raf refactors

src/common/client-rect-observer.ts

@@ -21,7 +21,7 @@ export class ClientRectObserver {
   #rootRect = this.#root.getBoundingClientRect();
 
   #entries: ClientRectObserverEntry[] = [];
-  #rafId = 0;
+  #rafId = -1;
 
   #callback: ClientRectObserverCallback;
 
@@ -48,19 +48,18 @@ export class ClientRectObserver {
     }
   });
 
-  #appendEntry(entry: ClientRectObserverEntry) {
+  async #appendEntry(entry: ClientRectObserverEntry) {
+    if (this.#entries.length === 0) {
+      Promise.resolve().then(this.#flush);
+    }
+
     // deduplicate the same target
     this.#entries.push(entry);
-
-    if (this.#rafId === 0) {
-      this.#rafId = requestAnimationFrame(this.#flush);
-    }
   }
 
   #flush = () => {
     const entries = this.#entries;
     this.#entries = [];
-    this.#rafId = 0;
     this.#callback(entries, this);
   };
 

src/folk-sand.ts

@@ -9,6 +9,7 @@ import {
   vertexShader,
 } from './folk-sand.glsl.ts';
 import { FolkShape } from './folk-shape.ts';
+import { requestAnimationFrame } from './common/rAF.ts';
 
 export class FolkSand extends HTMLElement {
   static tagName = 'folk-sand';
@@ -88,7 +89,7 @@ export class FolkSand extends HTMLElement {
     this.updateCollisionTexture();
 
     this.attachEventListeners();
-    requestAnimationFrame(this.render.bind(this));
+    this.render();
   }
 
   disconnectedCallback() {
@@ -365,7 +366,7 @@ export class FolkSand extends HTMLElement {
     return false;
   }
 
-  private render(time: number) {
+  private render = (time: number = performance.now()) => {
     if (this.resizeCanvas()) {
       this.processResize();
     }
@@ -378,8 +379,8 @@ export class FolkSand extends HTMLElement {
     this.pointer.prevX = this.pointer.x;
     this.pointer.prevY = this.pointer.y;
 
-    requestAnimationFrame(this.render.bind(this));
-  }
+    requestAnimationFrame(this.render);
+  };
 
   private renderPass(time: number) {
     const gl = this.gl;