Query Widgets

{
  "$schema": "https://vega.github.io/schema/vega-lite/v2.json",
  "description": "Drag the sliders to highlight points.",
  "data": {"url": "data/cars.json"},
  "transform": [{"calculate": "year(datum.Year)", "as": "Year"}],
  "layer": [{
    "selection": {
      "CylYr": {
        "type": "single", "fields": ["Cylinders", "Year"],
        "bind": {
          "Cylinders": {"input": "range", "min": 3, "max": 8, "step": 1},
          "Year": {"input": "range", "min": 1969, "max": 1981, "step": 1}
        }
      }
    },
    "mark": "circle",
    "encoding": {
      "x": {"field": "Horsepower", "type": "quantitative"},
      "y": {"field": "Miles_per_Gallon", "type": "quantitative"},
      "color": {
        "condition": {"selection": "CylYr", "field": "Origin", "type": "nominal"},
        "value": "grey"
      }
    }
  }, {
    "transform": [{"filter": {"selection": "CylYr"}}],
    "mark": "circle",
    "encoding": {
      "x": {"field": "Horsepower", "type": "quantitative"},
      "y": {"field": "Miles_per_Gallon", "type": "quantitative"},
      "color": {"field": "Origin", "type": "nominal"},
      "size": {"value": 100}
    }
  }]
}