fix(core): avoid adding invalid edges (like null or undefined)

packages/core/src/store/actions.ts

@@ -448,14 +448,14 @@ export function useActions(
     nextEdges = Array.isArray(nextEdges) ? nextEdges : [nextEdges]
 
     const validEdges = state.isValidConnection
-      ? nextEdges.filter((edge) =>
-          state.isValidConnection!(edge, {
+      ? nextEdges.filter((edge) => {
+          return state.isValidConnection?.(edge, {
             edges: state.edges,
             nodes: state.nodes,
             sourceNode: findNode(edge.source)!,
             targetNode: findNode(edge.target)!,
-          }),
-        )
+          })
+        })
       : nextEdges
 
     const changes = validEdges.reduce((edgeChanges, connection) => {

packages/core/src/utils/store.ts

@@ -16,8 +16,8 @@ export function addEdgeToStore(
   triggerError: State['hooks']['error']['trigger'],
   defaultEdgeOptions?: DefaultEdgeOptions,
 ): GraphEdge | false {
-  if (!edgeParams.source || !edgeParams.target) {
-    triggerError(new VueFlowError(ErrorCode.EDGE_INVALID, (edgeParams as Edge).id))
+  if (!edgeParams || !edgeParams.source || !edgeParams.target) {
+    triggerError(new VueFlowError(ErrorCode.EDGE_INVALID, (edgeParams as undefined | Edge)?.id ?? `[ID UNKNOWN]`))
     return false
   }