Version

3.2.0-beta.4

Reproduction link

example

Steps to reproduce

add a webcomponent into a vue app with attributes add the rule to main see

https://v3.vuejs.org/guide/migration/global-api.html#config-ignoredelements-is-now-config-compileroptions-iscustomelement

but you get

What is expected?

Vue ignore the element

What is actually happening?

looks like the isCustomElement is complete ignored

And last but not least how to use this with defineCustomeElement ? this is not really clear to me thx for your help

Stackblitz doesn't seem to be using the actual vue-cli since when I clone the project locally the dependencies aren't even correct. e.g. it doesn't even have @vue/compiler-sfc in the dependencies list. It seems to be emulating what vue-cli does in their custom in-browser setup while pretending to be a vue-cli project.

The config works as expected in an actual vue-cli project.