merge

Syntax

$params :=  merge $default_params $user_params

An example merging two maps.

{{ $default_params := dict "color" "blue" "width" "50%" "height" "25%" }}
{{ $user_params := dict "color" "red" "extra" (dict "duration" 2) }}
{{ $params := merge $default_params $user_params }}

Resulting $params:

"color": "red"
"extra":
  "duration": 2
"height": "25%"
"icon": "mail"
"width": "50%"