Such Grid property is not available in the current version. This is by design.
HTML Elements Team
What is the current recommended solution for¬†displaying row numbers?
/demos/grid/row-headers/ are still distributed with 4.5 and 4.6.
Please consult your own resources before responding to ensure an informed answer.
Indeed, changing showRowNumber to¬ showRowHeaderNumber works.
This must have been a simple oversight in your packaging or htmlelements.com demos might have been revised since 4.6 was published.
Thank you for your¬†prompt response!
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