queue.js

class Queue {
  constructor (queue = []) {
    this._q = queue
  }
  
  get queue () {
  	return this._q.reverse()
  }
  
  push (key, val) {
    this._q.push({ key, val })
    return this
  }
  
  pop (key) {
    let find
    if (key) {
      const index = this.queue.findIndex(e => e.key === key)
      if (index > -1) {
        find = this.queue[index]
        this._q.splice(index, 1)
        return find.val
      }
      return find
    }
    find = this.queue.pop()
    return find ? find.val : find
  }
}

const que = new Queue()

que.push('/api/v1/url1', 1)
   .push('/api/v1/url2', 2)

console.log(que.pop('/api/v1/url1'))
console.log(que.pop())
console.log(que.pop())
console.log(que.pop())
console.log(que.pop())