Some of the standout features in Node.js 21 include a newer V8 engine that improves on performance and efficiency. Native fetch API simplifies HTTP requests, along with better ECMAScript module support. This means developers can get better error detection, and improve their internationalization story and there is an experimental WebCrypto API which should make it easier to perform secure cryptographic operations. Combined, these advancements increase responsiveness to applications and simplify the process of building them.
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