A mapbox-gl toolkit: AOI drawing (rectangle/polygon with self-intersection detection), a map compare slider, and geospatial file parsing (GeoJSON/KML/Shapefile).

Find self-intersections in geojson polygon (possibly with interior rings)

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

A module to check if a polygon self-intersects using a sweepline algorithm

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

maptalks DrawTool extension with self-intersection detection for polygon drawing

Computes the intersection between two SVG paths

Tracks the intersection of a DOM element and its containing element or the viewport.

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

Underlying schema language parsed from arktype syntax.

Takes a complex (i.e. self-intersecting) geojson polygon, and breaks it down into its composite simple, non-self-intersecting one-ring polygons.

React hook to use IntersectionObserver declaratively.

Checks if two geometries have no overlapping areas.

A library for declarative use of Intersection Observer API with Angular

Tracks the intersection of a DOM element and its containing element or the viewport.

Intersection Observer Admin for better performance

Add a __self prop to all JSX Elements

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

React component for the Intersection Observer API

Track React component in viewport using Intersection Observer API