light_dark_spec

light_dark_spec.json

{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.json",
  "description": "Use params to enable light/dark mode",
  "usermeta": {
    "developedBy": "Madison Giammaria",
    "LinkedIn": "https://www.linkedin.com/in/madison-giammaria-58463b33",
    "email": "[email protected]"
  },
  "view": {"stroke": {"expr": "gridColor"}},
  "background": {"expr": "mode === 'light' ? '#fff' : '#000'"},
  "width": 400,
  "height": 275,
  "padding": {"top": 25, "left": 50, "right": 50, "bottom": 25},
  "title": {
    "text": "Examining Life Expectancy - 1955 vs. 2000",
    "anchor": "start",
    "fontSize": 16,
    "color": {"expr": "fontColor"},
    "subtitleColor": {"expr": "fontColor"},
    "orient": "none",
    "dy": -50
  },
  "params": [
    {
      "name": "mode",
      "expr": "length(data('iconSelect_store'))>0 ? 'dark' : 'light'"
    },
    {
      "name": "colorRange",
      "expr": "mode === 'light' ? ['#e6959c', '#911a24'] : ['#e0b8bb', '#c24650']"
    },
    {"name": "lineColor", "expr": "mode === 'light' ? '#db646f' : '#d18489'"},
    {"name": "gridColor", "expr": "mode === 'light' ? '#ddd' : '#555'"},
    {"name": "fontColor", "expr": "mode === 'light' ? '#222' : '#eee'"},
    {
      "name": "lightIconPath",
      "value": "M12,9c1.65,0,3,1.35,3,3s-1.35,3-3,3s-3-1.35-3-3S10.35,9,12,9 M12,7c-2.76,0-5,2.24-5,5s2.24,5,5,5s5-2.24,5-5 S14.76,7,12,7L12,7z M2,13l2,0c0.55,0,1-0.45,1-1s-0.45-1-1-1l-2,0c-0.55,0-1,0.45-1,1S1.45,13,2,13z M20,13l2,0c0.55,0,1-0.45,1-1 s-0.45-1-1-1l-2,0c-0.55,0-1,0.45-1,1S19.45,13,20,13z M11,2v2c0,0.55,0.45,1,1,1s1-0.45,1-1V2c0-0.55-0.45-1-1-1S11,1.45,11,2z M11,20v2c0,0.55,0.45,1,1,1s1-0.45,1-1v-2c0-0.55-0.45-1-1-1C11.45,19,11,19.45,11,20z M5.99,4.58c-0.39-0.39-1.03-0.39-1.41,0 c-0.39,0.39-0.39,1.03,0,1.41l1.06,1.06c0.39,0.39,1.03,0.39,1.41,0s0.39-1.03,0-1.41L5.99,4.58z M18.36,16.95 c-0.39-0.39-1.03-0.39-1.41,0c-0.39,0.39-0.39,1.03,0,1.41l1.06,1.06c0.39,0.39,1.03,0.39,1.41,0c0.39-0.39,0.39-1.03,0-1.41 L18.36,16.95z M19.42,5.99c0.39-0.39,0.39-1.03,0-1.41c-0.39-0.39-1.03-0.39-1.41,0l-1.06,1.06c-0.39,0.39-0.39,1.03,0,1.41 s1.03,0.39,1.41,0L19.42,5.99z M7.05,18.36c0.39-0.39,0.39-1.03,0-1.41c-0.39-0.39-1.03-0.39-1.41,0l-1.06,1.06 c-0.39,0.39-0.39,1.03,0,1.41s1.03,0.39,1.41,0L7.05,18.36z"
    },
    {
      "name": "darkIconPath",
      "value": "M9.37,5.51C9.19,6.15,9.1,6.82,9.1,7.5c0,4.08,3.32,7.4,7.4,7.4c0.68,0,1.35-0.09,1.99-0.27C17.45,17.19,14.93,19,12,19 c-3.86,0-7-3.14-7-7C5,9.07,6.81,6.55,9.37,5.51z M12,3c-4.97,0-9,4.03-9,9s4.03,9,9,9s9-4.03,9-9c0-0.46-0.04-0.92-0.1-1.36 c-0.98,1.37-2.58,2.26-4.4,2.26c-2.98,0-5.4-2.42-5.4-5.4c0-1.81,0.89-3.42,2.26-4.4C12.92,3.04,12.46,3,12,3L12,3z"
    },
    {
      "name": "iconPath",
      "expr": "mode === 'light' ? lightIconPath : darkIconPath"
    }
  ],
  "data": {"url": "data/countries.json"},
  "transform": [
    {
      "filter": {
        "field": "country",
        "oneOf": ["China", "India", "United States", "Indonesia", "Brazil"]
      }
    },
    {"filter": {"field": "year", "oneOf": [1955, 2000]}}
  ],
  "layer": [
    {
      "data": {"values": [{}]},
      "layer": [
        {
          "mark": {
            "type": "point",
            "shape": {"expr": "iconPath"},
            "x": {"expr": "width - 20"},
            "y": -50,
            "fill": {"expr": "fontColor"},
            "stroke": "transparent",
            "size": 3,
            "cursor": "pointer",
            "tooltip": {
              "expr": "'switch to ' + (mode === 'light' ? 'dark' : 'light') + ' mode'"
            }
          }
        },
        {
          "params": [
            {
              "name": "iconMouseover",
              "select": {"type": "point", "on": "mouseover"}
            },
            {
              "name": "iconSelect",
              "select": {"type": "point", "on": "click", "toggle": "true"}
            }
          ],
          "mark": {
            "type": "point",
            "filled": true,
            "x": {"expr": "width-10"},
            "y": -40,
            "fill": {"expr": "fontColor"},
            "stroke": "transparent",
            "size": 500,
            "cursor": "pointer",
            "opacity": {
              "expr": "length(data('iconMouseover_store')) > 0 ? mode === 'light' ? 0.1 : 0.35 : 0"
            },
            "tooltip": {
              "expr": "'switch to ' + (mode === 'light' ? 'dark' : 'light') + ' mode'"
            }
          }
        }
      ]
    },
    {
      "encoding": {
        "x": {
          "field": "life_expect",
          "type": "quantitative",
          "title": "Life Expectancy (years)",
          "axis": {
            "ticks": false,
            "domain": false,
            "grid": true,
            "gridColor": {"expr": "gridColor"}
          }
        },
        "y": {
          "field": "country",
          "type": "nominal",
          "title": "Country",
          "axis": {
            "offset": 5,
            "ticks": false,
            "minExtent": 70,
            "domain": false
          }
        }
      },
      "layer": [
        {
          "mark": {"type": "line", "color": {"expr": "lineColor"}},
          "encoding": {"detail": {"field": "country", "type": "nominal"}}
        },
        {
          "encoding": {
            "color": {
              "field": "year",
              "type": "ordinal",
              "scale": {
                "domain": [1955, 2000],
                "range": [{"expr": "colorRange[0]"}, {"expr": "colorRange[1]"}]
              },
              "legend": {"orient": "bottom"},
              "title": "Year"
            },
            "opacity": {"value": 1}
          },
          "layer": [
            {"mark": {"type": "point", "filled": true, "size": 100}},
            {
              "mark": {
                "type": "text",
                "text": {"expr": "round(datum['life_expect'])"},
                "dy": 15
              },
              "encoding": {}
            }
          ]
        }
      ]
    }
  ],
  "config": {
    "axis": {
      "labelColor": {"expr": "fontColor"},
      "titleColor": {"expr": "fontColor"}
    },
    "legend": {
      "labelColor": {"expr": "fontColor"},
      "titleColor": {"expr": "fontColor"}
    }
  }
}