Generic Prop Type is incompatible with defineModel and Typed Slots

[sxzz]

Reproduction: https://github.com/artsmp0/vue-generic-type-bug

See src/components/HelloWorld.vue and src/components/model-with-props-bug.vue.

[so1ve]

Found a bug here:

It seems to be buggy here 👆

If we add a type assertion

It works perfectly.

[so1ve]

Hi @pikax, could you please confirm if it is a vue core issue? The BooleanKey type does not play well with generics.

[pikax]

BooleanKey does not play nicely with generics as you can see the fix to work with withDefault was to remove that https://github.com/vuejs/core/pull/8335/files

For me (not that familiar with Language Tools) this is a bug with Language tools looking at the generated code (after update the dependencies):

// 当使用 defineModel 时，在模板中访问 msg 报错
const count = defineModel<number>("count", {
  local: true,
  default: 999,
});
const __VLS_publicComponent = (await import('vue')).defineComponent({
props: {} as { 
"count": import('vue').PropType<number>,
},
props: ({} as __VLS_TypePropsToRuntimeProps<typeof __VLS_props>),
setup() {
return {
};
},
});

props is declared twice instead of merged in.

[johnsoncodehk]

Duplicate of #3164