babel-plugin-transform-replace-expressions is a Babel plugin that enables efficient and declarative replacement of expressions in your codebase during build time. Resolve complex configurations or feature flags directly within your code by substituting specific expressions with pre-defined values. This approach reduces runtime overhead and code branching, leading to smaller bundle sizes and potential performance improvements. It's ideal for feature gating, environment-specific settings, or version-controlled configurations. Simplifies conditional logic by making it explicit at build time.