JSPM

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

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

The lodash method `_.intersection` exported as a module.

Martinez polygon clipping algorithm, does boolean operation on polygons (multipolygons, polygons with holes etc): intersection, union, difference, xor

A React hook for the IntersectionObserver API that uses a polyfill when the native API is not available

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

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

🏯 PositionObserver is a JavaScript tool that provides a way to asynchronously observe changes in the position of a target element within its viewport.

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

Fast intersection of multiple arrays

react native intersection observer

React hook to monitor an element enters or leaves the viewport (or another element).

React utilities for lazy image loading

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

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

Exact arithmetic test for line segment intersection

Intersection Observer Admin for better performance

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

A library for declarative use of Intersection Observer API with Angular

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

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

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.

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 & -> |

A simple library that lets you know whether a Component is visible or not.

2d segment to segment intersection detection

Manipulate intervals in a functional way

Low-Level GeoSpatial Masking Functions

Tailwind CSS with Intersection Observer variants

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

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

Svelte action that leverages the Intersection Observer API to trigger reveal on scroll transitions

Primitives to support using the intersection observer API.

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

Angular directive to load elements lazily

React Component to lazy load images

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

Javascript Set operations

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

Check if two polygons overlap

React standard library

2D/3D shape intersection checks

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

A visibility based trigger for loading more data.

Intersection observer for complex or embedded react native view

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.

Javascript library for 2d geometry

Lazily render Vue.js components for performance.

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

An easy to use React hook wrapper around the IntersectionObserver API.

test for collision with a circle and point

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

Svelte use:action for element position notifications using IntersectionObserver.

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.

Action & utilities for building table of contents

React Component that observe changes in the intersection of a target element with viewport using IntersectionObserver

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

A versatile and efficient React Native component designed for seamless integration of scroll-based features into mobile applications. This package offers a powerful ScrollView observer that allows developers to easily track and respond to scroll events an

a high-level ray picking helper for 3D intersection

whether a picking ray intersects with a plane

A lightweight Preact implementation of Intersection Observer API

NPM wrapper of Kevin Lindsey's intersection.js

a high-level 3D perspective camera

New Set methods polyfill

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

A function collection for working with circles

Intersection plugin for svg.js

line-circle collision test

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

Intersection observer for Angular

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.

Lightweight JavaScript library for viewport detection with debounced callbacks - intersection observer, lazy loading, scroll animations, infinite scroll, element visibility tracking with TypeScript support. Zero dependencies, ~1KB gzipped.

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

vue directive use Intersection Observer API

Async module that resolves when a target element has entered the viewport at a threshold, using Intersection Observer API

rxjs-web-observers

Minimal library to observe nodes entering and leaving the viewport

Gives values present in both arrays.

fast line intersection

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

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

Intersect sorted lists using merge intersection with galloping lookahead

A javascript library for working with objects

LISN.js browser bundles.

Create scrolly-telling animations in React with ease.

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).

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

ID-based IntersectionObserver for React

react intersection visible hook for react

react native intersection observer

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

Performant & ergonomic 2D geometry in typescript

A group of functions for working with Maps.

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

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

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

Frequently used tools for React

Simply handle user gestures and actions. Includes widgets.

Angular wrapper for the Intersection Observer API

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

LISN.js for React.

compute the intersection between two intervals

A collection of methods for working with Objects.

image-component

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

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

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

A visibility based trigger for loading more data.

Node.js utility functions to handle objects

Gives values present in both arrays.

A helper to work with rectangular regions in the DOM

Bounding interval hierarchy and bounding volume hierarchy library for nodejs

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

A set of helpers in TS/JS, compatible with tree-shaking, for array.

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.

Node utility librairies

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

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

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

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}.

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

Javascript Object Extensions

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

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

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.

Counts occurrences of values.

Lazy load component with react && react-router.

With Target Observer, you can easily trigger animations, lazy load content, or handle visibility-based logic in your application.

A collection of functions for operating upon Entries.

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

Boolean operations on polygons

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

Find all intersections between two sets of line segments

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

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

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

A JavaScript port of the polyclip library

Styled components syntax for creating raw html in javascript.

Greiner-Hormann clipping algorithm; Typescript port.

javascript intersection observer

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.

A utility library providing common array manipulations and React hooks.


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.

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.

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

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.

React Hook for Tracking Section Visibility in the Viewport

Dasboard for React

Intersection Observer implementation for Angular

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

Returns evenly spaced values within given interval.

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

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

An abstract layer that would make using intersection observer easier

Wraps the Observer API

A minimalistic es6 implementation of set

Zero-dependency TypeScript runtime type validation with full type inference

BVH

Calculate intersection of two lines

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

Framework agnostic library to detect viewable impressions

Scalable distinct value counting system

Render on intersection

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

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

🔢 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.

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

Javascript library for 2d geometry. Cloned from flattenjs

A library for working with Sets and arrays as sets.

Rearranges values in arbitrary order.

Flattens nested array to given depth.

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

Flattens nested array to given depth.

Handle your array objects with ease

A collection of observers for Svelte

Gives values present in both arrays.

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

Two dimensional geometry manipulation

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

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.

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.

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

An intersection observer hook for all your purposes

TailwindCSS Zen intersection animation plugin

Find the symmetric difference of two string arrays.

Scroll position-related navigation state management

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

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

Rearranges values in arbitrary order.

Simple Javascript IntersectionObserver implementation for Ember applications.