html

{# Checks if a URL exists and passes it to the component. Otherwise, sets it to false. Works with primitive data types. #}
{% set link = url ? { url: url } : false %}

{# Checks if the media object is not empty and passes it to the component. Otherwise, sets it to false. Suitable for complex data types like objects. #}
{% set media = media is not empty ? { media: media } : false %}

personal_data:
  '#type': html_tag
  '#tag': h3
  '#value': 'Personal data'

let details = document.getElementsByTagName('details');
for (i = 0; i < details.length; ++i) {
  details.item(i).open = true;
}