// from https://stackoverflow.com/questions/1382107/whats-a-good-way-to-extend-error-in-javascript // (above link provided by https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error) export default function d3VoronoiMapError(message) { this.message = message; this.stack = new Error().stack; } d3VoronoiMapError.prototype.name = 'd3VoronoiMapError'; d3VoronoiMapError.prototype = new Error();