Columns / Header renderer
The headerRenderer prop on a ColumnDef lets you render completely custom header content. It receives the column definition and returns any React node — enabling icons, tooltips, sort indicators, or interactive elements.
Custom header renderer
Hover the info icons next to column titles to see tooltips. The renderer can return any JSX — here we add an info icon with a native
title tooltip on most columns. For right-aligned numeric columns the icon appears before the label.