Pause the event listener temporarily and reattach it after specific actions have been completed

Question

Pause the event listener temporarily and reattach it after specific actions have been completed

I am currently working on a React app that includes a scrollable div. Here is an example:

<main id="main" onScroll={this.handleScroll}>

My question is, how can I temporarily remove the onScroll event listener from the main element and then reattach it after performing certain actions?

I have two methods of accessing the element:

document.getElementById('main')

and

$('#main')

However, when I inspect the returned element, I cannot seem to find the onScroll property where this.handleScroll is attached. Is there a way to temporarily detach and reattach it?

The reason I need to do this is because I am trying to create a scrollSpy effect. As I navigate through sections in my navbar, I want to scroll the 'main' div accordingly. But since I also use the onScroll event listener on 'main' to detect which section is currently visible, there is a conflict. Therefore, I need to temporarily disable the event listener while interacting with the navbar.

javascript jquery css reactjs

Answer 1

Answer №1

There are multiple ways to achieve this, using jQuery or without it.

You have the option to create a reusable function for removing listeners:

// Adding a listener.
$('#main').addEventListener('scroll', this.handleScroll); // Using jQuery
document.getElementById('main').addEventListener("scroll", this.handleScroll); // Without jQuery

// Removing a listener.
$('#main').removeEventListener('scroll', this.handleScroll); // Removing listener with jQuery
document.getElementById('main').removeEventListener("scroll", this.handleScroll); // Removing listener without jQuery.

This gives you the flexibility to add or remove the listener wherever needed.

Answer 2

There are multiple ways to achieve this, using jQuery or without it.

You have the option to create a reusable function for removing listeners:

// Adding a listener.
$('#main').addEventListener('scroll', this.handleScroll); // Using jQuery
document.getElementById('main').addEventListener("scroll", this.handleScroll); // Without jQuery

// Removing a listener.
$('#main').removeEventListener('scroll', this.handleScroll); // Removing listener with jQuery
document.getElementById('main').removeEventListener("scroll", this.handleScroll); // Removing listener without jQuery.

This gives you the flexibility to add or remove the listener wherever needed.

Pause the event listener temporarily and reattach it after specific actions have been completed

Answer №1

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