A bare minimum HTML page demonstrating use of CSS and JavaScript.

See also React Starter.

Half way towards a smiley face -- we used CSS to make the margins and the colors.

We used SVG to make the circles.

Feeling frustrated that we couldn't use math to define the DOM structure and use JSX to write HTML in JS and math from JS

Using React, we used JSX to allow us to include HTML in JS

In order to get the smile, we need to use an arc feature, but there's no such element in SVG. So we need to use D3.

We can use d3-shape to get the arc