Version

3.0.0

Reproduction link

github.com

Steps to reproduce

npm run serve npm run serve:prd

What is expected?

The button should be triggered in both environments

What is actually happening?

In dev environment, button be triggered

the code like：

< template >
  < button  v-operate:add >button< /button >
< /template >

<script setup>
const add = () =>{
  console.log('click trigger')
}
</script>

app.directive("operate", {

    mounted(el, binding) {

        const { arg, instance, value } = binding;

        console.log(binding);

        const { param } = value || {};

        if (!instance?.[arg]) {

            console.log('not exist ')

            return;

        }

        el.addEventListener('click', instance[arg].bind(instance, param));
    },
})

There is no add event defined by me on instance, but it exists in dev environment

<script setup>
const add = () =>{
  console.log('click trigger')
}
defineExpose({
  add,
})
</script>

See: https://v3.vuejs.org/api/sfc-script-setup.html#defineexpose

The source of the difference in behavior is the same as #4980 so I'll close this one as a duplicate.

@LinusBorg I've used this method before, but it doesn't work

Seems we expose the wrong proxy here.