CoUI PhoneInput#

Quick Reference#

• Widget: PhoneInput
• Variant: 없음 (variant 파라미터 없음) — CoreComponentVariant 축이 없는 단일 폼 컴포넌트
• Size: 없음 — CoreComponentSize 파라미터 없음; 높이는 CorePhoneInputStyle.height로 조절 (기본값 CoreSpace.space40)
• Style slot: phoneInputStyle: CorePhoneInputStyle(...)
• Canonical snippet:

PhoneInput(
  initialCountry: Country.unitedStates,
  onChanged: (phoneNumber) {
    // phoneNumber.fullNumber  → '+11234567890'
    // phoneNumber.number      → '1234567890'  (without dial code)
    // phoneNumber.value       → null when empty, fullNumber otherwise
    print(phoneNumber.fullNumber);
  },
)

한마디로#

이 스킬은 화면에 "전화번호 입력칸"을 만들 때 쓰는 사용법 설명서입니다. 국가 깃발과 국가번호(예: 한국 +82)를 고르는 버튼과 번호 입력칸이 한 칸 안에 합쳐진 형태예요. 마치 해외 배송 주문서에서 나라를 먼저 고르면 앞자리 번호가 자동으로 채워지는 것과 같습니다. 개발자나 AI가 이 입력칸을 일관된 모양으로 빠르게 만들 수 있게 도와줍니다.

무엇을·언제#

• 무엇을 해주나요: 국가 선택 버튼과 전화번호 입력칸을 하나로 묶은 컴포넌트(PhoneInput)를 만드는 방법을 알려줍니다. 나라를 고르면 국가번호 앞자리가 자동으로 바뀌고, 기본적으로 숫자만 입력되도록 막아줍니다. 국가 선택창 안에는 검색칸이 있어 나라 이름·국가번호·국가코드로 바로 찾을 수 있습니다.
• 언제 작동하나요: 회원가입, 본인 인증, 연락처 입력처럼 "전화번호를 받는 화면"을 만들 때 이 스킬이 참고됩니다.
• 어디에서 쓰나요: 모바일 앱(Flutter)과 웹사이트(Web) 두 곳 모두에서 같은 방식으로 쓸 수 있습니다.
• 무엇을 조절할 수 있나요: 보여줄 나라 목록 제한, 안내 문구(placeholder), 입력칸 모양(둥근 정도·높이·간격·색상 등), 비활성화 상태 등을 자유롭게 바꿀 수 있습니다.

핵심 용어#

Overview#

PhoneInput is a form component that combines a country selector trigger and a phone number text field inside a single bordered container. Tapping the selector opens a country picker (search input + country list) that both platforms share as the same UX: search matches country name, dial code, or ISO code (case-insensitive). Selecting a country updates the dial code prefix; the number field accepts only digits by default. The Flutter and Web implementations share the same CorePhoneInputContract interface and CorePhoneInputStyle design tokens.

Resolve priority: widget.phoneInputStyle > CorePhoneInputTheme.style (project theme) > design system defaults.

Variants & sizes#

PhoneInput has no variant or size enum (no CoreComponentSize axis). It is a single-form component; every visual knob flows through the single style slot phoneInputStyle: CorePhoneInputStyle (full field set below).

Flutter (coui_flutter)#

Import#

import 'package:coui_flutter/coui_flutter.dart';

The Country enum (and Countries helper) is re-exported from the phonecodes package through the same barrel — no extra import needed.

Basic usage#

PhoneInput(
  initialCountry: Country.unitedStates,
  onChanged: (phoneNumber) {
    // phoneNumber.fullNumber  → '+11234567890'
    // phoneNumber.number      → '1234567890'  (without dial code)
    // phoneNumber.value       → null when empty, fullNumber otherwise
    print(phoneNumber.fullNumber);
  },
)

With initial value#

PhoneInput(
  initialValue: PhoneNumber(Country.southKorea, '1012345678'),
  onChanged: (phoneNumber) => print(phoneNumber.fullNumber),
)

PhoneNumber uses positional parameters: PhoneNumber(country, number). When initialValue is provided, its country takes precedence over initialCountry and its number over initialNumber.

With placeholder and restricted country list#

PhoneInput(
  initialCountry: Country.southKorea,
  placeholder: 'Phone number',
  countries: const [Country.southKorea, Country.unitedStates, Country.japan],
  onChanged: (phoneNumber) => print(phoneNumber.fullNumber),
)

With external controller#

final _controller = TextEditingController();

PhoneInput(
  controller: _controller,
  initialCountry: Country.unitedStates,
  onChanged: (phoneNumber) => print(phoneNumber.fullNumber),
)

An internal controller is created (and disposed) automatically when controller is null.

Disabled state#

PhoneInput(
  initialCountry: Country.unitedStates,
  enabled: false,
)

Disabled rendering wraps the component in IgnorePointer + Opacity (default opacity 0.5), matching Web's container-level opacity.

Style override via phoneInputStyle#

PhoneInput(
  initialCountry: Country.unitedStates,
  phoneInputStyle: const CorePhoneInputStyle(
    borderRadius: CoreBorderRadius.all(CoreRadius.radius8),
    height: CoreSpace.space48,
    selectorPadding: CoreEdgeInsets.symmetric(horizontal: CoreSpace.space16),
    inputFieldPadding: CoreEdgeInsets.symmetric(horizontal: CoreSpace.space16),
    flagSize: 20.0,
    dropdownFlagSize: 20.0,
    hoverColor: CoreColor.token(CoreColors.tertiary),
  ),
  onChanged: (phoneNumber) => print(phoneNumber.fullNumber),
)

Project-level theme (CorePhoneInputTheme)#

// Inside your CoUI theme setup:
CoreComponentTheme(
  phoneInput: CorePhoneInputTheme(
    style: CorePhoneInputStyle(
      borderRadius: CoreBorderRadius.all(CoreRadius.radius4),
      height: CoreSpace.space40,
    ),
  ),
)

Parameters — PhoneInput (Flutter)#

The three filter* checks run as an if/else-if chain in this order — filterPlusCode (dial code with +, then bare +) → filterZeroCode → filterCountryCode — so at most one filter applies per value read.

Behavior notes (Flutter)#

• Country picker popup: opens anchored below the selector trigger (popover, no vertical invert) with a Search country field on top and the country list below. Search matches name, dialCode, or code (case-insensitive). An empty result shows a muted No results hint.
• Form integration: the state mixes in FormValueSupplier<PhoneNumber, PhoneInput>, so PhoneInput participates in the CoUI form value system automatically; a replaced form value is written back into the text controller.
• Autofill: the number field sets autofillHints: [AutofillHints.telephoneNumber].

PhoneNumber (value object, Flutter)#

Country enum (from phonecodes, re-exported)#

Use Country.<camelCaseName> enum values — e.g. Country.unitedStates, Country.southKorea, Country.japan, Country.unitedKingdom. Use Country.values for the full list. Each value exposes name, code, dialCode, and flag (emoji string).

Note: Korea is Country.southKorea — there is no Country.korea member.

Web / Jaspr (coui_web)#

Import#

import 'package:coui_web/coui_web.dart';

Basic usage#

PhoneInput(
  initialCountry: const CoreCountry(code: 'US', dialCode: '+1', name: 'United States'),
  placeholder: 'Phone number',
  onChanged: (value) {
    // value.fullNumber  → '+11234567890'
    // value.number      → '1234567890'
    // value.countryCode → 'US'
    // value.dialCode    → '+1'
    print(value.fullNumber);
  },
)

With predefined default countries#

PhoneInput.defaultCountries contains 10 common countries (US, KR, JP, GB, DE, FR, CN, IN, CA, AU). When countries is null, this list is used.

PhoneInput(
  initialCountry: const CoreCountry(code: 'KR', dialCode: '+82', name: 'South Korea'),
  countries: PhoneInput.defaultCountries,
  onChanged: (value) => print(value.fullNumber),
)

With custom country list#

PhoneInput(
  initialCountry: const CoreCountry(code: 'KR', dialCode: '+82', name: 'South Korea'),
  countries: const [
    CoreCountry(code: 'KR', dialCode: '+82', name: 'South Korea'),
    CoreCountry(code: 'US', dialCode: '+1', name: 'United States'),
    CoreCountry(code: 'JP', dialCode: '+81', name: 'Japan'),
  ],
  onChanged: (value) => print(value.fullNumber),
)

With HTML attributes and CSS#

PhoneInput(
  id: 'signup-phone',
  classes: 'my-phone-input',
  initialCountry: const CoreCountry(code: 'US', dialCode: '+1', name: 'United States'),
  attributes: const {'data-testid': 'phone-input'},
  onChanged: (value) => print(value.fullNumber),
)

A caller-supplied id becomes the root element id and the outside-click scope for closing the dropdown; when omitted, a generated co-phone-input-N id is used.

Style override via phoneInputStyle#

PhoneInput(
  initialCountry: const CoreCountry(code: 'US', dialCode: '+1', name: 'United States'),
  phoneInputStyle: const CorePhoneInputStyle(
    borderRadius: CoreBorderRadius.all(CoreRadius.radius8),
    height: CoreSpace.space48,
    popupMaxWidth: CoreSpace.space248,
    popupMaxHeight: CoreSpace.space248,
  ),
  onChanged: (value) => print(value.fullNumber),
)

Parameters — PhoneInput (Web)#

Web does not use TextEditingController — the contract's controller field is typed Null and always returns null.

Behavior notes (Web)#

• The number field renders as <input type="tel" autocomplete="tel">.
• The dropdown (role="listbox") renders only while open, with a Search country input on top; clicking outside the component closes it. Each country row is a <button role="option">.
• Accessibility: the selector trigger carries aria-label="Select country", aria-haspopup="listbox", and aria-expanded; the search field carries aria-label="Search country".
• When the parent swaps initialCountry to a new non-null value, the selected country follows (didUpdateComponent).
• PhoneInput.flagEmoji(code) (delegating to CoreCountry.flagEmoji) converts an ISO 2-letter code to its flag emoji.

PhoneInputValue (value object, Web)#

Constructor uses named parameters: PhoneInputValue(countryCode: 'KR', dialCode: '+82', number: '1012345678').

CoreCountry (value object, from coui_core)#

const CoreCountry(code: 'KR', dialCode: '+82', name: 'South Korea')

Use CoreCountry.flagEmoji(code) to convert a code string to its flag emoji (returns '' when code is not exactly 2 characters).

CorePhoneInputStyle fields (single style slot)#

All fields are optional overrides merged over the chain defaults → CorePhoneInputTheme.style → phoneInputStyle. Defaults are static fields on CorePhoneInputStyle (static const, except defaultDialCodeTextStyle which is static final) — the single source of truth shared by both platforms.

CorePhoneInputStyle also provides merge(other) and copyWith(...).

Flutter ↔ Web differences#

Shared across both platforms: CorePhoneInputStyle, CorePhoneInputTheme, CorePhoneInputContract, search-driven country picker UX, and the resolve chain defaults → theme.style → phoneInputStyle.

Pitfalls#

• Korea is Country.southKorea — there is no Country.korea member, so guessing the naming convention will fail here.
• Web's controller field on the contract is typed Null and always returns null — TextEditingController is a Flutter-only concept and is not supported on Web.
• The three Flutter filter* params (filterPlusCode → filterZeroCode → filterCountryCode) run as an if/else-if chain, so at most one filter applies per value read; none of these params exist on Web at all.
• On Web, onlyNumber only toggles the inputmode attribute ("numeric" vs "tel") as a soft keyboard hint — unlike Flutter, it does not attach a digits-only input formatter that actually blocks non-digit characters.
• The combined initialValue (PhoneNumber?) parameter is Flutter-only; Web has no equivalent and requires setting initialCountry + initialNumber separately. When Flutter's initialValue is provided, its country/number silently take precedence over initialCountry/initialNumber.
• CoreCountry.flagEmoji(code) returns '' (not an error) when code is not exactly 2 characters.

v0.127 Migration (Legacy)#

v0.127 removed the Co prefix from widget classes (hard break — no aliases). Core* style/theme/contract names and the value objects are unchanged.

Unchanged names: CorePhoneInputStyle, CorePhoneInputTheme, CorePhoneInputContract, PhoneNumber, PhoneInputValue, CoreCountry, Country.