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Nunjucks scoped variable declarations

We have to pay attention where we set Nunjucks variables because they are scoped

{% set animals = ['🐱', '🐢', '🐺'] %}

{% for item in animals %}
{% set animal = item %}
{% endfor %}

{{ animal }}
{# animal -> ERROR #}
{# animal declared INSIDE the loop is NOT available #}
{% set animals = ['🐱', '🐢', '🐺'] %}

{# note this declaration #}
{% set animal = '' %}

{% for item in animals %}
{% set animal = item %}
{% endfor %}

{{ animal }}
{# animal declared OUTSIDE the loop is available #}
{# animal -> 🐺 (last array item) #}

πŸ“š More info

Twig docs - set variables

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