Sourced from @​11ty/eleventy's releases.

Eleventy v3.0.0: Possums ❤️ ESM

We did it. After 22 pre-releases and over a year of work, Eleventy 3.0.0 is now available. You can try it out now on your project using:

npm install @11ty/eleventy@latest

If you’re upgrading from a previous version of Eleventy, use the Upgrade Help plugin for automated checks and help with your upgrade!

Why should you use Eleventy? Eleventy is a flexible and production-ready site generator known for its zero-client JavaScript footprint, speedy sites, speedy builds, and full control over the output.

A few numbers on the best version of Eleventy yet:

Stats	v2.0.1	v3.0.0
20% smaller	35.2 MB	28.1 MB
11% fewer dependencies	213	189
9% faster npm install	4.511s*	4.103s*

*fastest time of 3 runs (bypassing local cache)

Flagship 3.0 features

1. Eleventy is now written in ESM with full support for ESM in your projects: configuration, data files, 11ty.js templates, etc. For many projects this won’t be a breaking change and we’ll continue to support CommonJS too. Every example on the docs now includes both a CommonJS and ESM version. Docs: https://v3.11ty.dev/docs/cjs-esm/

// ESM
export default function(eleventyConfig) {}
// We’ll keep supporting CommonJS:
module.exports = function(eleventyConfig) {}

2. Supporting more package managers and runtimes: pnpm, yarn, Deno. More examples on the docs! https://v3.11ty.dev/docs/
3. Asynchronous configuration #614 Docs: https://v3.11ty.dev/docs/config/

// ESM
export default async function(eleventyConfig) {}
// CommonJS
module.exports = async function(eleventyConfig) {}

4. For-free performance improvement to built-in slugify, inputPathToUrl universal filters (via memoization) #840 Docs: https://v3.11ty.dev/docs/memoize/
5. Named config export improves consistency for plugins #3246 and set*Directory configuration API methods #1503 Docs: https://v3.11ty.dev/docs/config-shapes/#optional-export-config-object and https://v3.11ty.dev/docs/config/#configuration-options

export default function(eleventyConfig) {
  eleventyConfig.setInputDirectory(".");
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• 8675d68 v3.0.0
• 5960a86 Update deps
• 1b9b80e Fixes #3468 by adding resetConfig option to addWatchTarget
• dd28e89 Add _headers to extensionless allowlist #3399 https://github.com/11ty/elevent...
• 0142b7c Use v3 subdomain for links from v3 codebase
• eade9a7 Cleanup for #3399
• 6fe3645 Add allow-list for #3399, update URL
• 3840870 v3.0.0-beta.2
• 399a0f3 Bump eslint from 9.10.0 to 9.11.1 (#3466)
• dae40c4 Bump sass from 1.79.3 to 1.79.4 (#3465)
• Additional commits viewable in compare view

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