{# Render meta tags which include a csrf token. #}
{%- macro render(csrf_token) -%}
    <meta name="csrf-token" content="{{ csrf_token }}">
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
    <meta name="description"
          content="{% block meta_description %}{% endblock %}">
{%- endmacro -%}