Resolve “Property does not exist on type ‘Vue'” error

I had the same problem but with exporting a component.
Some vs code snippets create templates without necessary types like this below

export default {
  data() {
    return {
      x: "something",
    };
  },
  methods: {
    rename(name: string) {
      this.x = name;
    },
    
  },
};

The problem was I did not add defineComponent() to export default. So should be

import { defineComponent } from "vue";

export default defineComponent({
  data() {
    return {
      x: "something",
    };
  },
  methods: {
    rename(name: string) {
      this.x = name;
    },
    
  },
});

Make sure you are exporting the component with the defineComponent() function.