There seems to be some confusion when it comes to JavaScript modules. Some developers are unsure of how they work and why are various ways that they can be used. To clear up some of these ...

Beyond the usual quick tips, let's look at both the business case and the technical side of keeping React bundles lean.

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.