Problem 10/30 of LeetCode 30-day challenge

MinStack.js

class MinStack {
  constructor() {
    this.items = [];
  }
  
  push(item) {
    this.items.push(item);
  }
  
  pop() {
    this.items.pop();
  }
  
  top() {
    return this.items[this.items.length-1];
  }
  
  getMin() {
    let min = this.items[0];
    for(let i = 1; i< this.items.length; i++) {
      let item = this.items[i];
      if(item < min) {
        min = item;
      }
    }
    return min;
  }
}