If I understand you correctly, you would like to make some generic HTML markup look like an initialized Kendo UI widget before the initialization itself. In this case the required approach is to see the resulting widget HTML output and used CSS classes and apply them in advance. We can include this information in the documentation in the future, thanks for the feedback.
Note that adding more than the expected initial HTML markup in advance may result in unexpected behavior (e.g. DOM element duplication), depending on the particular widget. Such scenarios are not something that we officially support or test.
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