Vega-Lite spec from Fri Oct 30 2020

spec.json

{
  "$schema":"https://vega.github.io/schema/vega-lite/v4.json",
  "data":{
    "url":"https://covid.ourworldindata.org/data/owid-covid-data.csv",
    "format":{
      "parse":{
        "date":"date"
      }
    }
  },
  "width":600,
  "height":400,
  "transform":[
    {
      "filter":{
        "or":[
          {
            "field":"iso_code",
            "equal":"PRT"
          },
          {
            "field":"iso_code",
            "equal":"USA"
          },
          {
            "field":"iso_code",
            "equal":"ESP"
          },
          {
            "field":"iso_code",
            "equal":"NOR"
          },
          {
            "field":"iso_code",
            "equal":"DNK"
          },
          {
            "field":"iso_code",
            "equal":"NLD"
          },
          {
            "field":"iso_code",
            "equal":"ITA"
          },
          {
            "field":"iso_code",
            "equal":"DEU"
          },
          {
            "field":"iso_code",
            "equal":"BRA"
          },
          {
            "field":"iso_code",
            "equal":"SWE"
          }
        ]
      }
    }
  ],
  "encoding":{
    "x":{
      "field":"date",
      "type":"temporal"
    },
    "y":{
      "field":"total_deaths_per_million",
      "type":"quantitative"
    },
    "color":{
      "field":"iso_code",
      "type":"nominal"
    }
  },
  "layer":[
    {
      "mark":"line"
    },
    {
      "selection":{
        "label":{
          "type":"single",
          "nearest":true,
          "on":"mouseover",
          "encodings":[ "x" ],
          "empty":"none"
        }
      },
      "mark":"point",
      "encoding":{
        "opacity":{
          "condition":{
            "selection":"label",
            "value":1
          },
          "value":0
        }
      }
    },
    {
      "transform": [{"filter": {"selection": "label"}}],
      "layer": [
        {
          "encoding": {
            "text": {"type": "quantitative", "field": "total_deaths_per_million"},
            "x": {"type": "temporal", "field": "date"},
            "y": {"type": "quantitative", "field": "total_deaths_per_million"}
          },
          "layer": [
            {
              "mark": {
                "type": "text",
                "stroke": "white",
                "strokeWidth": 2,
                "align": "left",
                "dx": 5,
                "dy": -5
              }
            },
            {
              "mark": {"type": "text", "align": "left", "dx": 5, "dy": -5}            }
          ]
        }
      ]
    }
  ]
}