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README.md

@prosemirror-adapter/react

React adapter for ProseMirror.

Example

You can view the example in prosemirror-adapter/examples/react.

Open in StackBlitz

Getting Started

Install the package

npm install @prosemirror-adapter/react

Wrap your component with provider

import { ProsemirrorAdapterProvider } from '@prosemirror-adapter/react'
import { YourAwesomeEditor } from 'somewhere'

export function Component() {
  return (
    <ProsemirrorAdapterProvider>
      <YourAwesomeEditor />
    </ProsemirrorAdapterProvider>
  )
}

Play with node view

In this section we will implement a node view for paragraph node.

Build component for node view

import { useNodeViewContext } from '@prosemirror-adapter/react'

function Paragraph() {
  const { contentRef, selected } = useNodeViewContext()
  return <div style={{ outline: selected ? 'blue solid 1px' : 'none' }} role="presentation" ref={contentRef} />
}

Bind node view components with prosemirror

import { useNodeViewFactory } from '@prosemirror-adapter/react'
import type { FC } from 'react'
import { useCallback, useRef } from 'react'

import { Paragraph } from './Paragraph'

export const YourAwesomeEditor: FC = () => {
  const nodeViewFactory = useNodeViewFactory()

  const editorRef = useCallback(
    (element: HTMLDivElement) => {
      if (!element || element.firstChild) return

      const editorView = new EditorView(element, {
        state: YourProsemirrorEditorState,
        nodeViews: {
          paragraph: nodeViewFactory({
            component: Paragraph,
            // Optional: add some options
            as: 'div',
            contentAs: 'p',
          }),
        },
      })
    },
    [nodeViewFactory],
  )

  return <div className="editor" ref={editorRef} />
}

🚀 Congratulations! You have built your first react node view with prosemirror-adapter.

Play with mark view

In this section we will implement a mark view for links that changes color periodically.

Build component for mark view

import { useEffect, useState } from 'react'
import { useMarkViewContext } from '@prosemirror-adapter/react'

const colors = [
  '#f06292',
  '#ba68c8',
  '#9575cd',
  '#7986cb',
  '#64b5f6',
  '#4fc3f7',
  '#4dd0e1',
  '#4db6ac',
  '#81c784',
  '#aed581',
  '#ffb74d',
  '#ffa726',
  '#ff8a65',
  '#d4e157',
  '#ffd54f',
  '#ffecb3',
]

function pickRandomColor() {
  return colors[Math.floor(Math.random() * colors.length)]
}

export function Link() {
  const [color, setColor] = useState(colors[0])
  const { mark, contentRef } = useMarkViewContext()
  const href = mark.attrs.href as string
  const title = mark.attrs.title as string | null

  useEffect(() => {
    const interval = setInterval(() => {
      setColor(pickRandomColor())
    }, 1000)
    return () => clearInterval(interval)
  }, [])

  return (
    <a
      href={href}
      ref={contentRef}
      style={{ color, transition: 'color 1s ease-in-out' }}
      title={title || undefined}
    ></a>
  )
}

Bind mark view components with prosemirror

import { useMarkViewFactory } from '@prosemirror-adapter/react'
import type { FC } from 'react'
import { useCallback } from 'react'

export const YourAwesomeEditor: FC = () => {
  const markViewFactory = useMarkViewFactory()

  const editorRef = useCallback(
    (element: HTMLDivElement) => {
      if (!element || element.firstChild) return

      const editorView = new EditorView(element, {
        state: EditorState.create({
          schema: YourProsemirrorSchema,
          plugins: [
            new Plugin({
              props: {
                markViews: {
                  link: markViewFactory({
                    component: Link,
                  }),
                },
              },
            }),
          ],
        }),
      })
    },
    [markViewFactory],
  )

  return <div className="editor" ref={editorRef} />
}

🚀 Congratulations! You have built your first react mark view with prosemirror-adapter.

Play with plugin view

In this section we will implement a plugin view that will display the size of the document.

Build component for plugin view

import { usePluginViewContext } from '@prosemirror-adapter/react'

function Size() {
  const { view } = usePluginViewContext()
  const size = view.state.doc.nodeSize
  return <div>Size for document: {size}</div>
}

Bind plugin view components with prosemirror

import { usePluginViewFactory } from '@prosemirror-adapter/react'
import type { FC } from 'react'
import { useCallback, useRef } from 'react'
import { Plugin } from 'prosemirror-state'

import { Paragraph } from './Paragraph'

export const YourAwesomeEditor: FC = () => {
  const pluginViewFactory = usePluginViewFactory()

  const editorRef = useCallback(
    (element: HTMLDivElement) => {
      if (!element || element.firstChild) return

      const editorView = new EditorView(element, {
        state: EditorState.create({
          schema: YourProsemirrorSchema,
          plugins: [
            new Plugin({
              view: pluginViewFactory({
                component: Size,
              }),
            }),
          ],
        }),
      })
    },
    [pluginViewFactory],
  )

  return <div className="editor" ref={editorRef} />
}

🚀 Congratulations! You have built your first react plugin view with prosemirror-adapter.

Play with widget view

In this section we will implement a widget view that will add hashes for heading when selected.

Build component for widget decoration view

import { useWidgetViewContext } from '@prosemirror-adapter/react'

export function Hashes() {
  const { spec } = useWidgetViewContext()
  const level = spec?.level
  const hashes = Array(level || 0)
    .fill('#')
    .join('')

  return <span style={{ color: 'blue', marginRight: 6 }}>{hashes}</span>
}

Bind widget view components with prosemirror

import { useWidgetViewFactory } from '@prosemirror-adapter/react'
import type { FC } from 'react'
import { useCallback, useRef } from 'react'
import { Plugin } from 'prosemirror-state'

import { Hashes } from './Hashes'

export const YourAwesomeEditor: FC = () => {
  const widgetViewFactory = useWidgetViewFactory()

  const editorRef = useCallback(
    (element: HTMLDivElement) => {
      if (!element || element.firstChild) return

      const getHashWidget = widgetViewFactory({
        as: 'i',
        component: Hashes,
      })

      const editorView = new EditorView(element, {
        state: EditorState.create({
          schema: YourProsemirrorSchema,
          plugins: [
            new Plugin({
              props: {
                decorations(state) {
                  const { $from } = state.selection
                  const node = $from.node()
                  if (node.type.name !== 'heading') return DecorationSet.empty

                  const widget = getHashWidget($from.before() + 1, {
                    side: -1,
                    level: node.attrs.level,
                  })

                  return DecorationSet.create(state.doc, [widget])
                },
              },
            }),
          ],
        }),
      })
    },
    [widgetViewFactory],
  )

  return <div className="editor" ref={editorRef} />
}

🚀 Congratulations! You have built your first react widget view with prosemirror-adapter.

API

Node view API

useNodeViewFactory: () => (options: NodeViewFactoryOptions) => NodeView

type DOMSpec = string | HTMLElement | ((node: Node) => HTMLElement)

interface NodeViewFactoryOptions {
  // Component
  component: ReactComponent

  // The DOM element to use as the root node of the node view.
  as?: DOMSpec
  // The DOM element that contains the content of the node.
  contentAs?: DOMSpec

  // Overrides: this part is equal to properties of [NodeView](https://prosemirror.net/docs/ref/#view.NodeView)
  update?: (node: Node, decorations: readonly Decoration[], innerDecorations: DecorationSource) => boolean | void
  ignoreMutation?: (mutation: ViewMutationRecord) => boolean | void
  selectNode?: () => void
  deselectNode?: () => void
  setSelection?: (anchor: number, head: number, root: Document | ShadowRoot) => void
  stopEvent?: (event: Event) => boolean
  destroy?: () => void

  // Called when the node view is updated.
  onUpdate?: () => void
}

useNodeViewContext: () => NodeViewContext

interface NodeViewContext {
  // The DOM element that contains the content of the node.
  contentRef: NodeViewContentRef

  // The prosemirror editor view.
  view: EditorView

  // Get prosemirror position of current node view.
  getPos: () => number | undefined

  // Set node.attrs of current node.
  setAttrs: (attrs: Attrs) => void

  // The prosemirror node for current node.
  node: Node

  // The prosemirror decorations for current node.
  decorations: readonly Decoration[]

  // The prosemirror inner decorations for current node.
  innerDecorations: DecorationSource

  // Whether the node is selected.
  selected: boolean
}

Mark view API

useMarkViewFactory: () => (options: MarkViewFactoryOptions) => MarkView

type MarkViewDOMSpec = string | HTMLElement | ((mark: Mark) => HTMLElement)

interface MarkViewFactoryOptions {
  // Component
  component: ReactComponent

  // The DOM element to use as the root node of the mark view
  as?: MarkViewDOMSpec

  // The DOM element that contains the content of the mark
  contentAs?: MarkViewDOMSpec

  // Called when the mark view is destroyed
  destroy?: () => void
}

useMarkViewContext: () => MarkViewContext

interface MarkViewContext {
  // The DOM element that contains the content of the mark
  contentRef: MarkViewContentRef

  // The prosemirror editor view
  view: EditorView

  // The prosemirror mark for current mark view
  mark: Mark

  // Whether the mark is inline
  inline: boolean
}

Plugin view API

usePluginViewFactory: () => (options: PluginViewFactoryOptions) => PluginView

interface PluginViewFactoryOptions {
  // Component
  component: ReactComponent

  // The DOM element to use as the root node of the plugin view.
  // The `viewDOM` here means `EditorState.view.dom`.
  // By default, it will be `EditorState.view.dom.parentElement`.
  root?: (viewDOM: HTMLElement) => HTMLElement

  // Overrides: this part is equal to properties of [PluginView](https://prosemirror.net/docs/ref/#state.PluginView)
  update?: (view: EditorView, prevState: EditorState) => void
  destroy?: () => void
}

usePluginViewContext: () => PluginViewContext

interface PluginViewContext {
  // The prosemirror editor view.
  view: EditorView

  // The previously prosemirror editor state.
  // Will be `undefined` when the plugin view is created.
  prevState?: EditorState
}

Widget view API

useWidgetViewFactory: () => (options: WidgetViewFactoryOptions) => WidgetDecorationFactory

type WidgetDecorationFactory = (pos: number, spec?: WidgetDecorationSpec) => Decoration

interface WidgetViewFactoryOptions {
  // Component
  component: ReactComponent

  // The DOM element to use as the root node of the widget view.
  as: string | HTMLElement
}

useWidgetViewContext: () => WidgetViewContext

interface WidgetViewContext {
  // The prosemirror editor view.
  view: EditorView

  // Get the position of the widget.
  getPos: () => number | undefined

  // Get the [spec](https://prosemirror.net/docs/ref/#view.Decoration^widget^spec) of the widget.
  spec?: WidgetDecorationSpec
}

Troubleshooting

I'm getting an error: "flushSync was called from inside a lifecycle method"

This can happen if you're adding or removing a plugin to the editor inside a lifecycle method (e.g. useEffect and useLayoutEffect), like the code block below.

import { addPlugin, removePlugin, nodeViewPlugin } from './utils'

function MyEditor() {
  const [enablePlugin, setEnablePlugin] = useState(true)

  useEffect(() => {
    if (!enablePlugin) return

    const view = viewRef.current

    // Add or remove a new plugin to the editor, which renders node view using React components by
    // using `prosemirror-adapter` under the hood.
    addPlugin(view, nodeViewPlugin)
    return () => removePlugin(view, nodeViewPlugin)
  }, [enablePlugin])

  // ...
}

When updating such a plugin, ProseMirror might need to redraw some nodes using (or not using) React components. During this process, ProseMirror will first stop the DOMObserver, redraw the nodes, and then resume the DOMObserver. This process is synchronous, so React.flushSync is called internally to ensure the React components are updated before the DOMObserver resumes.

This is roughly equivalent to:

useEffect(() => {
  React.flushSync(() => {
    setSomething(newValue)
  })
}, [])

This pattern violates React's rules.

To fix this, put the plugin update logic inside a task (via setTimeout) or microtask (via queueMicrotask).

The example code above can be fixed by:

import { addPlugin, removePlugin, nodeViewPlugin } from './utils'

function MyEditor() {
  const [enablePlugin, setEnablePlugin] = useState(true)

  useEffect(() => {
    if (!enablePlugin) return

    const view = viewRef.current

    queueMicrotask(() => addPlugin(view, nodeViewPlugin))
    return () => queueMicrotask(() => removePlugin(view, nodeViewPlugin))
  }, [enablePlugin])

  // ...
}

Contributing

Follow our contribution guide to learn how to contribute to prosemirror-adapter.

License

MIT