fix(core): use center position of handle as snapping point for connection lines

.github/actions/install-dependencies/action.yaml

@@ -26,7 +26,7 @@ runs:
       uses: actions/cache@v4
       with:
         path: ${{ steps.pnpm-cache.outputs.STORE_PATH }}
-        key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+        key: ${{ runner.os }}-pnpm-store-${{ hashFiles('pnpm-lock.yaml') }}
         restore-keys: |
           ${{ runner.os }}-pnpm-store-
 

.github/workflows/build-and-test.yml

@@ -54,5 +54,3 @@ jobs:
         with:
           install-command: pnpm cypress install
           command: pnpm run test --cache-dir=.turbo
-          browser: chrome
-          component: true

examples/vite/src/EasyConnect/EasyConnect.vue

@@ -1,12 +1,10 @@
 <script lang="ts" setup>
 import { ref } from 'vue'
 import { Background } from '@vue-flow/background'
-import { Controls } from '@vue-flow/controls'
-import { MiniMap } from '@vue-flow/minimap'
-import type { Elements } from '@vue-flow/core'
+import type { Node } from '@vue-flow/core'
 import { MarkerType, VueFlow, useVueFlow } from '@vue-flow/core'
 import CustomNode from './CustomNode.vue'
-import CustomConnectionLine from './CustomConnectionLine.vue'
+import FloatingConnectionLine from './FloatingConnectionLine.vue'
 import FloatingEdge from './FloatingEdge.vue'
 
 const { onConnect, addEdges } = useVueFlow()
@@ -20,7 +18,7 @@ const defaultEdgeOptions = {
   },
 }
 
-const elements = ref<Elements>([
+const nodes = ref<Node[]>([
   {
     id: '1',
     type: 'custom',
@@ -43,37 +41,31 @@ const elements = ref<Elements>([
   },
 ])
 
+const edges = ref([])
+
 onConnect(addEdges)
 </script>
 
 <template>
-  <div style="height: 100vh">
-    <VueFlow
-      v-model="elements"
-      :elevate-nodes-on-select="false"
-      class="vue-flow-basic-example"
-      :default-zoom="1.5"
-      :default-edge-options="defaultEdgeOptions"
-      :min-zoom="0.2"
-      :max-zoom="4"
-    >
-      <Background pattern-color="#aaa" :gap="8" />
-
-      <MiniMap />
-
-      <Controls />
+  <VueFlow
+    v-model:nodes="nodes"
+    v-model:edges="edges"
+    :elevate-nodes-on-select="false"
+    :default-edge-options="defaultEdgeOptions"
+    fit-view-on-init
+  >
+    <Background pattern-color="#aaa" :gap="8" />
 
-      <template #node-custom="props">
-        <CustomNode :id="props.id" />
-      </template>
+    <template #node-custom="props">
+      <CustomNode :id="props.id" />
+    </template>
 
-      <template #edge-floating="fProps">
-        <FloatingEdge v-bind="fProps" />
-      </template>
+    <template #edge-floating="fProps">
+      <FloatingEdge v-bind="fProps" />
+    </template>
 
-      <template #connection-line="cProps">
-        <CustomConnectionLine v-bind="cProps" />
-      </template>
-    </VueFlow>
-  </div>
+    <template #connection-line="cProps">
+      <FloatingConnectionLine v-bind="cProps" />
+    </template>
+  </VueFlow>
 </template>

examples/vite/src/EasyConnect/CustomConnectionLine.vue → examples/vite/src/EasyConnect/FloatingConnectionLine.vue

@@ -1,9 +1,9 @@
 <script lang="ts" setup>
-import type { GraphNode } from '@vue-flow/core'
-import { getStraightPath } from '@vue-flow/core'
+import type { ConnectionLineProps } from '@vue-flow/core'
+import { BaseEdge, getStraightPath } from '@vue-flow/core'
 import { computed } from 'vue'
 
-const props = defineProps<{ sourceNode: GraphNode; sourceX: number; sourceY: number; targetX: number; targetY: number }>()
+const props = defineProps<ConnectionLineProps>()
 
 const edgePath = computed(() =>
   getStraightPath({
@@ -15,13 +15,12 @@ const edgePath = computed(() =>
 
 <template>
   <g>
-    <path
+    <BaseEdge
       :style="{
         strokeWidth: 3,
         stroke: 'black',
       }"
-      fill="none"
-      :d="edgePath[0]"
+      :path="edgePath[0]"
     />
     <circle :cx="targetX" :cy="targetY" fill="black" :r="3" stroke="black" :stroke-width="1.5" />
   </g>

examples/vite/src/EasyConnect/FloatingEdge.vue

@@ -1,11 +1,11 @@
 <script lang="ts" setup>
-import type { GraphNode } from '@vue-flow/core'
-import { getStraightPath } from '@vue-flow/core'
+import type { EdgeProps } from '@vue-flow/core'
+import { BaseEdge, getStraightPath } from '@vue-flow/core'
 import { computed } from 'vue'
 
 import { getEdgeParams } from './utils'
 
-const props = defineProps<{ id: string; sourceNode: GraphNode; targetNode: GraphNode; markerEnd: string; style: any }>()
+const props = defineProps<EdgeProps>()
 
 const edgeParams = computed(() => getEdgeParams(props.sourceNode, props.targetNode))
 
@@ -20,5 +20,5 @@ const edgePath = computed(() =>
 </script>
 
 <template>
-  <path :id="id" class="vue-flow__edge-path" :d="edgePath[0]" :marker-end="markerEnd" :style="style" />
+  <BaseEdge :id="id" :path="edgePath[0]" :marker-end="markerEnd" :style="style" />
 </template>

packages/core/src/components/ConnectionLine/index.ts

@@ -1,18 +1,11 @@
 import { computed, defineComponent, h, inject } from 'vue'
 import type { HandleElement } from '../../types'
 import { ConnectionLineType, ConnectionMode, Position } from '../../types'
-import { getHandlePosition, getMarkerId } from '../../utils'
+import { getHandlePosition, getMarkerId, oppositePosition } from '../../utils'
 import { useVueFlow } from '../../composables'
 import { Slots } from '../../context'
 import { getBezierPath, getSimpleBezierPath, getSmoothStepPath } from '../Edges/utils'
 
-const oppositePosition = {
-  [Position.Left]: Position.Right,
-  [Position.Right]: Position.Left,
-  [Position.Top]: Position.Bottom,
-  [Position.Bottom]: Position.Top,
-}
-
 const ConnectionLine = defineComponent({
   name: 'ConnectionLine',
   compatConfig: { MODE: 3 },
@@ -57,7 +50,7 @@ const ConnectionLine = defineComponent({
         return null
       }
 
-      const startHandleId = connectionStartHandle.value.handleId
+      const startHandleId = connectionStartHandle.value.id
 
       const handleType = connectionStartHandle.value.type
 
@@ -78,18 +71,18 @@ const ConnectionLine = defineComponent({
       const { x: fromX, y: fromY } = getHandlePosition(fromNode.value, fromHandle, fromPosition)
 
       let toHandle: HandleElement | null = null
-      if (toNode.value && connectionEndHandle.value?.handleId) {
+      if (toNode.value) {
         // if connection mode is strict, we only look for handles of the opposite type
         if (connectionMode.value === ConnectionMode.Strict) {
           toHandle =
             toNode.value.handleBounds[handleType === 'source' ? 'target' : 'source']?.find(
-              (d) => d.id === connectionEndHandle.value?.handleId,
+              (d) => d.id === connectionEndHandle.value?.id,
             ) || null
         } else {
           // if connection mode is loose, look for the handle in both source and target bounds
           toHandle =
             [...(toNode.value.handleBounds.source || []), ...(toNode.value.handleBounds.target || [])]?.find(
-              (d) => d.id === connectionEndHandle.value?.handleId,
+              (d) => d.id === connectionEndHandle.value?.id,
             ) || null
         }
       }

packages/core/src/components/Edges/EdgeWrapper.ts

@@ -8,7 +8,7 @@ import {
   ErrorCode,
   VueFlowError,
   elementSelectionKeys,
-  getHandle,
+  getEdgeHandle,
   getHandlePosition,
   getMarkerId,
 } from '../../utils'
@@ -150,7 +150,7 @@ const EdgeWrapper = defineComponent({
         sourceNodeHandles = [...(sourceNode.handleBounds.source || []), ...(sourceNode.handleBounds.target || [])]
       }
 
-      const sourceHandle = getHandle(sourceNodeHandles, edge.value.sourceHandle)
+      const sourceHandle = getEdgeHandle(sourceNodeHandles, edge.value.sourceHandle)
 
       let targetNodeHandles
       if (connectionMode.value === ConnectionMode.Strict) {
@@ -159,7 +159,7 @@ const EdgeWrapper = defineComponent({
         targetNodeHandles = [...(targetNode.handleBounds.target || []), ...(targetNode.handleBounds.source || [])]
       }
 
-      const targetHandle = getHandle(targetNodeHandles, edge.value.targetHandle)
+      const targetHandle = getEdgeHandle(targetNodeHandles, edge.value.targetHandle)
 
       const sourcePosition = sourceHandle?.position || Position.Bottom
 

packages/core/src/components/Handle/Handle.vue

@@ -19,6 +19,7 @@ const type = toRef(() => props.type ?? 'source')
 const isValidConnection = toRef(() => props.isValidConnection ?? null)
 
 const {
+  id: flowId,
   connectionStartHandle,
   connectionClickStartHandle,
   connectionEndHandle,
@@ -39,17 +40,17 @@ const isConnectableEnd = toRef(() => (typeof connectableEnd !== 'undefined' ? co
 const isConnecting = toRef(
   () =>
     (connectionStartHandle.value?.nodeId === nodeId &&
-      connectionStartHandle.value?.handleId === handleId &&
+      connectionStartHandle.value?.id === handleId &&
       connectionStartHandle.value?.type === type.value) ||
     (connectionEndHandle.value?.nodeId === nodeId &&
-      connectionEndHandle.value?.handleId === handleId &&
+      connectionEndHandle.value?.id === handleId &&
       connectionEndHandle.value?.type === type.value),
 )
 
 const isClickConnecting = toRef(
   () =>
     connectionClickStartHandle.value?.nodeId === nodeId &&
-    connectionClickStartHandle.value?.handleId === handleId &&
+    connectionClickStartHandle.value?.id === handleId &&
     connectionClickStartHandle.value?.type === type.value,
 )
 
@@ -127,6 +128,8 @@ onMounted(() => {
     position,
     x: (handleBounds.left - nodeBounds.left) / zoom,
     y: (handleBounds.top - nodeBounds.top) / zoom,
+    type: type.value,
+    nodeId,
     ...getDimensions(handle.value),
   }
 
@@ -177,7 +180,7 @@ export default {
 <template>
   <div
     ref="handle"
-    :data-id="`${nodeId}-${handleId}-${type}`"
+    :data-id="`${flowId}-${nodeId}-${handleId}-${type}`"
     :data-handleid="handleId"
     :data-nodeid="nodeId"
     :data-handlepos="position"