A headless library for international phone inputs

International phone inputs are surprisingly tricky to implement correctly. Formatting, validation, country detection, and handling edge cases can quickly become complex when building phone input fields for different regions. Over the weekend, I built a small open-source library to experiment with a different approach: a headless engine that handles parsing, masking, and validation of international phone numbers while leaving the UI completely up to the developer. The core is powered by libphonenumber-js and exposes a deterministic state object that can be used with any framework. Main ideas behind the project: Headless architecture (no UI components) Smart masking based on libphonenumber Country auto-detection while typing Deterministic state output Works with React, React Native, Vue, Angular or vanilla JavaScript Example usage: import { IntlPhoneCore , applyClampedValue } from ' @intl-phone-js/core ' ; const phone = new IntlPhoneCore (); input . addEventListener ( ' input ' , ( e ) =