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Nodejs es65/3/2023 ![]() So even if you use ES6 module syntax, you will be using CommonJS under the hood if you run the code in Node. Babel converts import and export declaration to CommonJS ( require/ module.exports) by default anyway. You said yourself that you are using Babel. Keep in mind that there is no JavaScript engine yet that natively supports ES6 modules. Unlike require, this returns a promise.Īre there any performance benefits to using one over the other? In the end you have to run benchmarks to get a definite answer anyway.ĮS modules can be loaded dynamically via the import() function. ![]() However, since module files are only evaluated once, the performance aspect can probably be ignored. Performance-wise there is always the chance that newer features are not as well optimized as existing features. The Node documentation has a ton more information, also about interop between CommonJS and ES modules. mjs or the nearest package.json file must contain "type": "module". Files including node modules must either end in. ![]() ![]() Since Node v12 (April 2019), support for ES modules is enabled by default, and since Node v15 (October 2020) it's stable (see here). ![]()
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