Takes a ring and return true or false whether or not the ring is clockwise or counter-clockwise.

• line (Feature<LineString> | LineString | Array<Array<number>>) to be evaluated

var clockwiseRing = turf.lineString([[0,0],[1,1],[1,0],[0,0]]);
var counterClockwiseRing = turf.lineString([[0,0],[1,0],[1,1],[0,0]]);

turf.booleanClockwise(clockwiseRing)
//=true
turf.booleanClockwise(counterClockwiseRing)
//=false

Returns boolean true/false

This module is part of the Turfjs project, an open source module collection dedicated to geographic algorithms. It is maintained in the Turfjs/turf repository, where you can create PRs and issues.

Install this single module individually:

$ npm install @turf/boolean-clockwise

Or install the all-encompassing @turf/turf module that includes all modules as functions:

$ npm install @turf/turf