javascript - Programmatically accessing [[Scopes]] (closure variables) through Chrome DevTools API or panel? (Not at breakpoint)

Question

In 2014, it was not possible for JS code to access variables inside a closure from outside the closure. Since then, Chrome's internals have changed to use [[Scopes]] instead of Closure.

Is it now (2018) possible for Chrome DevTools to read [[Scopes]] programmatically? If so, is there an existing DevTools extension that does so?

Use case: inspecting variables inside a UMD module loaded using RequireJS. I know I can do this at a breakpoint or debugger statement using the Scopes panel, but would like to be able to do so even when I am not at a breakpoint.

Edit As of 2017, it was not possible to access [[FunctionLocation]], but I don't know about [[Scopes]].

Attempts

I have investigated the following without success (module factory function name main):

• This comment mentions console.dir(), but there is no programmatic access to the output of console.dir(). I can use console.dir({main}) and then expand the results manually, but not programmatically.

• From the DevTools console, I can use inspect({function}) per this. That gets me closer, but not to [[Scopes]]:

  > var x = inspect({main})
  > x.main.name
  ← "main"
  > x.main[Symbol('Scopes')]
  ← undefined
  > x.main['[[Scopes]]']
  ← undefined
  

• The chrome.devtools.inspectedWindow API provides an eval method that can use inspect. However, I can't get from the inspect results to [[Scopes]], as noted above.

Notes

• Posting a new question rather than bumping the 2014 one as suggested by this Meta answer
• Different from this question because I am trying to access module internals rather than the public module interface

Answer 1

Waitting for answers