Resources/Private/Partials/Backend/Card/Header.html
<html
xmlns:f="http://typo3.org/ns/TYPO3/CMS/Fluid/ViewHelpers"
xmlns:core="http://typo3.org/ns/TYPO3/CMS/Core/ViewHelpers"
data-namespace-typo3-fluid="true">
<div class="card-header">
<f:if condition="{icon}">
<div class="card-icon">
<span class="card-header-icon-image">
<core:icon identifier="{icon}" size="large"/>
</span>
</div>
</f:if>
<div class="card-header-body">
<f:if condition="{title}">
<h2 class="card-title">{title}</h2>
</f:if>
<f:if condition="{subtitle}">
<span class="card-subtitle">{subtitle}</span>
</f:if>
</div>
</div>
</html>