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breaking: remove Node polyfills#15430

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breaking: remove Node polyfills#15430
teemingc merged 3 commits into
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chore-remove-polyfills

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@teemingc teemingc commented Feb 26, 2026

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closes #15258

This PR removes the export @sveltejs/kit/node/polyfills and the shims from the node and netlify adapter. They were only needed while we still supported Node 18


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🦋 Changeset detected

Latest commit: e699bdc

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package
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@sveltejs/kit Major

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Click here if you're a maintainer who wants to add another changeset to this PR

@teemingc teemingc linked an issue Feb 26, 2026 that may be closed by this pull request
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teemingc commented Feb 26, 2026

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The docs are failing to build because https://svelte.dev/docs/kit/modules links to the now non-existent Node polyfill docs. We'll need to remove that reference sveltejs/svelte.dev#1820

Comment thread .changeset/many-jeans-feel.md Outdated
@teemingc teemingc merged commit ba36148 into version-3 Feb 26, 2026
18 of 19 checks passed
@teemingc teemingc deleted the chore-remove-polyfills branch February 26, 2026 13:38
Rich-Harris pushed a commit that referenced this pull request Jun 5, 2026
This PR was opened by the [Changesets
release](https://github.com/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and the packages will
be published to npm automatically. If you're not ready to do a release
yet, that's fine, whenever you add more changesets to version-3, this PR
will be updated.

⚠️⚠️⚠️⚠️⚠️⚠️

`version-3` is currently in **pre mode** so this branch has prereleases
rather than normal releases. If you want to exit prereleases, run
`changeset pre exit` on `version-3`.

⚠️⚠️⚠️⚠️⚠️⚠️

# Releases
## @sveltejs/adapter-auto@8.0.0-next.0

### Major Changes


- breaking: require SvelteKit 3
([#15506](#15506))


### Patch Changes

- Updated dependencies
[[`fa335bd`](fa335bd),
[`3031d89`](3031d89),
[`cb9d416`](cb9d416),
[`caf3a18`](caf3a18),
[`4777827`](4777827),
[`a2792e2`](a2792e2),
[`ba36148`](ba36148),
[`48e8710`](48e8710),
[`e2f3075`](e2f3075),
[`047d6a0`](047d6a0),
[`87603d1`](87603d1),
[`096962c`](096962c),
[`d545970`](d545970),
[`e2f3075`](e2f3075),
[`d06affc`](d06affc),
[`8af47eb`](8af47eb),
[`e2f3075`](e2f3075),
[`5c4d130`](5c4d130),
[`3f11f35`](3f11f35),
[`caf3a18`](caf3a18),
[`8823037`](8823037),
[`1d76212`](1d76212),
[`0dc0548`](0dc0548),
[`00d81fa`](00d81fa)]:
  - @sveltejs/kit@3.0.0-next.0
## @sveltejs/adapter-cloudflare@8.0.0-next.0

### Major Changes


- breaking: upgrade `@cloudflare/workers-types` to 4.20260219.0
([#15347](#15347))


- breaking: upgrade minimum `wrangler` version to ^4.67.0
([#15347](#15347))


- breaking: remove `platform.context` in favour of `platform.ctx`
([#15347](#15347))


- breaking: require SvelteKit 3
([#15506](#15506))


### Patch Changes


- chore: check the `WORKERS_CI` environment variable to determine if
we're building for Cloudflare Workers
([#13733](#13733))

- Updated dependencies
[[`fa335bd`](fa335bd),
[`3031d89`](3031d89),
[`cb9d416`](cb9d416),
[`caf3a18`](caf3a18),
[`4777827`](4777827),
[`a2792e2`](a2792e2),
[`ba36148`](ba36148),
[`48e8710`](48e8710),
[`e2f3075`](e2f3075),
[`047d6a0`](047d6a0),
[`87603d1`](87603d1),
[`096962c`](096962c),
[`d545970`](d545970),
[`e2f3075`](e2f3075),
[`d06affc`](d06affc),
[`8af47eb`](8af47eb),
[`e2f3075`](e2f3075),
[`5c4d130`](5c4d130),
[`3f11f35`](3f11f35),
[`caf3a18`](caf3a18),
[`8823037`](8823037),
[`1d76212`](1d76212),
[`0dc0548`](0dc0548),
[`00d81fa`](00d81fa)]:
  - @sveltejs/kit@3.0.0-next.0
## @sveltejs/adapter-netlify@7.0.0-next.0

### Major Changes


- chore: use `rolldown` for edge function bundling
([#15432](#15432))


- breaking: write output that conforms to the stable [Netlify Frameworks
API](https://docs.netlify.com/build/frameworks/frameworks-api/).
([#15294](#15294))
  
Deploying and previewing with Netlify CLI now requires
[v17.31.0](https://github.com/netlify/cli/releases/tag/v17.31.0) or
later. Run `npm i -g netlify-cli@latest` to upgrade.

- breaking: require SvelteKit 3
([#15506](#15506))


- breaking: edge function build target is now `es2022`
([#15432](#15432))


### Patch Changes

- Updated dependencies
[[`fa335bd`](fa335bd),
[`3031d89`](3031d89),
[`cb9d416`](cb9d416),
[`caf3a18`](caf3a18),
[`4777827`](4777827),
[`a2792e2`](a2792e2),
[`ba36148`](ba36148),
[`48e8710`](48e8710),
[`e2f3075`](e2f3075),
[`047d6a0`](047d6a0),
[`87603d1`](87603d1),
[`096962c`](096962c),
[`d545970`](d545970),
[`e2f3075`](e2f3075),
[`d06affc`](d06affc),
[`8af47eb`](8af47eb),
[`e2f3075`](e2f3075),
[`5c4d130`](5c4d130),
[`3f11f35`](3f11f35),
[`caf3a18`](caf3a18),
[`8823037`](8823037),
[`1d76212`](1d76212),
[`0dc0548`](0dc0548),
[`00d81fa`](00d81fa)]:
  - @sveltejs/kit@3.0.0-next.0
## @sveltejs/adapter-node@6.0.0-next.0

### Major Changes


- chore: migrate from rollup to rolldown
([#15297](#15297))


- breaking: require SvelteKit 3
([#15506](#15506))


### Patch Changes

- Updated dependencies
[[`fa335bd`](fa335bd),
[`3031d89`](3031d89),
[`cb9d416`](cb9d416),
[`caf3a18`](caf3a18),
[`4777827`](4777827),
[`a2792e2`](a2792e2),
[`ba36148`](ba36148),
[`48e8710`](48e8710),
[`e2f3075`](e2f3075),
[`047d6a0`](047d6a0),
[`87603d1`](87603d1),
[`096962c`](096962c),
[`d545970`](d545970),
[`e2f3075`](e2f3075),
[`d06affc`](d06affc),
[`8af47eb`](8af47eb),
[`e2f3075`](e2f3075),
[`5c4d130`](5c4d130),
[`3f11f35`](3f11f35),
[`caf3a18`](caf3a18),
[`8823037`](8823037),
[`1d76212`](1d76212),
[`0dc0548`](0dc0548),
[`00d81fa`](00d81fa)]:
  - @sveltejs/kit@3.0.0-next.0
## @sveltejs/adapter-static@4.0.0-next.0

### Major Changes


- breaking: require SvelteKit 3
([#15506](#15506))


### Patch Changes

- Updated dependencies
[[`fa335bd`](fa335bd),
[`3031d89`](3031d89),
[`cb9d416`](cb9d416),
[`caf3a18`](caf3a18),
[`4777827`](4777827),
[`a2792e2`](a2792e2),
[`ba36148`](ba36148),
[`48e8710`](48e8710),
[`e2f3075`](e2f3075),
[`047d6a0`](047d6a0),
[`87603d1`](87603d1),
[`096962c`](096962c),
[`d545970`](d545970),
[`e2f3075`](e2f3075),
[`d06affc`](d06affc),
[`8af47eb`](8af47eb),
[`e2f3075`](e2f3075),
[`5c4d130`](5c4d130),
[`3f11f35`](3f11f35),
[`caf3a18`](caf3a18),
[`8823037`](8823037),
[`1d76212`](1d76212),
[`0dc0548`](0dc0548),
[`00d81fa`](00d81fa)]:
  - @sveltejs/kit@3.0.0-next.0
## @sveltejs/adapter-vercel@7.0.0-next.0

### Major Changes


- chore: use `rolldown` for edge function bundling
([#15432](#15432))


- breaking: edge function build target is now `es2022`
([#15432](#15432))


### Patch Changes

- Updated dependencies
[[`fa335bd`](fa335bd),
[`3031d89`](3031d89),
[`cb9d416`](cb9d416),
[`caf3a18`](caf3a18),
[`4777827`](4777827),
[`a2792e2`](a2792e2),
[`ba36148`](ba36148),
[`48e8710`](48e8710),
[`e2f3075`](e2f3075),
[`047d6a0`](047d6a0),
[`87603d1`](87603d1),
[`096962c`](096962c),
[`d545970`](d545970),
[`e2f3075`](e2f3075),
[`d06affc`](d06affc),
[`8af47eb`](8af47eb),
[`e2f3075`](e2f3075),
[`5c4d130`](5c4d130),
[`3f11f35`](3f11f35),
[`caf3a18`](caf3a18),
[`8823037`](8823037),
[`1d76212`](1d76212),
[`0dc0548`](0dc0548),
[`00d81fa`](00d81fa)]:
  - @sveltejs/kit@3.0.0-next.0
## @sveltejs/enhanced-img@1.0.0-next.0

### Major Changes


- breaking: require Node 22 or newer
([#12548](#12548))


### Minor Changes


- breaking: require Vite 8 and `vite-plugin-svelte` 7
([#15542](#15542))
## @sveltejs/kit@3.0.0-next.0

### Major Changes


- breaking: TypeScript 6 is now the minimum required version
([#15930](#15930))


- breaking: upgrade to cookie v1. Cookie names must now contain only
ASCII characters ([#13386](#13386))


- breaking: require Node 22 or newer
([#12548](#12548))


- breaking: remove the `preloadStrategy` option. `modulepreload` will
always be used ([#15256](#15256))


- breaking: default the cookie `path` option to `'/'`
([#15398](#15398))


- breaking: remove `@sveltejs/kit/node/polyfills`
([#15430](#15430))


- breaking: add `config.kit.output.linkHeaderPreload` to preload using
the `Link` header ([#15939](#15939))


- breaking: require `@sveltejs/vite-plugin-svelte` v7
([#15371](#15371))


- breaking: remove `createEntries` from the `Builder` object passed to
adapter functions ([#15509](#15509))


- breaking: remove the deprecated CSRF `checkOrigin` option in favor of
`trustedOrigins` ([#15437](#15437))


- breaking: the `delta` property now only exists for `popstate`
navigation events ([#15522](#15522))


- breaking: remove deprecated `pragma` header in version polling for
improved CORS support
([#15428](#15428))


- breaking: require Svelte 5.48.0 or newer
([#15371](#15371))


- chore: change `error`, `isHttpError`, `redirect`, and `isRedirect` to
refer to public type instead of internal class
([#15250](#15250))


- breaking: require Vite 8. Provides new functionality even for existing
Vite 8 users such as faster builds with Vite hook filters and more
powerful SvelteKit adapters with the Vite environment API
([#15371](#15371))


- breaking: remove `data-sveltekit-*` option `'off'` in favour of
`false` ([#15907](#15907))


### Minor Changes


- feat: resolve paths using the Vite config `root` option instead of
`process.cwd()` to better support monorepo configurations such as Vitest
workspaces ([#15469](#15469))


- chore: deprecate `Response` helpers in favor of platform-provided
alternatives ([#15448](#15448))


- feat: explicit env vars
([#15934](#15934))


### Patch Changes


- fix: remove check for svelte.config.js before running `sync`
([#15946](#15946))


- fix: generate a placeholder tsconfig.json to squelch sync-time
warnings ([#15948](#15948))


- chore: remove dependency on kleur
([#12548](#12548))


- chore: remove dependency on `set-cookie-parser`
([#15384](#15384))


- fix: allow use of `$app/env/public` in service workers
([#15950](#15950))
## @sveltejs/package@3.0.0-next.0

### Major Changes


- breaking: require Node 22 or newer
([#12548](#12548))


### Patch Changes


- chore: remove dependency on kleur
([#12548](#12548))

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
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Remove Node global polyfills

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