Watch for DOM elements creation and removal

A JavaScript library to animate content on page scroll.

Performant react hooks for WebApi Observers, useResizeObserver, useInteractionObserver, useMutationObserver

Apply MutationObserver mutations to a DOM.

The package contains tools for parsing DOM data, observing DOM and tracking changes.

React Portal with dynamic mounting support

A chrome extension to control media playing in any YouTube™ tab

Gather information about the DOM, Loading Time, Errors, Mutations, and more (with Custom Callbacks) with Javascript.

Plug changes like HTMLInputElement.value into MutationObservers in 766 bytes. Framework agnostic!

Automate the process of tracking and accumulating points, ensuring you never miss out on rewards and benefits

A minimalistic library for animating elements as they mount / unmount.

Detect when an element is changed in DOM

Performant and self-managing mutation observer system designed to be used on top of any architecture for temporary modifications such as A/B testing.

A Chrome extension that modifies the Dutch real estate website Funda.nl. It removes "suggested" houses, advertisements and adds average price per m2.

InstaSave is a simple browser extension that adds a "Save" button to Instagram posts and stories, making it easy to quickly save images and videos directly from your browser.

Decl is a simple library designed to enable more declarative and unobtrusive JavaScript

Allows you to easily modify elements on websites using MutationObserver.

A script to add link to members-only-videos list to YouTube channel page

Sentinel is an intelligent task observer that continuously monitors web pages for meaningful content changes using AI-powered semantic matching. It automatically marks tasks as complete when the content you're looking for appears — even if phrased differently.

Observable Array in JavaScript.