Components in Vue 3: A Comprehensive Guide

In Vue 3, components are a key feature for building reusable and modular user interfaces. Components allow you to define and reuse pieces of UI, such as forms, lists, and buttons, in different parts of your application. In this tutorial, we'll take a look at how to use components in Vue 3 to build efficient and scalable UIs.

To create a component in Vue 3, you can use the Vue.component function to define a new component. The Vue.component function takes two arguments: the name of the component, and an options object that defines the component's behavior.

For example, let's say you want to create a component called Button that renders a button element:

<template>
  <button>{{ label }}</button>
</template>

<script>
export default {
  props: {
    label: {
      type: String,
      default: 'Button',
    },
  },
};
</script>

In this example, the Button component is defined in the export default object, and the props option is used to define a label prop that allows you to customize the label of the button. The template contains a button element that displays the label prop.

To use the Button component in your application, you can use the <Button> element in a template. When the component is rendered, the label prop will be displayed in the button element.

<template>
  <Button></Button>
  <Button label="Click me"></Button>
</template>

<script>
import Button from './Button.vue';

export default {
  components: {
    Button,
  },
};
</script>

In this example, the Button component is imported and registered in the components option, and the Button element is used in the template to render the Button component. The first Button element uses the default label, and the second Button element uses a custom label.

By using components, you can build efficient and scalable UIs that can be reused and customized in different parts of your application. Whether you're building a simple form or a complex single-page application, components are a key feature for building modular and reusable UIs with Vue 3.