TLBindingUpdate • tldraw Docs

Type for updating existing bindings with partial properties. Only the id and type are required, all other properties are optional.

type TLBindingUpdate<T extends TLBinding = TLBinding> = T extends T
  ? {
      fromId?: T['fromId']
      id: TLBindingId
      meta?: Partial<T['meta']>
      props?: Partial<T['props']>
      toId?: T['toId']
      type: T['type']
      typeName?: T['typeName']
    }
  : never

Example

// Update arrow binding properties
const bindingUpdate: TLBindingUpdate<TLArrowBinding> = {
  id: 'binding:arrow1',
  type: 'arrow',
  props: {
    normalizedAnchor: { x: 0.7, y: 0.3 }, // Only update anchor position
  },
}

editor.updateBindings([bindingUpdate])