run-cpp-on-web: vega

spec-structure.js

const spec = {
  "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
  "width": 800,
  "height": 600,
  "title": {
    <stuff related to the title>
  },
  "data": {
    <holds the iterations we want to plot as an array of iteration objects>
  },
  "encoding": {
    <defines stuff related to which field should go on which axis>
  },
  "mark": {
    <defines the line plot>
  },
  "selection": {
    <defines how users can interact with the plot>
  }
};