Create a Props TypeScript interface within a Vue.js class Component

Is there a way to declare a Typescript interface Props in a Vue.js class Component similar to how it's done with React Component?

Here is an example code snippet:

import {Component, Prop, Vue} from 'vue-property-decorator'

export class Props extends Vue
{
  classElement :string
}

@Component
export default class Menu extends Vue<Props>
{
    public props :Props;

    constructor(props)
    {
        super(props);
        console.log(props); // returns undefined 
    }

    mounted()
    {
      console.log(this.props.classElement); // returns undefined
    }
}

Answer №1

Utilize {type: Object as () => User} within a Prop() decorator to define the type of object in your Vue component:

import Vue from 'vue'
import { Component, Prop } from 'vue-property-decorator'

import User from './models/user';

@Component()
export default class Menu extends Vue
{    

    @Prop({type: Object as () => User})
    public user!: User // using bang to suppress compiler warning for no initial value

    mounted(){
      console.log(this.user);
    }

}

Answer №2

Moreover, a new feature has been introduced allowing the use of Typescript type PropType.

import Vue, { PropType } from 'vue'
import { Component, Prop } from 'vue-property-decorator'

import User from './models/user';

@Component()
export default class Menu extends Vue {    

    @Prop({type: Object as PropType<User>})
    public user!: User // indicating to the compiler not to warn about missing initial value

    mounted(){
      console.log(this.user);
    }

}

Answer №3

Absolutely, you can leverage all the features of the basic javascript vue library when incorporating typescript. To enhance your development experience, I recommend utilizing the official class decorator.

To define a prop, simply include it as a parameter within your class decorator like this:

@Component({
  props: {
    classElement: String
  }
})
export default class Menu extends Vue
{
    mounted()
    {
      console.log(this.classElement);
    }
}

Since components accept an object, you also have the option to define an interface for this object and pass it in accordingly.

Alternatively, you may opt for the vue-property-decorator for a syntax reminiscent of Angular.

Answer №4

If you want to add properties to a class, you can do it in the following way:

import {Component, Vue} from 'vue-property-decorator'


const customProps = Vue.extend({
   classProp: {
      type: String
   }
})

@Component
export default class Navigation extends customProps
{
    mounted() {
      console.log(this.classProp);
    }
}

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