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Re: Checking Loading Status of Cross-Domain Child Window

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Win User schrieb:

> this is part of a job application process, in which
> the employer is challenges applicants to make changes using only Javascript
> (no changes to markup), and then appears to want to know how the applicant
> handles a cross-domain child window problem.  See for yourself:  the
> challenge is at the bottom of the page:
>
>      http://sacramento.craigslist.org/sof/4562251797.html

I think you misunderstood the requirements they gave. Citing them:

| *Javascript Test:*
|
| Using http://www.blastam.com/analytics-consulting.aspx as your source 
| page, write javascript that would accomplish the following:
| * Hide the Print | Email | Share div in the right column of the page.
| * Change the Blast AM logo at the top left to:
|   1) Link to http://www.google.com instead of /.
|   2) Have it open in a new window when clicked.
|   3) Fire an alert dialog that says the following when clicked:
|      Please Hire Me!
| * Change the 'Consulting By Platform' H3 element to all uppercase.
|
| […]
| We will test by executing your script in console on the URL above, so
| we recommend you test your script the same way. It is probably
| easiest to write your JavaScript in console as well versus attempting
| to setup a local or hosted copy of our page.

> There is only one thing I have NOT been able to figure out.  I am
> required to open a child window and load it with the content

Not exaclty. You don't have to open it by JS, you just need make the 
link open in a new window. (using the target attribute, probably)

> "http://www.google.com" (yes, not "http://www.google.com/")

No. They just want you to change the link, which is currently "/" 
(inspect the page they gave!), to the google site. It's quite impossible 
to prevent Google from redirecting you to where they want once you've 
entered their URL.

 > and then I am supposed to call an alert.
>
> It seems logical to write client code that determines the completion of
> the loading status of the child window.

I don't think so. Just fire an alert when the link was clicked, you 
don't need to wait for the window to load.

> My search of the network shows code setting up time interval for
> polling the document's readyState property as "complete."  But that
> only works on same- origin (same domain) content.  Cross-domain
> attempts trigger an error.

Yes, that's enforced by the same-origin-policy, and that's good.

> And then there's the problem of opening an alert in front the child
> window: if 'childWin' is the window object, the call childWin.alert()
> triggers an error.

I don't think you're supposed to open the the alert in the child window. 
If you have problems with the child window opening in front of you, just 
re-focus the parent page. Search for "pop-under" for various techniques 
to achieve that, especially in the presence of a popup blocker.

> Is there/are there solutions?

No. If you could open an alert on google's homepage, that would 
seriously pervert the same-origin-policy and be a large security issue. 
Of course, that employeer being an analytics enterprise they would 
probably be glad if you were a hacker that can find holes in the SOP. 
However, this is not what this trivial "test" is about.

Kind regards,
  Bergi

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Thread

Checking Loading Status of Cross-Domain Child Window Win User <winuser@ms.invalid> - 2014-07-24 15:42 +0000
  Re: Checking Loading Status of Cross-Domain Child Window Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2014-07-24 19:02 -0300
    Re: Checking Loading Status of Cross-Domain Child Window Win User <winuser@ms.invalid> - 2014-07-24 22:40 +0000
      Re: Checking Loading Status of Cross-Domain Child Window Andreas Bergmaier <andber93@web.de> - 2014-07-25 01:28 +0200
        Re: Checking Loading Status of Cross-Domain Child Window Win User <winuser@ms.invalid> - 2014-07-25 00:34 +0000
          Re: Checking Loading Status of Cross-Domain Child Window Andreas Bergmaier <andber93@web.de> - 2014-07-25 04:31 +0200
    Re: Checking Loading Status of Cross-Domain Child Window Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-07-25 11:59 +0200

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