is-media-descriptor 3.2.0

presets:
@media
{

output:

TIP: check out CSS Tree validator opens in a new tab
TIP #2: check out MQ Level 4 draft opens in a new tab

PS. See the source of this page on GitHub opens in a new tab. Vue.js is driving the UI; both Vue and this program are coming as <script>s from jsDelivr.