How can Vue 3's v-bind=$attrs be implemented effectively?

Question

How can Vue 3's v-bind=$attrs be implemented effectively?

I am currently in the process of migrating my Vue 2 application to Vue 3. According to the official documentation, the $listeners object has been removed in Vue 3 and event listeners are now part of $attrs. This includes taking non-prop attributes like class and style into account. In my Vue 2 application, I have a custom icon-button component that looks like the code snippet below:

Icon-component:

<template>
    <vu-button v-bind="buttonProps"
               :class="buttonClass"
                v-on="$listeners"         
               @click="buttonToggle">
        <vu-icon v-bind="iconProps"><slot/></vu-icon>
    </vu-button>
</template>

This component is utilized in various other components.

Parent component 1:

<vu-icon-button id="sw1" medium style="left:200px;">home</vu-icon-button>

Parent component 2:

<vu-icon-button class="menu-detail-btn" icon="collapse_menu" icon-type="su" @click="openModal()" size="small"></vu-icon-button>

In terms of migration strategy, I have already removed the $listeners but I'm uncertain about how to handle those non-prop attributes and the v-bind tag. How can I modify them so they can be used in parent components with attributes?

javascript vue.js vuejs2 vue-component vuejs3

Answer 1

Answer №1

Exploring Fallthrough Attribute Access in Vue 3

To access a component's fallthrough attributes within <script setup>, utilize the useAttrs() API:

<script setup>
import { useAttrs } from 'vue'

const attrs = useAttrs()
</script>

If you are not utilizing <script setup>, the attributes will be available as a property of the setup() context:

export default {
  setup(props, ctx) {
    // Access fallthrough attributes via ctx.attrs
    console.log(ctx.attrs)
  }
}

Turning Off Attribute Inheritance

If you prefer that a component does not automatically inherit attributes, you can disable this behavior by setting inheritAttrs: false in the component's options.

When using <script setup>, ensure to declare this option within a separate regular <script> block:


<script>
// Use a regular <script> block for declaring options
export default {
  inheritAttrs: false
}
</script>

<script setup>
// ...setup logic
</script>

You can now directly utilize the $attrs object in the template. This approach is beneficial when you need to bind an attribute to a non-root element instead of having them automatically inherited by the root element.

For instance:


<header>...</header>
<main v-bind="$attrs">...</main>
<footer>...</footer>

Answer 2

Exploring Fallthrough Attribute Access in Vue 3

To access a component's fallthrough attributes within <script setup>, utilize the useAttrs() API:

<script setup>
import { useAttrs } from 'vue'

const attrs = useAttrs()
</script>

If you are not utilizing <script setup>, the attributes will be available as a property of the setup() context:

export default {
  setup(props, ctx) {
    // Access fallthrough attributes via ctx.attrs
    console.log(ctx.attrs)
  }
}

Turning Off Attribute Inheritance

If you prefer that a component does not automatically inherit attributes, you can disable this behavior by setting inheritAttrs: false in the component's options.

When using <script setup>, ensure to declare this option within a separate regular <script> block:


<script>
// Use a regular <script> block for declaring options
export default {
  inheritAttrs: false
}
</script>

<script setup>
// ...setup logic
</script>

You can now directly utilize the $attrs object in the template. This approach is beneficial when you need to bind an attribute to a non-root element instead of having them automatically inherited by the root element.

For instance:


<header>...</header>
<main v-bind="$attrs">...</main>
<footer>...</footer>

How can Vue 3's v-bind=$attrs be implemented effectively?

Answer №1

Exploring Fallthrough Attribute Access in Vue 3

Turning Off Attribute Inheritance

Similar questions

Implementing jQuery and JavaScript validation for email addresses and usernames

The G/L account specified in the SAP B1 Service Layer is invalid and cannot be used

Is there a way for me to know when ng-options has completed updating the DOM?

Please be patient until setInterval() completes its task

Why don't inline style changes implemented by JavaScript function properly on mobile browsers like Chrome, Dolphin, and Android?

Angular - ui-router states are not being detected

Transfer information from the ajax success event to an external else/if statement

Refreshing an order in Laravel and Vue using axios

Tips for customizing the appearance of a Material-ui Autocomplete element

Trouble with $http response not appearing in AngularJS application

This function appears to have an excessive number of statements, totaling 41 in total

My objective is to show the div element just once using AngularJS

Traversing a JavaScript array with multiple dimensions containing markers created with Google Maps APIs

Ensuring reactivity of properties when passing props object to Vue component

What is the reason Vue does not execute or update a computed property that contains a reference to 'this' within a filter function?

What is the best way to include and control persistent URL parameters when making Ajax requests?

Removing a specific row in a database table and sending a boolean indicator to an API, all while keeping the original object intact

The significance of webpack and the "@" symbol in the URL() function

Produces consistent results despite variations in tag names within the DOM

Error encountered while attempting to validate and add new entries