JSFiddle - React, Tailwind, and code Playground

HTML

<div id="output">
  
</div>

JavaScript

var group = [
{name: "Jessica", age: 18},
{name: "Josh", age: 21},
{name: "Adam", age: 16},
{name: "Finn", age: 15},
{name: "Amanda", age: 23}];

function filterOutAge(y){
		return y.age > 18;
}

function sortOutUnderAged(ppl){
  return ppl.filter(filterOutAge);
}

function printOut(array) {
	document.getElementById("output").innerHTML += "Congratz " + 	array.name + " you get to party!" + "<br />";
}

sortOutUnderAged(group).forEach(printOut);