config.responsive is set but carries no template; the grid stays a table at every width. Supply responsive: { maxWidth: 640, template: '<div>{{cell.name}}</div>' }.

Warnings reference › responsive.missing

Identifier

responsive.missing

Raised by

The grid (rendering)

Since

1.6.0

What happened

The responsive presentation needs a template to switch to below its breakpoint, and none was given. The option does nothing: the grid renders as a table at every width, including on the narrow screens the option was added for.

The fix

Give responsive a template (and a maxWidth if the default breakpoint is not right).

Reference

Covered in full at the API reference.