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I am trying to set up lazy loading for the images on my site but currently, any image added via Redactor lacks the necessary 'lazyload' class.
Is there any way to configure Redactor to automatically add this class to any image added through Redactor? I have been digging through the documentation on their site and doing some googling but so far haven't found anything.
Found this plugin doing some digging https://github.com/mmikkel/Retcon-Craft. It looks like it can achieve what you need - appending existing attributes (including class names) by applying a filter to your Redactor field in your Twig template.
