What you already write, and what it becomes here — plus the handful of things that will genuinely surprise you, which is the part a syntax table cannot carry.
One thing is true of every page below, so it is said once here: keal-view draws every pixel itself. It does not use the platform's widgets, so it does not inherit the platform's accessibility, its input methods, or its look. That is a real cost and the pages below do not pretend otherwise.
Widgets, signals and slots, and a layout engine
Containers, properties and a CSS-shaped theme
A declarative tree rebuilt from state, drawn by the framework
An immediate-mode interface drawn every frame
HTML, CSS and a browser engine in every window