Vue version

3.3.4

Link to minimal reproduction

https://github.com/rodrigocfd/vue-bug-generic

Steps to reproduce

When using the verbose syntax of component v-model, when the argument is a generic parameter, the parent component won't type the argument, which will appear as any. Reproducible example below.

• Child component:

<script setup lang="ts" generic="T">
const props = defineProps<{
    modelValue: T;
}>();

const emit = defineEmits<{
    'update:modelValue': [value: T];
}>();
</script>

<template>
    Hi
</template>

• Parent component:

<script setup lang="ts">
import {ref} from 'vue';
import Child from './Child.vue';

const name = ref('Evan');
</script>

<template>
    <Child :modelValue="name"
        @update:modelValue="v => name = v" />
</template>

What is expected?

The argument properly typed, not any, thus no error reporting.

What is actually happening?

The following error message:

> bug-repro@1.0.0 ok
> vue-tsc --noEmit

src/Parent.vue:10:23 - error TS7006: Parameter 'v' implicitly has an 'any' type.

10   @update:modelValue="v => name = v" />
                         ~


Found 1 error in src/Parent.vue:10

Also, Volar in VSCode reports the same error:

System Info

System:
    OS: Windows 10 10.0.19045
    CPU: (12) x64 Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz
    Memory: 13.36 GB / 31.95 GB
  Binaries:
    Node: 18.14.1 - C:\Program Files\Nodejs\node.EXE
    npm: 9.7.1 - C:\Program Files\Nodejs\npm.CMD
  Browsers:
    Chrome: 114.0.5735.134
    Edge: Spartan (44.19041.1266.0)
    Internet Explorer: 11.0.19041.1566
  npmPackages:
    vue: ^3.3.4 => 3.3.4

Any additional comments?

No response

I guess it should be moved to https://github.com/vuejs/language-tools /cc @johnsoncodehk

This has been fixed at some point... I can't reproduce the bug anymore.

So, I'm closing it.