JSPM

An abstract layer that would make using intersection observer easier

Fast intersection of multiple arrays

Wraps the Observer API

Lazily render Vue.js components for performance.

A visibility based trigger for loading more data.

Reference Implementation of the Dufour-Peyton Intersection Algorithm. Calculates the Intersections of Arbitrary Polygons with a Geospatial Raster.

Angular directive to load elements lazily

Exact arithmetic test for line segment intersection

Return an array with the unique values present in _all_ given arrays using strict equality for comparisons.

A Svelte action that monitors an element enters or leaves the viewport or a parent element. Performant and efficient thanks to using Intersection Observer under the hood.

Any dimensional box intersection

Uniquely flexible and light-weight utility for cloning and deep (recursive) merging of JavaScript objects. Supports descriptor values, accessor functions, and custom prototypes. Provides advanced options for customizing the clone/merge process.

Remove self intersections, t-junctions and duplicate edges/vertices from a planar straight line graph

A library of intersection algorithms covering all SVG shape types

An intersection observer hook for all your purposes

Javascript library for 2d geometry

Fast point-in-polygon intersection for large numbers of polygons.

A library of intersection algorithms covering all SVG shape types

Utilities to work with projections (e.g. mongo)

An ESnext spec-compliant `Set.prototype.intersection` shim/polyfill/replacement that works as far down as ES3

rxjs-web-observers

A Vue.js component to lazy load images using the Intersection Observer.

A infinite scroll component in ReactJS, using Intersection Observer API.

Utilities for performing mathematical set operations on intervals and arrays of intervals

Fast geometry in geometry lookup for large GeoJSONs

Computes the area of the intersection of two rectangles.

2D intersection utilities for TLDraw and maybe you, too.

A helper to work with rectangular regions in the DOM

Converts TypeScript-like intersection types to JSDoc compatible union types, that is, from & -> |

React Component to lazy load images

2d segment to segment intersection detection

Minimal library to observe nodes entering and leaving the viewport

Manipulate intervals in a functional way

Low-Level GeoSpatial Masking Functions

React standard library

ES Map/Set-compatible implementations with customizable equality semantics & supporting operations

Uniquely flexible and light-weight utility for cloning and deep (recursive) merging of JavaScript objects. Supports descriptor values, accessor functions, and custom prototypes. Provides advanced options for customizing the clone/merge process.

Calculate the difference of two arrays

A tiny library to observer elements

Determine the point of intersection between a ray and axis-aligned bounding box (AABB)

An array is a collection of values, stored contiguously.

Boolean operations on polygons (union, intersection, difference, xor)

react intersection visible

A data structure for storing number intervals

Greiner-Hormann clipping algorithm

Dynamic BVH implementation based on Erin Catto's paper.

An iterable is a sequence of values.

Functional, polymorphic API for 2D geometry types & SVG generation

An easy to use intersection observer hooks based on IntersectionObserver API.

Javascript Set operations

Purely functional linear, quadratic and cubic bezier library, including accurate, robust bezier intersection.

Check if two polygons overlap

2D/3D shape intersection checks

intersections between bezier curves of order 2, 3 and lines and rectangles

Action & utilities for building table of contents

Measure and compare the dimensions and distances of DOM elements.

App that shows the intersection between 2 lines or line segments

Vevet is a JavaScript library for creative development that simplifies crafting rich interactions like split text animations, carousels, marquees, preloading, and more.

Find intersecting ranges using Marzullo algorithm

High performance set theory - functional utilities which operate on arbitrary input sets.

Script for lazyloading assets using Intersection Observer API

Javascript library for 2d geometry

Create scrolly-telling animations in React with ease.

image-component

creates a picking ray for a 2D/3D camera

A tiny library to observe elements entering the viewport using Intersection Observer.

JavaScript utility to observe sticky elements using the Intersection Observer API

test for collision with a circle and point

Closed/open/semi-open interval data type, queries & operations

A function collection for working with rectangles

Intersection component package with testing and automatic documentation.

intersect a ray and triangle in 3 dimensions

A pack of functions for working with Sets.

return line segment representing the intersection between a pair of 3D triangles. based on Thomas Möller's algorithm.

Intersection Observer for React

a high-level ray picking helper for 3D intersection

whether a picking ray intersects with a plane

NPM wrapper of Kevin Lindsey's intersection.js

Lightweight cross-browser library that enables you to create a watcher for a given element, and get back a callback when it has entered the viewport

New Set methods polyfill

a high-level 3D perspective camera

Apply boolean Polygon clipping operations (intersection, union, difference, xor) to your Polygons & MultiPolygons.

Merge and normalize adjacent or overlapping integer ranges

Check if two Sets contain all the same values

Intersection plugin for svg.js

A function collection for working with circles

Lightweight image lazy-loader using the intersection observer API.

Monitor if a component is inside the viewport, using IntersectionObserver API

react intersection visible hook for react

A Svelte action that monitors an element enters or leaves the viewport or a parent element. Performant and efficient thanks to using Intersection Observer under the hood. Forked from maciekgrzybek to support Svelte 5 after no merge of fixes.

line-circle collision test

Monitor if a component is inside the viewport, using IntersectionObserver API

Datalog-inspired, optimized pattern/predicate query engine for JS objects & arrays of objects

A Vue.js component to lazy load images using the Intersection Observer.

Hook for intersection observer

Tailwind CSS with Intersection Observer variants

Various utilities

This package includes a set of useful array methods that facilitates working with arrays, specifically the arrays that contain objects or arrays even falsy values (such as: 0, null, false, NaN...). This package is es5 supported.

Superfast and small intersection supporting primitives and objects. Up to 3x faster than other libraries. In the age of big data, you need it.

LISN.js browser bundles.

Plain vanilla JS IntersectionObserver utility, to be used as a mixin

Monitor the scroll percentage of a component inside the viewport, using the IntersectionObserver API.

Simple Intersection Observer hook for React

Custom hook designed to detect if an element is visible within the viewport.

Gives values present in both arrays.

fast line intersection

A library to lazy load images using Intersection Observer

An extension of the javascript Set object which contains useful Set operation methods

An implementation of the Watertight Ray/Triangle Intersection algorithm

Geometry intersection and bounding volume helpers for PEX.

Fast and robust triangle-triangle intersection test with high precision for cross and coplanar triangles based on the algorithm by Devillers & Guigue.

A utility that takes 1 or more sorted arrays and emits a node stream event whenever an intersection is found

A lightweight and simple React hook for detecting if an element is in the viewport using the Intersection Observer API. Perfect for lazy loading, infinite scrolling, animations, and more!

Small wrapper for IntersectionObserver, to use it more modular way.

React components to add reveal animations using the Intersection Observer API and CSS Animations.

Intersect sorted lists using merge intersection with galloping lookahead

Simply handle user gestures and actions. Includes widgets.

A javascript library for working with objects

A collection of observers for Svelte

A Bounding Volume Hierarchy data structure, for fast ray-mesh intersection

Determines whether any of the segments of 2 given linestrings intersect

Returns the symmetric difference (exclusive-or) of an array of elements (elements that are present in all given arrays and not in their intersections).

LISN.js for React.

A visibility based trigger for loading more data.

Performant & ergonomic 2D geometry in typescript

React Hook to call an action if an intersected element was reached

a plugin for vue exposure, used by intersection observer API

A group of functions for working with Maps.

Tailwind CSS with Intersection Observer & Load variants

A sorted array is a collection of values, arranged in an order.

Alpine JS magic helper that determines when elements overlap or intersect each other, perfect for menus, tooltips, modals, and collision detection 🥞

A group of functions for working with Maps {web}.

Frequently used tools for React

Monitor if a component is inside the viewport, using IntersectionObserver API

ILists is a pair of key iterable list and value iterable list, with unique keys.

An easy-to-use React hook that tells you whether a component/element is visible on the viewport currently, and if yes, how much of it is visible.

A collection of methods for working with Objects.

compute the intersection between two intervals

Monitor if a component is inside the viewport, using IntersectionObserver API

A collection of functions for operating upon Entries {web}.

A pack of functions for working with Sets {web}.

Node.js utility functions to handle objects

Gives values present in both arrays.

A helper to work with rectangular regions in the DOM

A dependency free utility to set and remove animation classes on elements as they become visible in the viewport, using the Intersection Observer API

Bounding interval hierarchy and bounding volume hierarchy library for nodejs

A collection of methods for working with Objects {web}.

ILists is a pair of key iterable list and value iterable list, with unique keys {web}.

Find the intersection of two glob patterns

An Alpine.js plugin to easily add CSS classes to an element when it enters the viewport.

Returns evenly spaced values within given interval.

Watches targets position in viewport using IntersectionObserver - similar to menuspy

Node utility librairies

An array is a collection of values, stored contiguously {web}.

Lazy load component with react && react-router.

A collection of helpers for detecting intersections in 2D and 3D

A fork from pelias/polygon-lookup with updated dependencies

A collection of functions for operating upon Lists.

An iterable is a sequence of values {web}.

Provides a way with extra configuration options to execute a handler when a given element is on view.

Creates an array of unique values that are included in all given arrays.

Javascript Object Extensions

A simple and fast API to manage viewport and DOM elements intersections as you scroll

IntersectionTrigger utilizes the most modern web technology to trigger anything by intersection. Including scroll-based animations.

React Hook for Tracking Section Visibility in the Viewport

A sorted array is a collection of values, arranged in an order {web}.

Styled components syntax for creating raw html in javascript.

A React component that supports infinite scroll using Intersection Observer API

Counts occurrences of values.

A collection of functions for operating upon Entries.

test if a ray intersects an aabb in 2d/3d space

Boolean operations on polygons

Find all intersections between two sets of line segments

Apply boolean polygon clipping operations (intersection, union, difference, xor) to your Polygons & MultiPolygons.

A library for slideup animation using directive with Angular

Allows Union, Difference, Xor, and Intersection operations on two polygons.

ReactJS component that applies CSS styles as it approaches the top of the viewport.

Simple Javascript IntersectionObserver implementation for Ember applications.

React library for observing and loading blocks of items in lists.

An easier way to observe the intersections with the viewport

A JavaScript port of the polyclip library

Greiner-Hormann clipping algorithm; Typescript port.

Frequently used tools for React

RegexSolver allows you to manipulate regular expressions as sets, enabling operations such as intersection, union, and subtraction.

A basic library for some utility functions

Javascript library for 2d geometry

A small wrapper around turf-intersect to safely clip one geojson polygon to another

Apply boolean Polygon clipping operations (intersection, union, difference, xor) to your Polygons & MultiPolygons.

A libraray for Isochrone, Routing & geoprocessing GeoJson Data

Create an iterator which returns the intersection of two or more iterators.

Test if two triangles in the plane intersect

Helpers for Set objects.

React lazy loading component using vanilla-lazyload library. Speedy, lightweight and easy to use.

A utility library providing common array manipulations and React hooks.


Render on intersection

detect if a 2D triangle and circle collide

Apply boolean polygon clipping operations (union, intersection, difference, xor) to Polygons & MultiPolygons in your GeoJSON files.

Gives values present in both arrays.

An esay-to-use wrapper class over intersection observer API.

Counts occurrences of values.

A collection of functions for operating upon Lists {web}.

Detect self-intersecting polygons in Javascript. An implementation of the Bentley–Ottmann sweep line algorithm for detecting crossings in a set of line segments.

Dasboard for React

A wrapper for @loadable/component that uses IntersectionObserver to trigger component load.

A Bounding Volume Hierarchy data structure, for fast ray-mesh intersection

Returns evenly spaced values within given interval.

Return intersect object that have same key from a number of objects

A minimalistic es6 implementation of set

Zero-dependency TypeScript runtime type validation with full type inference

This is a simple React Hooks that trigger a callback all time the element is viewed.

Framework agnostic library to detect viewable impressions

BVH

Calculate intersection of two lines

Lazy Loading images and other (JS, etc.) using Intersection Observer with polyfill

Scalable distinct value counting system

A lightweight TypeScript library providing utilities for observing intersection and resize events of DOM elements with automatic cleanup.

🔢 JavaScript range validation library - Extend Number and BigInt prototypes with powerful range checking, validation, and manipulation utilities. Perfect for form validation, game development, and scientific computing.

Javascript library for 2d geometry. Cloned from flattenjs

A library for working with Sets and arrays as sets.

Rearranges values in arbitrary order.

TailwindCSS Zen intersection animation plugin

Flattens nested array to given depth.

Flattens nested array to given depth.

Handle your array objects with ease

Detects if the inner children are visible

Gives values present in both arrays.

Two dimensional geometry manipulation

Remove self intersections, t-junctions and duplicate edges/vertices from a planar straight line graph

test for the intersection of convex polytopes in 2d or 3d, computing the minimum translation vector

Fast testing whether two line segments intersect

A BVH implementation to speed up raycasting against three.js meshes.

Javascript library for 2d geometry

Implementation of range data structures using plain JavaScript arrays.

Find the symmetric difference of two string arrays.

Scroll position-related navigation state management

An API (wrapper actually) for connect trough Intersection Controller game data like users and maps

Rearranges values in arbitrary order.

React standard library

wip

Given a graph with a graph with a non planar embedding, make changes to this graph so that it becomes planar.

Find unique common elements among given arrays

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

[Deprecated] JST to perform set intersection and set subtraction operations on 2 user provided arrays

Automatically lazy load images inserted into the DOM

Returns the vertices of multiple circle intersection

Bezier curve intersection algorithm and utilities

calculate the intersection of a ray and a disk or plane in three dimensions

Broad coverage of sorted array operations

React utilities for lazy image loading