JSPM

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

Euclidean geometry classes and tools for JavaScript

This library may not be fast, but it is robust. Robust in the fact that it will find all of the self-intersections in a polygon - minus of course shared endpoints.

test whether a ray intersects with a sphere

Intersection plugin for svg.js

Yet another set of libraries

Fast 2d geometry math: Vector2, Rectangle, Circle, Matrix2x3 (2D transformation), Circle, BoundingBox, Line2, Segment2, Intersections, Distances, Transitions (animation/tween), Random numbers, Noise

Standalone library to get all intersections between 2 SVG paths

basic geometry helpers

It Calculates “Outersections” of ranges.