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ES2026 Is Official

Velora | AI Club

13 min read2 hours ago

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I ran every new feature on Node, Bun and Deno. Two of them are not ready where you would expect.ES2026 has no headline feature, and that is exactly why it is worth your time.

Its best addition is one method on Map that deletes a three line pattern you have probably written a hundred times.

Its strangest fact is that Math.sumPrecise works in every major browser but not in Node 26.

And one feature that Node has shipped is still missing from at least one major browser.

Below is every ES2026 feature with the old code it replaces, a runnable example, the trap in each one, and a plain verdict: use it today, use it when you need it, or wait.

What made it into ES2026, and how I tested it

The Ecma General Assembly approved ECMAScript 2026, the 17th edition of the…