Forms & inputExplore · Adapt · Compose
Input
Single-line text control — shadcn-aligned styling, sizes, Field composition, file type, and groups. Make the expected input clear before someone interacts, and keep the current value, help text and validation feedback connected. Explore the live examples, inspect their source and choose the composition that fits your interface before connecting it to your application's data.
The examples use @/components/kamod-ui/input in a Preact project. Follow the live result and its source together: compare supported options in the API reference, refine presentation with the component styles guide, and use shared theme tokens for consistent colors and surfaces. Preserve keyboard behavior and meaningful labels as you replace the sample content.
In this guide 7 sections
Installation
Import Input from @/components/kamod-ui/input.
pnpm add @kamod-ch/uiThe @/components/kamod-ui/… imports in these examples refer to local source files. Configure that alias when copying source, or use the corresponding exports from @kamod-ch/ui when installing the package. Connect the global theme CSS and Tailwind source detection before your first render.
Usage
Pair with Field for label and description. Use orientation="horizontal" on Field for search + button rows. Use InputGroup for prefixed text and icons; ButtonGroup to attach a button flush to the input.
import { Input } from "@/components/kamod-ui/input";Choose a complete composition from the examples below; required child components and props vary by pattern.
Component examples & variants
Explore Input in different contexts, from the starting pattern to the compositions below. Begin with Demo, then compare the examples that match your content, state and layout. These are working patterns to adapt, not a list of interchangeable variant values: check the API reference before using a prop or combining behaviors. Look at the surrounding labels, supporting text and spacing as well as the component itself.
Read the result and its implementation together. Use each showcase’s Code view to inspect imports and composition, or its Prompt view to prepare a setup or adaptation brief. Try the narrow preview and local theme controls before connecting real data, and use Reset to return an example to its initial state. Keep layout changes in class utilities where appropriate; follow the component styles guide for hierarchy and the theming guide for shared surfaces and colors. The accessibility notes explain what to preserve when making those changes.
Demo
Password field with label and helper text (shadcn InputDemo).
import { Field } from "@/components/kamod-ui/field"
import { Input } from "@/components/kamod-ui/input";
export const Example = () => (
<Field
label="API Key"
description="Your API key is encrypted and stored securely."
>
<Input id="demo-api" type="password" placeholder="sk-..." class="max-w-md" />
</Field>
);Basic
Minimal placeholder (shadcn Basic).
Field
Label and description via Field props.
Field group
Stack multiple Field blocks and a horizontal action row (shadcn Field Group).
Disabled
disabled on Input and Field.disabled for group tone (shadcn Disabled).
Invalid
aria-invalid on Input and Field.invalid (shadcn Invalid).
File
type="file" with file:* styling on Input (shadcn File).
Inline
Search field and button in one horizontal Field (shadcn Inline).
Grid
Two columns with CSS grid (shadcn Grid).
Required
Field.required shows an asterisk (shadcn Required).
Badge
Badge in the label row (shadcn Badge).
Input group
Prefix text and trailing icon via InputGroup (shadcn Input Group).
Form
Full form with Select (shadcn Form). Country uses Label + id on SelectTrigger.
Sizes
sm / md / lg height and typography.
Props and data
Configure Input using the contracts below. Read the documented options alongside the source definitions to understand which values your application supplies and which details the component owns. Start with a prop or helper, then follow its type link to inspect the declaration without leaving the page.
Props, slots and variants for this component.
TypeScript source at build time. Props inherited through HTMLAttributes, Omit or variant helpers remain references in those declarations; their fields are not flattened here. Match the reference to your installed version, and check a package’s exports before writing an import type. A type exported by a source file is not necessarily re-exported by @kamod-ch/ui.TypeScriptComponent props
? means a field can be omitted; it does not promise a fallback value. Existing documented defaults remain alongside the descriptions. For callbacks, check the argument and return types before connecting your own state or services.Input
Input component props and accepted values.
| Prop / type | Description |
|---|---|
size | Documented size option for Input. Check its type alongside the usage examples before supplying a value. Documented default |
type | Documented type option for Input. Check its type alongside the usage examples before supplying a value. Documented default |
placeholder | Documented placeholder option for Input. Check its type alongside the usage examples before supplying a value. Documented default |
disabled | Documented disabled option for Input. Check its type alongside the usage examples before supplying a value. Documented default |
aria-invalid | Documented aria-invalid option for Input. Check its type alongside the usage examples before supplying a value. Documented default |
class | Documented class option for Input. Check its type alongside the usage examples before supplying a value. Documented default |
Data type reference
Expand a card to inspect and copy the exact declaration. The code header identifies its repository file; follow imported or inherited types in the implementation source when you need the complete dependency chain. Required-field summaries cover fields declared directly in that type. Source-only helpers and inferred schema outputs describe the local implementation, not additional props you can pass to every component.
InputPropsAccessibility
Build the complete interaction, including the parts outside Input. The notes below distinguish the current implementation from the labels, content and behavior your application supplies. Start with the live preview, check the props and data reference, and test the finished composition with real content rather than assuming that an unchanged visual example covers every use case.
Built-in behavior and defaults
Input renders a native input and forwards its HTML attributes. The native element owns editing, focus and form participation; Kamod adds focus, disabled and invalid styles. A styled wrapper does not provide a label or validation message.
Labels and relationships
Connect a visible Label or FieldLabel through matching htmlFor and id. Choose type, autoComplete and inputMode for the value being requested. Put format instructions in persistent text referenced by aria-describedby, rather than relying on a disappearing placeholder.
Keep the name, help and error connected. The caller supplies the validation message. useId keeps label relationships unique when this field appears more than once; the error is referenced only while it is rendered.
import { Input, Label } from "@kamod-ch/ui";
import { useId } from "preact/hooks";
export function EmailField({ error }: { error?: string }) {
const id = useId();
const helpId = `${id}-help`;
const errorId = `${id}-error`;
return (
<div>
<Label htmlFor={id}>Email address</Label>
<Input id={id} name="email" type="email" autoComplete="email"
aria-invalid={Boolean(error) || undefined}
aria-describedby={[helpId, error ? errorId : undefined].filter(Boolean).join(" ")} />
<p id={helpId}>We send account updates to this address.</p>
{error && <p id={errorId}>{error}</p>}
</div>
);
}Keyboard and focus
Keep native text selection, paste, undo and keyboard editing available. Use readOnly when a value should remain readable and selectable without editing; use disabled only when the control is unavailable. Explain why an action is unavailable nearby.
States and integration details
Set aria-invalid when an actual error is present, and link the correction to the input. The invalid border does not announce an error. Keep required on the control when using native validation; a required asterisk on a Field wrapper does not set it.
Verify the complete interaction
Check behavior as well as markup. Work through these scenarios in the application where the component will be used. Automated checks can help find structural problems; also review the reading experience with a screen reader, keyboard focus and the actual feedback from your application.
- Click the visible label and confirm focus enters the input, including when two copies of the form are mounted.
- Enter an invalid value, leave the field, submit and correct it; check that the description and error remain associated.
- Try paste, browser autofill and a narrow mobile keyboard layout without hiding the focused field.
Recheck the result after changing theme tokens, translations or class overrides. Include text enlargement, narrow layouts and reduced-motion settings where animation is present. Inspect the component source when a behavior differs from your expectation; a role or state attribute does not implement keyboard interaction by itself.
For background, read the WAI-ARIA authoring guidance and keyboard interface guidance. These explain the patterns; verify browser and assistive-technology behavior for the implementation and audience you actually support.
Build it into your interface
Use the Input examples as a starting point, then review the behavior in the context of your own screen. Layout, state and content should work together.
Connect the behavior
Choose where the value lives before wiring up validation. Use the documented change callback, preserve the field name when submitting a native form, and associate help or error text with the control. A placeholder supplements a label; it does not replace one.
Copy the composition, then connect its intent. Replace sample records and callbacks with your own data flow. For options such as value, defaultValue, open or onChange, use only those documented in this component's API; different components expose different contracts.
Give each piece of state one owner. Keep a temporary selection inside the interface when nothing else needs it; lift shared values into a parent when other controls depend on them. Read the prop reference before combining controlled values with defaults. A default normally initializes a control; it is not a substitute for updating its current value.
Connect requests in an event handler or your application’s data layer, never as a side effect of rendering. Keep pending, completed and failed outcomes distinct, preserve useful input after an error, and offer a clear recovery action. If the integration subscribes to an external source, remove that subscription when its owner unmounts; cancel or ignore obsolete requests so an earlier response cannot replace newer results.
Start with the live preview, then exercise the same interaction with your actual data. The type definitions describe accepted values; they do not implement persistence, navigation or server-side validation for you. Keep those responsibilities in the application that composes the UI.
Refine the presentation
Let a parent own the surrounding spacing. Keep related elements together with gap and use semantic surface/foreground pairs so the composition follows the active theme. The wrapper below changes the surrounding layout without assuming extra props on Input.
import type { ComponentChildren } from "preact";
export function ExampleSurface({ children }: { children: ComponentChildren }) {
return (
<div class="grid min-w-0 gap-4 rounded-lg border border-border bg-card p-4 text-card-foreground sm:p-6">
{children}
</div>
);
}Put the chosen example inside ExampleSurface, then refine supported variants and sizes using the API above. For application-wide changes, adjust theme tokens instead of repeating fixed colors. See Component styles for hierarchy, density and focus treatments.
Review the complete interaction
- Try an empty value, a valid value and a rejected value; keep the correction visible beside the field.
- Navigate using only the keyboard and verify the label identifies the focused control.
- Check disabled and read-only behavior separately where supported; they communicate different intentions.
The preview's narrow control changes its container width. Also resize the browser when checking viewport-based Tailwind utilities such as sm: and md:, and test overlays in the full page where their portals render.
Compose a complete interface
Input is one part of the interaction. Choose companion components for the information or actions that still need a place on the screen. The references below are suggestions to compose deliberately, not extra dependencies you must add to every example.
Keep one source of truth for the operation and let each component communicate a different part of it. For example, waiting, no results and failure need different explanations. Avoid showing contradictory states together, and keep recovery actions close to the message that explains them.
Start with the smallest composition that explains the task. Browse the component library for individual controls or the block collections for complete layouts. Reuse shared theme tokens so these pieces feel consistent in light and dark mode.
Sources & design references
Follow Input from its implementation to the ideas behind your own composition. Start with the local API, explore a visual direction, then bring the result back to your app’s shared styles.
Bring it back to your app
A reference becomes useful when it fits your real content. Work through these decisions in order:
- Keep the behavior grounded. Start with the interactive examples, then connect your data and callbacks using the integration guidance. Preserve labels, keyboard access and disabled states as you change the presentation.
- Make the styling repeatable. Use the styles guide for local
classadjustments and theming documentation for shared color decisions. Keep semantic surface and foreground pairs together in both light and dark mode. - Check the complete screen. See how components combine in the block collections, then try long labels, loading states and narrow layouts in your own composition. The Theme Toggle guide helps you expose a scheme switch in the finished interface.