chore(system): add polyfill for Promise.withResolvers #5210

packages/system/src/utils/general.ts

@@ -399,3 +399,22 @@ export function areSetsEqual(a: Set<string>, b: Set<string>) {
 
   return true;
 }
+
+/**
+ * Polyfill for Promise.withResolvers until we can use it in all browsers
+ * @internal
+ */
+export function withResolvers<T>(): {
+  promise: Promise<T>;
+  resolve: (value: T | PromiseLike<T>) => void;
+  reject: (reason?: unknown) => void;
+} {
+  let resolve!: (value: T | PromiseLike<T>) => void;
+  let reject!: (reason?: unknown) => void;
+
+  const promise = new Promise<T>((res, rej) => {
+    resolve = res;
+    reject = rej;
+  });
+  return { promise, resolve, reject };
+}