StyleSheet：title 属性
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2015.
StyleSheet 接口的 title 属性返回当前样式表的咨询标题。
标题通常在 ownerNode 中指定。
规范
| Specification |
|---|
| CSS Object Model (CSSOM) # dom-stylesheet-title |