Props in Vue 3: A Comprehensive Guide

In Vue 3, props are a way to pass data from a parent component to a child component. Props allow you to customize and reuse components by allowing you to specify the data that a component should use. In this tutorial, we'll take a look at how to use props in Vue 3 to build dynamic and reusable user interfaces.

To define a prop in Vue 3, you can use the props option in the component's options object. The props option is an object that contains the prop definitions for the component. Each prop definition specifies the name of the prop and its type.

For example, let's say you have a component called Button that renders a button element, and you want to allow the user to customize the label of the button:

<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 and specify the value of the label prop using the label attribute:

<template>
  <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 label attribute is used to specify the value of the label prop, which will be displayed in the button element.

By using props, you can customize and reuse components in different parts of your application. Whether you're building a simple form or a complex single-page application, props are a key feature for building dynamic and reusable UIs with Vue 3.