Get Resolvable Sync #2

out/helpers/resolvable.d.ts

@@ -13,6 +13,8 @@ declare class FetchOnce<T, U extends Array<unknown>> {
     constructor(fetchMethod?: ((...args: U) => Promise<T>) | undefined);
     reset(): void;
     resolve(...args: U): Promise<T>;
+    getDataOrUndefined(): T | undefined;
+    getErrorOrUndefined(): unknown | undefined;
     protected isFinished(): boolean;
     protected parsePromise(promise: Promise<T>): void;
 }

out/helpers/resolvable.js

@@ -49,6 +49,12 @@ class FetchOnce {
             }
         });
     }
+    getDataOrUndefined() {
+        return this.data;
+    }
+    getErrorOrUndefined() {
+        return this.error;
+    }
     isFinished() {
         return this.state === ResolvableState.DONE || this.state === ResolvableState.ERROR;
     }