Stack bar renders on top of axis.

[kanitw]

This is probably because we use layer: ‘back’ for axis (so that gridlines appears behind the bar).

{
  "marktype": "bar",
  "encoding": {
    "x": {"name": "Acceleration","type": "Q","aggregate": "avg"},
    "y": {"name": "Cylinders","type": "O"},
    "color": {"name": "Origin","type": "O"}
  },
  "config": {
    "singleHeight": 400,
    "singleWidth": 400,
    "largeBandMaxCardinality": 20
  },
  "data": {"url": "data/cars.json"}
}

But I don’t know why its transpose does not lead to the same problem.

In any case, maybe we could create two axis, one below marks for gridlines and one above marks for axis?