I want to create one Vega visualization with Vega Embed that should fit to screen size, and another one whose height should respond to screen height (with the visualization width independent of screen width). How to do this?

I'm specifying the charts with Vega JSON specifications. Each visualization goes in its own HTML file, on its own Web page.

CodePudding user response：

You can set the autosize property documented here.

https://vega.github.io/vega/docs/specification/

You can specify fit-x, fit-y and fit for your requirements.

Edit

Check the signal and autosize properties here to have the chart resize.

Editor

{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "description": "A basic bar chart example, with value labels shown upon mouse hover.",
  "autosize": {"type": "fit-x", "contains": "padding"},
  "height": 300,
  "padding": 5,
  "data": [
    {
      "name": "table",
      "values": [
        {"category": "A", "amount": 28},
        {"category": "B", "amount": 55},
        {"category": "C", "amount": 43},
        {"category": "D", "amount": 91},
        {"category": "E", "amount": 81},
        {"category": "F", "amount": 53},
        {"category": "G", "amount": 19},
        {"category": "H", "amount": 87}
      ]
    }
  ],
  "signals": [
    {
      "name": "width",
      "init": "isFinite(containerSize()[0]) ? containerSize()[0] : 200",
      "on": [
        {
          "update": "isFinite(containerSize()[0]) ? containerSize()[0] : 200",
          "events": "window:resize"
        }
      ]
    },
    {
      "name": "tooltip",
      "value": {},
      "on": [
        {"events": "rect:mouseover", "update": "datum"},
        {"events": "rect:mouseout", "update": "{}"}
      ]
    }
  ],
  "scales": [
    {
      "name": "xscale",
      "type": "band",
      "domain": {"data": "table", "field": "category"},
      "range": "width",
      "padding": 0.05,
      "round": true
    },
    {
      "name": "yscale",
      "domain": {"data": "table", "field": "amount"},
      "nice": true,
      "range": "height"
    }
  ],
  "axes": [
    {"orient": "bottom", "scale": "xscale"},
    {"orient": "left", "scale": "yscale"}
  ],
  "marks": [
    {
      "type": "rect",
      "from": {"data": "table"},
      "encode": {
        "enter": {
          "x": {"scale": "xscale", "field": "category"},
          "width": {"scale": "xscale", "band": 1},
          "y": {"scale": "yscale", "field": "amount"},
          "y2": {"scale": "yscale", "value": 0}
        },
        "update": {"fill": {"value": "steelblue"}},
        "hover": {"fill": {"value": "red"}}
      }
    },
    {
      "type": "text",
      "encode": {
        "enter": {
          "align": {"value": "center"},
          "baseline": {"value": "bottom"},
          "fill": {"value": "#333"}
        },
        "update": {
          "x": {"scale": "xscale", "signal": "tooltip.category", "band": 0.5},
          "y": {"scale": "yscale", "signal": "tooltip.amount", "offset": -2},
          "text": {"signal": "tooltip.amount"},
          "fillOpacity": [
            {"test": "datum === tooltip", "value": 0},
            {"value": 1}
          ]
        }
      }
    }
  ]
}