Advanced Liquid Techniques

Now that you're familiar with the basics and ConvertKit-specific tags, let's explore more advanced Liquid features to create sophisticated email campaigns.

Loops and Iterations

Basic Loop

{% for tag in subscriber.tags %}
  - {{ tag }}
{% endfor %}

Loop with Index

{% for product in products %}
  {{ forloop.index }}. {{ product.name }}
{% endfor %}

Complex Conditional Logic

Multiple Conditions

{% if subscriber.tags contains "customer" and subscriber.custom_fields.purchase_count > 1 %}
  Thank you for being a repeat customer!
{% endif %}

Case Statements

{% case subscriber.custom_fields.membership_level %}
  {% when "premium" %}
    Here's your premium content...
  {% when "basic" %}
    Here's your basic content...
  {% else %}
    Here's a free preview...
{% endcase %}

Filters and Transformations

String Filters

{{ subscriber.first_name | capitalize }}
{{ subscriber.email | downcase }}
{{ "Hello World" | replace: "World", subscriber.first_name }}

Date Filters

{{ subscriber.created_at | date: "%B %d, %Y" }}
{{ "now" | date: "%Y-%m-%d" }}

Math Filters

{{ subscriber.custom_fields.purchase_count | plus: 1 }}
{{ 100 | minus: subscriber.custom_fields.discount }}

Advanced Examples

Personalized Product Recommendations

{% if subscriber.custom_fields.last_purchase %}
  {% assign related_products = products | where: "category", subscriber.custom_fields.last_purchase.category %}
  {% for product in related_products limit:3 %}
    <div class="product">
      <h3>{{ product.name }}</h3>
      <p>{{ product.description }}</p>
    </div>
  {% endfor %}
{% endif %}

Dynamic Pricing

{% if subscriber.tags contains "vip" %}
  {% assign price = product.price | times: 0.8 %}
  Special VIP Price: ${{ price | round: 2 }}
{% else %}
  Regular Price: ${{ product.price }}
{% endif %}

Best Practices for Advanced Usage

Use comments to document complex logic
Break down complex templates into smaller, reusable snippets
Test edge cases thoroughly
Use meaningful variable names
Consider performance implications of complex operations

Next Steps

Ready to see these techniques in action? Check out our practical examples section for real-world applications of these advanced features.

Advanced Liquid Techniques

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