Mike Bostock

D3 examples as reusable functions! Ready for import or copy-paste.

D3 Charts

Graphical primitives for visualization, such as lines and areas.

d3-shape

you might want to replace aapl with aaplMissing to show the missing data

or the example for the area mark with missing data: 
Plot.plot({
  marks: [
    Plot.line(aaplMissing, {
      filter: d => !isNaN(d.close),
      x: "date",
      y: "close",
      stroke: "#eee"
    }),
    Plot.line(aaplMissing, {
      x: "date",
      y: "close",
      stroke: "steelblue"
    })
  ]
})