Sorry if I confused you by talking about the directions changed event.
I was trying to say the event is useless because the routeindex is not set
until setDirections(response) has completed.
You just need to call setShortestRoute After setDirections
directionsService.route(request, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
idx = directionsDisplay.getRouteIndex();
console.log('idx 2: ', idx);
setShortestRoute(directionsDisplay.getDirections());
idx = directionsDisplay.getRouteIndex();
console.log('idx 3: ', idx);
}
set idx: 1
test_map.html:103 <http://localhost:51356/Gmap/test_map.html>idx 2: 0
test_map.html:88 <http://localhost:51356/Gmap/test_map.html>set idx: 1
test_map.html:106 <http://localhost:51356/Gmap/test_map.html>idx 3: 1
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