Is there a method to find which ways a given/selected node is a part of?
I can find methods to locate nodes not part of any ways and for finding all nodes that a given way consist of… but I can’t seem to unveil any path to discovering ways from a selected node.
Maybe you can describe a little bit more what you try to achieve with JOSM? How did you manage to have a node in JOSM without downloading his corresponding way?
As JOSM has been mentioned:
With the node selected you can download all parent ways with: File > Download parent ways/relations (Ctrl+Alt+D). I think this is unnecessary if it has been downloaded using the normal bounding box as that download all parents automatically.
You can then use Selection > Adjacent ways (Shift+E) to select the ways connected to that node. They will then be displayed in the selection panel.
In iD you can simply mark any node and show all the ways sharing this node by pressing CTRL + ↑.
Never used API but this should be the correct call:
https://wiki.openstreetmap.org/wiki/API_v0.6#Ways_for_node:_GET_/api/0.6/node/#id/ways