WebSocket.url
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2015年7月.
The WebSocket.url read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
**WebSocket.url**是一个只读属性，返回值为当构造函数创建WebSocket实例对象时 URL 的绝对路径。