DOMStringList
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
某些 API 会返回的包含一列DOMString的一种类型
Properties
DOMStringList.length只读-
返回列表的长度，
Methods
DOMStringList.item()-
返回一个
DOMString. DOMStringList.contains()-
返回
Boolean类型的标示来表明此类型是否包含某字符串。