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

See also React Starter.

useful links: - names https://stackoverflow.com/questions/17057809/d3-js-what-is-g-in-appendg-d3-js-code

• extra code https://observablehq.com/@mbostock/u-s-state-map
• code https://bl.ocks.org/mbostock/4090848