Bubble Charts

I would like to create a bubble chart, but somehow cannot follow the complex example at https://leeoniya.github.io/uPlot/demos/scatter.html. The example seems overly complicated and not well documented. Is there a simpler example, or would it even make sense to expose the point size as a simple function for Series.Points.size? That would make bubble charts much simpler to create.

For reference, my example uses the following data structure:

const data = [
  [1,2,3,4,5], // x-Axis
  [3,4,5,6,7], // y-Axis
  [2,3,2,6,4], // Bubble radius
];

Start with the scatter demo at leeoniya.github.io/uPlot/demos/scatter.html and the Series.Points.size declaration in dist/uPlot.d.ts. Compare the requested data structure with the existing example, then clarify whether the desired outcome is simpler documentation or a function-based point size API; done should be a documented, usable path for creating the bubble chart.