The media read-only property of the MediaQueryList interface is a string representing a serialized media query.
A string representing a serialized media query.
This example runs the media query (width <= 600px) and displays the value of the resulting MediaQueryList's media property in a <span>.
let mql = window.matchMedia("(width <= 600px)");
document.querySelector(".mq-value").innerText = mql.media;The JavaScript code passes the media query to match into matchMedia() to compile it, then sets the <span>'s innerText to the value of the result's media property.
<span class="mq-value"></span>A <span> to receive the output.