Is it true that Vue 3 + Inertia automatically removes event listeners upon component unmounting?

Question

Is it true that Vue 3 + Inertia automatically removes event listeners upon component unmounting?

There is an event listener set up within the script setup block:

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

const elementRef = ref(null)
    
window.addEventListener('click', (event) => {
    if (!elementRef.value.contains(event.target)){
        console.log('Click detected outside of element')
    }
})

</script>


<template>
  <div ref="elementRef">Your element</div>
</template>

Will this event listener automatically be removed upon component unmount, or must it be manually removed?

javascript vue.js vuejs3 inertiajs

Answer 1

Answer №1

Remember, the global event listener doesn't automatically go away on its own, so it's up to your component to take care of that.

To manage this properly, make sure you add the listener in the mounted hook and remove it in the unmounted hook. Don't forget to save the function used with addEventListener so you can also pass it to removeEventListener:

<script setup>
import { ref, onMounted, onUnmounted } from 'vue'

const elementRef = ref(null)

const onClick = (event) => {
    if (!elementRef.value.contains(event.target)) {
        console.log('clicked outside the element')
    }
}

onMounted(() => window.addEventListener('click', onClick))
onUnmounted(() => window.removeEventListener('click', onClick))
</script>

Answer 2

Remember, the global event listener doesn't automatically go away on its own, so it's up to your component to take care of that.

To manage this properly, make sure you add the listener in the mounted hook and remove it in the unmounted hook. Don't forget to save the function used with addEventListener so you can also pass it to removeEventListener:

<script setup>
import { ref, onMounted, onUnmounted } from 'vue'

const elementRef = ref(null)

const onClick = (event) => {
    if (!elementRef.value.contains(event.target)) {
        console.log('clicked outside the element')
    }
}

onMounted(() => window.addEventListener('click', onClick))
onUnmounted(() => window.removeEventListener('click', onClick))
</script>

Answer 3

Answer №2

Discovering a method to automatically remove event listeners:

import { getCurrentScope, onScopeDispose } from "vue";

export function addEventListenerWrapper(target, name, fn) {
    target.addEventListener(name, fn);
    if (getCurrentScope()) {
        onScopeDispose(() => target.removeEventListener(name, fn));
    }
}

You can simply register your listener within your component like this and it will be removed automatically later:

addEventListenerWrapper(window, "click", event => {
    if (!elementRef.value.contains(event.target)) {
        console.log("click outside element");
    }
})

Check out the Vue SFC Playground link for a live demonstration. You will notice registration/deregistration messages in the console when toggling the element with the button.

For more information, visit these links:

Answer 4

Discovering a method to automatically remove event listeners:

import { getCurrentScope, onScopeDispose } from "vue";

export function addEventListenerWrapper(target, name, fn) {
    target.addEventListener(name, fn);
    if (getCurrentScope()) {
        onScopeDispose(() => target.removeEventListener(name, fn));
    }
}

You can simply register your listener within your component like this and it will be removed automatically later:

addEventListenerWrapper(window, "click", event => {
    if (!elementRef.value.contains(event.target)) {
        console.log("click outside element");
    }
})

Check out the Vue SFC Playground link for a live demonstration. You will notice registration/deregistration messages in the console when toggling the element with the button.

For more information, visit these links:

Is it true that Vue 3 + Inertia automatically removes event listeners upon component unmounting?

Answer №1

Answer №2

Similar questions

A React child error has occurred in Next.js due to invalid objects being used

Showing Predefined Date on an HTML Form in an iOS Application

Issue encountered when attempting to add multiple JavaScript functions through Greasemonkey using unsafeWindow

What are the steps for defining a package once and utilizing it across multiple pages?

Switch up the color of checkboxes with a dropdown menu option

Transfer the text from one cell and insert it into the "neighbor" cell of a different column when the content is editable

Send a file using ajax with the help of JavaScript and PHP

The addition and deletion of classes can sometimes lead to disruptions in the DOM

Animation for maximum height with transition from a set value to no maximum height

Top strategies for avoiding element tampering

Showcasing special characters in JavaScript

Restricting the number of characters allowed for text messages and keeping track of the count

Refreshing html in nodejs after a fetch promise remains in a pending state

Tips for automatically verifying coupons and adjusting prices

What is the process for generating an attribute in a system?

SQL Query using Date retrieves Datetime values in a Node application connected to MSSQL

Guy discussing the ins and outs of JavaScript variables

How can we display a banner after every third element using VUE.js?

Adjust the itinerary's color using leaflet-routing-machine

Issue: The plugin 0 mentioned in the file "/my dir/node_modules/babel-preset-php/src/index.js" contains an invalid property called "default"