raw

The raw filter prevents the output of an expression from being escaped by the autoescaper. The raw filter must be the very last operation performed within the expression otherwise the autoescaper will deem the expression as potentially unsafe and escape it regardless.

{% set danger = "<div>" %}
{{ danger | upper | raw }}
{# ouptut: <DIV> #}

If the raw filter is not the last operation performed then the expression will be escaped:

{% set danger = "<div>" %}
{{ danger | raw | upper }}
{# output: &lt;DIV&gt; #}

Please read the escaping guide for more information about escaping.