[WV2] Fix bug where play/pause button shows even after anims removed

app/assets/javascripts/outfit-viewer.js

@@ -8,7 +8,31 @@ class OutfitViewer extends HTMLElement {
 	}
 
 	connectedCallback() {
-		// Set up listener for bubbled hasanimationschange events from layers
+		const observer = new MutationObserver((mutations) => {
+			// When a layer is added, update its playing state to match ours.
+			const addedLayers = mutations
+				.flatMap(m => [...m.addedNodes])
+				.filter(n => n.tagName === "OUTFIT-LAYER");
+			for (const layer of addedLayers) {
+				if (this.#internals.states.has("playing")) {
+					layer.play();
+				} else {
+					layer.pause();
+				}
+			}
+
+			const removedLayers = mutations
+				.flatMap(m => [...m.removedNodes])
+				.filter(n => n.tagName === "OUTFIT-LAYER");
+
+			// If any layers were added or removed, updated our hasAnimations state.
+			if (addedLayers.length > 0 || removedLayers.length > 0) {
+				this.#updateHasAnimations();
+			}
+		});
+		observer.observe(this, { childList: true });
+
+		// When a new layer finishes loading and determines it has animations, update.
 		this.addEventListener("hasanimationschange", (e) => {
 			// Only handle events from outfit-layer children, not from ourselves
 			if (e.target === this) return;
@@ -16,23 +40,6 @@ class OutfitViewer extends HTMLElement {
 			this.#updateHasAnimations();
 		});
 
-		// Watch for new layers being added and apply the current playing state
-		const observer = new MutationObserver((mutations) => {
-			for (const mutation of mutations) {
-				for (const node of mutation.addedNodes) {
-					if (node.tagName === "OUTFIT-LAYER") {
-						// Apply current playing state to the new layer
-						if (this.#internals.states.has("playing")) {
-							node.play();
-						} else {
-							node.pause();
-						}
-					}
-				}
-			}
-		});
-		observer.observe(this, { childList: true });
-
 		// The `<outfit-layer>` is connected to the DOM right before its
 		// children are. So, to engage with the children, wait a tick!
 		setTimeout(() => this.#connectToChildren(), 0);