Gapminder

Remake of Hans Rosling's famous Gapminder visualization. Adapted from https://observablehq.com/@mbostock/the-wealth-health-of-nations.

The (async () => { ... })() bit is a so-called Immediately Invoked Function Expression, which is just a way to define a function and run it immediately without having to give it a name. It is used here to contain all logic that depends on asynchronous operations like fetching datasets.