Drupal Twig Best Practices

Core Rules

• Variables are auto-escaped — never use |escape unless you know the source
• Use {% trans %} for all user-facing strings
• Use {{ attach_library() }} for CSS/JS — never inline
• Never access services or run queries in Twig

Translation

{# Simple string #}
{% trans %}Hello world{% endtrans %}

{# With variable #}
{% trans %}Hello {{ name }}{% endtrans %}