Reading Preferences Toggle

Lets readers pick a comfortable text size and line width for a long article and remembers the choice for their next visit, instead of forcing one fixed measure on everyone. Labelled buttons and a radiogroup, never icon-only controls, and it degrades gracefully if storage is blocked.

Long-form · Astro · Subscription · commercial licence · v1.0.1 · updated 2026-10-15 · Live demo

Install

velocityx add reading-preferences-toggle

Subscription component. Run velocityx login with your key first — get one.

---
import ReadingPreferences from '../components/velocity/reading-preferences-toggle/ReadingPreferences.astro';
---
<ReadingPreferences />

Props

Prop	Type	Default	Description
target	string	required	id of the element whose font size + measure this should control.
label	string	'Reading preferences'	Visually hidden group label.

Files written

velocityx drops these into your project:

• components/velocity/reading-preferences-toggle/ReadingPreferences.astro

Peer dependencies

None.

Theming

Colours come from the primary-* / accent-* Tailwind scales, so this drops into a project that is not Velocity without dragging our brand in. Install the contract once:

velocityx theme

Then set your whole brand in one place — raw RGB channels, not hex (a hex here silently breaks every opacity variant):

:root {
  --vx-brand: custom;
  --vx-primary-600: 220 38 38;
}

There is no component-level font-family anywhere in the library — your font cascade wins.

Licence

Commercial, for the duration of an active Velocity X subscription. The source is served by the licence-gated endpoint, never by the public CDN.