diff --git a/studio-frontend/src/app/anim-editor.element.ts b/studio-frontend/src/app/anim-editor.element.ts
index f622a1f..de8c9e2 100644
--- a/studio-frontend/src/app/anim-editor.element.ts
+++ b/studio-frontend/src/app/anim-editor.element.ts
@@ -50,7 +50,7 @@ export class AnimEditorElement extends LitElement {
 
 	@state() keyframes : Record<string, Keyframe> = {};
 
-	@state() selected_track : { track: string } | {outside_entity: string } | false = false;
+	@state() selectedTrack?: { track: string } | { outsideEntity: string };
 
 	trackCount(): number {
 		return Object.keys(this.tracks).length;
@@ -253,8 +253,8 @@ export class AnimEditorElement extends LitElement {
 			track_order_hashed[track] = index;
 		}
 
-		const selected = typeof this.selected_track === "object" && "track" in this.selected_track ? this.selected_track.track : false;
-		const canAddSelected = typeof this.selected_track === "object" && "outside_entity" in this.selected_track ? this.selected_track.outside_entity : false;
+		const selected = !isOutsideEntity(this.selectedTrack) && this.selectedTrack?.track || false;
+		const canAddSelected = isOutsideEntity(this.selectedTrack) && this.selectedTrack.outsideEntity || false;
 
 		let length = this.timelineEnd - this.timelineStart;
 		let clip_start = (this.clipStart - this.timelineStart) / length;
diff --git a/studio/src/anim/timeline_animation.rs b/studio/src/anim/timeline_animation.rs
index c2b5000..e44ad7f 100644
--- a/studio/src/anim/timeline_animation.rs
+++ b/studio/src/anim/timeline_animation.rs
@@ -624,7 +624,7 @@ mod wasm {
 
     export interface UpdateKeyframes extends CustomEvent {
         type: "update-keyframes",
-        details: {
+        detail: {
             added: Record<string, Keyframe>,
             removed: string[]
         }