---
title: "Property additionalAttributes"
manual: "TYPO3 Explained"
version: "12.4"
permalink: "https://docs.typo3.org/permalink/t3coreapi:property-additionalattributes@12.4"
source: "ApiOverview/Fluid/AdditionalAttributes.rst"
rendered: "2026-10-21T15:29:37+00:00"
---

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# Property additionalAttributes {#property-additionalattributes}

All Fluid ViewHelper that create exactly one HTML tag, tag-based ViewHelpers,
can get passed the property `additionalAttributes`.

A tag-based Fluid ViewHelper generally supports most attributes that are
also available in HTML. There are, for example, the attributes `class` and
`id`, which exist in all tag-based ViewHelpers.

Sometimes attributes are needed that are not provided by the
ViewHelper. A common example are data attributes.

**EXT:my_extension/Resources/Private/Templates/SomeTemplate.html**

```html
<f:form.textbox additionalAttributes="{data-anything: 'some info', data-something: some.variable}" />
```

The property `additionalAttributes` is especially helpful if only a
few of these additional attributes are needed. Otherwise, it is often
reasonable to write an own ViewHelper which extends the corresponding
ViewHelper.

The property `additionalAttributes` is provided by the
`TagBasedViewHelper` so it is also available to custom ViewHelpers
based on this class. See chapter [Developing a custom ViewHelper](https://docs.typo3.org/permalink/t3coreapi:fluid-custom-viewhelper@12.4).