axes_scaleanchor-constrain-domain-fixedrange.json

{
  "data": [
    {
      "y": [2, 3, 4, 5, 6],
      "x": [2, 3, 4, 5, 6],
      "z": [
        [0.5, 0.8, 0.6, 0.8, 0.2],
        [0.4, 0.3, 0.7, 0.2, 0.1],
        [0.7, 0.5, 0.9, 0.5, 0.3],
        [0.5, 0.8, 0.6, 0.8, 0.2],
        [0.4, 0.3, 0.7, 0.2, 0.1]
      ],
      "type": "heatmap"
    }
  ],
  "layout": {
    "xaxis": {
      "constrain": "domain",
      "fixedrange": true
    },
    "yaxis": {
      "constrain": "domain",
      "scaleanchor": "x",
      "scaleratio": 1,
      "fixedrange": true
    }
  }
}