To trigger a method in a VueJS parent component, one can utilize event listening

Question

To trigger a method in a VueJS parent component, one can utilize event listening

In my VueJS 2 project, there are a parent component and a child component. The parent component sends a property named items to the child component.

Whenever the user clicks on a button within the child component, it emits a refresh event using this syntax:

$emit('refresh', category.id)

My goal is to catch this event in the parent component and, upon receiving it, call a function such as alert().

What I've gathered so far from the VueJS documentation is that you can use the v-on directive to listen for events on elements like buttons. However, my parent component does not have any button element I can attach this listener to.

To clarify my approach, here's what I'm envisioning:

The parent component loads and executes a getData() function, passing its result as a prop to the child component.
The user interacts with a button inside the child component.
This action triggers an event within the child component.
Subsequently, the parent component once again invokes the getData() function and updates the prop being sent to the child component.

javascript vue.js vuejs2 bootstrap-vue

Answer 1

Answer №1

Suppose that in your child component, you have a code like this:

<button v-on:click="$emit('refresh', category.id)" ...

In the parent component, you should include:

<child v-on:refresh="refreshParent"   />
event emitted from child  ---------^       ^-------- its handler method in the parent

In the parent component's methods:

methods:{
    refreshParent(idCateg){
        this.getData()
     }
....
}

Answer 2

Suppose that in your child component, you have a code like this:

<button v-on:click="$emit('refresh', category.id)" ...

In the parent component, you should include:

<child v-on:refresh="refreshParent"   />
event emitted from child  ---------^       ^-------- its handler method in the parent

In the parent component's methods:

methods:{
    refreshParent(idCateg){
        this.getData()
     }
....
}

Answer 3

Answer №2

There's no need for a dedicated button in this case. Let me demonstrate the code to you

MainComponent.vue:

<child @update="updateFunction" />


methods: {
  updateFunction (id) {
    // implementation goes here
  }
}

ChildComponent.vue:

  this.$emit('update', id)

Answer 4

There's no need for a dedicated button in this case. Let me demonstrate the code to you

MainComponent.vue:

<child @update="updateFunction" />


methods: {
  updateFunction (id) {
    // implementation goes here
  }
}

ChildComponent.vue:

  this.$emit('update', id)

To trigger a method in a VueJS parent component, one can utilize event listening

Answer №1

Answer №2

Similar questions

Troubleshooting a problem with data retrieval in Hygraph and Next JS

Customize Your Calendar: A Guide to Disabling Dates with Pikaday.js

Over time, the FPS of the JavaScript canvas game is decreasing

What steps should I take to transform the chart data generation process during an AJAX callback?

In my Cordova application, I am able to print the locally stored JSON array, but I am encountering an issue where the

The API response indicating success is simply denoted as "Success: True", without any accompanying data

Issue with Laravel 5.8 Pusher integration - messages not coming through

Tips for implementing an onClick event within a NavBar component in a React application

Tips for integrating new channels and categories using a Discord bot

Place a Three.js scene within a jQuery modal dialogue box

Changing the image's flex-grow property will take precedence over the flex settings of other child

What is causing my reusable component to malfunction when used in conjunction with the "setInterval" function?

Switch the displayed image(s) based on the radio button selection made by the user

Problem with Bootstrap-slider not loading correctly

"Error: Discord Js encounters an issue trying to access the titles property of an

Having difficulty accessing the attributes of an object within a property

Discover the Primevue DataTable feature that enables dynamic column and column grouping functionality, with the added bonus of gridlines disappearing as you scroll down

Exploring File Read and Write Functionality in Angular 4

What is a better alternative to using the Event Bus for inter-component communication: data and computed properties

What is the most efficient way to refresh a React component when a global variable is updated?