Using a javascript component in vue.js with typescript - a step-by-step guide!

I have created a component in one project and now I want to make it accessible for use in another project. This is how I am currently exposing it:

import ToastNotification from '../ToastNotification';
import Api from './api';

const VueToast = (Vue, options = {}) => {
  const methods = Api(Vue, options);
  Vue.$toast = methods;
  Vue.prototype.$toast = methods;
};

ToastNotification.install = VueToast;

export default ToastNotification;

In my index.js file I declare :

import VueToast from './toast/js/index';

Vue.use(VueToast);

However, when I npm install this project as a library in another project, the line this.$toast('message') is not recognized and shows an error, stating "Property '$toast' does not exist on type ''".

Interestingly, I was able to use 'this.$toast('')' within the original project, but facing issues when trying to do so in a different project. The component is built using Vue.js and JavaScript and I am attempting to integrate it into a TypeScript-supported Vue.js project.

I have also tried declaring it in the main.ts file of my project, but the issue persists:

import VueToast from'/src/components/toast/js/index';

Vue.use(VueToast);

Can you suggest what may be missing or needs to be declared differently?

typescriptvue.jsvue-component

Answer №1

If you want to include the $toast function in your Vue component instance, you can define the necessary type augmentation by following these steps in a .d.ts file (e.g., create a new file named custom-types.d.ts):

For Vue 2:

import Vue from 'vue'

declare module 'vue/types/vue' {
  interface Vue {
    $toast: (msg: string) => void;
  }
}

export {}

For Vue 3:

declare module '@vue/runtime-core' {
  interface ComponentCustomProperties {
    $toast: (msg: string) => void;
  }
}

export {}

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