by producing a proof-of-concept HTML + CSS renderer over h2 on ESP32 for libwebsockets. Surf the web on a microcontroller without settling for a text-only experience? Why not! He freely admits ...

Divs, which act like glass sheets, can hold other HTML elements such as text objects. A CSS property named z-index determines the order in which divs appear when you stack one on top of another.

which refers to the spacing between lines of text. When creating an HTML page, the equivalent of leading is the CSS "line-height" property, used to set the amount of space between each line.