May be a Terrible Idea: CSS Selector Framework

[anaisbetts]

Cool Ideas:

• jQuery-type operations (XamlQuery has a good list)
• CSS Selectors being the new WhenAny - i.e. not only will the selector return the current collection, it will update. <<-- That's Hard™
• One-Way Binding VMs to CSS Selector results

Prior Art:

• https://github.com/xinmyname/xizzle
• http://xamlquery.codeplex.com/

[DamianReeves]

I love this idea. Been doing more web development lately and CSS Selectors are a killer feature XAML is missing (though I'm sure whatever solution is come up with needs to work across the presentation frameworks supported by ReactiveUI).

[bradphelan]

Could we have a few motivating examples. In my mind a selector framework is
necessary for XAML styles.

For selection on Reactive object for WhenAny it could be complex in the
general case. For HTML selectors are simple cause it is a tree. VM can be
graphs. That might be fiddly.

In the simple case

This.WhenAny(x=>x.collection[*].field, x => x.Value)

Would be useful but it is not real c# notation. How about a linq to whenany
extension

From n in x.collection
Select n.field