Core UI
Collapsible
A single disclosure panel with controlled or local state, native button keyboard behavior, reduced-motion support, and a Velocity theme transition.
$ velocityx add collapsible
Built for react.
Needs react already installed
as a peer dependency.
An Astro-only project needs @astrojs/react wired up first — this won't run on its own in plain Astro.
Needs a licence key — buy lifetime access here, then
velocityx login once.
open and onOpenChange props.
- Framework
- react
- Source
- 87 lines
- Collapsible.jsx
- Runtime
- Interactive
- runs in the browser
- Theme
- 1 tokens
- re-themes from your scale
- Accessibility
- 3 ARIA
- attributes and roles
Props
| Name | Type | Required | Default | Description |
|---|---|---|---|---|
| title | string | Yes | Required visible and accessible trigger name. | |
| children | ReactNode | Yes | Panel content. | |
| open | boolean | No | undefined | Controlled open state. |
| defaultOpen | boolean | No | false | Initial local state. |
| onOpenChange | undefined | No | undefined | function(nextOpen: boolean) Called after activation. |
| disabled | boolean | No | false | Disables the trigger. |
| className | string | No | '' | Additional root classes. |
Using it
The smallest call that compiles — required props only. The import is
written for your own file at src/components/Example.jsx;
adjust the relative import if yours sits elsewhere.
Everything optional is in the table above, with its default.
import Collapsible from './velocity/collapsible/Collapsible';
export default function Example() {
return (
<Collapsible title="When does access start?">
Access begins after your account is provisioned.
</Collapsible>
);
}Built from Collapsible's own prop signature and the path the CLI installs it to, so it can't drift from either.
Accessibility
- ARIA attributes
- aria-controls, aria-expanded, aria-hidden
- Keyboard
- Built on native controls — Enter/Space work as standard
- Motion
- Respects prefers-reduced-motion
Read from the source, not asserted — anything not listed simply isn't in this component's markup.
Behaviour
- Ships client JS
- Yes — this one needs to hydrate
- React hooks
- useId, useState
Theming
This component paints from 1 step of
your theme scale — no hardcoded colours, and no font-family of
its own, so your type cascade wins. Override the variables and it follows.
primary-600Get the Velocity preset and CSS theme from the public source guide. The CLI theme command is not available on npm yet.
File this creates
The CLI writes this path into your project — nothing
else moves. Paths are under your source root, which defaults to
src/; pass
--dest if yours is elsewhere.
-
src/components/velocity/collapsible/Collapsible.jsx87 lines
Copy the paths
src/components/velocity/collapsible/Collapsible.jsxCollapsible — questions
How do I install Collapsible?
Run velocityx add collapsible . The CLI writes the source straight into your project — it is not a runtime package dependency.
Do I need a licence for Collapsible?
Yes. It is part of the lifetime library — buy access at https://aidxn.com/shop/velocity-x-component-library/, authenticate once, and install it. Your lifetime licence includes future component updates.
Can I edit Collapsible after installing it?
Yes — the files are yours once written. The CLI compares its lockfile hash before upgrades and refuses to overwrite code you changed.
Does Collapsible ship JavaScript to my users?
Yes. It runs in the browser (useId, useState), so it needs to hydrate — in Astro, give it a client:* directive.
Will Collapsible match my brand colours?
Yes. It paints entirely from your theme scale — 1 steps of primary-* / accent-* — with no hardcoded hex values and no font-family of its own. Override the theme CSS variables and it follows your design system instead of ours.
Does Collapsible pull in any dependencies?
No external ones. Every component in the library is built with react/react-dom or plain Astro only — no GSAP, Radix, Swiper or Headless UI — which is what makes dropping it into an existing project safe.
Set up & reference
All docs →Install this component:
$ velocityx add collapsible- 2. Install the theme — run this first, once per project Do this once per project, before your first component.
- The palette gotcha — this one bites silently Silent failure — the component renders, just unstyled.
- Your edits are safe by default What happens to your changes when you upgrade.
- You own the code What you are actually buying.
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