JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <img src='http://lorempixel.com/400/200/sports/1/' />
</div>
<div>
    <img src='http://lorempixel.com/400/200/sports/2/' />
</div>
<div>
    <img src='http://lorempixel.com/400/200/sports/3/' />
</div>

CSS

.active {
    border: 1px solid red;
}
div{
    padding: 10px 10px 10px 10px;
}

JavaScript

$('img').hover(function () {
    $(this).toggleClass('active');
});
$(document).keypress(function (e) {
    if (e.which == 100) {
        $('.active').remove();
    }
});