Data Structure: Queue

queue.js

class Queue {
  constructor() {
    this.queue = []
  }
  
  get length() {
    return this.queue.length;
  }
  
  enqueue(el) {
    this.queue.push(el)
  }
  
  dequeue() {
    return this.queue.shift()
  }
  
  peek() {
    return this.queue[0]
  }
  
  isEmpty() {
    return this.length === 0;
  }

}