Hydrate JSON templates & conditional rendering

[cka29]

Hi,
is there a Stac-native way to hydrate the json templates with data before rendering? Like for example have placeholders:

{
  "type":  "text",
  "data":  "{{ title }}",
  "style":  {
    "color":  "#FFFFFF",
    "fontSize":  24.0
  }
}

Or do we have to do this manually with replace regex.

Second question:
Is there a way to conditionally render widgets from the JSON? for example a config like this

{
  "type":  "text",
  "render": myCondition,
  "data":  "Hello, World!",
  "style":  {
    "color":  "#FFFFFF",
    "fontSize":  24.0
  }
}

Thanks!