fix: isObserving now requires arg

src/observables.ts

@@ -239,12 +239,10 @@ export function computed<T, R = never>(
 }
 
 /**
- * Whether the current scope is actively observing for any updates.
+ * Whether the given function is actively observing any computations.
  */
-export function isObserving(): boolean {
-  return [currentObserver, ...(currentObserver?.[CHILDREN] ?? [])].some(
-    (node) => node?.[OBSERVING]?.size,
-  );
+export function isObserving(fn: () => void): boolean {
+  return [fn, ...(fn?.[CHILDREN] ?? [])].some((node) => node[OBSERVING]?.size);
 }
 
 /** @deprecated use `isObserving` */

tests/isObserving.test.ts

@@ -1,24 +1,24 @@
-import { effect, isObserving, observable } from '../src';
+import { effect, getScope, isObserving, observable } from '../src';
 
 it('should return true if there are observers', () => {
   const a = observable(0);
 
   effect(() => {
     a();
-    expect(isObserving()).toBeTruthy();
+    expect(isObserving(getScope()!)).toBeTruthy();
   });
 });
 
 it('should return true if child is observing', () => {
   const $a = observable(0);
   effect(() => {
     effect(() => void $a());
-    expect(isObserving()).toBeTruthy();
+    expect(isObserving(getScope()!)).toBeTruthy();
   });
 });
 
 it('should return false if there are _no_ observers', () => {
   effect(() => {
-    expect(isObserving()).toBeFalsy();
+    expect(isObserving(getScope()!)).toBeFalsy();
   });
 });