Javascript context url?

Question

URL Handling

Good day!
In the browser, you can choose which url to send the JS code
Screenshot:
Who will tell you? How to programmatically specify the URL to send js code and get the result?

Answer 1

this is the choice of the code execution context in the console.
The feature is exclusively for the console, as you understand, so that you can check several different javascript sources - for example, the main page and the iframe.
And so I don’t really understand what you mean by “sending js code”