We Keep Coding

Running executable application on Chrome?

Is it possible to run executable .exe application on Chrome browser or what option do I have?
I have seen example of JavaScript and it is desgined to work on IE because it use WScript.Shell (Not tested)
var ws = new ActiveXObject("WScript.Shell");
ws.run("C:\\System\\Display\\Display.exe \"" + message1 + "\" \"" + message2 + "\"");
So basically javascript it will execute Display.exe <Message>
Display.exe connect to COM3 (serial port) to display price on the Customer Display Pole (Till system)

Short: No it's not possible.
It's not even possible to call local files directly from chrome. It's really locked down in google chrome. If you manage to crack it you could strike it rich
In short, the best way to access local stuff is to set up a local webserver, call it, let the webserver execute a local file/protocol and then return the output to you via xhr or websockets.
Another option might be Java signed with secure certificates to allow some leeway, but even there the security measures are really tight.
Or you could make a chrome plugin and try Native Message Passing
Or, another option is that you fork chromium and build in your own activeX support into it. ChromiumX has a nice ring to it heh.
But all in all, it's really hard to get stuff done via chrome in what you want.
personally I resolved it by using PHP COM on a windows server to which I communicated via ajax requests to do the stuff I needed done, but it's less than ideal.

Recover javascript logs and errors on Internet Explorer without F12 tool

The main idea is to run a random page on Internet Explorer and get javascript errors and logs.
Is there a way to recover javascript console logs and execution error
from a random web page without accessing the F12 tool on Internet
Explorer?
I found that with Chrome based browser, you can get it on your AppData file log by adding --enable-logging --v=1 args when launching.
Any solution with any language are welcome.
Thank you for your answer.
NOTE :
random page on Internet Explorer means that I do not have the access on the source code.

Basic solution to this would be:
1. Use Exception Handling to catch the errors.
2. Log errors in a Global Array
3. Log the errors in a file using Blob and URL.createObjectURL. All recent browsers support this.

Have you considered using a Bookmarklet that:
Overrides window.console.log and window.console.error (to intercept messages)
Logs incoming messages somewhere using createObjectURL?
Or you could use something like firebuglite and auto-enable it like this:
<script type="text/javascript" src="https://getfirebug.com/firebug-lite.js">
{
overrideConsole: false,
startInNewWindow: true,
startOpened: true,
enableTrace: true
}
</script>
More instructions are here: http://getfirebug.com/firebuglite

If the F12 tool is not of your interest, then what about the Event Viewer? Open Event Viewer from Control Panel -> System and Security -> Administrative Tools -> Event Viewer.‌ Then select the log Applications and Services Logs\Internet Explorer.
By default no events are being logged for Internet Explorer, to enable them create a new DWORD registry value named Feature_Enable_Compat_Logging under the following registry key:
HKCU\SOFTWARE\Microsoft\Windows\Internet Explorer\Main \FeatureControl
and set the registry value to 1.
Check the logs you get to see if it's what you're looking for.

One idea would be to write a browser extension which listens for window.onerror and writes to a file. Definitely not as elegant as the Chrome solution, but it would work fairly well.

Using local proxy might be a good one-time solution.
Charles web debugging proxy app has nice UI and it allows to replace any response with local resource.
So basically you'll need:
Download one any of the js files used on target page
add any code you wish to saved version
set up Charles to serve you your local version instead of remote one

You might try Fiddler. It's got its own logging and has amazing inspection power. It won't capture IE specific errors, since it's at a different layer, but it will definitely get you any code that's coming over the wire.

Access ActiveX objects in Firefox and Chrome

I have a situtaion where i need the command prompt to open on the click of a button. for this i started of by usign jsp.
var wsh = new ActiveXObject('WScript.Shell');
command = "cmd /k D:\ & cd testTrial & trial.bat & echo DONE!"
wsh.Run(command);
The problem is that this wont run in firefox as ActiveXObject is a Microsoft propritory.
Is there a way i can check the browser and then run the above code keeping the current browser in mind.

This sounds like a security hole... I don't think you will be able to do that.

As I know for security reason other browsers does not allow to access local resources.

Javascript Access to File on local machine

I want to open the files located on local drive using window.open().
When i try to access the file using window.open i am getting error "Access is denied."
Would somebody help to achieve this requirement in Internet explorer 8.0?
Thanks!

You can't. And thank God for that. Imagine how insecure the internet would've been if JS was able to access a client's file-system.
Of course, IE8 has the MS specific JScript superset (ActiveXObject), which does enable filesystem access:
var fileHandle,
fs = new ActiveXObject("Scripting.FileSystemObject");
fileHandle = fs.OpenTextFile("C:\\path\\to\\file.tmp", 1, true);
fileHandle.Write('This is written to a file');
console.log(fileHandle.ReadLine());//will log what we've just written to the file
But this is non-standard, is - I think- no longer supported either, and doesn't work X-browser.
Here's the documentation. At the bottom there's a link to a more detailed overview of the properties and methods this object has to offer, as you can see, there's a lot to choose from

I'm adding this answer just to be complete, but so far as Web Pages go, Elias Van Ootegem's answer is correct: you can't (and shouldn't be able to) get to the local hard drive.
But .. you can isf your page is an HTA (HTML Application) :
HTML Application wiki
This is essentially a web page with .hta as the extension(usually) and some extra tags to tell IE that it's an HTA application, not a web page.
This is something that runs via the windows operating system and is so far as I'm aware only available for IE. The HTA application opens as a web page in IE, but without the usual web navigation / favourites toolbars etc.
Note that if you have a page on an internet server delivered as an HTA application, you're likely to cause virus scanners and firewalls to pop up because this would essenstially be running a script whcih could do manything to your computer. Not good for general internert stuff at all, but might be useful in a secure environment like an intranet where the source of the application is known to be safe.
To get to the file system, you can use javascript code like this :
// set up a Fils System Object variable..
var FSO = new ActiveXObject("Scripting.FileSystemObject");
// function to read a file
function ReadFile(sFile) {
var f, ts;
var s="";
if(FSO.FileExists(sFile))
{
f = FSO.GetFile(sFile);
ts = f.OpenAsTextStream(ForReading, TristateUseDefault);
if (!ts.AtEndOfStream) {s = ts.ReadAll( )};
ts.Close( );
}
return s;
}
alert(ReadFile("c:\\somefilename.txt");

Windows Phone 8 IE10 Javascript debugging

IE10 has some wonderful enhancements in the HTML5 compliance area but remains a bear to develop JavaScript HTML5 when running on the WP8 as there is no way to debug the app except console messages.
Is there a remote debugging experience available for IE10 running on WP8 like the WebKit phone browsers have(see my video at http://www.youtube.com/watch?v=GNAjzFpNEj4 for example). When this is in place with a USB cable to desktop Safari debugging Javascript apps on IOS is easy as breakpoints can be set and variables examined in the remote debugger . I am hoping the same capabilities are in IE10 and would appreciate any information on where to enable these very much needed capabilities.

The bad news, that there is no new debug capabilities in comparison to WP7/IE9. Please take a look on How do I debug Internet Explorer on Windows Phone 7? since we are in exactly the same situation on WP8.
What I personally use on daily basis
Debug your app in IE10 Desktop as much as possible
Weinre remote debugger. Demo video. You can use the following app based on Weinre to simplify its usage (no local setup needed) - IeMobileDebugger src or link to Store
Supports
Html traversing
Html node styles, properties, metrics
Reading console output
Executing js on device side from console (including intellisense)
Dynamic script injection - ability to debug live sites
Not supported
js breakpoints
For javascript line by line debugging use aardwolf. Demo with VS integration.
To redirect console trace to Visual Studio output and be able to use console.log("some message") for tracing
index.html:
<script type="text/javascript">
window.console = {
log: function (str) { window.external.Notify(str); }
};
// output errors to console log
window.onerror = function (e) {
console.log("window.onerror ::" + JSON.stringify(e));
};
console.log("Installed console !");
</script>
MainPage.xaml.cs
private void Browser_Loaded(object sender, RoutedEventArgs e)
{
Browser.IsScriptEnabled = true;
// Add your URL here
Browser.Navigate(new Uri(MainUri, UriKind.Relative));
Browser.ScriptNotify += (s, arg) =>
{
Debug.WriteLine(arg.Value);
};
}

FWIW: Windows Phone 8.1 finally supports remote debugging. See http://blogs.msdn.com/b/visualstudioalm/archive/2014/04/04/diagnosing-mobile-website-issues-on-windows-phone-8-1-with-visual-studio.aspx

While not a full solution, Lauri Piispanen's consolelog.js, a nodejs-based remote JS console logger could help you.