Detecting Preview Mode in Twig Templates

Detecting preview mode can be useful to conditionally change frontend behavior - e.g., disabling popups or tracking when editing page content.

🛠️ How to Check for Preview Mode

There are two recommended ways to detect if a page is in preview mode:

When a page is loaded in preview mode, it includes the _preview_token query string.

You can check for this in a controller or directly in your Twig template logic:

1{% if app.request.get('_preview_token') is not null %}
2    {# Show preview-specific logic #} 
3{% endif %}
4

The isPreview variable is automatically passed to the @FiftyDegSyliusDegditorBasePlugin/shop/page.html.twig template.

You can use it directly in your templates like this:

1{% if isPreview %} 
2    {# Show preview-specific logic #} 
3{% endif %}
4

This is the recommended method when you're working inside the standard DegDitor rendering flow.

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