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<b>Warning</b>:  session_start(): Session cannot be started after headers have already been sent in <b>/home/tvrreohg/public_html/manga.php</b> on line <b>13</b><br />
﻿// @flow

export default function debounce<T>(fn: Function): () => Promise<T> {
  let pending;
  return () => {
    if (!pending) {
      pending = new Promise<T>(resolve => {
        Promise.resolve().then(() => {
          pending = undefined;
          resolve(fn());
        });
      });
    }

    return pending;
  };
}