In Vue custom element, Boolean prop with default true cannot be updated to falsy value

[lejunyang]

Vue version

3.5.12

Link to minimal reproduction

https://play.vuejs.org/#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

Steps to reproduce

click the buttons from left to right, observe the texts

What is expected?

Behavior of props default value in vue custom element should be same as in Vue component

What is actually happening?

We can see that boolean prop is always true in vue custom element no matter we set false, null, undefined or empty string, while in Vue component, false and null will be as it is, null, undefined and empty string will be default value

System Info

No response

Any additional comments?

No response