[CB-8661] executeScript doesn't return the a result on Windows platform

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Component/s: cordova-plugin-inappbrowser, cordova-windows

Environment

Windows 8
Latest version of Cordova 4.3.0
Latest version of Plugin InAppBrowser 0.6.0

• Assignee: Vladimir Kotikov
• Reporter: John Little
• Created: 12/Mar/15 19:26
• Updated: 03/Mar/17 13:01
• Resolved: 28/Apr/15 09:58

Description

executeScript is supposed to provide a variable to the function called when the script is completed as per this clip from the documentation :-
If the injected script is of type code, the callback executes with a single parameter, which is the return value of the script, wrapped in an Array. For multi-line scripts, this is the return value of the last statement, or the last expression evaluated.

When running as a Windows app the array is empty.
Looking in the Windows InAppBrowserProxy.js file, line 230 looks like this
op.oncomplete = function ()

{ hasCallback && win([]); }

;
So clearly no data is being passed ([]) is an empty array.
According to the documentation from Microsoft :-
https://msdn.microsoft.com/en-us/library/windows.ui.xaml.controls.webview.invokescriptasync.aspx

The invokeScriptAsync function can return a string.
So if I modify line 230 to look like this
op.oncomplete = function (e)

{ hasCallback && win([e.target.result]); }

;
I get a string returned to my callback function.
You could also modify the similar line in the injectScriptFile function, as it also calls invokeScriptAsync.

I need the return value because the only way to comunicate between the page in the IAB and the app is to poll some sessionStorage and wait for the page to set some data.