Supported Twig tags – Emarsys ESL

Twig tags are control tools that direct the flow of the templates. Tags are a mix of blocks and conditionals.

if and elseif

Anifstatement checks if something evaluates to true. If it does, the block content up to the (mandatory){% endif %}is processed. This can be a part of the HTML code.

In this example below, we are looking for system field #3, which is the email address. If the contact has an example.com email address, it is displayed so. Otherwise it is stated that it has a different address.

{% if "@example.com" in contact.3 %}
    this is an example.com email address
{% else %}
    this is not an example.com email address
{% endif %}

In anifstatement you can also define an empty field{% '' %}. See example below:

{% if contact.1 !='' %}Dear {{contact.1}}
{% else %}Hallo!{% endif %}

ifexample to define if today is someone’ birthday:

{% if contact.4|localized_date('en','Mdd') == 'now'|localized_date('en','Mdd') %}
Happy birthday !
{% endif %}

In the next example we are targeting our customers based on their gender. We can show different products to them, based on the above query.

{% if contact.5 == 1 %}
   this is for him
{% else %}
   this is for her
{% endif

Please note, that if you combine anifstatement with therequiredfilter, the filter will be evaluated before the if statement.

An email containing the following example will never be sent, asmyvardoes not have a value at the start of the expression.

{% set myvar = "" %}{% if contact.3 == "Mustermann" %}{% set myvar = "test" %}{% endif %}{{ myvar | required }}

Use the following pattern to avoid this. Here,myvardoes have a value when the required filter is evaluated.

{% set myvar = "test" %}{% if contact.3 == "Mustermann" %}{% set myvar = "test2" %}{% else %}{% set myvar = "" %}{% endif %}{{ myvar | required }elseif

In anifstatement, the only mandatory pieces are{% if foo == 'bar' %}and{% endif %}.elseandelseif are useful, but optional only.

elseifis used exclusively for checking another condition after the previous one has failed. If you do not have a second condition to check, you should be usingelse.{% elseif %} is invalid. It should never be used without a precedingifand the precedingifmust not be already closed withendif.

Usingelseif for our example where we are targeting our customers based on their gender. We can show different products to them.

{% if contact.5 == 1 %}
   this is for him
{% elseif contact.5 == 2 %}
   this is for her
{% endif %}

In another example you can use ESL variables withelseif to define someone's zodiac sign for their horoscope.

Hey {% if contact.4|localized_date('en','Mdd') > 1221 or contact.4|localized_date('en','Mdd') < 120 %}
Capricorn
{% elseif contact.4|localized_date('en','Mdd') > 1122 %}
Sagittarius
{% elseif contact.4|localized_date('en','Mdd') > 1022 %}
Scorpio
{% elseif contact.4|localized_date('en','Mdd') > 922 %}
Libra
{% elseif contact.4|localized_date('en','Mdd') > 822 %}
Virgo
{% elseif contact.4|localized_date('en','Mdd') > 722 %}
Leo
{% elseif contact.4|localized_date('en','Mdd') > 620 %}
Cancer
{% elseif contact.4|localized_date('en','Mdd') > 520 %}
Gemini
{% elseif contact.4|localized_date('en','Mdd') > 419 %}
Taurus
{% elseif contact.4|localized_date('en','Mdd') > 320 %}
Aries
{% elseif contact.4|localized_date('en','Mdd') > 218 %}
Pisces
{% elseif contact.4|localized_date('en','Mdd') > 120 %}
Aquarius
{% endif %}, it's time to celebrate

foreach

Theforeachtag works only on arrays, and is used to loop through each key-value pair in an array.

This example loops through the numbers from 1 to 4, and stops at 3 as the limit is set to the 3rd element. The default and maximum limit is 100.

{% foreach asd in [1, 2, 3, 4] limit 3 %}
    {{ asd }}
{% endforeach %}

For more details, have a look at the official Twig tags.