vanilla javascript fade out

1<div id="target">Click to fade</div>
2<script>
3  function fadeOutEffect() {
4    var fadeTarget = document.getElementById("target");
5    var fadeEffect = setInterval(function () {
6        if (!fadeTarget.style.opacity) {
7            fadeTarget.style.opacity = 1;
8        }
9        if (fadeTarget.style.opacity > 0) {
10            fadeTarget.style.opacity -= 0.1;
11        } else {
12            clearInterval(fadeEffect);
13        }
14    }, 200);
15}
16
17document.getElementById("target").addEventListener('click', fadeOutEffect)
18</script>
19<style>
20  #target {
21    height: 100px;
22    background-color: red;
23}
24</style>