<!DOCTYPE html>
-<html{% if app.request.locale is defined and app.request.locale %} lang="{{ app.request.locale }}"{% endif %}>
- <head{% if ogps is defined or facebooks is defined %} prefix="{% if ogps is defined and ogps %}og: http://ogp.me/ns#{% endif %} {% if facebooks is defined and facebooks %}fb: http://ogp.me/ns/fb#{% endif %}"{% endif %}>
+<html{% if locale is defined and locale %} lang="{{ locale }}"{% endif %}>
+ <head{% if facebook is defined and facebook and facebook['heads'] is defined and facebook['heads'] %} prefix="{{ facebook['heads']|map((value, key) => "#{key}: #{value}")|join(' ') }}"{% endif %}>
{% block metas %}<meta charset="UTF-8">{% endblock %}
<title>{% block title %}Welcome!{% endblock %}</title>
{% block stylesheets %}{% endblock %}