Bug 50063 – [v8] Web Inspector: display name of an object constructor as the object's type

• Status: RESOLVED
• Resolution: FIXED
• Component: Web Inspector (Deprecated)

[Yury Semikhatsky]

Chrome's web inspector shows somewhat misleading "representation" of an object. Run this in web inspector's console:

function Parent(){} 
function Child(){} 
Child.prototype = new Parent;
new Child; // displayed as "Parent", instead of expected "Child"

It looks like object representation is the result of evaluating non-standard "name" property of object's constructor (or something similar to that). Once `Child.prototype.constructor` is set to reference `Child`, object is represented as "Child".

Would it be possible to change this behavior, so that `new Child` is represented as "Child" without setting `Child.prototype.constructor` to `Child`? (the latter is not always possible when working with 3rd party code)

Original Chromium bug: http://code.google.com/p/chromium/issues/detail?id=63383

[Yury Semikhatsky]

Created attachment 74869 [details]
Patch

[anton muhin]

Comment on attachment 74869 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=74869&action=review

> WebCore/inspector/front-end/InjectedScript.js:432
> +                // In Chromium DOM wrapper prototypes will have Object as their construcor name,

nit: construc[t]or

[Yury Semikhatsky]

Created attachment 74871 [details]
Patch

[Yury Semikhatsky]

(In reply to comment #2)
> (From update of attachment 74869 [details])
> View in context: https://bugs.webkit.org/attachment.cgi?id=74869&action=review
> 
> > WebCore/inspector/front-end/InjectedScript.js:432
> > +                // In Chromium DOM wrapper prototypes will have Object as their construcor name,
> 
> nit: construc[t]or

Fixed.

[Pavel Feldman]

Comment on attachment 74871 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=74871&action=review

Please do renaming prior to landing.

> WebCore/inspector/InjectedScriptHost.idl:41
> +        [Custom] DOMObject constructorName(in DOMObject object);

internalConstructorName?

> WebCore/inspector/front-end/InjectedScript.js:431
> +            if (result === "Object") {

If constructorName is Object, then we use constructor name?

[Eric Seidel (no email)]

Attachment 74871 [details] did not build on chromium:
Build output: http://queues.webkit.org/results/6391041

[Yury Semikhatsky]

Created attachment 74879 [details]
Patch

[Yury Semikhatsky]

(In reply to comment #5)
> (From update of attachment 74871 [details])
> View in context: https://bugs.webkit.org/attachment.cgi?id=74871&action=review
> 
> Please do renaming prior to landing.
> 
> > WebCore/inspector/InjectedScriptHost.idl:41
> > +        [Custom] DOMObject constructorName(in DOMObject object);
> 
> internalConstructorName?
> 
Done.

[Eric Seidel (no email)]

Attachment 74879 [details] did not build on chromium:
Build output: http://queues.webkit.org/results/6314046

[WebKit Review Bot]

Attachment 74879 [details] did not build on chromium:
Build output: http://queues.webkit.org/results/6410092

[Yury Semikhatsky]

Committed r72800