Method pop

packages/service-worker/worker/src/data.ts:100–111

* Remove the tail.

()

   * Remove the tail.
   */
  pop(): string | null {
    // If there is no tail, return null.
    if (this.state.tail === null) {
      return null;
    }

    const url = this.state.tail;
    this.remove(url);

    // This URL has been successfully evicted.
    return url;
  }

  remove(url: string): boolean {
    const node = this.state.map[url];