export: keyword labels variables and functions that should be accessible from outside the current module. import: allows the import of functionality from other modules.

ECMAScript modules, aka ES modules or ESM, is the official JavaScript module syntax. As such, it is not technically a tool, but it has broad implications for JS development and tools.

Another new feature is more control over module detection, helping to address differences in how Node.js and TypeScript handle module entry points, differences between existing "script" code and new ...