bug: Component types missing when consumed from Stencil

[LeviticusMB]

Prerequisites

• I have read the Contributing Guidelines.
• I agree to follow the Code of Conduct.
• I have searched for existing issues that already report this problem, without success.

Ionic Framework Version

v8.x

Current Behavior

I have a Stencil project where I consume @ionic/core. Starting with 8.2.9, the types for ion-* elements in the TSX files are no longer available. If I downgrade to 8.2.8, all is good.

When hovering in VS Code:

• 8.2.8: (property) LocalJSX.IntrinsicElements["ion-item"]: LocalJSX.IonItem & JSXBase.HTMLAttributes<HTMLIonItemElement>
• 8.2.9: (index) IntrinsicElements[string]: any

And the project won't compile because of Parameter 'ev' implicitly has an 'any' type. on all event handlers.

Expected Behavior

Types should be available.

Steps to Reproduce

1. npm init stencil
2. Select ionic-pwa [community]
3. cd into project, npm install
4. Inspect elements in VS Code. (IntrinsicElements[string]: any)
5. npm i @ionic/core@8.2.8
6. Inspect elements in VS Code. (LocalJSX.IntrinsicElements["ion-..."]:)
7. npm i @ionic/core@8.2.9
8. Inspect elements in VS Code. (IntrinsicElements[string]: any)

Code Reproduction URL

Ionic Info

npm 10.9.2
node 23.11.0
@ionic/core 8.2.9
@stencil/core 4.36.3

Additional Information

No response

[LeviticusMB]

I dug some more and found that if I match my version of stencil exactly to what Ionic happened to use for a specific release, it seems to work:

• Ionic 8.6.7: Stencil 4.33.1
• Ionic 8.7.0: Stencil 4.33.1
• Ionic 8.7.1: Stencil 4.36.2
• Ionic 8.7.3 (latest as of today): Stencil 4.36.2.

The latest Stencil is 4.36.3, released a week ago. That version won't work with the latest Ionic. Downgrade it a single patch release, and it starts to work.

Semver anyone? What a mess.