inputcnv1.0
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Components / IpInput

IpInput

An address field that shows the computed host range for a CIDR block, so an allow-list entry can be checked before it is saved. maxPrefix is the constraint that earns its keep: it is what stops somebody allow-listing 0.0.0.0/0 by accident.

$ npx shadcn@latest add https://input-cn.vercel.app/r/ip-input.json
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Most people reach this component through an agent rather than by reading the page. Pick how you want it wired and take a prompt that already carries the canonical value, the real prop names and the mistakes worth avoiding.

Wiring
Extras
Open in Claude Code

Nothing runs on its own. The link opens the tool with the prompt typed into the box; you read it and press Enter. If the button does nothing, Claude Code is not installed on this machine — use Copy prompt instead.

Live demo

Try 10.0.0.0/24, or paste a whole log line.

value = ""

Constraints

Validation rules, declared as props. Each one produces its own message and its own data-rule value, so a test can assert the rule rather than the sentence.

PROPTYPEDESCRIPTION
noPrivate?booleanReject RFC 1918 private ranges.
noLoopback?booleanReject 127.0.0.0/8.
noMulticast?booleanReject 224.0.0.0/4.
minPrefix?numberSmallest prefix allowed. `minPrefix={8}` rejects /0 through /7. The constraint that earns its keep: it stops an admin allow-listing 0.0.0.0/0 by accident.
maxPrefix?numberLargest prefix allowed. `maxPrefix={24}` rejects /25 and narrower.
requirePrefix?booleanRequire an explicit /n suffix.

Props

PROPTYPEDESCRIPTION
label?ReactNodeVisible label. Supply this or `aria-label` — a field with neither has no accessible name.
hint?ReactNodeHelper text under the field. Replaced by the error message while one is showing.
showRange?booleanShow the computed host range for a CIDR block. Default true.

Shared props

Implemented identically by all eleven components. These tables are generated from the source interfaces at build time, so a renamed prop changes this page rather than quietly making it wrong.

PROPTYPEDESCRIPTION
value?TCanonical value. Controlled mode.
defaultValue?TCanonical value. Uncontrolled mode. Mutually exclusive with `value`.
onChange?(value: T) => voidEmits the canonical value — never a DOM event.
onBlur?() => voidFires when focus leaves the whole component, not between its parts.
name?stringApplied to the hidden canonical input so FormData carries the real value.
disabled?boolean—
readOnly?boolean—
required?boolean | string—
validate?(value: T) => true | stringCustom synchronous rule. Return true, or the message to display.
messages?MessageMapOverride built-in messages by rule name.
showError?ShowErrorDefault `"touched"`.
onValidityChange?(state: ValidityState) => voidReports validity upward regardless of mode.
mode?FieldModeForce a mode instead of auto-detecting. Escape hatch only.
variant?FieldVariantSurface treatment. Default `"outline"`.
size?FieldSizeDensity. Default `"default"` (32px).
id?string—
className?string—
placeholder?string—
autoFocus?boolean—
aria-label?string—
aria-labelledby?string—
aria-describedby?string—
aria-invalid?boolean | "true" | "false"—

With react-hook-form

import { useForm, Controller } from "react-hook-form"
import { zodResolver } from "@hookform/resolvers/zod"
import { cidrSchema } from "@inputcn/ip/schema"
import { IpInput } from "@/components/ui/ip-input"
import { z } from "zod"

// The companion schema validates the CANONICAL value, so the resolver and the
// field can never disagree about what "valid" means.
const schema = z.object({ cidr: cidrSchema() })

export function Example() {
  const { control } = useForm({ resolver: zodResolver(schema) })

  return (
    <Controller
      name="cidr"
      control={control}
      render={({ field, fieldState }) => (
        <IpInput
          label="Allowed range"
          {...field}
          aria-invalid={fieldState.invalid}
        />
      )}
    />
  )
}

With a Server Action

import { IpInput } from "@/components/ui/ip-input"

export default function Page() {
  return (
    <form action={save}>
      <IpInput name="cidr" label="Allowed range" />
      <button>Save</button>
    </form>
  )
}

async function save(data: FormData) {
  "use server"
  // The hidden canonical input carries the real value, not the display text.
  const cidr = data.get("cidr") // "10.0.0.0/24"
}

Emits string, for example "10.0.0.0/24". Keyboard operation is covered by automated tests; screen readers have not been verified yet.

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