Forms
PromptComposer
Composes prompts with explicit submission and cancellation events.
01
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.
View PromptComposer code
Framework usage
Switch targets to compare the adapter code. This live preview runs the Astro example. React and Elements use their own behavior APIs; complete the matching framework setup before copying an example.---
import { PromptComposer } from '@santi020k/lumen-astro'
---
<PromptComposer label="Ask about your project" maxLength={4000} submitOnEnter value="Compare the release changes." />import { PromptComposer } from '@santi020k/lumen-react'
export const Example = () => (
<>
<PromptComposer label="Ask about your project" maxLength={4000} submitOnEnter value="Compare the release changes." />
</>
)<script type="module">
import { defineLumenElements } from '@santi020k/lumen-elements/define'
defineLumenElements()
</script>
<lumen-prompt-composer label="Ask about your project" max-length="4000" submit-on-enter value="Compare the release changes."></lumen-prompt-composer>02
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-astropnpm add @santi020k/lumen-astrolumen add PromptComposerlumen add PromptComposerpnpm add @santi020k/lumen-reactpnpm add @santi020k/lumen-reactlumen add PromptComposer --target reactlumen add PromptComposer --target reactpnpm add @santi020k/lumen-elementspnpm add @santi020k/lumen-elementslumen add PromptComposer --target elementslumen add PromptComposer --target elementsAPI reference
Lumen-specific props and runtime attributes for the Astro primitive. Use the framework differences above and the copyable examples for React composition and Elements attributes; the public adapter types define their supported contracts.
| Attribute | Values | Default | Description |
|---|---|---|---|
| label, sendLabel, stopLabel | string | Message, Send, Stop | Localizes the textarea and actions. |
| value / defaultValue | string | empty | React supports controlled value and initial defaultValue. Astro value initializes the native textarea; Elements exposes a mutable value property. |
| maxLength | positive integer | 4000 | Bounds submission and the native textarea. Elements uses max-length. Blank or over-limit messages cannot submit. |
| pending, disabled | boolean | false | Pending prevents another submission and reveals Stop. Disabled also prevents editing and stopping. |
| submitOnEnter | boolean | false | Opts into Enter submission. Shift, other modifiers, composition, and canceled keys preserve normal textarea behavior. |
| onPromptSubmit / ui:prompt-submit | { text: string } | - | React callback or cancelable runtime event carrying trimmed text. Applications own transport and validation. |
| onStop / ui:prompt-stop | callback / event | - | Requests application-owned cancellation; the library does not abort a network request itself. |
| action | native form destination | - | An explicit action retains native POST submission. Without an action, UIPrimitives prevents navigation and emits the event bridge. |
| 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. |