Complex communication between controllers and directives (and child directives) is a common problem or challenge in large AngularJs applications (and all large MVVM applications in my opinion).
It becomes even more complicated when you have to communicate with a directive, that has an isolated scope,
Using $compile to compile HTML strings in Angular
Say you want to bind a string to an element in Angular. No real problem, you just use expressions or ngBind.
If the string contains HTML that you want to parse, you can use ngSanitize.
But what if your HTML string contains a button that
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