1164213 - Reimplement the Closure Inspector (aka ".%")

Status: NEW

(DevTools :: Console, enhancement, P3)

Description

[Florent Fayolle]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Firefox/38.0
Build ID: 20150508094354

Steps to reproduce:

See http://getfirebug.com/wiki/index.php/Closure_Inspector

The Closure Inspector feature in Firebug proposes a special syntax: ".%" to access a closure variable. Obviously, it is not standard, but it is quite convenient.

Florent

Comment 1

[Sylvestre Ledru [:Sylvestre]]

Does it still occur? Thanks

Comment 2

[Florent Fayolle]

Yep :

>>> function foo() {
      const a = 42;
      return function () {
        return a;
      }
    }

>>> foo().%a
SyntaxError: missing name after . operator[En savoir plus]

Should rather display:
>>> foo().%a
42



Florent

Comment 3

[Sylvestre Ledru [:Sylvestre]]

OK, merci Florent!

Nicolas, can you help with that? Thanks

Comment 4

[Nicolas Chevobbe [:nchevobbe]]

Not sure we'd implement this with this non-standard syntax.
We already have Bug 1443848 to have a `<closure>` node in the ObjectInspector.
We might offer something in the autocomplete popup to get access to the closure.