feat(Forms): add support for using a function references instead of a string based id

packages/dnb-design-system-portal/src/docs/uilib/extensions/forms/Form/getData/info.mdx

@@ -23,7 +23,7 @@ const { getValue, data, filterData, reduceToVisibleFields } =
 - `filterData` will filter the data based on your own logic.
 - `reduceToVisibleFields` will reduce the given data set to only contain the visible fields (mounted fields).
 
-You link them together via the `id` (string) property.
+You link them together via the `id` (string, function, object or React Context as the reference) property.
 
 TypeScript support:
 

packages/dnb-design-system-portal/src/docs/uilib/extensions/forms/Form/setData/info.mdx

@@ -16,7 +16,7 @@ function Component() {
 }
 ```
 
-You link them together via the `id` (string) property.
+You link them together via the `id` (string, function, object or React Context as the reference) property.
 
 Related helpers:
 

packages/dnb-design-system-portal/src/docs/uilib/extensions/forms/Form/useData/info.mdx

@@ -42,7 +42,7 @@ render(
 
 ## Usage
 
-You can use the `Form.useData` hook with or without an `id` (string) property, which is optional and can be used to link the data to a specific [Form.Handler](/uilib/extensions/forms/Form/Handler/) component.
+You can use the `Form.useData` hook with or without an `id` (string, function, object or React Context as the reference) property, which is optional and can be used to link the data to a specific [Form.Handler](/uilib/extensions/forms/Form/Handler/) component.
 
 ### Without an `id` property
 
@@ -66,7 +66,7 @@ function Component() {
 
 ### With an `id` property
 
-While in this example, "Component" is outside the `Form.Handler` context, but linked together via the `id` (string) property:
+While in this example, "Component" is outside the `Form.Handler` context, but linked together via the `id` (string, function, object or React Context as the reference) property:
 
 ```jsx
 import { Form } from '@dnb/eufemia/extensions/forms'

packages/dnb-design-system-portal/src/docs/uilib/extensions/forms/Form/useSnapshot/info.mdx

@@ -61,7 +61,7 @@ You can check out examples in the demo section.
 
 ## Usage of the `Form.useSnapshot` hook
 
-You can use the `Form.useSnapshot` hook with or without an `id` (string) property, which is optional and can be used to link the data to a specific [Form.Handler](/uilib/extensions/forms/Form/Handler/) component.
+You can use the `Form.useSnapshot` hook with or without an `id` (string, function, object or React Context as the reference) property, which is optional and can be used to link the data to a specific [Form.Handler](/uilib/extensions/forms/Form/Handler/) component.
 
 ### Without an `id` property
 
@@ -85,7 +85,7 @@ function Component() {
 
 ### With an `id` property
 
-While in this example, "Component" is outside the `Form.Handler` context, but linked together via the `id` (string) property:
+While in this example, "Component" is outside the `Form.Handler` context, but linked together via the `id` (string, function, object or React Context as the reference) property:
 
 ```jsx
 import { Form } from '@dnb/eufemia/extensions/forms'

packages/dnb-design-system-portal/src/docs/uilib/extensions/forms/Form/useValidation/info.mdx

@@ -45,7 +45,7 @@ function Component() {
 }
 ```
 
-Or by linking the hook together with the form by using the `id` (string) property:
+Or by linking the hook together with the form by using the `id` (string, function, object or React Context as the reference) property:
 
 ```jsx
 import { Form } from '@dnb/eufemia/extensions/forms'

packages/dnb-design-system-portal/src/docs/uilib/extensions/forms/Wizard/Container/info.mdx

@@ -117,7 +117,7 @@ const MyForm = () => {
 }
 ```
 
-When using the `useStep` hook outside of the `Wizard.Container` context, you need to provide an unique `id` (string):
+When using the `useStep` hook outside of the `Wizard.Container` context, you need to provide an unique `id` (string, function, object or React Context as the reference):
 
 ```tsx
 import { Form, Wizard } from '@dnb/eufemia/extensions/forms'

packages/dnb-design-system-portal/src/docs/uilib/extensions/forms/Wizard/location-hooks/info.mdx

@@ -106,7 +106,7 @@ function MyForm() {
 
 ## Without a router
 
-You connect the hook with the `Wizard.Container` component via an unique `id` (string). The `id` will be used in the URL query string: `url?unique-id-step=1`.
+You connect the hook with the `Wizard.Container` component via an unique `id` (string, function, object or React Context as the reference). The `id` will be used in the URL query string: `url?unique-id-step=1`.
 
 ```jsx
 import { Form, Wizard } from '@dnb/eufemia/extensions/forms'

packages/dnb-design-system-portal/src/docs/uilib/extensions/forms/Wizard/useStep/info.mdx

@@ -26,7 +26,7 @@ function MyForm() {
 }
 ```
 
-You can also connect the hook with the `Wizard.Container` via an `id` (string). This lets you render the hook outside of the context:
+You can also connect the hook with the `Wizard.Container` via an `id` (string, function, object or React Context as the reference). This lets you render the hook outside of the context:
 
 ```jsx
 import { Form } from '@dnb/eufemia/extensions/forms'

packages/dnb-design-system-portal/src/docs/uilib/extensions/forms/getting-started.mdx

@@ -128,9 +128,11 @@ Here is an example of how to use these methods:
 ```jsx
 import { Form } from '@dnb/eufemia/extensions/forms'
 
+const myFormId = 'unique-id' // or a function, object or React Context reference
+
 function MyForm() {
   return (
-    <Form.Handler id="unique-id">
+    <Form.Handler id={myFormId}>
       <MyComponent />
     </Form.Handler>
   )
@@ -145,15 +147,15 @@ function MyComponent() {
     data,
     filterData,
     reduceToVisibleFields,
-  } = Form.useData() // optionally provide an id (unique-id)
+  } = Form.useData() // optionally provide an id or reference
 }
 
 // You can also use the setData:
-Form.setData('unique-id', { companyName: 'DNB' })
+Form.setData(myFormId, { companyName: 'DNB' })
 
 // ... and the getData – method when ever you need to:
 const { getValue, data, filterData, reduceToVisibleFields } =
-  Form.getData('unique-id')
+  Form.getData(myFormId)
 ```
 
 - `getValue` will return the value of the given path.

packages/dnb-eufemia/src/extensions/forms/DataContext/Context.ts

@@ -7,14 +7,14 @@ import {
   Path,
   EventStateObject,
   EventReturnWithStateObject,
-  Identifier,
   FieldProps,
   ValueProps,
   OnChange,
   OnSubmitParams,
 } from '../types'
 import { Props as ProviderProps } from './Provider'
 import { SnapshotName } from '../Form/Snapshot'
+import { SharedStateId } from '../../../shared/helpers/useSharedState'
 
 export type MountState = {
   isPreMounted?: boolean
@@ -85,7 +85,7 @@ export type FieldConnections = {
 }
 
 export interface ContextState {
-  id?: Identifier
+  id?: SharedStateId
   hasContext: boolean
   /** The dataset for the form / form wizard */
   data: any

packages/dnb-eufemia/src/extensions/forms/DataContext/Provider/Provider.tsx

@@ -33,7 +33,11 @@ import { debounce } from '../../../../shared/helpers'
 import FieldPropsProvider from '../../Field/Provider'
 import useUpdateEffect from '../../../../shared/helpers/useUpdateEffect'
 import { isAsync } from '../../../../shared/helpers/isAsync'
-import { useSharedState } from '../../../../shared/helpers/useSharedState'
+import {
+  SharedStateId,
+  createReferenceKey,
+  useSharedState,
+} from '../../../../shared/helpers/useSharedState'
 import SharedContext, { ContextProps } from '../../../../shared/Context'
 import useTranslation from '../../hooks/useTranslation'
 import DataContext, {
@@ -74,7 +78,7 @@ export interface Props<Data extends JsonObject>
   /**
    * Unique ID to communicate with the hook Form.useData
    */
-  id?: string
+  id?: SharedStateId
   /**
    * Unique ID to connect with a GlobalStatus
    */
@@ -618,10 +622,10 @@ export default function Provider<Data extends JsonObject>(
   // - Shared state
   const sharedData = useSharedState<Data>(id)
   const sharedAttachments = useSharedState<SharedAttachments<Data>>(
-    id + '-attachments'
+    createReferenceKey(id, 'attachments')
   )
   const sharedDataContext = useSharedState<ContextState>(
-    id + '-data-context'
+    createReferenceKey(id, 'data-context')
   )
 
   const setSharedData = sharedData.set

packages/dnb-eufemia/src/extensions/forms/DataContext/Provider/ProviderDocs.ts

@@ -13,7 +13,7 @@ export const ProviderProperties: PropertiesTableProps = {
   },
   id: {
     doc: 'Unique id for connecting Form.Handler and helper tools such as Form.useData.',
-    type: 'string',
+    type: ['string', 'Function', 'Object', 'React.Context'],
     status: 'optional',
   },
   schema: {

packages/dnb-eufemia/src/extensions/forms/Form/Element/__tests__/Element.test.tsx

@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/ban-ts-comment */
 import React from 'react'
 import { fireEvent, render } from '@testing-library/react'
 import { Form, DataContext, Field } from '../../..'
@@ -151,4 +152,17 @@ describe('Form.Element', () => {
     expect(attributes).toEqual(['class', 'aria-label'])
     expect(formElement.getAttribute('aria-label')).toBe('Aria Label')
   })
+
+  it('should ensure that only a string can be set as the id', () => {
+    const myId = () => null
+    render(
+      // @ts-expect-error
+      <Form.Element id={myId}>
+        <Form.SubmitButton>Submit</Form.SubmitButton>
+      </Form.Element>
+    )
+
+    const formElement = document.querySelector('form')
+    expect(formElement).not.toHaveAttribute('id')
+  })
 })