Function once

src/util.ts:161–171

(fn: Fn)

/** @internal */
export function once<Fn extends (...args: any[]) => any>(fn: Fn) {
  let value: ReturnType<Fn>;
  let ran = false;
  function onceFn(...args: Parameters<Fn>): ReturnType<Fn> {
    if (ran) return value;
    value = fn(...args);
    ran = true;
    return value;
  }
  return onceFn;
}

/** @internal */
export function versionGteLt(