FormsGlass surface

Field

Groups labels, controls, descriptions, and errors.

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FrameworksAstro · React · Elements

Registry commandlumen add Field

InteractionEnhanced runtime

Design sourceLinked component node

See it and copy it

Framework example

Choose Astro, React, or Elements to compare native usage against the shared visual output. Each example assumes the framework-level setup is already complete.

Framework usage

Switch targets to compare the adapter code. The preview stays visually stable because all three packages share the same tokens and ui-* class contract.

---
import {
  Button,
  Field,
  Input,
  Label
} from '@santi020k/lumen-astro'
---

<form data-ui-form data-ex-validated-form style="display: grid; gap: 1rem; max-width: 26rem;">
  <Field>
    <Label for="ex-email">Email</Label>
    <Input
      data-error-required="Add an email address."
      id="ex-email"
      name="email"
      placeholder="you@example.com"
      required
      type="email"
    />
    <p data-ui-field-hint>We only use this for release notes.</p>
    <p data-ui-field-error hidden></p>
  </Field>

  <Field>
    <Label for="ex-workspace">Workspace slug</Label>
    <Input
      data-error-pattern="Use lowercase letters, numbers, and hyphens only."
      id="ex-workspace"
      name="workspace"
      pattern="[a-z0-9-]+"
      placeholder="lumen-team"
      required
    />
    <p data-ui-field-hint>Lowercase letters, numbers, and hyphens.</p>
    <p data-ui-field-error hidden></p>
  </Field>

  <Field>
    <Label for="ex-invite">Invite code</Label>
    <Input
      data-error-custom="Use LUMEN-2026 for the preview."
      id="ex-invite"
      name="inviteCode"
      placeholder="LUMEN-2026"
      required
    />
    <p data-ui-field-hint>Preview access is limited to approved invites.</p>
    <p data-ui-field-error hidden></p>
  </Field>

  <Button type="submit">Request access</Button>
  <p data-ex-form-status aria-live="polite" style="margin: 0;"></p>
</form>

<script>
  const form = document.querySelector('[data-ex-validated-form]')
  const status = document.querySelector('[data-ex-form-status]')

  form?.addEventListener('ui:validate', event => {
    const control = event instanceof CustomEvent ? event.detail?.control : null

    if (!(control instanceof HTMLInputElement) || control.name !== 'inviteCode') return

    control.setCustomValidity(!control.value || control.value === 'LUMEN-2026' ?
      '' :
      'Use LUMEN-2026 for the preview.')
  })

  form?.addEventListener('submit', event => {
    event.preventDefault()
  })

  form?.addEventListener('ui:invalid', () => {
    if (status) status.textContent = 'Resolve the highlighted fields.'
  })

  form?.addEventListener('ui:valid', () => {
    if (status) status.textContent = 'Form is ready to submit.'
  })
</script>

import { Button, Field, Input, Label } from '@santi020k/lumen-react'

export const Example = () => (
  <>
    <form data-ui-form data-ex-validated-form style={{ display: 'grid', gap: '1rem', maxWidth: '26rem' }}>
      <Field>
        <Label htmlFor="ex-email">Email</Label>
        <Input
          data-error-required="Add an email address."
          id="ex-email"
          name="email"
          placeholder="you@example.com"
          required
          type="email"
        />
        <p data-ui-field-hint>We only use this for release notes.</p>
        <p data-ui-field-error hidden></p>
      </Field>

      <Field>
        <Label htmlFor="ex-workspace">Workspace slug</Label>
        <Input
          data-error-pattern="Use lowercase letters, numbers, and hyphens only."
          id="ex-workspace"
          name="workspace"
          pattern="[a-z0-9-]+"
          placeholder="lumen-team"
          required
        />
        <p data-ui-field-hint>Lowercase letters, numbers, and hyphens.</p>
        <p data-ui-field-error hidden></p>
      </Field>

      <Field>
        <Label htmlFor="ex-invite">Invite code</Label>
        <Input
          data-error-custom="Use LUMEN-2026 for the preview."
          id="ex-invite"
          name="inviteCode"
          placeholder="LUMEN-2026"
          required
        />
        <p data-ui-field-hint>Preview access is limited to approved invites.</p>
        <p data-ui-field-error hidden></p>
      </Field>

      <Button type="submit">Request access</Button>
      <p data-ex-form-status aria-live="polite" style={{ margin: '0' }}></p>
    </form>

    <script>
      const form = document.querySelector('[data-ex-validated-form]')
      const status = document.querySelector('[data-ex-form-status]')

      form?.addEventListener('ui:validate', event => {
        const control = event instanceof CustomEvent ? event.detail?.control : null

        if (!(control instanceof HTMLInputElement) || control.name !== 'inviteCode') return

        control.setCustomValidity(!control.value || control.value === 'LUMEN-2026' ?
          '' :
          'Use LUMEN-2026 for the preview.')
      })

      form?.addEventListener('submit', event => {
        event.preventDefault()
      })

      form?.addEventListener('ui:invalid', () => {
        if (status) status.textContent = 'Resolve the highlighted fields.'
      })

      form?.addEventListener('ui:valid', () => {
        if (status) status.textContent = 'Form is ready to submit.'
      })
    </script>
  </>
)

<script type="module">
  import { defineLumenElements } from '@santi020k/lumen-elements/define'

  defineLumenElements()
</script>

<form data-ui-form data-ex-validated-form style="display: grid; gap: 1rem; max-width: 26rem;">
  <lumen-field>
    <lumen-label for="ex-email">Email</lumen-label>
    <lumen-input
      data-error-required="Add an email address."
      id="ex-email"
      name="email"
      placeholder="you@example.com"
      required
      type="email"></lumen-input>
    <p data-ui-field-hint>We only use this for release notes.</p>
    <p data-ui-field-error hidden></p>
  </lumen-field>

  <lumen-field>
    <lumen-label for="ex-workspace">Workspace slug</lumen-label>
    <lumen-input
      data-error-pattern="Use lowercase letters, numbers, and hyphens only."
      id="ex-workspace"
      name="workspace"
      pattern="[a-z0-9-]+"
      placeholder="lumen-team"
      required></lumen-input>
    <p data-ui-field-hint>Lowercase letters, numbers, and hyphens.</p>
    <p data-ui-field-error hidden></p>
  </lumen-field>

  <lumen-field>
    <lumen-label for="ex-invite">Invite code</lumen-label>
    <lumen-input
      data-error-custom="Use LUMEN-2026 for the preview."
      id="ex-invite"
      name="inviteCode"
      placeholder="LUMEN-2026"
      required></lumen-input>
    <p data-ui-field-hint>Preview access is limited to approved invites.</p>
    <p data-ui-field-error hidden></p>
  </lumen-field>

  <lumen-button type="submit">Request access</lumen-button>
  <p data-ex-form-status aria-live="polite" style="margin: 0;"></p>
</form>

<script>
  const form = document.querySelector('[data-ex-validated-form]')
  const status = document.querySelector('[data-ex-form-status]')

  form?.addEventListener('ui:validate', event => {
    const control = event instanceof CustomEvent ? event.detail?.control : null

    if (!(control instanceof HTMLInputElement) || control.name !== 'inviteCode') return

    control.setCustomValidity(!control.value || control.value === 'LUMEN-2026' ?
      '' :
      'Use LUMEN-2026 for the preview.')
  })

  form?.addEventListener('submit', event => {
    event.preventDefault()
  })

  form?.addEventListener('ui:invalid', () => {
    if (status) status.textContent = 'Resolve the highlighted fields.'
  })

  form?.addEventListener('ui:valid', () => {
    if (status) status.textContent = 'Form is ready to submit.'
  })
</script>

Edit Field in browser

Choose your target

Add this component

Choose the package for your runtime. All adapters share the Lumen stylesheet. Use the matching registry command when you want a local wrapper for that framework.

pnpm add @santi020k/lumen-astro

pnpm add @santi020k/lumen-astro

lumen add Field

lumen add Field

pnpm add @santi020k/lumen-react

pnpm add @santi020k/lumen-react

lumen add Field --target react

lumen add Field --target react

pnpm add @santi020k/lumen-elements

pnpm add @santi020k/lumen-elements

lumen add Field --target elements

lumen add Field --target elements

Glass

Add the glass prop to apply the shared blur, saturation, border, and highlight tokens. Glass reads best over vivid content, so place the surface above imagery or color.

Workspace

Inputs inside a glass field pick up translucent chrome automatically.

Framework usage

Switch targets to compare the adapter code. The preview stays visually stable because all three packages share the same tokens and ui-* class contract.

---
import { Button, Field, Input, Label } from '@santi020k/lumen-astro'
---

<div class="docs-glass-demo" style="justify-items: center;">
  <Field glass style="min-width: min(100%, 22rem); padding: 1.25rem; border-radius: 0.75rem;">
    <Label for="glass-workspace">Workspace</Label>
    <Input id="glass-workspace" placeholder="Lumen Labs" />
    <p>Inputs inside a glass field pick up translucent chrome automatically.</p>
    <Button size="sm">Save</Button>
  </Field>
</div>

import { Button, Field, Input, Label } from '@santi020k/lumen-react'

export const Example = () => (
  <>
    <div className="docs-glass-demo" style={{ justifyItems: 'center' }}>
      <Field glass style={{ minWidth: 'min(100%, 22rem)', padding: '1.25rem', borderRadius: '0.75rem' }}>
        <Label htmlFor="glass-workspace">Workspace</Label>
        <Input id="glass-workspace" placeholder="Lumen Labs" />
        <p>Inputs inside a glass field pick up translucent chrome automatically.</p>
        <Button size="sm">Save</Button>
      </Field>
    </div>
  </>
)

<script type="module">
  import { defineLumenElements } from '@santi020k/lumen-elements/define'

  defineLumenElements()
</script>

<div class="docs-glass-demo" style="justify-items: center;">
  <lumen-field glass style="min-width: min(100%, 22rem); padding: 1.25rem; border-radius: 0.75rem;">
    <lumen-label for="glass-workspace">Workspace</lumen-label>
    <lumen-input id="glass-workspace" placeholder="Lumen Labs"></lumen-input>
    <p>Inputs inside a glass field pick up translucent chrome automatically.</p>
    <lumen-button size="sm">Save</lumen-button>
  </lumen-field>
</div>

Edit Field in browser

API reference

Lumen-specific props and runtime attributes for the Astro primitive. React props follow the same names; Elements use equivalent kebab-case attributes where custom elements expose them.

Attribute	Values	Default	Description
glass	boolean \| "subtle" \| "strong"	false	Applies the tokenized liquid-glass surface treatment with backdrop-filter fallbacks; "subtle" and "strong" adjust the fill intensity.
controlId	string	-	Connects the field to a control elsewhere in the field root.
describedBy	space-separated ids	-	Adds ids to the control aria-describedby value.
data-ui-form	boolean attribute	-	Opts a form into native Constraint Validation API enhancement.
data-error-required, data-error-pattern, data-error-min, data-error-max, data-error-custom	string	-	Overrides browser validationMessage text for matching constraints.
class, className	string	""	Merges custom classes with the generated ui-* root classes.
...native attributes	HTML attributes	-	Forwards standard attributes to the root element unless the component consumes them.

Runtime events

CustomEvents dispatched by the Astro UIPrimitives runtime for this component.

Event	Target	Detail	When
ui:validate	Form ([data-ui-form])	{ control: HTMLInputElement \| HTMLSelectElement \| HTMLTextAreaElement, form: HTMLFormElement, value: string }	Fires before the runtime reads native validity so custom validators can call control.setCustomValidity(message).
ui:invalid	Form ([data-ui-form])	{ control?: HTMLElement, controls?: HTMLElement[], form: HTMLFormElement }	Fires after blur or submit validation finds one or more invalid controls.
ui:valid	Form ([data-ui-form])	{ control?: HTMLElement, controls?: HTMLElement[], form: HTMLFormElement }	Fires after blur or submit validation finds the checked control or form valid.