THEME

Implementation: supported · Proposal: merged (status checked 2026-10-31). Theme queries and pushed updates have focused binding and opaque-iframe integration coverage. All capabilities remain subject to change. Maturity and opt-in policy.

Read-only shell theme access — colors, fonts, background, and title. The shell owns theming; the napplet reads it and reacts to changes.

const theme = await window.napplet.theme.get();
document.body.style.background = theme.colors.background;
const sub = window.napplet.theme.onChanged((t) => applyTheme(t));

This non-normative guide defers to the living NAP-THEME proposal. Feature-gate with if (window.napplet?.theme) before use; the runtime injects only available domains. Typed helpers ship from @napplet/nap/theme and @napplet/sdk.

Updates and fallbacks

Theme updates reach napplets with the exposed theme domain, independently of manifest requirement declarations. Theme media URLs do not grant network access, so colors and local fonts provide the fallback. See the living NAP-THEME.

THEME ​

Updates and fallbacks ​

THEME

Updates and fallbacks