Upgrading from 3.x.x to 4.x.x
HtmlViewHelper children escaping
The HtmlViewHelper has been changed to escape children now ($escapeChildren = true).
If you used to pass variables containing escaped HTML to the ViewHelper without applying f:format.html, this behaviour will break.
<pdf:html>{someRichText}</pdf:html>
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You will have to change this to apply f:format.html or f:format.raw to the variable:
<pdf:html>{someRichText -> f:format.html}</pdf:html>
<pdf:html>{someRichText -> f:format.raw}</pdf:html>
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Fluid 5
All ViewHelpers have been adapted to support Fluid v5.
This might lead to breaking changes in custom ViewHelpers that extend EXT:pdfviewhelpers ViewHelpers.
Breaking changes are listed in the Fluid documentation: