Creating specific data types in Vue.js

Is it possible to create custom prop types with extended validation for Vue.js props?

In the following example, we have a prop called background that is currently of type Object. I would like to change this to a custom prop type called Image. The Image prop should require the fields src and alt, while other fields are optional.

Current implementation:

export default {
  props: {
    background: {
      type: Object,
      src: String,
      srcset: String,
      alt: String,
      title: String,
    },
  },
};

Desired implementation:

class customPropImage {
  // magic ...
}

export default {
  props: {
    background: Image,
  },
};

Answer №1

Yes, it is possible to achieve that. As per the Vue documentation, you can specify the type as the constructor of your custom type. Adding custom validation could be done like this:

function CustomImage () {
  // Special logic goes here
}

Vue.component('blog-post', {
  props: {
    myImage: {
      type: CustomImage,
      validator: function (value) {
        return true; // Validation based on myImage value
      }
    }
  }
})

You can find an illustration of this in action through this codesandbox example.

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