How to compare JavaScript array of objects to get min / max?

To compare JavaScript array of objects to get min / max, we call the Math.min and Math.max methods.

For instance, we write

const myArray = [
  { id: 1, cost: 200 },
  { id: 2, cost: 1000 },
  { id: 3, cost: 50 },
  { id: 4, cost: 500 },
];

const min = Math.min(...myArray.map((item) => item.cost));
const max = Math.max(...myArray.map((item) => item.cost));

to call myArray.map to get the cost property values in an array.

Then we spread the values as arguments of Math.min and Math.max to get the min and max values.