How to get total driving distance with Google Maps API V3?

Question

I used to be able to get it like this:

directionsService.route(directionsRequest, function(directionsResult, directionsStatus) {     var directionsRenderer = new google.maps.DirectionsRenderer({         directions: directionsResult,         map: map     });     $('#distance').text(directionsResult.trips[0].routes[0].distance.text)     $('#duration').text(directionsResult.trips[0].routes[0].duration.text) }) 

But it looks like they changed their API on me! Looks like trips is no longer there, and routes only gives you a bunch of legs... do I really have to iterate over all the legs and sum up the distance now?

Answer 1

As per Leniel's answer:

var totalDistance = 0; var totalDuration = 0; var legs = directionsResult.routes[0].legs; for(var i=0; i<legs.length; ++i) {     totalDistance += legs[i].distance.value;     totalDuration += legs[i].duration.value; } $('#distance').text(totalDistance); $('#duration').text(totalDuration); 

Actually, this works just fine too, if you don't have any waypoints:

$('#distance').text(directionsResult.routes[0].legs[0].distance.text); $('#duration').text(directionsResult.routes[0].legs[0].duration.text); 

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Here's a fuller example using lodash. Shouldn't be too hard to replace flatBy and sum if you're not using it.

/**  * Computes the total driving distance between addresses. Result in meters.  *  * @param {string[]} addresses Array of address strings. Requires two or more.  * @returns {Promise} Driving distance in meters  */ export default function calculateDistance(addresses) {     return new Promise((resolve, reject) => {         if(addresses.length < 2) {             return reject(new Error(`Distance calculation requires at least 2 stops, got ${addresses.length}`));         }          const {TravelMode, DirectionsService, DirectionsStatus} = google.maps;          const directionsService = new DirectionsService;         const origin = addresses.shift();         const destination = addresses.pop();         const waypoints = addresses.map(stop => ({location: stop}));          directionsService.route({             origin,             waypoints,             destination,             travelMode: TravelMode.DRIVING,         }, (response, status) => {             if(status === DirectionsStatus.OK) {                 let distances = _.flatMap(response.routes, route => _.flatMap(route.legs, leg => leg.distance.value));                  return resolve(_.sum(distances));             } else {                 return reject(new Error(status));             }         });     }); } 

Remember to include the Google Maps API:

<script src="https://maps.googleapis.com/maps/api/js?key=API_KEY&libraries=places"></script> 

Also, I'm pretty sure their ToS require you to display a Google Map too.