Fieldset

A labeled, vertically-stacked group of form controls.

Real use · profile group

ProfileYour full legal name.

Disabled cascades to every control

Billing (locked)Contact support to change billing.

Using Fieldset

Silica ships one design system through three paths. They share a class vocabulary but are not interchangeable — pick the one that matches what you are building.

Plain HTML — CSS classes

The Tailwind v4 plugin. Works in any framework or none — Rails, Django, PHP, Go, a static file. This path is complete for Fieldset — it needs no JavaScript, so the classes below are the whole story.

/* in your CSS */
@import "tailwindcss";
@plugin "@wizeworks/silicaui";

Root class fieldset, with 2 modifiers:

  • .fieldset
  • .fieldset-label
  • .fieldset-legend

React

Typed components over those same classes, with behavior and accessibility from Base UI.

npm i @wizeworks/silicaui-react
import { Fieldset } from "@wizeworks/silicaui-react";

Source of the demo above

The exact file that renders the examples above, so it can never drift from them. It imports a few of this site’s own layout helpers (../lib/…), so read it for the component calls rather than copying it whole.

Show source
import { Fieldset, FieldsetLegend, FieldsetLabel, Input } from "@wizeworks/silicaui-react";
import { Section } from "../lib/Section";

export function FieldsetDemo() {
    return (
        <>
            <Section title="Real use · profile group">
                <Fieldset className="max-w-sm">
                    <FieldsetLegend>Profile</FieldsetLegend>
                    <Input placeholder="Full name" />
                    <FieldsetLabel>Your full legal name.</FieldsetLabel>
                </Fieldset>
            </Section>

            <Section title="Disabled cascades to every control">
                <Fieldset disabled className="max-w-sm">
                    <FieldsetLegend>Billing (locked)</FieldsetLegend>
                    <Input placeholder="Card number" />
                    <FieldsetLabel>Contact support to change billing.</FieldsetLabel>
                </Fieldset>
            </Section>
        </>
    );
}

Vanilla — node tree to HTML

Fieldset — lowers to <fieldset>, holding its children. Build a node tree, project it with toHtml(), and let the zero-dependency runtime hydrate it. This is the path for generated or user-authored documents — a site builder, CMS output, a static export.

npm i @wizeworks/silicaui-html @wizeworks/silicaui-behaviors
import { atom, toHtml } from "@wizeworks/silicaui-html";

const node = atom("Fieldset", "fieldset", { /* props */ }, [/* children */]);
const markup = toHtml(node);

Styling on this path is the class string in the second argument — the same classes as the Plain HTML section above. There is no color prop here; write "fieldset fieldset-primary" rather than passing a colour as a prop.

Takes children
yes
Hydrated by
nothing — this one is static markup

The full API for Fieldset, on every path, is available through the Silica MCP server.