# componentCorePackage not defined in ReactOutputTargetOption

**URL:** <https://forum.ionicframework.com/t/componentcorepackage-not-defined-in-reactoutputtargetoption/243811>\
**Category:** Stencil\
**Created:** [August 23, 2024, 5:03pm UTC](https://forum.ionicframework.com/t/componentcorepackage-not-defined-in-reactoutputtargetoption/243811 "2024-08-23T17:03:18Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![mdellanave](https://avatars.discourse-cdn.com/v4/letter/m/7993a0/32.png) [@mdellanave](https://forum.ionicframework.com/u/mdellanave)\
**Post date:** [August 23, 2024, 5:03pm UTC](https://forum.ionicframework.com/t/componentcorepackage-not-defined-in-reactoutputtargetoption/243811/1 "2024-08-23T17:03:19Z")

</div>

Hi,  
I’m having trouble following this guide [React Integration with Stencil | Stencil](https://stenciljs.com/docs/react)

I think there’s something wrong because I have this warning from vs code

 ![image](https://global.discourse-cdn.com/ionicframework/original/3X/a/e/ae8fc139efbb2856248b75ea04d3cf29abf93af9.png)

There’s also an undefined folder but I don’t know why

 ![image](https://global.discourse-cdn.com/ionicframework/original/3X/1/3/13786945de25b6270b41bf63b4435d87b2860310.png)

Do you guys have some ideas?