I have not looked at the code before / am not involved, but I think you are searching for this: [The Rails Port](//wiki.openstreetmap.org/wiki/The_Rails_Port#Getting_the_OpenStreetMap_code) and especially the [source code of the main osm page](https://github.com/openstreetmap/openstreetmap-website/blob/master/app/views/site/index.html.erb). Well, the main JavaScript code is still loaded into some placeholders there - somewhere ([/app/assets/javascripts](https://github.com/openstreetmap/openstreetmap-website/blob/master/app/assets/javascripts)?) in the github repo, I guess. By the way: if I see correctly the main page uses [Leaflet](//wiki.openstreetmap.org/wiki/Leaflet), not (anymore) [OpenLayers](//wiki.openstreetmap.org/wiki/OpenLayers).[OpenLayers](//wiki.openstreetmap.org/wiki/OpenLayers).

I have not looked at the code before / am not involved, but I think you are searching for this: [The Rails Port](//wiki.openstreetmap.org/wiki/The_Rails_Port#Getting_the_OpenStreetMap_code) and especially the [source code of the main osm page](https://github.com/openstreetmap/openstreetmap-website/blob/master/app/views/site/index.html.erb). Well, the main JavaScript code is still loaded into some placeholders there - somewhere ([/app/assets/javascripts](https://github.com/openstreetmap/openstreetmap-website/blob/master/app/assets/javascripts)?) in the github repo, I guess. By the way: if I see correctly the main page uses [Leaflet](//wiki.openstreetmap.org/wiki/Leaflet), not (anymore) [OpenLayers](//wiki.openstreetmap.org/wiki/OpenLayers).

I have not looked at the code before / am not involved, but I think you are searching for this: [The Rails Port](//wiki.openstreetmap.org/wiki/The_Rails_Port#Getting_the_OpenStreetMap_code) and especially the [source code of the main osm page](https://github.com/openstreetmap/openstreetmap-website/blob/master/app/views/site/index.html.erb).page](https://github.com/openstreetmap/openstreetmap-website/blob/master/app/views/site/index.html.erb). By the way: if I see correctly the main page uses [Leaflet](//wiki.openstreetmap.org/wiki/Leaflet), not (anymore) [OpenLayers](//wiki.openstreetmap.org/wiki/OpenLayers).

I have not looked at the code before / am not involved, but I think you are searching for this: [The_Rails_Port](//wiki.openstreetmap.org/wiki/The_Rails_Port#Getting_the_OpenStreetMap_code) [The Rails Port](//wiki.openstreetmap.org/wiki/The_Rails_Port#Getting_the_OpenStreetMap_code) and especially the [source code of the main osm page](https://github.com/openstreetmap/openstreetmap-website/blob/master/app/views/site/index.html.erb).

I have not looked at the code before / am not involved, but I think you are searching for this: [The_Rails_Port](//wiki.openstreetmap.org/wiki/The_Rails_Port#Getting_the_OpenStreetMap_code) and especially the [source code of the main osm page](https://github.com/openstreetmap/openstreetmap-website/blob/master/app/views/site/index.html.erb).