Use below simulation

 
class FakeMinHeap {
 
  constructor() {
    this.data = [];
  }
 
  push(val) {
    this.data.push(val);
    this.data.sort((a, b) => a - b); // Always keep the smallest at index 0
  }
 
  pop() {
    return this.data.shift(); // Removes the smallest
  }
 
  peek() {
    return this.data[0];
  }
 
  size() {
    return this.data.length;
  }
}