Function waitFor

async/unstable_wait_for.ts:46–70

(
  predicate: () => boolean | Promise<boolean>,
  ms: number,
  options: WaitForOptions = {},
)

 * ```
 */
export function waitFor(
  predicate: () => boolean | Promise<boolean>,
  ms: number,
  options: WaitForOptions = {},
): Promise<void> {
  const { step = 100 } = options;

  // Create a new promise that resolves when the predicate is true
  let timer: ReturnType<typeof setTimeout>;
  const p: Promise<void> = new Promise(function (resolve) {
    const setTimer = () => {
      timer = setTimeout(async () => {
        if (await predicate()) {
          resolve();
        } else {
          setTimer();
        }
      }, step);
    };
    setTimer();
  });

  // Return a deadline promise
  return deadline(p, ms, options).finally(() => clearTimeout(timer));
}