{% set tag = href is defined and href ? 'a' : 'span' %}
{% set classes = ['badge'] %}
{% if modifier is defined and modifier %}
    {% set classes = classes|merge(['badge--' ~ modifier]) %}
{% endif %}
<{{ tag }}{% if href is defined and href %} href="{{ href }}"{% endif %} class="{{ classes|join(' ') }}">{{ label }}</{{ tag }}>