refactor: streamline propagate function by consolidating conditional checks

Author: johnsoncodehk

src/system.ts

@@ -185,39 +185,38 @@ export function propagate(subs: Link): void {
 					}
 				}
 			} else if (subTrackId === -link.trackId) {
-
 				const subDirtyLevel = sub.dirtyLevel;
-				const notDirty = subDirtyLevel === DirtyLevels.None;
 
 				if (subDirtyLevel < dirtyLevel) {
 					sub.dirtyLevel = dirtyLevel;
-				}
-
-				if (notDirty || sub.canPropagate) {
-					if (!notDirty) {
-						sub.canPropagate = false;
-					}
 
-					if ('subs' in sub && sub.subs !== undefined) {
-						sub.depsTail!.nextDep = link;
-						dep = sub;
-						link = sub.subs;
-						if ('notify' in sub) {
-							dirtyLevel = DirtyLevels.SideEffectsOnly;
-						} else {
-							dirtyLevel = DirtyLevels.MaybeDirty;
+					const notDirty = subDirtyLevel === DirtyLevels.None;
+					if (notDirty || sub.canPropagate) {
+						if (!notDirty) {
+							sub.canPropagate = false;
 						}
-						stack++;
 
-						continue;
-					} else if ('notify' in sub) {
-						const queuedEffectsTail = System.queuedEffectsTail;
-						if (queuedEffectsTail !== undefined) {
-							queuedEffectsTail.nextNotify = sub;
-						} else {
-							System.queuedEffects = sub;
+						if ('subs' in sub && sub.subs !== undefined) {
+							sub.depsTail!.nextDep = link;
+							dep = sub;
+							link = sub.subs;
+							if ('notify' in sub) {
+								dirtyLevel = DirtyLevels.SideEffectsOnly;
+							} else {
+								dirtyLevel = DirtyLevels.MaybeDirty;
+							}
+							stack++;
+
+							continue;
+						} else if ('notify' in sub) {
+							const queuedEffectsTail = System.queuedEffectsTail;
+							if (queuedEffectsTail !== undefined) {
+								queuedEffectsTail.nextNotify = sub;
+							} else {
+								System.queuedEffects = sub;
+							}
+							System.queuedEffectsTail = sub;
 						}
-						System.queuedEffectsTail = sub;
 					}
 				}
 			}