MediaList: метод toString()

toString()

const firstStyleSheet = document.styleSheets[0]; // the document's first stylesheet
const mediaList = firstStyleSheet.media; // the mediaList of the stylesheet

// set the `media` text to a media query value
mediaList.mediaText = "SCREEN AND (140PX <= WIDTH <= 380PX)";

// add a second media value
mediaList.appendMedium(
  "SCREEN AND (MAX-HEIGHT: 400PX) AND (ORIENTATION: LANDSCAPE))",
);

// erroneously, add the same media query again
mediaList.appendMedium(
  "SCREEN AND (MAX-HEIGHT: 400PX) AND (ORIENTATION: LANDSCAPE))",
);

console.log(mediaList.toString());
// "screen and (140px <= width <= 380px), screen and (max-height: 400px) and (orientation: landscape)"