attach/subscribe target has no rows.apply and is not a function; its slice goes nowhere. Pass a grid or a handler(change) function.

Warnings reference › data-router:bad-target

Identifier

data-router:bad-target

Raised by

Data Router

Since

1.33.0

What happened

A route was attached to something the router cannot deliver to. Every target is either a viewer with rows.apply (a grid, a board, a KPI panel) or a plain (change) => {} handler; anything else gets a sink that discards, so the route runs, the metrics count it, and the rows arrive nowhere.

The fix

Pass the viewer itself, or a function that takes the change object.

The smallest fix

router.attach(grid, { where: (row) => row.region === 'EMEA' });
router.subscribe((change) => console.log(change.add.length));

Reference

Covered in full at the API reference.