babel-plugin-annotate-pure-calls

Babel plugin (v0.5.0) that automatically inserts #__PURE__ annotations on top-level call expressions and new expressions in assignment contexts, enabling UglifyJS and Terser to perform dead code elimination for improved bundle sizes. Targeted at libraries where top-level calls are generally side-effect-free, but may break code if misapplied. Current stable version is 0.5.0 with Node >= 18 and peer dependency on @babel/core ^7.0.0. The plugin is actively maintained but the API is simple and stable. Compared to alternatives like 'annotate-pure-call-in-variable-declarator', this plugin covers broader contexts (IIFEs, nested IIFEs) and is more widely adopted.