Unlocking the Potential of Vue Class Components: Exploring Advanced Customization Options

Currently, I am working on a project using Vue 2 with Typescript. However, I am facing an issue where I cannot add options to the component.

<script lang="ts">
import { Component, Vue } from "vue-property-decorator";
import HelloWorld from "@/components/HelloWorld.vue"; // @ is an alias to /src

@Component<Home>({
  components: {
    HelloWorld,
  },

  middleware: "yyy",
})
export default class Home extends Vue {
  mounted() {
    console.log(this.middleware);
  }
}
</script>

I am getting 'undefined' as the output!

In my search for a solution, I came across a similar problem and attempted to resolve it, but unfortunately, I still have not achieved the desired result.

Visit this link for more information about extending Component options

This is my src\shims-vue.d.ts file:

declare module "*.vue" {
  import Vue from "vue";
  export default Vue;
}
declare module "vue/types/vue" {
  interface Vue {
    middleware?: string;
  }
}

declare module "vue/types/options" {
  interface ComponentOptions<V extends Vue> {
    middleware?: string;
  }
}

Answer №1

To fix your type declaration, ensure you import Vue in your code:

// shims-vue.d.ts
import Vue from 'vue' 👈

declare module "vue/types/options" {
  interface ComponentOptions<V extends Vue> {
    middleware?: string;
  }
}

When referencing the option in your component, remember to use this.$options.middleware instead of this.middleware:

export default class Home extends Vue {
  mounted() {           👇
    console.log(this.$options.middleware);
  }
}

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