Label an edge as you draw it

Collect an edge's label from the user the moment it's drawn — no custom modal wiring — and pick the UI to fit the gesture. The before-create hook's context offers two helpers: ctx.promptLabel({ mode }) drops a single free-text field (inline at the edge's midpoint, or in a modal), and ctx.promptData({ fields }) opens a modal form built from the same field system as the node editor. Whatever is entered becomes the new edge's data.label; cancelling (resolving null) creates nothing.

Click Edit Graph (top-right) → Add Edge, then connect two people:

• Drag from one node to another → a quick inline field to type any label.
• Click one node then another → a modal with a dropdown of predefined relationship labels; choose one and Create edge.

For the zero-code case, the static option UI: { editors: { edgeEditor: { labelPrompt: 'inline' } } } prompts for a free-text label on every edge with no callback at all.

Options

// The before-create hook picks the UI per gesture. A quick **drag** gets a free-text
// field inline at the edge midpoint (`ctx.promptLabel`); a deliberate **click-click**
// connect gets a modal with a dropdown of predefined labels (`ctx.promptData`). Both
// feed the chosen text into the new edge's `data.label`; a cancel (`null`) creates
// nothing.
const RELATIONSHIP_LABELS = [
    { value: 'mentors', label: 'mentors' },
    { value: 'reports to', label: 'reports to' },
    { value: 'collaborates with', label: 'collaborates with' },
    { value: 'manages', label: 'manages' }
]

const options = {
    UI: { mode: 'full' },
    callbacks: {
        onBeforeEdgeCreate: async (ctx) => {
            if (ctx.origin === 'drag') {
                // Drag → quick inline free-text field.
                const label = await ctx.promptLabel({ mode: 'inline', placeholder: 'Relationship…' })
                if (label === null) return false
                return { accept: true, data: { label }, directed: true }
            }

            // Click-click → modal with a dropdown of predefined labels.
            const values = await ctx.promptData({
                title: 'Label the connection',
                submitLabel: 'Create edge',
                fields: [
                    {
                        key: 'label',
                        label: 'Relationship',
                        type: 'select',
                        defaultValue: 'mentors',
                        options: RELATIONSHIP_LABELS
                    }
                ]
            })
            if (values === null) return false
            return { accept: true, data: { label: values.label }, directed: true }
        }
    }
}

Data

const data = {
    nodes: [
        { id: 'alice', data: { label: 'Alice' } },
        { id: 'bob', data: { label: 'Bob' } },
        { id: 'carol', data: { label: 'Carol' } },
        { id: 'dave', data: { label: 'Dave' } },
        { id: 'erin', data: { label: 'Erin' } }
    ],
    edges: [
        { from: 'alice', to: 'bob', data: { label: 'mentors' } }
    ]
}