Intl.js Polyfill

Intl.js is a robust polyfill for the ECMA-402 ECMAScript Internationalization API, designed to provide comprehensive localization methods, including `Intl.NumberFormat` and `Intl.DateTimeFormat`, across various JavaScript environments. Currently at version 1.2.5, this library addresses the absence of native `Intl` support or incomplete locale data in legacy browsers like older Safari, as well as specific Node.js versions prior to 0.12 or lacking full CLDR data. Its release cadence is event-driven, with major/minor updates coinciding with new editions of the Ecma-402 specification (e.g., v1.2.1 for Ecma-402 2016) and significant CLDR data updates (e.g., v1.1.0 for CLDR 28.0.0). Patch releases are frequent for bug fixes and minor improvements. A key advantage of Intl.js is its ability to seamlessly integrate with public polyfill services like `cdn.polyfill.io`, ensuring that the polyfill code and corresponding locale data are only loaded by browsers that genuinely require them, thereby optimizing application performance and bandwidth usage. For server-side Node.js applications, it offers explicit mechanisms to detect and patch the runtime with the necessary `Intl` constructors and locale information. This package is crucial for developers building internationally-aware applications targeting a wide range of client and server environments.