rollup-plugin-messageformat

Rollup plugin that lets you import JSON, YAML, and .properties files containing ICU MessageFormat messages, converting them into message functions compatible with @messageformat/react and @messageformat/runtime. Current stable version is 3.0.0, supporting Node >=14 and shipping TypeScript types. The plugin handles locale-aware file matching, key-path parsing for .properties, and tree-shaking by extracting only used messages. It requires @messageformat/runtime as a runtime peer dependency for generated code. Unlike manual message loading, it integrates directly into the Rollup build pipeline, enabling efficient code splitting and smaller bundles.