first commit

app/utils/promises.ts

@@ -0,0 +1,19 @@
+export function withResolvers<T>(): PromiseWithResolvers<T> {
+  if (typeof Promise.withResolvers === 'function') {
+    return Promise.withResolvers();
+  }
+
+  let resolve!: (value: T | PromiseLike<T>) => void;
+  let reject!: (reason?: any) => void;
+
+  const promise = new Promise<T>((_resolve, _reject) => {
+    resolve = _resolve;
+    reject = _reject;
+  });
+
+  return {
+    resolve,
+    reject,
+    promise,
+  };
+}