react-phone-input-2

Getting started with react-phone-input-2 is refreshingly straightforward - install, import, and you have a working international phone input in minutes. The component handles country detection, flag display, and formatting automatically. The basic API is intuitive: you pass onChange and value props like any controlled component, and it just works for most common scenarios.

The documentation covers essential use cases well, with clear examples for styling, country restrictions, and validation. However, when you hit edge cases or need custom behavior, things get murky. Error messages are minimal - if your formatting breaks or country detection fails, you're mostly on your own to figure out why. The GitHub issues are active but responses can be slow, and Stack Overflow coverage is sparse.

Debugging styling issues is particularly frustrating since the component injects its own CSS with deep nesting. You'll need to use !important or very specific selectors to override defaults. The package hasn't been updated since mid-2022, which shows in some rough edges, but it remains functional with current React versions.

This library delivers a solid phone input interface with country flags, auto-formatting, and locale detection that works well for basic use cases. The component is straightforward to integrate and handles the visual formatting users expect. However, the lack of updates since mid-2022 is concerning from a security standpoint.

The library doesn't enforce strict validation by default—it formats but doesn't validate phone numbers according to E.164 or libphonenumber standards. You'll need additional validation logic (like google-libphonenumber) to actually verify numbers are legitimate before submission. The onChange handler receives formatted strings, but there's no built-in sanitization, so you must handle malicious input yourself.

Dependency-wise, it pulls in several transitive dependencies that haven't been audited recently. There's no explicit CSP guidance for the country flag assets loaded dynamically. Error handling is minimal—invalid inputs fail silently rather than exposing validation state clearly. For production apps handling sensitive user data, you'll need to wrap this with your own validation, sanitization, and security layers.

React-phone-input-2 does exactly what it promises - drop it in and you get a working international phone input with country flags and formatting. The basic integration is straightforward with simple props like `country`, `value`, and `onChange`. It handles the common cases well: automatic formatting as you type, country detection, and searchable country dropdown.

The TypeScript experience is problematic. While `@types/react-phone-input-2` exists, the type definitions are incomplete and often require manual type assertions. Props aren't well-typed, and you'll frequently encounter `any` types in callbacks. The documentation is bare-bones - mostly just a prop list without clear examples of common patterns like form library integration or validation.

Customizing beyond basic styling becomes painful. The component uses inline styles heavily, making CSS overrides tricky. Error handling is minimal - invalid inputs are silently accepted, requiring you to build your own validation layer. The package hasn't been updated since 2022, and some modern React patterns (like proper controlled component behavior) feel inconsistent.