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bug: legacy polyfill causes OOM in vitest

ionitron: needs reproductionThis PR or Issue does not have a reproduction case URLThis PR or Issue does not have a reproduction case URL

Status: Open.

#6541 In stenciljs/core;

· gmarinov opened on Jan 10, 2026

feat: StencilJS MCP Server

Feature: Want this? Upvote it!This PR or Issue may be a great consideration for a future idea.This PR or Issue may be a great consideration for a future idea.

Help Wanted

Status: Open.

Feature

#6518 In stenciljs/core;

· MrGrigri opened on Dec 30, 2025

chore: rename <code>cmp.test.tsx</code> files in <code>wdio</code> directory to have unique names for debugging purposes

Good First IssueThis is a good first issue for someone wantng to contribute to Stencil!This is a good first issue for someone wantng to contribute to Stencil!

Help Wanted

Status: Open.

#6407 In stenciljs/core;

· jttommy opened on Oct 2, 2025

bug: slotted content not rendering in WebKit

Awaiting ReplyThis PR or Issue needs a reply from the original reporter.This PR or Issue needs a reply from the original reporter.

Bug: ValidatedThis PR or Issue is verified to be a bug within StencilThis PR or Issue is verified to be a bug within Stencil

Help Wanted

Status: Open.

#6262 In stenciljs/core;

· tomherni opened on May 23, 2025

Error when running Vitest

ionitron: needs reproductionThis PR or Issue does not have a reproduction case URLThis PR or Issue does not have a reproduction case URL

Status: Open.

Bug

#6209 In stenciljs/core;

· apoorvarajan opened on Mar 18, 2025

bug: Stencil Generated components.d.ts Missing Kebab-Case Property Typings in HTML Element Interfaces

Status: Open.

#6194 In stenciljs/core;

· BenjaminBrossi opened on Mar 12, 2025

Road to v5 🚀

Stencil v5This is slated for Stencil v5 (Release date TBD)This is slated for Stencil v5 (Release date TBD)

Status: Open.

Task

#6185 In stenciljs/core;

· christian-bromann opened on Mar 3, 2025

·  

v5

bug: type definition of <code>h()</code> function does not match implementation.

Bug: ValidatedThis PR or Issue is verified to be a bug within StencilThis PR or Issue is verified to be a bug within Stencil

Help Wanted

Status: Open.

#6181 In stenciljs/core;

· trusktr opened on Mar 2, 2025

bug: e2e tests failing randomly

Bug: ValidatedThis PR or Issue is verified to be a bug within StencilThis PR or Issue is verified to be a bug within Stencil

Help Wanted

ionitron: needs reproductionThis PR or Issue does not have a reproduction case URLThis PR or Issue does not have a reproduction case URL

Status: Open.

#6157 In stenciljs/core;

· danyball opened on Feb 13, 2025

feat: add possibility for security SRI/integrity attribute

Help Wanted

Status: Open.

#6132 In stenciljs/core;

· danyball opened on Jan 30, 2025

bug: Slot-Fallback hidden when newlines exists

Request For CommentsSeeking commentary on an issue or PR from the communitySeeking commentary on an issue or PR from the community

Status: Open.

#6129 In stenciljs/core;

· dutscher opened on Jan 29, 2025

bug: Prop() is mutable despite what it says in the docs

Resolution: RefineThis PR is marked for Jira refinement. We're not working on it - we're talking it through.This PR is marked for Jira refinement. We're not working on it - we're talking it through.

Status: Open.

#6006 In stenciljs/core;

· rramsey opened on Oct 2, 2024