Theming

Theming Interview Questions

2 curated theming interview questions with detailed answers and examples.

How do CSS custom properties differ from Sass/Less variables?

Compare a build-time text substitution with a live, inherited, runtime value that JavaScript can read and change.

intermediatecustom propertiescsscustom-propertiessass

How would you build a theming system (light/dark mode) using CSS variables?

Design a full theming system: semantic tokens, prefers-color-scheme defaults, a manual override attribute, no-flash hydration, and color-scheme for native UI.

advancedcustom propertiescsscustom-propertiesdark-mode