What are the steps to troubleshoot injected JavaScript code when using IE compatibility mode?

I'm looking to incorporate some Javascript scripts into IE and then trigger certain methods.

Here is the C# code I attempted using (the Javascript code builds xpath from a known HTML element).

string xpath = @"
(function(win) {
    ""use strict"";
    var doc = win.document;

    if (doc._xpath_installed) return;
    doc._xpath_installed = true;

    // Rest of the JavaScript code here...

})(window);
";

After that, I proceed to inject the xpath string and call a method,

// Code snippet for injecting xpath and invoking a method

// Executing script in JScript
doc.parentWindow.execScript(xpath, "JScript");
    
object[] args = new object[2];
args[0] = element;
args[1] = 1;
object result = doc.GetType().InvokeMember("createXPath", BindingFlags.Instance | BindingFlags.InvokeMethod, null, doc, args);

This setup functions properly in Internet Explorer 11 on Windows 10.

However, when the website is added to Compatibility View (settings-> compatibility view settings), the InvokeMember call throws an exception "Exception from HRESULT: 0x80020101". This error suggests that there might be script errors within the Javascript code.

In this scenario, my question is - Is there a way to debug this Javascript code effectively without facing difficulties caused by the error code 0x80020101?

Answer №1

If you're looking to troubleshoot code in Edge IE mode, there's a simple solution using IEChooser to access Internet Explorer DevTools:

  1. To begin on Windows, launch the Run dialog box by pressing Windows logo key + R.
  2. Type in
    %systemroot%\system32\f12\IEChooser.exe
    and hit OK.
  3. Within IEChooser, navigate to the entry for the IE mode tab.

For more comprehensive instructions, consult this documentation: Open DevTools on a tab in IE mode.

Answer №2

When encountering script errors in your JavaScript code, have you considered using console.log() or console.debug() to track the client-side code's execution? This approach can provide insights into what is happening within your application.

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