Function debounceAsyncFunc

packages/ethereum-viewer/src/util/func.ts:76–91

(
  func: T,
  wait: number
)

// debounce an async func. once an async func canceled, it throws a exception
export const debounceAsyncFunc = <T extends (...args: any[]) => Promise<any>>(
  func: T,
  wait: number
) => {
  let timer: Timeout | undefined;
  let previousReject: ((reason?: any) => void) | undefined;

  return function f(this: unknown, ...args: Parameters<T>): ReturnType<T> {
    return new Promise((resolve, reject) => {
      timer && clearTimeout(timer);
      previousReject && previousReject();
      timer = setTimeout(() => resolve(func.call(this, ...args)), wait);
      previousReject = reject;
    }) as ReturnType<T>;
  };
};

type Timeout = ReturnType<typeof setTimeout>;