Issue in IE11 (IE8 compatibility mode)

[SuneRadich]

At line ~13 you extract any possible extensions, or return an empty array

// Get any extensions that have been enabled for this instance.
ext = allBindings.has( 'wysiwygExtensions' ) ? allBindings.get( 'wysiwygExtensions' ) : [],

Then later line ~29

for (var name in ext) {
    ko.bindingHandlers['wysiwyg'].extensions[ ext[ name ] ]( editor, args, allBindings, bindingContext );
}

Here you iterate over this array. In IE11, set to compatibility mode IE8, this fails. Because the empty array is looped over anyways.

I cant quite figure out if its an error that you return an empty array and not an object, or if the loop should be made like this:

for (var name in ext) {
    if (ext.hasOwnProperty(name)) {
        ko.bindingHandlers['wysiwyg'].extensions[ext[name]](editor, args, allBindings, bindingContext);
    }
}

Both solution fixes the issue for me, but because I havent the insight in how extensions or TinyMCE works, I havent made a pull request to fix this. I would not know what solution is the right one.

[michaelpapworth]

Thank you for your interest in the project. Having reviewed the code your first observation is quite correct. I have made an error at line ~13 and I should have returned and object in place of the array. If you are happy to submit the PR that would be great.