babel-plugin-transform-proxy-compat

Babel plugin that rewrites property lookups, assignments, deletions, function invocations, 'in' statements, and 'for...in' loops to use function calls from a proxy-compat library, enabling Proxy semantics in environments like IE 11 that lack native Proxy support. Current stable version is 0.22.4, with maintenance-level releases. Key differentiator: allows using modern Proxy-based reactivity or interceptors while targeting legacy browsers without polyfilling Proxy itself. Typically paired with libraries like `proxy-compat` that provide the runtime helper functions.