Polyfill AbortSignal.any and AbortSignal.timeout for React Native

Author: steida

packages/common/src/Task.ts

@@ -216,6 +216,32 @@ const isAbortError = (error: unknown): error is AbortError =>
   error !== null &&
   (error as { type?: unknown }).type === "AbortError";
 
+// For React Native
+if (typeof AbortSignal.any !== "function") {
+  AbortSignal.any = function (signals: Array<AbortSignal>): AbortSignal {
+    const controller = new AbortController();
+
+    const onAbort = (event: Event) => {
+      controller.abort((event.target as AbortSignal).reason);
+      cleanup();
+    };
+
+    const cleanup = () => {
+      for (const s of signals) s.removeEventListener("abort", onAbort);
+    };
+
+    for (const s of signals) {
+      if (s.aborted) {
+        controller.abort(s.reason);
+        return controller.signal;
+      }
+      s.addEventListener("abort", onAbort);
+    }
+
+    return controller.signal;
+  };
+}
+
 /**
  * Combines user signal from context with an internal signal.
  *
@@ -304,6 +330,21 @@ export const toTask = <T, E>(
     ]);
   }) as Task<T, E>;
 
+// For React Native
+if (typeof AbortSignal.timeout !== "function") {
+  AbortSignal.timeout = function (ms: number): AbortSignal {
+    const controller = new AbortController();
+    const id = setTimeout(() => {
+      controller.abort();
+    }, ms);
+    // clear timeout if aborted early
+    controller.signal.addEventListener("abort", () => {
+      clearTimeout(id);
+    });
+    return controller.signal;
+  };
+}
+
 /**
  * Creates a {@link Task} that waits for the specified duration.
  *