source.mode "stream" requires an open function; the grid will stay empty.

Warnings reference › source.stream.open

Identifier

source.stream.open

Raised by

The grid (core)

Since

1.0.1

What happened

A stream source is driven by an open function that starts the feed and pushes rows in. Without one nothing ever starts and no row ever arrives.

The fix

Supply source.open.

The smallest fix

source: { mode: 'stream', open: ({ push }) => { const ws = new WebSocket(url); ws.onmessage = (e) => push([JSON.parse(e.data)]); return () => ws.close(); } }

Reference

Covered in full at the API reference.