready', this)
       else console.error('Missing parent (Scene, Group...)')
     },
-    getParent() {
+    getParent(): undefined | ComponentPublicInstance {
       let parent = this.$parent
       while (parent) {
-        if (parent.add) return parent
+        if ((parent as any).add) return parent
         parent = parent.$parent
       }
-      return false
+      return undefined
     },
-    addToParent(o) {
+    addToParent(o?: Object3D) {
       const o3d = o || this.o3d
-      if (this._parent) {
-        this._parent.add(o3d)
+      if (this.parent) {
+        (this.parent as any).add(o3d)
         return true
       }
       return false
     },
-    removeFromParent(o) {
+    removeFromParent(o?: Object3D) {
       const o3d = o || this.o3d
-      if (this._parent) {
-        this._parent.remove(o3d)
+      if (this.parent) {
+        (this.parent as any).remove(o3d)
         return true
       }
       return false
     },
-    add(o: Object3D) { this.o3d.add(o) },
-    remove(o: Object3D) { this.o3d.remove(o) },
+    add(o: Object3D) { this.o3d?.add(o) },
+    remove(o: Object3D) { this.o3d?.remove(o) },
   },
   render() {
     return this.$slots.default ? this.$slots.default() : []
diff --git a/src/core/OrthographicCamera.ts b/src/core/OrthographicCamera.ts
index e952579..2a3ba42 100644
--- a/src/core/OrthographicCamera.ts
+++ b/src/core/OrthographicCamera.ts
@@ -18,21 +18,20 @@ export default defineComponent({
   },
   setup(props) {
     const camera = new OrthographicCamera(props.left, props.right, props.top, props.bottom, props.near, props.far)
-    return {
-      camera,
-    }
-  },
-  created() {
-    bindProp(this, 'position', this.camera)
+
+    bindProp(this, 'position', camera)
 
     const watchProps = ['left', 'right', 'top', 'bottom', 'near', 'far', 'zoom']
     watchProps.forEach(p => {
-      watch(() => this[p], () => {
-        this.camera[p] = this[p]
-        this.camera.updateProjectionMatrix()
+      watch(() => props[p], (value) => {
+        camera[p] = value
+        camera.updateProjectionMatrix()
       })
     })
 
+    return { camera }
+  },
+  created() {
     this.three.camera = this.camera
   },
   __hmrId: 'OrthographicCamera',
diff --git a/src/core/PerspectiveCamera.ts b/src/core/PerspectiveCamera.ts
index cf2ea18..a0b1f2f 100644
--- a/src/core/PerspectiveCamera.ts
+++ b/src/core/PerspectiveCamera.ts
@@ -16,25 +16,25 @@ export default defineComponent({
     lookAt: { type: Object, default: null },
   },
   setup(props) {
-    return {
-      camera: new PerspectiveCamera(props.fov, props.aspect, props.near, props.far),
-    }
-  },
-  created() {
-    bindProp(this, 'position', this.camera)
+    const camera = new PerspectiveCamera(props.fov, props.aspect, props.near, props.far)
+
+    bindProp(props, 'position', camera)
 
     // TODO : fix lookAt x
-    if (this.lookAt) this.camera.lookAt(this.lookAt.x, this.lookAt.y, this.lookAt.z)
-    watch(() => this.lookAt, (v) => { this.camera.lookAt(v.x, v.y, v.z) }, { deep: true })
+    if (props.lookAt) camera.lookAt(props.lookAt.x, props.lookAt.y, props.lookAt.z)
+    watch(() => props.lookAt, (v) => { camera.lookAt(v.x, v.y, v.z) }, { deep: true })
 
     const watchProps = ['aspect', 'far', 'fov', 'near']
     watchProps.forEach(p => {
-      watch(() => this[p], () => {
-        this.camera[p] = this[p]
-        this.camera.updateProjectionMatrix()
+      watch(() => props[p], (value) => {
+        camera[p] = value
+        camera.updateProjectionMatrix()
       })
     })
 
+    return { camera }
+  },
+  created() {
     this.three.camera = this.camera
   },
   __hmrId: 'PerspectiveCamera',
diff --git a/src/core/Renderer.ts b/src/core/Renderer.ts
index 777ee69..45b78d4 100644
--- a/src/core/Renderer.ts
+++ b/src/core/Renderer.ts
@@ -1,7 +1,12 @@
-import { WebGLRenderer } from 'three'
-import { defineComponent, h } from 'vue'
+import { defineComponent } from 'vue'
 import useThree, { ThreeConfigInterface } from './useThree'
 
+interface RendererEventInterface {
+}
+
+// interface RendererEventListenerInterface {
+// }
+
 export default defineComponent({
   name: 'Renderer',
   props: {
@@ -15,20 +20,38 @@ export default defineComponent({
     width: String,
     height: String,
     xr: Boolean,
+    onReady: Function,
+    onFrame: Function,
   },
-  setup() {
-    const renderer: null | WebGLRenderer = null
-    const _render: {(): void} = () => {}
+  setup(props) {
+    const canvas = document.createElement('canvas')
+    const config: ThreeConfigInterface = {
+      canvas,
+      antialias: props.antialias,
+      alpha: props.alpha,
+      autoClear: props.autoClear,
+      orbitCtrl: props.orbitCtrl,
+      pointer: props.pointer,
+      resize: props.resize,
+    }
+
+    if (props.width) config.width = parseInt(props.width)
+    if (props.height) config.height = parseInt(props.height)
+
+    const three = useThree(config)
+
+    const renderFn: {(): void} = () => {}
 
     const onMountedCallbacks: {(): void}[] = []
     const beforeRenderCallbacks: {(): void}[] = []
     const afterRenderCallbacks: {(): void}[] = []
 
     return {
-      three: useThree(),
-      renderer,
+      canvas,
+      three,
+      renderer: three.renderer,
+      renderFn,
       raf: true,
-      _render,
       onMountedCallbacks,
       beforeRenderCallbacks,
       afterRenderCallbacks,
@@ -41,24 +64,14 @@ export default defineComponent({
     }
   },
   mounted() {
-    const params: ThreeConfigInterface = {
-      canvas: this.$el,
-      antialias: this.antialias,
-      alpha: this.alpha,
-      autoClear: this.autoClear,
-      orbitCtrl: this.orbitCtrl,
-      pointer: this.pointer,
-      resize: this.resize,
-    }
+    // appendChild won't work on reload
+    this.$el.parentNode.insertBefore(this.canvas, this.$el)
 
-    if (this.width) params.width = parseInt(this.width)
-    if (this.height) params.height = parseInt(this.height)
-
-    if (this.three.init(params)) {
-      this.renderer = this.three.renderer
+    if (this.three.init()) {
+      this.onReady?.(this)
       this.renderer.shadowMap.enabled = this.shadow
 
-      this._render = this.three.composer ? this.three.renderC : this.three.render
+      this.renderFn = this.three.composer ? this.three.renderC : this.three.render
 
       if (this.xr) {
         this.renderer.xr.enabled = true
@@ -71,6 +84,7 @@ export default defineComponent({
     this.onMountedCallbacks.forEach(c => c())
   },
   beforeUnmount() {
+    this.canvas.remove()
     this.beforeRenderCallbacks = []
     this.afterRenderCallbacks = []
     this.raf = false
@@ -99,9 +113,11 @@ export default defineComponent({
       this.three.offAfterResize(cb)
     },
     render(time: number) {
-      this.beforeRenderCallbacks.forEach(c => c({ time }))
-      this._render()
-      this.afterRenderCallbacks.forEach(c => c({ time }))
+      const cbParams = { time, renderer: this }
+      this.beforeRenderCallbacks.forEach(cb => cb(cbParams))
+      this.onFrame?.(cbParams)
+      this.renderFn()
+      this.afterRenderCallbacks.forEach(cb => cb(cbParams))
     },
     renderLoop(time: number) {
       if (this.raf) requestAnimationFrame(this.renderLoop)
@@ -109,7 +125,8 @@ export default defineComponent({
     },
   },
   render() {
-    return h('canvas', {}, this.$slots.default ? this.$slots.default() : [])
+    // return h('canvas', {}, this.$slots.default ? this.$slots.default() : [])
+    return this.$slots.default ? this.$slots.default() : []
   },
   __hmrId: 'Renderer',
 })
diff --git a/src/core/Scene.ts b/src/core/Scene.ts
index 855fcb9..ecbc487 100644
--- a/src/core/Scene.ts
+++ b/src/core/Scene.ts
@@ -21,7 +21,7 @@ export default defineComponent({
       scene: this.scene,
     }
   },
-  mounted() {
+  created() {
     if (!this.three.scene) {
       this.three.scene = this.scene
     }
diff --git a/src/core/index.js b/src/core/index.ts
similarity index 100%
rename from src/core/index.js
rename to src/core/index.ts
diff --git a/src/core/useThree.ts b/src/core/useThree.ts
index ad31fce..bed343b 100644
--- a/src/core/useThree.ts
+++ b/src/core/useThree.ts
@@ -1,4 +1,5 @@
 /* eslint-disable @typescript-eslint/no-non-null-assertion */
+import { createRenderer } from '@vue/runtime-core'
 import { Camera, OrthographicCamera, PerspectiveCamera, Scene, WebGLRenderer } from 'three'
 import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js'
 import { EffectComposer } from 'three/examples/jsm/postprocessing/EffectComposer.js'
@@ -27,14 +28,14 @@ export interface SizeInterface {
 
 export interface ThreeInterface {
   conf: ThreeConfigInterface
-  renderer?: WebGLRenderer
+  renderer: WebGLRenderer
+  composer?: EffectComposer
   camera?: Camera
   cameraCtrl?: OrbitControls
   scene?: Scene
   pointer?: PointerInterface
   size: SizeInterface
-  composer?: EffectComposer
-  init(config: ThreeConfigInterface): boolean
+  init(): boolean
   dispose(): void
   render(): void
   renderC(): void
@@ -49,7 +50,7 @@ export interface ThreeInterface {
 /**
  * Three.js helper
  */
-export default function useThree(): ThreeInterface {
+export default function useThree(params: ThreeConfigInterface): ThreeInterface {
   // default conf
   const conf: ThreeConfigInterface = {
     antialias: true,
@@ -62,6 +63,12 @@ export default function useThree(): ThreeInterface {
     height: 150,
   }
 
+  if (params) {
+    Object.entries(params).forEach(([key, value]) => {
+      conf[key] = value
+    })
+  }
+
   // size
   const size: SizeInterface = {
     width: 1, height: 1,
@@ -70,9 +77,6 @@ export default function useThree(): ThreeInterface {
   }
 
   // handlers
-  // const afterInitCallbacks: void[] = []
-  // let afterResizeCallbacks: void[] = []
-  // let beforeRenderCallbacks: void[] = []
   const afterInitCallbacks: {(): void}[] = []
   let afterResizeCallbacks: {(): void}[] = []
   let beforeRenderCallbacks: {(): void}[] = []
@@ -82,6 +86,7 @@ export default function useThree(): ThreeInterface {
   // returned object
   const obj: ThreeInterface = {
     conf,
+    renderer: createRenderer(),
     size,
     init,
     dispose,
@@ -95,16 +100,19 @@ export default function useThree(): ThreeInterface {
 
   return obj
 
+  /**
+   * create WebGLRenderer
+   */
+  function createRenderer(): WebGLRenderer {
+    const renderer = new WebGLRenderer({ canvas: conf.canvas, antialias: conf.antialias, alpha: conf.alpha })
+    renderer.autoClear = conf.autoClear
+    return renderer
+  }
+
   /**
    * init three
    */
-  function init(params: ThreeConfigInterface) {
-    if (params) {
-      Object.entries(params).forEach(([key, value]) => {
-        conf[key] = value
-      })
-    }
-
+  function init() {
     if (!obj.scene) {
       console.error('Missing Scene')
       return false
@@ -115,14 +123,11 @@ export default function useThree(): ThreeInterface {
       return false
     }
 
-    obj.renderer = new WebGLRenderer({ canvas: conf.canvas, antialias: conf.antialias, alpha: conf.alpha })
-    obj.renderer.autoClear = conf.autoClear
-
     if (conf.resize) {
       onResize()
       window.addEventListener('resize', onResize)
-    } else {
-      setSize(conf.width!, conf.height!)
+    } else if (conf.width && conf.height) {
+      setSize(conf.width, conf.height)
     }
 
     initPointer()
@@ -142,6 +147,9 @@ export default function useThree(): ThreeInterface {
     return true
   }
 
+  /**
+   * init pointer
+   */
   function initPointer() {
     let pointerConf: PointerConfigInterface = {
       camera: obj.camera!,