Leaflet Routing Machine won't read waypoints from variable TypeError: t is null

Question

I am trying to add waypoints from a variable to a leaflet map. The resulting variable split_route1 is formatted correctly and when I hard-code the waypoints from the console log results, the waypoints render fine. When I try to use the var splitroute1 I get an error: TypeError: t is null (leaflet.js (line 6, col 17396))

 function splitroute(route1){

 split_route1 = '';

 for (x = 0; x < route1.length  ; x++) { 

            split_route1 +='L.latLng(' +      route1[x].ordered_locs.displayLatLng.lat + ',' + route1[x].ordered_locs.displayLatLng.lng + '),'
    }
console.log(split_route1)
L.Routing.control({
   waypoints:   [  

          split_route1

    ],
    routeWhileDragging: true
}).addTo(map2);

     }

Answer 1

I'd look here:

+= 'L.latLng('`

What is split_route meant to be? A multi-point array? Can you just construct this as an array and pass this in as waypoints?

var split_route = [];

for (x = 0; x < route1.length  ; x++) { 
    var coords = []; 
    coords.push(route1[x].ordered_locs.displayLatLng.lat, route1[x].ordered_locs.displayLatLng.lng);
    split_route.push(coords);
}