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V5 WIP - do not merge#6657

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johnjenkins wants to merge 236 commits into
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v5
Draft

V5 WIP - do not merge#6657
johnjenkins wants to merge 236 commits into
mainfrom
v5

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@johnjenkins johnjenkins commented Mar 29, 2026

Description

This is the main branch for the upcoming V5 release. Choc full of new things and some breaking changes

Things it'll address and close

Fixes #6641
Closes #6578
Fixes #6630
Fixes #5306
Closes #6599
Closes #5307
Closes #6107
Closes #4232

Documentation

Does this introduce a breaking change?

  • Yes
  • No

Testing

Other information

johnjenkins and others added 30 commits May 1, 2026 14:17
* chore: rename all the 'hydrate' things to 'ssr'

* chore:

* chore:

* chore:
* chore: standalone hmr

* chore: tagname change reload fixes

* chore:

* chore:
* chore: tidy up standalone types

* chore: fix default asset handling

* chore: tidy

* chore:
* fix(types): add referrerPolicy to ImgHTMLAttributes (#6694)

Mirror the existing declarations on AnchorHTMLAttributes and
IframeHTMLAttributes so <img referrerpolicy="..."> type-checks
without an `as any` cast. The ReferrerPolicy type is provided
by the TypeScript DOM lib; no runtime impact.

fixes: #6692

* chore(deps-dev): bump postcss from 8.5.6 to 8.5.13 (#6699)

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.6 to 8.5.13.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.6...8.5.13)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.13
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* chore: swap out deps

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: Per Fryking <per.fryking@lime.tech>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
* chore: fix up jsx-runtime and use in tests

* chore: revert bundle-size test for now
* chore: fix up jsx-runtime and use in tests

* chore: revert bundle-size test for now

* chore: v5 squish runtime
* chore: rv `shadowDomShim`, `attachStyles` and `extras.experimentalScopedSlotChanges`

* chore: fixup rolldown error handling types

* chore: remove TODO 16 and 958

* chore: tackle TODO 1299. Serialize node attr audit

* chore: address / assess TODOs 728, 898, 1076, 461

* chore: address 1005, improving worker interface types

* chore: fix TODO 345. Reconciled MockWindow with Window

* chore: fix hmr TODO - clean up event listeners

* chore: fix TODO 419, type handling for resolved types vs template literals

* chore: close TODO 462, 463, 464. Implement `createTestCompiler` to mock / stub all compiler things. Compiler tests now re-added!

* chore: close TODO 914. Rename slot fixes and default to true

* chore: format

* chore: add non-shadow build-size test

* chore: close TODO 854. Remove `needsShadowDom` flag

* chore: close rest of TODOs!

* chore: speed up compiler tests

* chore:

* chore: fix ssr tests

* chore: fix cloneNode bug

* chore:

* chore:

* chore:

* chore:
* chore: more build size testing

* chore:

* chore:
)c

* chore: swap out custom node patching for jiti (config ts reading)

* chore: properly handle default esm exports
* chore: rv insertAdjacentText & insertAdjacentElement patches

* chore: optimize client-hydrate

* chore: fiddling
* chore: rv insertAdjacentText & insertAdjacentElement patches

* chore: optimize client-hydrate

* chore: fiddling

* chore: v5 enableImportInjection true by default

* chore:
…ets (#6714)

* chore: v5 move hash* settings to loader and www output settings

* chore: fix migrations to read from ancestor stencil.configs
…tml) (#6716)

* chore: v5 www output now handles all html files (not just src/index.html)

* chore: usa, usa :D

* chore:
…ions (#6720)

* feat: v5 retain build flags in external runtimes and imported collections

* chore:

* chore:
…vs (#6722)

* feat: v5 swap-out node stream for `ReadableStream` to work in edge envs

* chore:

* chore: update test

* chore:
* feat: v5 new ssr-wasm output
* feat: v5 inject stencil hydrate css into global-style

* chore: more testing
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