If a section key returns a function, it will be called
and passed both the unrendered block of text and a renderer
convenience function.
Given this JS:
"name": "Tater",
"bolder": function() {
return function(text, render) {
return "<b>" + render(text) + '</b>'
}
}
And this template:
{{#bolder}}Hi {{name}}.{{/bolder}}
We'll get this output:
<b>Hi Tater.</b>
As you can see, we're pre-processing the text in the block.
This can be used to implement caching, filters (like syntax
highlighting), etc.
You can use `this.name` to access the attribute `name` from
your view.