[2.7.x] [typescript] Type augmentation does not work #12642
Description
Version
2.7.4
Reproduction link
Steps to reproduce
look at the example repo, or, install vue@2.7.4 and add type augmentation:
// env.d.ts declare module "vue/types/vue" { interface Vue { $t: (s: string) => string } }// broken-augment.ts import {defineComponent} from "vue"; export default defineComponent({ methods: { getTranslatedText() { return this.$t("hello.vue"); }, }, });What is expected?
Expected no erros.
What is actually happening?
> pnpm vue-tsc src/broken-augment.ts:6:14 - error TS2571: Object is of type 'unknown'. 6 return this.$t("hello.vue"); ~~~~~~~ Found 1 error in src/broken-augment.ts:6