Здесь у вас есть пример частичного из https://github.com/Startpiloten/startpilot
<html xmlns:f="http://typo3.org/ns/TYPO3/CMS/Fluid/ViewHelpers" data-namespace-typo3-fluid="true">
<f:if condition="{file}">
<f:if condition="{breakpoints}">
<f:else>
<f:variable name="breakpoints" value="{settings.breakpoints}" />
</f:else>
</f:if>
<f:link.typolink parameter="{file.link}" class="picturelink">
<picture>
<f:for each="{breakpoints}" as="breakpoint" iteration="i_breakpoints">
<f:if condition="{i_breakpoints.isLast}">
<f:else>
<source srcset="{f:uri.image(image: file, maxWidth: breakpoint.maxWidth, cropVariant: breakpoint.cropVariant)}" media="({breakpoint.media}: {breakpoint.size}px)">
</f:else>
<f:then>
<source srcset="{f:uri.image(image: file, maxWidth: breakpoint.maxWidth, cropVariant: breakpoint.cropVariant)}" media="({breakpoint.media}: {breakpoint.size}px)">
<img class="img-fluid" src="{f:uri.image(image: file, maxWidth: breakpoint.maxWidth, cropVariant: breakpoint.cropVariant)}" alt="{file.alternative}" title="{file.title}">
</f:then>
</f:if>
</f:for>
</picture>
</f:link.typolink>
</f:if>
<f:comment>
<!---Render Image with custom sizes from TS settings--->
<f:render partial="ImageRender" arguments="{file:file, breakpoints:settings.breakpoints}" />
<!---Render Image with custom sizes -- START --->
<f:variable name="breakpoints" value="{
0:{media:'max-width', size:375, maxWidth:375, cropVariant:'mobile'},
1:{media:'max-width', size:480, maxWidth:480, cropVariant:'mobile'},
2:{media:'max-width', size:767, maxWidth:767, cropVariant:'tablet'},
3:{media:'max-width', size:991, maxWidth:991, cropVariant:'tablet'},
4:{media:'max-width', size:1279, maxWidth:1279, cropVariant:'default'},
5:{media:'max-width', size:1479, maxWidth:1479, cropVariant:'default'},
6:{media:'min-width', size:1480, maxWidth:2000, cropVariant:'default'}
}"/>
<f:render partial="ImageRender" arguments="{file:image, breakpoints:breakpoints}" />
<!---Render Image with custom sizes -- END --->
<!---Render Image with default sizes -- START --->
<f:render partial="ImageRender" arguments="{file:image}" />
</f:comment>
</html>