Docs about stopping the Cascade

[carstenjaksch]

Often partials use a param called class and are nested. In that case, I don't want to use the parent class data in a nested partial that doesn't receive class itself:

{{# The parent partial receives a class. #}}
{{ partial:parent class="some-class" }}

{{#
    @name Parent
    @param class Custom CSS classes.
#}}

{{# No class passed to the child. #}}
<div :$class>
    {{ partial:child }}
</div>

{{#
    @name Child
    @param class Custom CSS classes.
#}}

{{# Since class is null, the Cascade would look upwards until it finds class data. #}}
<div :$class>
    I am a child.
</div>

My solution here was to use view:class. The nested partial doesn't receive the parent's class data anymore. I don't know if this is the intended use case (besides that).

I would either add this as a "best practice" (like in the linked docs article) to the Data Inheritance docs page or another solution that might be better.