Example: hard-break

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

import { createEditor } from 'prosekit/core'
import { ProseKit } from 'prosekit/solid'

import { defineExtension } from './extension'
import Toolbar from './toolbar'

const defaultContent = `<p>
O’er all the hilltops<br />
Is quiet now,<br />
In all the treetops<br />
Hearest thou<br />
Hardly a breath;<br />
The birds are asleep in the trees:<br />
Wait, soon like these<br />
Thou too shalt rest.<br />
</p>
`

export default function Editor() {
  const editor = createEditor({ extension: defineExtension(), defaultContent })

  return (
    <ProseKit editor={editor}>
      <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">
        <Toolbar />
        <div class="relative w-full flex-1 box-border overflow-y-scroll">
          <div ref={editor.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>
      </div>
    </ProseKit>
  )
}

import {
  defineBaseKeymap,
  union,
} from 'prosekit/core'
import { defineDoc } from 'prosekit/extensions/doc'
import { defineHardBreak } from 'prosekit/extensions/hard-break'
import { defineParagraph } from 'prosekit/extensions/paragraph'
import { defineText } from 'prosekit/extensions/text'

export function defineExtension() {
  return union(
    defineBaseKeymap(),
    defineDoc(),
    defineText(),
    defineParagraph(),
    defineHardBreak(),
  )
}

export type EditorExtension = ReturnType<typeof defineExtension>

import { useEditor } from 'prosekit/solid'

import Button from './button'
import type { EditorExtension } from './extension'

export default function Toolbar() {
  const editor = useEditor<EditorExtension>({ update: true })

  return (
    <div class="z-2 box-border border-gray-200 dark:border-gray-800 border-solid border-l-0 border-r-0 border-t-0 border-b flex flex-wrap gap-1 p-2 items-center">
      <Button
        pressed={() => false}
        disabled={() => !editor().commands.insertHardBreak.canExec()}
        onClick={() => editor().commands.insertHardBreak()}
      >
        Insert Hard Break
      </Button>
    </div>
  )
}

import type { ParentProps } from 'solid-js'

export default function Button({
  pressed,
  disabled,
  onClick,
  children,
}: ParentProps<{
  pressed: () => boolean
  disabled?: () => boolean
  onClick: () => void
}>) {
  return (
    <button
      data-state={pressed() ? 'on' : 'off'}
      disabled={disabled?.()}
      onClick={() => onClick()}
      onMouseDown={(event) => event.preventDefault()}
      class="outline-unset focus-visible:outline-unset flex items-center justify-center rounded-md p-2 font-medium transition focus-visible:ring-2 text-sm focus-visible:ring-gray-900 dark:focus-visible:ring-gray-300 disabled:pointer-events-none min-w-9 min-h-9 disabled:opacity-50 hover:disabled:opacity-50 bg-transparent hover:bg-gray-100 dark:hover:bg-gray-800 data-[state=on]:bg-gray-200 dark:data-[state=on]:bg-gray-700"
    >
      {children}
    </button>
  )
}