Usage
{% if doc.usage -%}
{$ doc.usage | marked $}
{% else -%}
{% code %}
{$ event.eventTarget $}.$on('{$ event.name $}', function (evt{%- for param in event.params %}, {$ param.alias or param.name $}{%- endfor %}) {
...
});
{% endcode %}
{% endif -%}
{%- endif %}
{% endblock -%}
{% endfor -%}
{% endif -%}