By Alvin Alexander. Last updated: June 6, 2016
As a quick note, if you need a Drupal 8 Twig template if/else/then structure where you test to see if a string value is in an array, code like this will work:
{% if node.getType not in ['photo', 'text'] %} <div class="similar"> {{ similar_by_terms }} </div> {% endif %}
That code can be read as, “If the node type is NOT ‘photo’ or ‘text,’ emit the HTML/Twig code shown.”
If you want to state that a string is in an array in a Drupal Twig template file, just remove the “not” from that expression, like this:
{% if node.getType in ['photo', 'text'] %}
Drupal/Twig “if/elseif/else” syntax
In a related note, if you want to write a Drupal/Twig if/else statement, that syntax is:
{% if node.getType in ['photo', 'text'] %} <div>'if' output here ...</div> {% else %} <div>'else' output here ...</div> {% endif %}
Twig also uses the keyword elseif
to stand for “else if.”
There is more information about if/else statements at this Twig documentation page.