Vue 3 Component Registration

In versions of Vue prior to 3, you had to use the global Vue.extend() or Vue.component() methods to register components. However, in Vue 3, you can register a component by using the "components" property within its options object.

Below is an example demonstrating how to register a component using the "components" option in Vue 3:

// Import child component
import ChildComponent from './ChildComponent.vue';

export default {
  name: 'ParentComponent',
  components: {
    ChildComponent, // Register as CamelCase here
  },
  // Other options for the parent component
}

In the code above, we first import the child component ChildComponent using an ES6 module statement. Then, within the "components" option, we register it under its name. This allows us to use the <child-component></child-component> tag in the parent template to render the registered child component.

It is important to note that while registering a component requires camelCase naming convention (e.g., ChildComponent), when using it within templates, kebab-case notation must be used (e.g., child-component). In the example above, we utilize camelCase during registration but switch to kebab-case in the template.

Components registered via the "components" option can be used directly inside a parent component's template just like any other HTML element. This facilitates easier reusability and enhances code maintainability and readability.

Notably, Vue 3 also introduces an alternative method for registering components using the defineComponent function. This approach is particularly well-suited for TypeScript-based development environments as it offers superior type inference and editor support. Regardless of whether you use the "components" option or the defineComponent function, both methods are valid for component registration.