The grid (rendering) · console.warn

the header renderer for {kind} '{id}' built ...

Printed by The grid (rendering), prefixed [lattice], since 1.104.1.

Warnings reference › header-element:*

Identifier: header-element:*
Raised by: The grid (rendering)
Since: 1.104.1

What happened

An init()/element() header component's element() returned nothing usable after init() ran, so there is no DOM to draw. The grid falls back to the stock heading.

The fix

Have 'element()' return the HTMLElement the component built in 'init()'.

Reference

Covered in full at the API reference.