So you have searched and referred to these docs Not Found
This online example Frappe DataTable - JSFiddle - Code Playground
And Faris’s writeup Making a new datatable for the web | by Faris Ansari | Frappe Thoughts | Medium
edit: I wonder whether perhaps demo.erpnext.com includes a working code example?
And not to confuse a DataTable with a DataGrid -
“the datagrid project will replace the report grid in V11”