`grunt-es3-safe-recast` is a Grunt plugin that scans JavaScript source files and rewrites any ES3‑reserved identifiers (and optionally trailing commas) to forms that are safe for legacy ECMAScript 3 environments. It’s aimed at front‑end developers or build engineers who need to ensure their modern code can run on older browsers (e.g., IE 6‑8) as part of an automated Grunt workflow.