Saving and Loading Content

Saving and loading content is a fundamental requirement for any editor. ProseKit provides flexible options for persisting your content in different formats, primarily JSON and HTML. This guide will show you how to implement content persistence in your ProseKit editor.

Supported Formats

ProseKit supports multiple content formats:

Format	Description	Best For
JSON	Native ProseMirror document structure	Long-term storage, preserving all features
HTML	Standard HTML markup	Interoperability with other systems, display

Working with JSON

JSON is the recommended format for storing ProseKit documents because it preserves the exact structure and all attributes of your content.

Saving Content as JSON

To get your document as JSON, use the getDocJSON() method:

// Get the current document as a JSON object
const jsonconst json: NodeJSON = editorconst editor: Editor<BasicExtension>.getDocJSONEditor<BasicExtension>.getDocJSON: () => NodeJSONReturn a JSON object representing the editor's current document.()

Loading Content from JSON

To load content from JSON when creating an editor:

// Create editor with the loaded content
const editorconst editor: Editor<BasicExtension> = createEditorcreateEditor<BasicExtension>(options: EditorOptions<BasicExtension>): Editor<BasicExtension>@public({
  extensionEditorOptions<BasicExtension>.extension: BasicExtensionThe extension to use when creating the editor.,
  defaultContentEditorOptions<E extends Extension>.defaultContent?: string | NodeJSON | HTMLElement | undefinedThe starting document to use when creating the editor. It can be a
ProseMirror node JSON object, a HTML string, or a HTML element instance.: jsonconst json: NodeJSON, // Pass the JSON object directly
})

Detecting Document Changes

To save content when the document changes, use the useDocChange hook:

import { useDocChangefunction useDocChange(handler: (doc: Node) => void, options?: UseExtensionOptions): voidCalls the given handler whenever the editor document changes.
@public } from 'prosekit/react'

useDocChangefunction useDocChange(handler: (doc: Node) => void, options?: UseExtensionOptions): voidCalls the given handler whenever the editor document changes.
@public(() => {
  // This runs whenever the document changes
  const jsonconst json: NodeJSON = editorconst editor: Editor<BasicExtension>.getDocJSONEditor<BasicExtension>.getDocJSON: () => NodeJSONReturn a JSON object representing the editor's current document.()
  localStoragevar localStorage: Storage[MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/localStorage).setItemStorage.setItem(key: string, value: string): voidSets the value of the pair identified by key to value, creating a new key/value pair if none existed for key previously.

Throws a "QuotaExceededError" DOMException exception if the new value couldn't be set. (Setting could fail if, e.g., the user has disabled storage for the site, or if the quota has been exceeded.)

Dispatches a storage event on Window objects holding an equivalent Storage object.

[MDN Reference](https://developer.mozilla.org/docs/Web/API/Storage/setItem)('my-document', JSONvar JSON: JSONAn intrinsic object that provides functions to convert JavaScript values to and from the JavaScript Object Notation (JSON) format..stringifyJSON.stringify(value: any, replacer?: (this: any, key: string, value: any) => any, space?: string | number): string (+1 overload)Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
@paramvalue A JavaScript value, usually an object or array, to be converted.@paramreplacer A function that transforms the results.@paramspace Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.(jsonconst json: NodeJSON))
}, { editorUseExtensionOptions.editor?: Editor<any> | undefinedThe editor to add the extension to. If not provided, it will use the
editor from the nearest `ProseKit` component. })

import { useDocChangefunction useDocChange(handler: (doc: Node) => void, options?: UseExtensionOptions): voidCalls the given handler whenever the editor document changes.
@public } from 'prosekit/vue'

useDocChangefunction useDocChange(handler: (doc: Node) => void, options?: UseExtensionOptions): voidCalls the given handler whenever the editor document changes.
@public(() => {
  // This runs whenever the document changes
  const jsonconst json: NodeJSON = editorconst editor: Editor<BasicExtension>.getDocJSONEditor<BasicExtension>.getDocJSON: () => NodeJSONReturn a JSON object representing the editor's current document.()
  localStoragevar localStorage: Storage[MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/localStorage).setItemStorage.setItem(key: string, value: string): voidSets the value of the pair identified by key to value, creating a new key/value pair if none existed for key previously.

Throws a "QuotaExceededError" DOMException exception if the new value couldn't be set. (Setting could fail if, e.g., the user has disabled storage for the site, or if the quota has been exceeded.)

Dispatches a storage event on Window objects holding an equivalent Storage object.

[MDN Reference](https://developer.mozilla.org/docs/Web/API/Storage/setItem)('my-document', JSONvar JSON: JSONAn intrinsic object that provides functions to convert JavaScript values to and from the JavaScript Object Notation (JSON) format..stringifyJSON.stringify(value: any, replacer?: (this: any, key: string, value: any) => any, space?: string | number): string (+1 overload)Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
@paramvalue A JavaScript value, usually an object or array, to be converted.@paramreplacer A function that transforms the results.@paramspace Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.(jsonconst json: NodeJSON))
}, { editorUseExtensionOptions.editor?: MaybeRefOrGetter<Editor<any>> | undefinedThe editor to add the extension to. If not provided, it will use the
editor from the nearest `ProseKit` component. })

import { useDocChangefunction useDocChange(handler: (doc: Node) => void, options?: UseExtensionOptions): voidCalls the given handler whenever the editor document changes.
@public } from 'prosekit/svelte'

useDocChangefunction useDocChange(handler: (doc: Node) => void, options?: UseExtensionOptions): voidCalls the given handler whenever the editor document changes.
@public(() => {
  // This runs whenever the document changes
  const jsonconst json: NodeJSON = editorconst editor: Editor<BasicExtension>.getDocJSONEditor<BasicExtension>.getDocJSON: () => NodeJSONReturn a JSON object representing the editor's current document.()
  localStoragevar localStorage: Storage[MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/localStorage).setItemStorage.setItem(key: string, value: string): voidSets the value of the pair identified by key to value, creating a new key/value pair if none existed for key previously.

Throws a "QuotaExceededError" DOMException exception if the new value couldn't be set. (Setting could fail if, e.g., the user has disabled storage for the site, or if the quota has been exceeded.)

Dispatches a storage event on Window objects holding an equivalent Storage object.

[MDN Reference](https://developer.mozilla.org/docs/Web/API/Storage/setItem)('my-document', JSONvar JSON: JSONAn intrinsic object that provides functions to convert JavaScript values to and from the JavaScript Object Notation (JSON) format..stringifyJSON.stringify(value: any, replacer?: (this: any, key: string, value: any) => any, space?: string | number): string (+1 overload)Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
@paramvalue A JavaScript value, usually an object or array, to be converted.@paramreplacer A function that transforms the results.@paramspace Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.(jsonconst json: NodeJSON))
}, { editorUseExtensionOptions.editor?: Editor<any> | undefinedThe editor to add the extension to. If not provided, it will use the
editor from the nearest `ProseKit` component. })

import { useDocChangefunction useDocChange(handler: (doc: Node) => void, options?: UseExtensionOptions): voidCalls the given handler whenever the editor document changes.
@public } from 'prosekit/preact'

useDocChangefunction useDocChange(handler: (doc: Node) => void, options?: UseExtensionOptions): voidCalls the given handler whenever the editor document changes.
@public(() => {
  // This runs whenever the document changes
  const jsonconst json: NodeJSON = editorconst editor: Editor<BasicExtension>.getDocJSONEditor<BasicExtension>.getDocJSON: () => NodeJSONReturn a JSON object representing the editor's current document.()
  localStoragevar localStorage: Storage[MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/localStorage).setItemStorage.setItem(key: string, value: string): voidSets the value of the pair identified by key to value, creating a new key/value pair if none existed for key previously.

Throws a "QuotaExceededError" DOMException exception if the new value couldn't be set. (Setting could fail if, e.g., the user has disabled storage for the site, or if the quota has been exceeded.)

Dispatches a storage event on Window objects holding an equivalent Storage object.

[MDN Reference](https://developer.mozilla.org/docs/Web/API/Storage/setItem)('my-document', JSONvar JSON: JSONAn intrinsic object that provides functions to convert JavaScript values to and from the JavaScript Object Notation (JSON) format..stringifyJSON.stringify(value: any, replacer?: (this: any, key: string, value: any) => any, space?: string | number): string (+1 overload)Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
@paramvalue A JavaScript value, usually an object or array, to be converted.@paramreplacer A function that transforms the results.@paramspace Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.(jsonconst json: NodeJSON))
}, { editorUseExtensionOptions.editor?: Editor<any> | undefinedThe editor to add the extension to. If not provided, it will use the
editor from the nearest `ProseKit` component. })

import { useDocChangefunction useDocChange(handler: (doc: Node) => void, options?: UseExtensionOptions): voidCalls the given handler whenever the editor document changes.
@public } from 'prosekit/solid'

useDocChangefunction useDocChange(handler: (doc: Node) => void, options?: UseExtensionOptions): voidCalls the given handler whenever the editor document changes.
@public(() => {
  // This runs whenever the document changes
  const jsonconst json: NodeJSON = editorconst editor: Editor<BasicExtension>.getDocJSONEditor<BasicExtension>.getDocJSON: () => NodeJSONReturn a JSON object representing the editor's current document.()
  localStoragevar localStorage: Storage[MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/localStorage).setItemStorage.setItem(key: string, value: string): voidSets the value of the pair identified by key to value, creating a new key/value pair if none existed for key previously.

Throws a "QuotaExceededError" DOMException exception if the new value couldn't be set. (Setting could fail if, e.g., the user has disabled storage for the site, or if the quota has been exceeded.)

Dispatches a storage event on Window objects holding an equivalent Storage object.

[MDN Reference](https://developer.mozilla.org/docs/Web/API/Storage/setItem)('my-document', JSONvar JSON: JSONAn intrinsic object that provides functions to convert JavaScript values to and from the JavaScript Object Notation (JSON) format..stringifyJSON.stringify(value: any, replacer?: (this: any, key: string, value: any) => any, space?: string | number): string (+1 overload)Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
@paramvalue A JavaScript value, usually an object or array, to be converted.@paramreplacer A function that transforms the results.@paramspace Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.(jsonconst json: NodeJSON))
}, { editorUseExtensionOptions.editor?: MaybeAccessor<Editor<any>> | undefinedThe editor to add the extension to. If not provided, it will use the
editor from the nearest `ProseKit` component. })

JSON Example

Here’s a complete example of saving and loading content using JSON:

editor-component.tsx
editor.tsx

import 'prosekit/basic/style.css'
import 'prosekit/basic/typography.css'

import type { Editor } from 'prosekit/core'
import {
  ProseKit,
  useDocChange,
} from 'prosekit/react'

export default function EditorComponent({
  editor,
  onDocChange,
}: {
  editor: Editor
  onDocChange: () => void
}) {
  useDocChange(onDocChange, { editor })

  return (
    <ProseKit editor={editor}>
      <div className="relative w-full flex-1 box-border overflow-y-scroll">
        <div ref={editor.mount} className="ProseMirror box-border min-h-full px-[max(4rem,_calc(50%-20rem))] py-8 outline-none outline-0 [&_span[data-mention=user]]:text-blue-500 [&_span[data-mention=tag]]:text-violet-500"></div>
      </div>
    </ProseKit>
  )
}

import 'prosekit/basic/style.css'
import 'prosekit/basic/typography.css'

import { defineBasicExtension } from 'prosekit/basic'
import {
  createEditor,
  type NodeJSON,
} from 'prosekit/core'
import {
  useCallback,
  useMemo,
  useState,
} from 'react'

import EditorComponent from './editor-component'

export default function Editor() {
  const [defaultContent, setDefaultContent] = useState<NodeJSON | undefined>()
  const [records, setRecords] = useState<string[]>([])
  const [hasUnsavedChange, setHasUnsavedChange] = useState(false)
  const [key, setKey] = useState(1)

  // Create a new editor instance whenever `defaultContent` changes
  const editor = useMemo(() => {
    const extension = defineBasicExtension()
    return createEditor({ extension, defaultContent })
  }, [defaultContent])

  // Enable the save button
  const handleDocChange = useCallback(() => setHasUnsavedChange(true), [])

  // Save the current document as a JSON string
  const handleSave = useCallback(() => {
    const record = JSON.stringify(editor.getDocJSON())
    setRecords((records) => [...records, record])
    setHasUnsavedChange(false)
  }, [editor])

  // Load a document from a JSON string
  const handleLoad = useCallback((record: string) => {
    setDefaultContent(JSON.parse(record) as NodeJSON)
    setHasUnsavedChange(false)
    setKey((key) => key + 1)
  }, [])

  return (
    <div className="box-border h-full w-full min-h-36 overflow-y-hidden overflow-x-hidden rounded-md border border-solid border-gray-200 dark:border-gray-700 shadow flex flex-col bg-white dark:bg-gray-950 color-black dark:color-white">
      <button
        onClick={handleSave}
        disabled={!hasUnsavedChange}
        className="m-1 border border-solid bg-white px-2 py-1 text-sm text-black disabled:cursor-not-allowed disabled:text-gray-500"
      >
        {hasUnsavedChange ? 'Save' : 'No changes to save'}
      </button>
      <ul className="border-b border-t border-solid text-sm">
        {records.map((record, index) => (
          <li key={index} className="m-1 flex gap-2">
            <button
              className="border border-solid bg-white px-2 py-1 text-black"
              onClick={() => handleLoad(record)}
            >
              Load
            </button>
            <span className="flex-1 overflow-x-scroll p-2">
              <pre>{record}</pre>
            </span>
          </li>
        ))}
      </ul>
      <EditorComponent
        key={key}
        editor={editor}
        onDocChange={handleDocChange}
      />
    </div>
  )
}

editor-component.svelte
editor.svelte

<script lang="ts">
import 'prosekit/basic/style.css'
import 'prosekit/basic/typography.css'

import type { Editor } from 'prosekit/core'
import {
  ProseKit,
  useDocChange,
} from 'prosekit/svelte'

export let editor: Editor
export let onDocChange: () => void

useDocChange(
  () => {
    onDocChange?.()
  },
  { editor },
)

const mount = (element: HTMLElement) => {
  editor.mount(element)
  return { destroy: () => editor.unmount() }
}
</script>

<ProseKit {editor}>
  <div class="relative w-full flex-1 box-border overflow-y-scroll">
    <div use:mount class="ProseMirror box-border min-h-full px-[max(4rem,_calc(50%-20rem))] py-8 outline-none outline-0 [&_span[data-mention=user]]:text-blue-500 [&_span[data-mention=tag]]:text-violet-500"></div>
  </div>
</ProseKit>

<script lang="ts">
import 'prosekit/basic/style.css'
import 'prosekit/basic/typography.css'

import EditorComponent from './editor-component.svelte'

import { defineBasicExtension } from 'prosekit/basic'
import {
  createEditor,
  type NodeJSON,
} from 'prosekit/core'

let defaultContent: NodeJSON | undefined
let hasUnsavedChange = false
let records: string[] = []
let key = 1

// Create a new editor instance whenever `defaultContent` changes
$: editor = createEditor({ extension: defineBasicExtension(), defaultContent })

// Enable the save button
function handleDocChange() {
  hasUnsavedChange = true
}

// Save the current document as a JSON string
function handleSave() {
  const record = JSON.stringify(editor.getDocJSON())
  records = [...records, record]
  hasUnsavedChange = false
}

// Load a document from a JSON string
function handleLoad(record: string) {
  defaultContent = JSON.parse(record)
  key++
  hasUnsavedChange = false
}
</script>

<div class="box-border h-full w-full min-h-36 overflow-y-hidden overflow-x-hidden rounded-md border border-solid border-gray-200 dark:border-gray-700 shadow flex flex-col bg-white dark:bg-gray-950 color-black dark:color-white">
  <button
    on:click={handleSave}
    disabled={!hasUnsavedChange}
    class="m-1 border border-solid bg-white px-2 py-1 text-sm text-black disabled:cursor-not-allowed disabled:text-gray-500"
  >
    {hasUnsavedChange ? 'Save' : 'No changes to save'}
  </button>
  <ul class="border-b border-t border-solid text-sm">
    {#each records as record}
      <li class="m-1 flex gap-2">
        <button
          class="border border-solid bg-white px-2 py-1 text-black"
          on:click={() => handleLoad(record)}
        >
          Load
        </button>
        <span class="flex-1 overflow-x-scroll p-2">
          <pre>{record}</pre>
        </span>
      </li>
    {/each}
  </ul>
  {#key key}
    <EditorComponent {editor} onDocChange={handleDocChange} />
  {/key}
</div>

editor-component.vue
editor.vue

<script setup lang="ts">
import 'prosekit/basic/style.css'
import 'prosekit/basic/typography.css'

import type { Editor } from 'prosekit/core'
import {
  ProseKit,
  useDocChange,
} from 'prosekit/vue'
import {
  ref,
  watchPostEffect,
} from 'vue'

const props = defineProps<{
  editor: Editor
}>()

const emit = defineEmits<{
  docChange: []
}>()

useDocChange(
  () => {
    emit('docChange')
  },
  { editor: props.editor },
)

const editorRef = ref<HTMLDivElement | null>(null)
watchPostEffect((onCleanup) => {
  const editor = props.editor
  editor.mount(editorRef.value)
  onCleanup(() => editor.unmount())
})
</script>

<template>
  <ProseKit :editor="editor">
    <div class="relative w-full flex-1 box-border overflow-y-scroll">
      <div ref="editorRef" class="ProseMirror box-border min-h-full px-[max(4rem,_calc(50%-20rem))] py-8 outline-none outline-0 [&_span[data-mention=user]]:text-blue-500 [&_span[data-mention=tag]]:text-violet-500" />
    </div>
  </ProseKit>
</template>

<script setup lang="ts">
import 'prosekit/basic/style.css'
import 'prosekit/basic/typography.css'

import { defineBasicExtension } from 'prosekit/basic'
import {
  createEditor,
  type NodeJSON,
} from 'prosekit/core'
import {
  computed,
  ref,
} from 'vue'

import EditorComponent from './editor-component.vue'

const defaultContent = ref<NodeJSON | undefined>()
const records = ref<string[]>([])
const hasUnsavedChange = ref(false)
const key = ref(1)

// Create a new editor instance whenever `defaultContent` changes
const editor = computed(() => {
  const extension = defineBasicExtension()
  return createEditor({ extension, defaultContent: defaultContent.value })
})

// Enable the save button
const handleDocChange = () => (hasUnsavedChange.value = true)

// Save the current document as a JSON string
function handleSave() {
  const record = JSON.stringify(editor.value.getDocJSON())
  records.value.push(record)
  hasUnsavedChange.value = false
}

// Load a document from a JSON string
function handleLoad(record: string) {
  defaultContent.value = JSON.parse(record)
  hasUnsavedChange.value = false
  key.value++
}
</script>

<template>
  <div class="box-border h-full w-full min-h-36 overflow-y-hidden overflow-x-hidden rounded-md border border-solid border-gray-200 dark:border-gray-700 shadow flex flex-col bg-white dark:bg-gray-950 color-black dark:color-white">
    <button
      :disabled="!hasUnsavedChange"
      class="m-1 border border-solid bg-white px-2 py-1 text-sm text-black disabled:cursor-not-allowed disabled:text-gray-500"
      @click="handleSave"
    >
      {{ hasUnsavedChange ? 'Save' : 'No changes to save' }}
    </button>
    <ul class="border-b border-t border-solid text-sm">
      <li
        v-for="(record, index) in records"
        :key="index"
        class="m-1 flex gap-2"
      >
        <button
          class="border border-solid bg-white px-2 py-1 text-black"
          @click="handleLoad(record)"
        >
          Load
        </button>
        <span class="flex-1 overflow-x-scroll p-2">
          <pre>{{ record }}</pre>
        </span>
      </li>
    </ul>
    <EditorComponent
      :key="key"
      :editor="editor"
      @doc-change="handleDocChange"
    />
  </div>
</template>

Working with HTML

HTML is useful when you need to display your content outside the editor or integrate with systems that understand HTML.

Saving Content as HTML

To convert your document to HTML:

// Get the current document as an HTML string
const htmlconst html: string = editorconst editor: Editor<BasicExtension>.getDocHTMLEditor<BasicExtension>.getDocHTML: (options?: getDocHTMLOptions) => stringReturn a HTML string representing the editor's current document.()

// Store the HTML
localStoragevar localStorage: Storage[MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/localStorage).setItemStorage.setItem(key: string, value: string): voidSets the value of the pair identified by key to value, creating a new key/value pair if none existed for key previously.

Throws a "QuotaExceededError" DOMException exception if the new value couldn't be set. (Setting could fail if, e.g., the user has disabled storage for the site, or if the quota has been exceeded.)

Dispatches a storage event on Window objects holding an equivalent Storage object.

[MDN Reference](https://developer.mozilla.org/docs/Web/API/Storage/setItem)('my-document-html', htmlconst html: string)

Loading Content from HTML

To load content from HTML:

// Retrieve stored HTML
const htmlconst html: string = localStoragevar localStorage: Storage[MDN Reference](https://developer.mozilla.org/docs/Web/API/Window/localStorage).getItemStorage.getItem(key: string): string | nullReturns the current value associated with the given key, or null if the given key does not exist.

[MDN Reference](https://developer.mozilla.org/docs/Web/API/Storage/getItem)('my-document-html') || ''

// Create editor with the loaded HTML
const editorconst editor: Editor<BasicExtension> = createEditorcreateEditor<BasicExtension>(options: EditorOptions<BasicExtension>): Editor<BasicExtension>@public({
  extensionEditorOptions<BasicExtension>.extension: BasicExtensionThe extension to use when creating the editor.,
  defaultContentEditorOptions<E extends Extension>.defaultContent?: string | NodeJSON | HTMLElement | undefinedThe starting document to use when creating the editor. It can be a
ProseMirror node JSON object, a HTML string, or a HTML element instance.: htmlconst html: string, // Pass the HTML string
})

HTML Example

Here’s an example of saving and loading content using HTML:

editor-component.tsx
editor.tsx

import 'prosekit/basic/style.css'
import 'prosekit/basic/typography.css'

import type { Editor } from 'prosekit/core'
import {
  ProseKit,
  useDocChange,
} from 'prosekit/react'

export default function EditorComponent({
  editor,
  onDocChange,
}: {
  editor: Editor
  onDocChange: () => void
}) {
  useDocChange(onDocChange, { editor })

  return (
    <ProseKit editor={editor}>
      <div className="relative w-full flex-1 box-border overflow-y-scroll">
        <div ref={editor.mount} className="ProseMirror box-border min-h-full px-[max(4rem,_calc(50%-20rem))] py-8 outline-none outline-0 [&_span[data-mention=user]]:text-blue-500 [&_span[data-mention=tag]]:text-violet-500"></div>
      </div>
    </ProseKit>
  )
}

import 'prosekit/basic/style.css'
import 'prosekit/basic/typography.css'

import { defineBasicExtension } from 'prosekit/basic'
import {
  createEditor,
  jsonFromHTML,
  type NodeJSON,
} from 'prosekit/core'
import {
  useCallback,
  useMemo,
  useState,
} from 'react'

import EditorComponent from './editor-component'

export default function Editor() {
  const [defaultContent, setDefaultContent] = useState<NodeJSON | undefined>()
  const [records, setRecords] = useState<string[]>([])
  const [hasUnsavedChange, setHasUnsavedChange] = useState(false)
  const [key, setKey] = useState(1)

  // Create a new editor instance whenever `defaultContent` changes
  const editor = useMemo(() => {
    const extension = defineBasicExtension()
    return createEditor({ extension, defaultContent })
  }, [defaultContent])

  // Enable the save button
  const handleDocChange = useCallback(() => setHasUnsavedChange(true), [])

  // Save the current document as a HTML string
  const handleSave = useCallback(() => {
    const record = editor.getDocHTML()
    setRecords((records) => [...records, record])
    setHasUnsavedChange(false)
  }, [editor])

  // Load a document from a HTML string
  const handleLoad = useCallback(
    (record: string) => {
      setDefaultContent(jsonFromHTML(record, { schema: editor.schema }))
      setHasUnsavedChange(false)
      setKey((key) => key + 1)
    },
    [editor.schema],
  )

  return (
    <div className="box-border h-full w-full min-h-36 overflow-y-hidden overflow-x-hidden rounded-md border border-solid border-gray-200 dark:border-gray-700 shadow flex flex-col bg-white dark:bg-gray-950 color-black dark:color-white">
      <button
        onClick={handleSave}
        disabled={!hasUnsavedChange}
        className="m-1 border border-solid bg-white px-2 py-1 text-sm text-black disabled:cursor-not-allowed disabled:text-gray-500"
      >
        {hasUnsavedChange ? 'Save' : 'No changes to save'}
      </button>
      <ul className="border-b border-t border-solid text-sm">
        {records.map((record, index) => (
          <li key={index} className="m-1 flex gap-2">
            <button
              className="border border-solid bg-white px-2 py-1 text-black"
              onClick={() => handleLoad(record)}
            >
              Load
            </button>
            <span className="flex-1 overflow-x-scroll p-2">
              <pre>{record}</pre>
            </span>
          </li>
        ))}
      </ul>
      <EditorComponent
        key={key}
        editor={editor}
        onDocChange={handleDocChange}
      />
    </div>
  )
}

editor-component.vue
editor.vue

<script setup lang="ts">
import 'prosekit/basic/style.css'
import 'prosekit/basic/typography.css'

import type { Editor } from 'prosekit/core'
import {
  ProseKit,
  useDocChange,
} from 'prosekit/vue'
import {
  ref,
  watchPostEffect,
} from 'vue'

const props = defineProps<{
  editor: Editor
}>()

const emit = defineEmits<{
  docChange: []
}>()

useDocChange(
  () => {
    emit('docChange')
  },
  { editor: props.editor },
)

const editorRef = ref<HTMLDivElement | null>(null)
watchPostEffect((onCleanup) => {
  const editor = props.editor
  editor.mount(editorRef.value)
  onCleanup(() => editor.unmount())
})
</script>

<template>
  <ProseKit :editor="editor">
    <div class="relative w-full flex-1 box-border overflow-y-scroll">
      <div ref="editorRef" class="ProseMirror box-border min-h-full px-[max(4rem,_calc(50%-20rem))] py-8 outline-none outline-0 [&_span[data-mention=user]]:text-blue-500 [&_span[data-mention=tag]]:text-violet-500" />
    </div>
  </ProseKit>
</template>

<script setup lang="ts">
import 'prosekit/basic/style.css'
import 'prosekit/basic/typography.css'

import { defineBasicExtension } from 'prosekit/basic'
import {
  createEditor,
  jsonFromHTML,
  type NodeJSON,
} from 'prosekit/core'
import {
  computed,
  ref,
} from 'vue'

import EditorComponent from './editor-component.vue'

const defaultContent = ref<NodeJSON | undefined>()
const records = ref<string[]>([])
const hasUnsavedChange = ref(false)
const key = ref(1)

// Create a new editor instance whenever `defaultContent` changes
const editor = computed(() => {
  const extension = defineBasicExtension()
  return createEditor({ extension, defaultContent: defaultContent.value })
})

// Enable the save button
const handleDocChange = () => (hasUnsavedChange.value = true)

// Save the current document as a HTML string
function handleSave() {
  const record = editor.value.getDocHTML()
  records.value.push(record)
  hasUnsavedChange.value = false
}

// Load a document from a HTML string
function handleLoad(record: string) {
  defaultContent.value = jsonFromHTML(record, { schema: editor.value.schema })
  hasUnsavedChange.value = false
  key.value++
}
</script>

<template>
  <div class="box-border h-full w-full min-h-36 overflow-y-hidden overflow-x-hidden rounded-md border border-solid border-gray-200 dark:border-gray-700 shadow flex flex-col bg-white dark:bg-gray-950 color-black dark:color-white">
    <button
      :disabled="!hasUnsavedChange"
      class="m-1 border border-solid bg-white px-2 py-1 text-sm text-black disabled:cursor-not-allowed disabled:text-gray-500"
      @click="handleSave"
    >
      {{ hasUnsavedChange ? 'Save' : 'No changes to save' }}
    </button>
    <ul class="border-b border-t border-solid text-sm">
      <li
        v-for="(record, index) in records"
        :key="index"
        class="m-1 flex gap-2"
      >
        <button
          class="border border-solid bg-white px-2 py-1 text-black"
          @click="handleLoad(record)"
        >
          Load
        </button>
        <span class="flex-1 overflow-x-scroll p-2">
          <pre>{{ record }}</pre>
        </span>
      </li>
    </ul>
    <EditorComponent
      :key="key"
      :editor="editor"
      @doc-change="handleDocChange"
    />
  </div>
</template>

Working with Markdown

While ProseKit doesn’t directly support Markdown as a storage format, you can add Markdown support using additional libraries.

Markdown Example

Here’s an example of using Markdown for saving and loading. It uses the remark and rehype libraries to convert between Markdown and HTML.

import 'prosekit/basic/style.css'
import 'prosekit/basic/typography.css'

import type { Editor } from 'prosekit/core'
import {
  ProseKit,
  useDocChange,
} from 'prosekit/react'

export default function EditorComponent({
  editor,
  onDocChange,
}: {
  editor: Editor
  onDocChange: () => void
}) {
  useDocChange(onDocChange, { editor })

  return (
    <ProseKit editor={editor}>
      <div className="relative w-full flex-1 box-border overflow-y-scroll">
        <div ref={editor.mount} className="ProseMirror box-border min-h-full px-[max(4rem,_calc(50%-20rem))] py-8 outline-none outline-0 [&_span[data-mention=user]]:text-blue-500 [&_span[data-mention=tag]]:text-violet-500"></div>
      </div>
    </ProseKit>
  )
}

import 'prosekit/basic/style.css'
import 'prosekit/basic/typography.css'

import { defineBasicExtension } from 'prosekit/basic'
import {
  createEditor,
  jsonFromHTML,
  type NodeJSON,
} from 'prosekit/core'
import {
  useCallback,
  useMemo,
  useState,
} from 'react'

import EditorComponent from './editor-component'
import {
  htmlFromMarkdown,
  markdownFromHTML,
} from './markdown'

export default function Editor() {
  const [defaultContent, setDefaultContent] = useState<NodeJSON | undefined>()
  const [records, setRecords] = useState<string[]>([])
  const [hasUnsavedChange, setHasUnsavedChange] = useState(false)
  const [key, setKey] = useState(1)

  // Create a new editor instance whenever `defaultContent` changes
  const editor = useMemo(() => {
    const extension = defineBasicExtension()
    return createEditor({ extension, defaultContent })
  }, [defaultContent])

  // Enable the save button
  const handleDocChange = useCallback(() => setHasUnsavedChange(true), [])

  // Save the current document as a Markdown string
  const handleSave = useCallback(() => {
    const html = editor.getDocHTML()
    const record = markdownFromHTML(html)
    setRecords((records) => [...records, record])
    setHasUnsavedChange(false)
  }, [editor])

  // Load a document from a Markdown string
  const handleLoad = useCallback(
    (record: string) => {
      const html = htmlFromMarkdown(record)
      setDefaultContent(jsonFromHTML(html, { schema: editor.schema }))
      setHasUnsavedChange(false)
      setKey((key) => key + 1)
    },
    [editor.schema],
  )

  return (
    <div className="box-border h-full w-full min-h-36 overflow-y-hidden overflow-x-hidden rounded-md border border-solid border-gray-200 dark:border-gray-700 shadow flex flex-col bg-white dark:bg-gray-950 color-black dark:color-white">
      <button
        onClick={handleSave}
        disabled={!hasUnsavedChange}
        className="m-1 border border-solid bg-white px-2 py-1 text-sm text-black disabled:cursor-not-allowed disabled:text-gray-500"
      >
        {hasUnsavedChange ? 'Save' : 'No changes to save'}
      </button>
      <ul className="border-b border-t border-solid text-sm">
        {records.map((record, index) => (
          <li key={index} className="m-1 flex gap-2">
            <button
              className="border border-solid bg-white px-2 py-1 text-black"
              onClick={() => handleLoad(record)}
            >
              Load
            </button>
            <span className="flex-1 overflow-x-scroll p-2">
              <pre>{record}</pre>
            </span>
          </li>
        ))}
      </ul>
      <EditorComponent
        key={key}
        editor={editor}
        onDocChange={handleDocChange}
      />
    </div>
  )
}

import rehypeParse from 'rehype-parse'
import rehypeRemark from 'rehype-remark'
import remarkHtml from 'remark-html'
import remarkParse from 'remark-parse'
import remarkStringify from 'remark-stringify'
import { unified } from 'unified'

export function markdownFromHTML(html: string): string {
  return unified()
    .use(rehypeParse)
    .use(rehypeRemark)
    .use(remarkStringify)
    .processSync(html)
    .toString()
}

export function htmlFromMarkdown(markdown: string): string {
  return unified()
    .use(remarkParse)
    .use(remarkHtml)
    .processSync(markdown)
    .toString()
}

<script setup lang="ts">
import 'prosekit/basic/style.css'
import 'prosekit/basic/typography.css'

import type { Editor } from 'prosekit/core'
import {
  ProseKit,
  useDocChange,
} from 'prosekit/vue'
import {
  ref,
  watchPostEffect,
} from 'vue'

const props = defineProps<{
  editor: Editor
}>()

const emit = defineEmits<{
  docChange: []
}>()

useDocChange(
  () => {
    emit('docChange')
  },
  { editor: props.editor },
)

const editorRef = ref<HTMLDivElement | null>(null)
watchPostEffect((onCleanup) => {
  const editor = props.editor
  editor.mount(editorRef.value)
  onCleanup(() => editor.unmount())
})
</script>

<template>
  <ProseKit :editor="editor">
    <div class="relative w-full flex-1 box-border overflow-y-scroll">
      <div ref="editorRef" class="ProseMirror box-border min-h-full px-[max(4rem,_calc(50%-20rem))] py-8 outline-none outline-0 [&_span[data-mention=user]]:text-blue-500 [&_span[data-mention=tag]]:text-violet-500" />
    </div>
  </ProseKit>
</template>

<script setup lang="ts">
import 'prosekit/basic/style.css'
import 'prosekit/basic/typography.css'

import { defineBasicExtension } from 'prosekit/basic'
import {
  createEditor,
  jsonFromHTML,
  type NodeJSON,
} from 'prosekit/core'
import {
  computed,
  ref,
} from 'vue'

import EditorComponent from './editor-component.vue'
import {
  htmlFromMarkdown,
  markdownFromHTML,
} from './markdown'

const defaultContent = ref<NodeJSON | undefined>()
const records = ref<string[]>([])
const hasUnsavedChange = ref(false)
const key = ref(1)

// Create a new editor instance whenever `defaultContent` changes
const editor = computed(() => {
  const extension = defineBasicExtension()
  return createEditor({ extension, defaultContent: defaultContent.value })
})

// Enable the save button
const handleDocChange = () => (hasUnsavedChange.value = true)

// Save the current document as a Markdown string
function handleSave() {
  const html = editor.value.getDocHTML()
  const record = markdownFromHTML(html)
  records.value.push(record)
  hasUnsavedChange.value = false
}

// Load a document from a Markdown string
function handleLoad(record: string) {
  const html = htmlFromMarkdown(record)
  defaultContent.value = jsonFromHTML(html, { schema: editor.value.schema })
  hasUnsavedChange.value = false
  key.value++
}
</script>

<template>
  <div class="box-border h-full w-full min-h-36 overflow-y-hidden overflow-x-hidden rounded-md border border-solid border-gray-200 dark:border-gray-700 shadow flex flex-col bg-white dark:bg-gray-950 color-black dark:color-white">
    <button
      :disabled="!hasUnsavedChange"
      class="m-1 border border-solid bg-white px-2 py-1 text-sm text-black disabled:cursor-not-allowed disabled:text-gray-500"
      @click="handleSave"
    >
      {{ hasUnsavedChange ? 'Save' : 'No changes to save' }}
    </button>
    <ul class="border-b border-t border-solid text-sm">
      <li
        v-for="(record, index) in records"
        :key="index"
        class="m-1 flex gap-2"
      >
        <button
          class="border border-solid bg-white px-2 py-1 text-black"
          @click="handleLoad(record)"
        >
          Load
        </button>
        <span class="flex-1 overflow-x-scroll p-2">
          <pre>{{ record }}</pre>
        </span>
      </li>
    </ul>
    <EditorComponent
      :key="key"
      :editor="editor"
      @doc-change="handleDocChange"
    />
  </div>
</template>

import rehypeParse from 'rehype-parse'
import rehypeRemark from 'rehype-remark'
import remarkHtml from 'remark-html'
import remarkParse from 'remark-parse'
import remarkStringify from 'remark-stringify'
import { unified } from 'unified'

export function markdownFromHTML(html: string): string {
  return unified()
    .use(rehypeParse)
    .use(rehypeRemark)
    .use(remarkStringify)
    .processSync(html)
    .toString()
}

export function htmlFromMarkdown(markdown: string): string {
  return unified()
    .use(remarkParse)
    .use(remarkHtml)
    .processSync(markdown)
    .toString()
}

Conversion Utilities

ProseKit provides utility functions for converting between plain JSON object, HTML string, and ProseMirrorNode.