Understanding Local Component Registration in Vue.js

In Vue.js, components are reusable instances with a name. When developing large scale applications in Vue, you might want to split your components into smaller, manageable pieces. Such components can then be registered for use either globally across your entire Vue app or only in specific relevant components. We'll focus on how to register these local components considering the correct answer to the quiz question above.

The correct syntax to register a local component in Vue.js is components: {'my-component': {}}. This command defines a my-component local to the Vue instance or a single file component.

Here is an example of how you can register a local component:

var vm = new Vue({
  el: '#app',
  components: {
    'my-component': {
      template: '<h2>I am a local component!</h2>'
    }
  }
})

In this example, my-component is available for use inside the '#app' Vue instance. You can use it in the HTML file like this:

<div id="app">
  <my-component></my-component>
</div>

This will render 'I am a local component!' heading inside the '#app' element.

The key takeaway here is that local components are only accessible in the components where they have been registered, unlike global components which are accessible anywhere in your Vue application. Therefore, when looking to encapsulate and scope your Vue components more strictly, local registration can be a more suitable option.

It's important to remember that naming your components rightly is a crucial best practice. Try to give your components meaningful names that reflect their function in the app. This enhances readability, which can be quite helpful when managing larger Vue apps. As a rule of thumb, always use kebab-case (lowercase with hyphens) for multi-word component names as demonstrated in the example above.

Also, it is good to keep in mind that local registration helps to reduce the global scope pollution, optimize your bundle size, and improve the speed and performance of your app. It also promotes modular development of your Vue application.