JSFiddle - React, Tailwind, and code Playground

HTML

<p>click to clean up array and remove images from dom</p>

JavaScript

var a = [];
a.push(new Image());
a.push(new Image());
a[0].src = "http://www.palm.com/us/assets/images/products/pads/touchpad/overview-introducing-hpwebos.png";
a[1].src = "http://www.palm.com/us/assets/images/products/pads/touchpad/touchpad-accessories-touchstone.png";

document.body.appendChild(a[0]);
document.body.appendChild(a[1]);

function cleanup() {
    console.log(a);
    document.body.removeChild(a[0]);
    document.body.removeChild(a[1]);
    console.log("Still have references to them so won't be released yet");
    delete a[1];
    delete a[0];
    console.log(a);
}

document.body.onclick = cleanup;