MediaList: toString() 方法
MediaList 介面的 toString() 字串轉換器 方法返回一個表示該物件值的字串。該值是以與 MediaList.mediaText 屬性相同的格式逗號分隔的媒體值列表。
語法
js
toString()
引數
無。
返回值
字串。
示例
js
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)"
規範
| 規範 |
|---|
| CSS 物件模型 (CSSOM) # MediaList-stringification-behavior |
瀏覽器相容性
載入中…