npm install geo-distance-helper

yarn add geo-distance-helper

// using yarn
yarn test

// using npm
npm test

import geoDistance from 'geo-distance-helper';
// const geoDistance = require('geo-distance-helper');

const point1 = { lat: 36, lng: 42 };
const point2 = { lat: 64, lng: 21 };

// distance in kilometers
const distance = geoDistance(point1, point2);
// or
const distance = geoDistance(point1, point2, 'K');

// distance in nautical miles
const distance = geoDistance(point1, point2, 'N');