The toString() stringifier method of the MediaList interface returns a string representing the object's values. The value is a comma-separated list of media values in the same format as the MediaList.mediaText property.
toString()None.
A string.
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 (ORIENTATION: LANDSCAPE))");
// erroneously, add the same media query again
mediaList.appendMedium("SCREEN AND (ORIENTATION: LANDSCAPE))");
console.log(mediaList.toString());
// "screen and (140px <= width <= 380px), screen and (orientation: landscape)"