Add CSS class based on condition in Thymeleaf
Question:
                How to add CSS class based on condition in Thymeleaf?            Answer:
                <div class="panel" th:classappend="${isFiltered} ? '' : 'filtered' ">Description:
                There is also a specific appending attribute in the Standard Dialect: the th:classappend attribute, which is used for adding a CSS class to an element without overwriting the existing ones.
Reference:
                Class appending reference
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            Tags:
                    classappend, condition based class, css class, thymeleaf, add class                Technical term:
                    Add CSS class based on condition in Thymeleaf