export const isBrowser = typeof document !== 'undefined';

/**
 * 等待某个css 选择器加载出来，要确定这个选择器肯定能加载出来才调用，否则应传入 retryCount
 * @param selector css选择器
 */
export const waitElement = (selector: string, {
  time = 100,
  wrapper = document,
  retryCount = 50,
}: {
  time?: number,
  wrapper?: Document | Element;
  retryCount?: number;
} = {}) => {
  return new Promise((resolve) => {
    if (wrapper.querySelector(selector)) {
      resolve(true);
    } else {
      setTimeout(async () => {
        if (wrapper.querySelector(selector)) {
          resolve(true);
        } else if (!retryCount) {
          resolve(false);
        } else {
          const result = await waitElement(selector, {
            time,
            wrapper,
            retryCount: retryCount - 1
          });
          resolve(result);
        }
      }, time);
    }
  })
}