The MediaList interface represents the media queries of a stylesheet, e.g. those set using a <link> element's media attribute.

MediaList.mediaText

A stringifier that returns a string representing the MediaList as text, and also allows you to set a new MediaList.

MediaList.length Read only

Returns the number of media queries in the MediaList.

MediaList.appendMedium()

Adds a media query to the MediaList.

MediaList.deleteMedium()

Removes a media query from the MediaList.

MediaList.item()

A getter that returns a string representing a media query as text, given the media query's index value inside the MediaList. This method can also be called using the bracket ([]) syntax.

The following would log to the console a textual representation of the MediaList of the first stylesheet applied to the current document.

const stylesheets = document.styleSheets;
let stylesheet = stylesheets[0];
console.log(stylesheet.media.mediaText);