Version

3.2.20

Reproduction link

sfc.vuejs.org

Steps to reproduce

Open SFC

What is expected?

no warning to be logged as component defined onNewValue prop

What is actually happening?

warning in console:

Component emitted event "new-value" but it is neither declared in the emits option nor as an "onNew-value" prop.

Having a component that emits a kebab-cased event (e.g. new-value as in Quasar's QSelect), you see the following warning:

Component emitted event "new-value" but it is neither declared in the emits option nor as an "onNew-value" prop.

The component actually defines a prop named onNewValue - without listing new-value in the component's emits property.

It looks like this is due to the toHandlerKey helper only capitalizes the event name - which then only converts the first character to UPPERCASE.

Conventions done't allow non-camelized properties - so I think the toHandlerKey actually needs to capitalize(camelize(str))

I tested your code outside of the SFC and there is no warning at all. Are you sure you were not using defineEmits()?

updated SFC

sorry for the failing SFC earlier

I can reproduce this, but I see there is already a PR :tada: Is it planned to get released soon?