origin
WindowOrWorkerGlobalScope 接口的 origin 只读属性返回全局范围的 origin, 序列化为一个字符串。
Syntax
let myOrigin = self.origin; // or just origin
Value
A USVString.
Examples
Executed from inside a worker script, the following snippet will log the worker's global scope's origin to the console each time it receives a message
js
onmessage = function() {
  console.log(self.origin);
};
If the origin is not a scheme/host/port tuple (say you are trying to run it locally, i.e. via file:// URL), origin will return the string "null".
Specifications
| Specification | 
|---|
| HTML Standard  # dom-origin-dev  | 
Browser compatibility
BCD tables only load in the browser