block--preview-aware-block.html.twig

{% if in_preview %}
  The block template is being previewed.
{% endif %}

{% include '@block/block.html.twig' %}

File

core/modules/layout_builder/tests/modules/layout_builder_test/templates/block--preview-aware-block.html.twig

{% if in_preview %}
  The block template is being previewed.
{% endif %}

{% include '@block/block.html.twig' %}