Parent-Child Communication in VueJS 2.0: How to effectively pass data from the parent component

Question

Parent-Child Communication in VueJS 2.0: How to effectively pass data from the parent component

Does anyone know a straightforward solution to this issue? I've been struggling to find one.

Within my HTML file, there's a button that looks like this:

<button @click="showModal">Show Modal</button>

By clicking on the button, it triggers the following method:

new Vue({
    el: '#root',
    methods: {
        showModal() { Event.$emit('showModal'); },
    }
});

My goal is to toggle a class in a modal component when the button is clicked. Below is part of the component's code relevant to this functionality:

Vue.component('modal', {

    template: `
        <div :class="[ modalClass, {'is-active' : isActive }]">
            ETC...
        </div>
        `

    data() {
        return {
            isActive: false,
            modalClass: 'modal'
        }
    }

Being new to VueJS, I'm finding it challenging to communicate effectively within Vue. What steps should I take to ensure that isActive becomes true upon clicking the button?

Your input and advice would be greatly appreciated!

Sincerely,

Moshe

javascript vue.js vuejs2 vue-component

Answer 1

Answer №1

If you're working in your main.js file (or wherever you initialize your Vue app)

You have the option to utilize a basic vue instance as an eventbus

Vue.prototype.bus = new Vue();

This allows you to use it like this:

this.bus.$on('event', (params) => {})

this.bus.$emit('event', params)

Take a look at one of my vue projects on GitHub for reference, I use the eventbus extensively. https://github.com/wilomgfx/vue-weather

Also, don't miss out on this fantastic free series on VueJS 2, it's really helpful :

Here's a complete example using the original poster's question:

https://codepen.io/wilomgfx/pen/OpEVpz?editors=1010

Answer 2

If you're working in your main.js file (or wherever you initialize your Vue app)

You have the option to utilize a basic vue instance as an eventbus

Vue.prototype.bus = new Vue();

This allows you to use it like this:

this.bus.$on('event', (params) => {})

this.bus.$emit('event', params)

Take a look at one of my vue projects on GitHub for reference, I use the eventbus extensively. https://github.com/wilomgfx/vue-weather

Also, don't miss out on this fantastic free series on VueJS 2, it's really helpful :

Here's a complete example using the original poster's question:

https://codepen.io/wilomgfx/pen/OpEVpz?editors=1010

Answer 3

Answer №2

When it comes to communicating from a parent component to a child component in Vue.js, you can utilize component props.

If the communication needs to go even deeper, where the parent communicates with a nested child component, you can make use of the busEvent method as suggested by @WilomGfx.

Here is an example code snippet for communication from parent to child:

Vue.component('modal', {
        template: '<div :class="[ modalClass, {\'is-active\' : isActive }]">' +
            'Hello Word !' +
        '</div>',
        data() {
            return {
                modalClass: 'modal'
            }
        },
        props: {
            isActive: { type: Boolean, default: false }
        }
    });

    new Vue({
        el: '#root',
        data() {
          return {
            isActive: false,
          }
      },
      methods: {
        showModal() {this.isActive = true },
      }
    });

.is-active {
      color: red;
    }

<script src="https://vuejs.org/js/vue.min.js"></script>

<div id="root">
  <modal :is-active="isActive"></modal>
  <button @click="showModal">Show Modal (going red when prop isActive is true)</button>
</div>

Answer 4

When it comes to communicating from a parent component to a child component in Vue.js, you can utilize component props.

If the communication needs to go even deeper, where the parent communicates with a nested child component, you can make use of the busEvent method as suggested by @WilomGfx.

Here is an example code snippet for communication from parent to child:

Vue.component('modal', {
        template: '<div :class="[ modalClass, {\'is-active\' : isActive }]">' +
            'Hello Word !' +
        '</div>',
        data() {
            return {
                modalClass: 'modal'
            }
        },
        props: {
            isActive: { type: Boolean, default: false }
        }
    });

    new Vue({
        el: '#root',
        data() {
          return {
            isActive: false,
          }
      },
      methods: {
        showModal() {this.isActive = true },
      }
    });

.is-active {
      color: red;
    }

<script src="https://vuejs.org/js/vue.min.js"></script>

<div id="root">
  <modal :is-active="isActive"></modal>
  <button @click="showModal">Show Modal (going red when prop isActive is true)</button>
</div>

Parent-Child Communication in VueJS 2.0: How to effectively pass data from the parent component

Answer №1

Answer №2

Similar questions

Java servlet is unable to interpret the name of an html select tag

What is the maximum duration we can set for the Ajax timeout?

Bringing in PeerJs to the NextJs framework

Issue: Module 'C:viteinvite.js' not found while setting up vue.js in Laravel project

There is an issue with the hook call while trying to establish a context with a reducer

The Firebase Authentication JS library does not properly fill the `providerData` array

What is the best way to ensure that a child div can expand to fit within the scrollable area of its parent div

Is it possible to verify if each value satisfies a condition within a Javascript function?

Building a framework for combined frontend and backend plugins using Vue and Express

Create a randomized item for experimentation in NodeJs using an interface

Should I fork and customize npm package: Source or Distribution? How to handle the distribution files?

Instructions on how to determine if a client is a "desktop terminal"

Using Vue 3 to dynamically render a component from a string

Enable the event listener for the newly created element

React State not refreshing

Guide on resolving the error "Type 'Emits' does not have any call signatures" in Vue 3 with the combination of script setup and TypeScript

Is it possible to create a component with a button that triggers the rendering of a different component?

What are the steps to ensure availability validation with jQuery validation?

Exploring the location where an XMLHttpRequest/Ajax link is executed

Authentication using tokens - JSON Web Tokens

Parent-Child Communication in VueJS 2.0: How to effectively pass data from the parent component

Answer №1

Answer №2

Similar questions

Java servlet is unable to interpret the name of an html select tag

What is the maximum duration we can set for the Ajax timeout?

Bringing in PeerJs to the NextJs framework

Issue: Module 'C:viteinvite.js' not found while setting up vue.js in Laravel project

There is an issue with the hook call while trying to establish a context with a reducer

The Firebase Authentication JS library does not properly fill the `providerData` array

What is the best way to ensure that a child div can expand to fit within the scrollable area of its parent div

Is it possible to verify if each value satisfies a condition within a Javascript function?

Building a framework for combined frontend and backend plugins using Vue and Express

Create a randomized item for experimentation in NodeJs using an interface

Should I fork and customize npm package: Source or Distribution? How to handle the distribution files?

Instructions on how to determine if a client is a "desktop terminal"

Using Vue 3 to dynamically render a component from a string

Enable the event listener for the newly created element

React State not refreshing

Guide on resolving the error "Type 'Emits' does not have any call signatures" in Vue 3 with the combination of script setup and TypeScript

Is it possible to create a component with a button that triggers the rendering of a different component?

What are the steps to ensure availability validation with jQuery validation?

Exploring the location where an XMLHttpRequest/Ajax link is executed

Authentication using tokens - JSON Web Tokens

Issue: Module 'C:viteinvite.js' not found while setting up vue.js in Laravel project