Sort object in javascript

<!DOCTYPE html>
<html>
<body>

<h2>JavaScript Array Sort</h2>

<p>Click the buttons to sort car objects on age.</p>

<button onclick="myFunction()">Sort</button>

<p id="demo"></p>

<script>
var cars = [
{type:"Volvo", year:2016},
{type:"BMW", year:2001},
{type:"Saab", year:2010}]

displayCars();

function myFunction() {
    cars.sort(function(a, b) {return a.type < b.type});
    displayCars();
}

function displayCars() {
  document.getElementById("demo").innerHTML =
  cars[0].type + " " + cars[0].year + "<br>" +
  cars[1].type + " " + cars[1].year + "<br>" +
  cars[2].type + " " + cars[2].year;
}
</script>

</body>
</html>