Issues

• bug: SSR <style> of components without encapsulation has no sty-id, so hydration inserts every sheet a second time

  Bug

  stenciljs/core#6947 · Filter by author kbudasov opened on Oct 11, 2026

• bug: changing a watched native attribute before a lazy component's instance exists throws

  Bug

  stenciljs/core#6945 · Filter by author addahlbe opened on Oct 11, 2026
  1

• bug: CSS custom property documentation disappears after TypeScript edits in watch mode

  Bug

  stenciljs/core#6939 · Filter by author nirazul opened on Oct 9, 2026

• bug: spec tests crash with Cannot read properties of undefined (reading 'text') when a component extends an imported class that itself extends another class

  Bug

  stenciljs/core#6936 · Filter by author deleonio opened on Oct 8, 2026

• bug: SSR content rendered into another non-shadow component's default slot is hidden after hydration (regression in 4.41.0)

  Bug

  stenciljs/core#6934 · Filter by author kbudasov opened on Oct 7, 2026

• bug: scoped SSR hydration reorders children when the child is defined first

  Bug

  stenciljs/core#6926 · Filter by author wessmeister opened on Oct 1, 2026

• feat: Remove discrepancy between formAssociated bool resolving and normal bool Props

  Stencil v5
  Feature

  stenciljs/core#6906 · Filter by author FabioGimmillaro opened on Sep 24, 2026
  1

• feat: support clonable in the shadow option of @Component

  Stencil v5
  Feature

  stenciljs/core#6833 · Filter by author kauricre opened on Aug 18, 2026
  2

• bug: @stencil/store stops re-rendering components when the store is created from globalScript code (since 4.33.0)

  Bug: ValidatedStencil v5
  Bug

  stenciljs/core#6798 · Filter by author CalinaCristian opened on Jul 31, 2026
  1

• feat: avoid re-evaluating the hydrate platform closure on every SSR render

  Feature: Want this? Upvote it!
  Feature

  stenciljs/core#6793 · Filter by author Armand-Lluka opened on Jul 27, 2026
  1

• feat(runtime): opt-out for per-prop componentShouldUpdate firing (4.42+)

  Stencil v5
  Feature

  stenciljs/core#6759 · Filter by author maisasb opened on Jun 24, 2026
  2

• bug: incompatible value of this used for getters/setters during SSR hydration

  Bug: Validated
  Bug

  stenciljs/core#6749 · Filter by author kyleMessnerLillyContractor opened on Jun 5, 2026

• Streaming SSR: declarative shadow DOM conflicts with attachShadow in the constructor

  Bug: Validated
  Bug

  stenciljs/core#6690 · Filter by author henrijoss opened on Apr 27, 2026
  2

• Stencil FOUC styles should use @layer to avoid cascade conflicts with React 19

  Stencil v5
  Feature

  stenciljs/core#6649 · Filter by author estevaolucas opened on Mar 25, 2026

• Using a StencilJS output in another StencilJS project

  Stencil v5
  Feature

  stenciljs/core#6641 · Filter by author ThornWalli opened on Mar 16, 2026

• feat: support for scoped custom element registries

  Stencil v5
  Feature

  stenciljs/core#6638 · Filter by author mpesic opened on Mar 12, 2026

• bug: Styles not rendered, gone from the DOM due to 3rd party framework interference (svelte/sveltekit)

  stenciljs/core#6637 · Filter by author mt3o opened on Mar 12, 2026
  1

• bug: component's child initial timing leads to unexpected behavior

  Bug: ValidatedStencil v5
  Bug

  stenciljs/core#6636 · Filter by author danyball opened on Mar 11, 2026
  1

• bug: dist-custom-elements do not output global styles

  Stencil v5
  Feature

  stenciljs/core#6630 · Filter by author dogoku opened on Mar 5, 2026
  3

• feat: support for referenceTarget shadow DOM feature

  Feature: Want this? Upvote it!Stencil v5
  Feature

  stenciljs/core#6626 · Filter by author Noleli opened on Mar 3, 2026

• bug: Jest 30 Support: Documentation Claims Support but Version Check Blocks It

  Stencil v5
  stenciljs/core#6599 · Filter by author michaelsouellette opened on Feb 16, 2026
  1

• v5 Breaking Changes Proposals / Discussion

  stenciljs/core#6584 · Filter by author johnjenkins opened on Feb 4, 2026 · v5
  35

• feat: Upgrade to Node v24

  Stencil v5
  stenciljs/core#6578 · Filter by author Avcharov opened on Feb 2, 2026

• Problems with @stencil/core@>4.38.3 + @stencil/playwright@0.2.1

  ionitron: needs reproduction
  Bug

  stenciljs/core#6562 · Filter by author deleonio opened on Jan 22, 2026
  11

• bug: Two-way binding broken between Angular template-driven forms and Stencil

  ionitron: needs reproduction
  Bug

  stenciljs/core#6554 · Filter by author fredppro opened on Jan 16, 2026
  1