Sort bars in vega-lite

vega-lite-sort-bars-spec.json

{
  "$schema": "https://vega.github.io/schema/vega-lite/v2.4.json",
  "description": "Bar chart with text labels. Apply scale padding to make the frame cover the labels.",
  "data": {
    "values": [
      {"Metrics": "A1", "Percentage": 0.79},
      {"Metrics": "A2", "Percentage": 0.0399},
      {"Metrics": "A3", "Percentage": 0.9868},
      {"Metrics": "A4", "Percentage": 0.0536},
      {"Metrics": "A5", "Percentage": 0.9412},
      {"Metrics": "A6", "Percentage": 0.0536}
    ]
  },
  "encoding": {
    "y": {
      "field": "Metrics",
      "type": "nominal",
      "sort": "-x"
    },
    "x": {
      "field": "Percentage",
      "type": "quantitative",
      "scale": {"padding": 10}
    },
    "tooltip": [{
      "field": "Metrics",
      "type": "nominal"
    }, {
      "field": "Percentage",
      "type": "quantitative"
    }]
  },
  "layer": [
    {"mark": "bar"},
    {
      "mark": {
        "type": "text",
        "align": "left",
        "baseline": "middle",
        "dx": 3
      },
      "encoding": {"text": {"field": "Percentage", "type": "quantitative"}}
    }
  ]
}