Observer Packages

Monster is a simple library for creating fast, robust and lightweight websites.

SolidJS component that automatically measures and provides the width and height of its parent — useful for virtualized lists, grids, and charts.

Observes position change of an element within viewport as a result of resize, scroll, left or top coordinates change, or zooming in and out

Observes visibility state of a DOM element, allows to check if an element is visible in viewport.

Permanently apply javascript modifiers to your dynamic DOM

Element resize event for Preact X

A class to watch and dispatch custom events.

Register a components init function & observe selector. The init function will be fired immedietly after detection of selector.

A library for watching the changes of objects, and the changes of return values of expressions or functions

A simple to use "spy" action to listen when attributes are updated on target elements.

JavaScript utility to observe sticky elements using the Intersection Observer API

Helper making the observation of element's visibility a little more convenient. Based on the IntersectionObserver API.

A typed, simple to use event emitter that solves the typing problems of the native EventTarget API.

Track angular http requests and get notified about completion and timeouts.

Track angular router events and get notified about completion and timeouts.

A polyfill for the Resize Observer API

Tiny observable library for other extensibility

Tracks the user's activity status. Calls your listeners when considered the user is idle or wakes up.