detail is enabled but neither `rows` nor `render` was supplied; expanding a master would show an empty region, so it stays off.

Warnings reference › detail.rows

Identifier

detail.rows

Raised by

The grid (core)

Since

1.4.0

What happened

A detail region needs something to put in it: either rows (a nested grid) or render (your own content). With neither, expanding a row would open an empty panel, which reads as a defect rather than as a missing option - so the feature is switched off instead and rows do not expand at all.

The fix

Supply detail.rows for a nested grid, or detail.render to draw the panel yourself.

The smallest fix

createGrid(el, { detail: { rows: (row) => row.data.lines } });

Reference

Covered in full at the API reference.