CoTexts

Jazz provides two CoValue types for collaborative text editing, collectively referred to as "CoText" values:

co.plainText() for simple text editing without formatting
co.richText() for rich text with HTML-based formatting (extends co.plainText())

Both types enable real-time collaborative editing of text content while maintaining consistency across multiple users.

Note: If you're looking for a quick way to add rich text editing to your app, check out jazz-richtext-prosemirror.

const const note: CoPlainTextnote = import coco.function plainText(): PlainTextSchema
export plainTextplainText().function create(text: string, options?: {
    owner: Account | Group;
} | Account | Group): CoPlainTextcreate("Meeting notes", { owner: Account | Groupowner: const me: Account | ({
    [x: string]: any;
} & Account)me });

// Update the text
const note: CoPlainTextnote.CoPlainText.applyDiff(other: string): voidApply text, modifying the text in place. Calculates the diff and applies it to the CoValue.
@categoryMutationapplyDiff("Meeting notes for Tuesday");

var console: ConsoleThe `console` module provides a simple debugging console that is similar to the
JavaScript console mechanism provided by web browsers.

The module exports two specific components:

* A `Console` class with methods such as `console.log()`, `console.error()` and `console.warn()` that can be used to write to any Node.js stream.
* A global `console` instance configured to write to [`process.stdout`](https://nodejs.org/docs/latest-v20.x/api/process.html#processstdout) and
[`process.stderr`](https://nodejs.org/docs/latest-v20.x/api/process.html#processstderr). The global `console` can be used without importing the `node:console` module.

_**Warning**_: The global console object's methods are neither consistently
synchronous like the browser APIs they resemble, nor are they consistently
asynchronous like all other Node.js streams. See the [`note on process I/O`](https://nodejs.org/docs/latest-v20.x/api/process.html#a-note-on-process-io) for
more information.

Example using the global `console`:

```js
console.log('hello world');
// Prints: hello world, to stdout
console.log('hello %s', 'world');
// Prints: hello world, to stdout
console.error(new Error('Whoops, something bad happened'));
// Prints error message and stack trace to stderr:
//   Error: Whoops, something bad happened
//     at [eval]:5:15
//     at Script.runInThisContext (node:vm:132:18)
//     at Object.runInThisContext (node:vm:309:38)
//     at node:internal/process/execution:77:19
//     at [eval]-wrapper:6:22
//     at evalScript (node:internal/process/execution:76:60)
//     at node:internal/main/eval_string:23:3

const name = 'Will Robinson';
console.warn(`Danger ${name}! Danger!`);
// Prints: Danger Will Robinson! Danger!, to stderr
```

Example using the `Console` class:

```js
const out = getStreamSomehow();
const err = getStreamSomehow();
const myConsole = new console.Console(out, err);

myConsole.log('hello world');
// Prints: hello world, to out
myConsole.log('hello %s', 'world');
// Prints: hello world, to out
myConsole.error(new Error('Whoops, something bad happened'));
// Prints: [Error: Whoops, something bad happened], to err

const name = 'Will Robinson';
myConsole.warn(`Danger ${name}! Danger!`);
// Prints: Danger Will Robinson! Danger!, to err
```
@see[source](https://github.com/nodejs/node/blob/v20.11.1/lib/console.js)console.Console.log(message?: any, ...optionalParams: any[]): void (+1 overload)Prints to `stdout` with newline. Multiple arguments can be passed, with the
first used as the primary message and all additional used as substitution
values similar to [`printf(3)`](http://man7.org/linux/man-pages/man3/printf.3.html)
(the arguments are all passed to [`util.format()`](https://nodejs.org/docs/latest-v20.x/api/util.html#utilformatformat-args)).

```js
const count = 5;
console.log('count: %d', count);
// Prints: count: 5, to stdout
console.log('count:', count);
// Prints: count: 5, to stdout
```

See [`util.format()`](https://nodejs.org/docs/latest-v20.x/api/util.html#utilformatformat-args) for more information.
@sincev0.1.100log(const note: CoPlainTextnote.CoPlainText.toString(): stringReturns a string representation of a string.toString());  // "Meeting notes for Tuesday"

For a full example of CoTexts in action, see our Richtext example app, which shows plain text and rich text editing.

`co.plainText()` vs `z.string()`

While z.string() is perfect for simple text fields, co.plainText() is the right choice when you need:

Frequent text edits that aren't just replacing the whole field
Fine-grained control over text edits (inserting, deleting at specific positions)
Multiple users editing the same text simultaneously
Character-by-character collaboration
Efficient merging of concurrent changes

Both support real-time updates, but co.plainText() provides specialized tools for collaborative editing scenarios.

Creating CoText Values

CoText values are typically used as fields in your schemas:

const const Profile: CoProfileSchema<{
    name: z.z.ZodString;
    bio: PlainTextSchema;
    description: RichTextSchema;
}>Profile = import coco.profile<{
    name: z.z.ZodString;
    bio: PlainTextSchema;
    description: RichTextSchema;
}>(shape?: ({
    name: z.z.ZodString;
    bio: PlainTextSchema;
    description: RichTextSchema;
} & {
    ...;
}) | undefined): CoProfileSchema<...>
export profileprofile({
  name: z.z.ZodString & z.z.core.$ZodString<string>name: import zz.function string(params?: string | z.z.core.$ZodStringParams): z.z.ZodString
export stringstring(),
  bio: PlainTextSchemabio: import coco.function plainText(): PlainTextSchema
export plainTextplainText(),         // Plain text field
  description: RichTextSchemadescription: import coco.function richText(): RichTextSchema
export richTextrichText(),  // Rich text with formatting
});

Create a CoText value with a simple string:

// Create plaintext with default ownership (current user)
const const note: CoPlainTextnote = import coco.function plainText(): PlainTextSchema
export plainTextplainText().function create(text: string, options?: {
    owner: Account | Group;
} | Account | Group): CoPlainTextcreate("Meeting notes", { owner: Account | Groupowner: const me: Account | ({
    [x: string]: any;
} & Account)me });

// Create rich text with HTML content
const const document: CoRichTextdocument = import coco.function richText(): RichTextSchema
export richTextrichText().function create(text: string, options?: {
    owner: Account | Group;
} | Account | Group): CoRichTextcreate("<p>Project <strong>overview</strong></p>",
  { owner: Account | Groupowner: const me: Account | ({
    [x: string]: any;
} & Account)me }
);

Ownership

Like other CoValues, you can specify ownership when creating CoTexts.

// Create with shared ownership
const const teamGroup: GroupteamGroup = class Group@categoryIdentity & PermissionsGroup.Group.create<Group>(this: CoValueClass<Group>, options?: {
    owner: Account;
} | Account): Groupcreate();
const teamGroup: GroupteamGroup.Group.addMember(member: Account, role: AccountRole): void (+1 overload)addMember(const colleagueAccount: Account | ({
    [x: string]: any;
} & Account)colleagueAccount, "writer");

const const teamNote: CoPlainTextteamNote = import coco.function plainText(): PlainTextSchema
export plainTextplainText().function create(text: string, options?: {
    owner: Account | Group;
} | Account | Group): CoPlainTextcreate("Team updates", { owner: Group | Accountowner: const teamGroup: GroupteamGroup });

See Groups as permission scopes for more information on how to use groups to control access to CoText values.

Reading Text

CoText values work similarly to JavaScript strings:

// Get the text content
var console: ConsoleThe `console` module provides a simple debugging console that is similar to the
JavaScript console mechanism provided by web browsers.

The module exports two specific components:

* A `Console` class with methods such as `console.log()`, `console.error()` and `console.warn()` that can be used to write to any Node.js stream.
* A global `console` instance configured to write to [`process.stdout`](https://nodejs.org/docs/latest-v20.x/api/process.html#processstdout) and
[`process.stderr`](https://nodejs.org/docs/latest-v20.x/api/process.html#processstderr). The global `console` can be used without importing the `node:console` module.

_**Warning**_: The global console object's methods are neither consistently
synchronous like the browser APIs they resemble, nor are they consistently
asynchronous like all other Node.js streams. See the [`note on process I/O`](https://nodejs.org/docs/latest-v20.x/api/process.html#a-note-on-process-io) for
more information.

Example using the global `console`:

```js
console.log('hello world');
// Prints: hello world, to stdout
console.log('hello %s', 'world');
// Prints: hello world, to stdout
console.error(new Error('Whoops, something bad happened'));
// Prints error message and stack trace to stderr:
//   Error: Whoops, something bad happened
//     at [eval]:5:15
//     at Script.runInThisContext (node:vm:132:18)
//     at Object.runInThisContext (node:vm:309:38)
//     at node:internal/process/execution:77:19
//     at [eval]-wrapper:6:22
//     at evalScript (node:internal/process/execution:76:60)
//     at node:internal/main/eval_string:23:3

const name = 'Will Robinson';
console.warn(`Danger ${name}! Danger!`);
// Prints: Danger Will Robinson! Danger!, to stderr
```

Example using the `Console` class:

```js
const out = getStreamSomehow();
const err = getStreamSomehow();
const myConsole = new console.Console(out, err);

myConsole.log('hello world');
// Prints: hello world, to out
myConsole.log('hello %s', 'world');
// Prints: hello world, to out
myConsole.error(new Error('Whoops, something bad happened'));
// Prints: [Error: Whoops, something bad happened], to err

const name = 'Will Robinson';
myConsole.warn(`Danger ${name}! Danger!`);
// Prints: Danger Will Robinson! Danger!, to err
```
@see[source](https://github.com/nodejs/node/blob/v20.11.1/lib/console.js)console.Console.log(message?: any, ...optionalParams: any[]): void (+1 overload)Prints to `stdout` with newline. Multiple arguments can be passed, with the
first used as the primary message and all additional used as substitution
values similar to [`printf(3)`](http://man7.org/linux/man-pages/man3/printf.3.html)
(the arguments are all passed to [`util.format()`](https://nodejs.org/docs/latest-v20.x/api/util.html#utilformatformat-args)).

```js
const count = 5;
console.log('count: %d', count);
// Prints: count: 5, to stdout
console.log('count:', count);
// Prints: count: 5, to stdout
```

See [`util.format()`](https://nodejs.org/docs/latest-v20.x/api/util.html#utilformatformat-args) for more information.
@sincev0.1.100log(const note: CoPlainTextnote.CoPlainText.toString(): stringReturns a string representation of a string.toString());  // "Meeting notes"
var console: ConsoleThe `console` module provides a simple debugging console that is similar to the
JavaScript console mechanism provided by web browsers.

The module exports two specific components:

* A `Console` class with methods such as `console.log()`, `console.error()` and `console.warn()` that can be used to write to any Node.js stream.
* A global `console` instance configured to write to [`process.stdout`](https://nodejs.org/docs/latest-v20.x/api/process.html#processstdout) and
[`process.stderr`](https://nodejs.org/docs/latest-v20.x/api/process.html#processstderr). The global `console` can be used without importing the `node:console` module.

_**Warning**_: The global console object's methods are neither consistently
synchronous like the browser APIs they resemble, nor are they consistently
asynchronous like all other Node.js streams. See the [`note on process I/O`](https://nodejs.org/docs/latest-v20.x/api/process.html#a-note-on-process-io) for
more information.

Example using the global `console`:

```js
console.log('hello world');
// Prints: hello world, to stdout
console.log('hello %s', 'world');
// Prints: hello world, to stdout
console.error(new Error('Whoops, something bad happened'));
// Prints error message and stack trace to stderr:
//   Error: Whoops, something bad happened
//     at [eval]:5:15
//     at Script.runInThisContext (node:vm:132:18)
//     at Object.runInThisContext (node:vm:309:38)
//     at node:internal/process/execution:77:19
//     at [eval]-wrapper:6:22
//     at evalScript (node:internal/process/execution:76:60)
//     at node:internal/main/eval_string:23:3

const name = 'Will Robinson';
console.warn(`Danger ${name}! Danger!`);
// Prints: Danger Will Robinson! Danger!, to stderr
```

Example using the `Console` class:

```js
const out = getStreamSomehow();
const err = getStreamSomehow();
const myConsole = new console.Console(out, err);

myConsole.log('hello world');
// Prints: hello world, to out
myConsole.log('hello %s', 'world');
// Prints: hello world, to out
myConsole.error(new Error('Whoops, something bad happened'));
// Prints: [Error: Whoops, something bad happened], to err

const name = 'Will Robinson';
myConsole.warn(`Danger ${name}! Danger!`);
// Prints: Danger Will Robinson! Danger!, to err
```
@see[source](https://github.com/nodejs/node/blob/v20.11.1/lib/console.js)console.Console.log(message?: any, ...optionalParams: any[]): void (+1 overload)Prints to `stdout` with newline. Multiple arguments can be passed, with the
first used as the primary message and all additional used as substitution
values similar to [`printf(3)`](http://man7.org/linux/man-pages/man3/printf.3.html)
(the arguments are all passed to [`util.format()`](https://nodejs.org/docs/latest-v20.x/api/util.html#utilformatformat-args)).

```js
const count = 5;
console.log('count: %d', count);
// Prints: count: 5, to stdout
console.log('count:', count);
// Prints: count: 5, to stdout
```

See [`util.format()`](https://nodejs.org/docs/latest-v20.x/api/util.html#utilformatformat-args) for more information.
@sincev0.1.100log(`${const note: CoPlainTextnote}`);    // "Meeting notes"

// Check the text length
var console: ConsoleThe `console` module provides a simple debugging console that is similar to the
JavaScript console mechanism provided by web browsers.

The module exports two specific components:

* A `Console` class with methods such as `console.log()`, `console.error()` and `console.warn()` that can be used to write to any Node.js stream.
* A global `console` instance configured to write to [`process.stdout`](https://nodejs.org/docs/latest-v20.x/api/process.html#processstdout) and
[`process.stderr`](https://nodejs.org/docs/latest-v20.x/api/process.html#processstderr). The global `console` can be used without importing the `node:console` module.

_**Warning**_: The global console object's methods are neither consistently
synchronous like the browser APIs they resemble, nor are they consistently
asynchronous like all other Node.js streams. See the [`note on process I/O`](https://nodejs.org/docs/latest-v20.x/api/process.html#a-note-on-process-io) for
more information.

Example using the global `console`:

```js
console.log('hello world');
// Prints: hello world, to stdout
console.log('hello %s', 'world');
// Prints: hello world, to stdout
console.error(new Error('Whoops, something bad happened'));
// Prints error message and stack trace to stderr:
//   Error: Whoops, something bad happened
//     at [eval]:5:15
//     at Script.runInThisContext (node:vm:132:18)
//     at Object.runInThisContext (node:vm:309:38)
//     at node:internal/process/execution:77:19
//     at [eval]-wrapper:6:22
//     at evalScript (node:internal/process/execution:76:60)
//     at node:internal/main/eval_string:23:3

const name = 'Will Robinson';
console.warn(`Danger ${name}! Danger!`);
// Prints: Danger Will Robinson! Danger!, to stderr
```

Example using the `Console` class:

```js
const out = getStreamSomehow();
const err = getStreamSomehow();
const myConsole = new console.Console(out, err);

myConsole.log('hello world');
// Prints: hello world, to out
myConsole.log('hello %s', 'world');
// Prints: hello world, to out
myConsole.error(new Error('Whoops, something bad happened'));
// Prints: [Error: Whoops, something bad happened], to err

const name = 'Will Robinson';
myConsole.warn(`Danger ${name}! Danger!`);
// Prints: Danger Will Robinson! Danger!, to err
```
@see[source](https://github.com/nodejs/node/blob/v20.11.1/lib/console.js)console.Console.log(message?: any, ...optionalParams: any[]): void (+1 overload)Prints to `stdout` with newline. Multiple arguments can be passed, with the
first used as the primary message and all additional used as substitution
values similar to [`printf(3)`](http://man7.org/linux/man-pages/man3/printf.3.html)
(the arguments are all passed to [`util.format()`](https://nodejs.org/docs/latest-v20.x/api/util.html#utilformatformat-args)).

```js
const count = 5;
console.log('count: %d', count);
// Prints: count: 5, to stdout
console.log('count:', count);
// Prints: count: 5, to stdout
```

See [`util.format()`](https://nodejs.org/docs/latest-v20.x/api/util.html#utilformatformat-args) for more information.
@sincev0.1.100log(const note: CoPlainTextnote.CoPlainText.length: numberReturns the length of a String object.length);      // 14

Making Edits

Insert and delete text with intuitive methods:

// Insert text at a specific position
const note: CoPlainTextnote.CoPlainText.insertBefore(idx: number, text: string): voidinsertBefore(8, "weekly ");  // "Meeting weekly notes"

// Insert after a position
const note: CoPlainTextnote.CoPlainText.insertAfter(idx: number, text: string): voidinsertAfter(21, " for Monday");  // "Meeting weekly notes for Monday"

// Delete a range of text
const note: CoPlainTextnote.CoPlainText.deleteRange(range: {
    from: number;
    to: number;
}): voiddeleteRange({ from: numberfrom: 8, to: numberto: 15 });  // "Meeting notes for Monday"

// Apply a diff to update the entire text
const note: CoPlainTextnote.CoPlainText.applyDiff(other: string): voidApply text, modifying the text in place. Calculates the diff and applies it to the CoValue.
@categoryMutationapplyDiff("Team meeting notes for Tuesday");

Applying Diffs

Use applyDiff to efficiently update text with minimal changes:

// Original text: "Team status update"
const const minutes: CoPlainTextminutes = import coco.function plainText(): PlainTextSchema
export plainTextplainText().function create(text: string, options?: {
    owner: Account | Group;
} | Account | Group): CoPlainTextcreate("Team status update", { owner: Account | Groupowner: const me: Account | ({
    [x: string]: any;
} & Account)me });

// Replace the entire text with a new version
const minutes: CoPlainTextminutes.CoPlainText.applyDiff(other: string): voidApply text, modifying the text in place. Calculates the diff and applies it to the CoValue.
@categoryMutationapplyDiff("Weekly team status update for Project X");

// Make partial changes
let let text: stringtext = const minutes: CoPlainTextminutes.CoPlainText.toString(): stringReturns a string representation of a string.toString();
let text: stringtext = let text: stringtext.String.replace(searchValue: string | RegExp, replaceValue: string): string (+3 overloads)Replaces text in a string, using a regular expression or search string.
@paramsearchValue A string or regular expression to search for.@paramreplaceValue A string containing the text to replace. When the {@linkcode searchValue} is a `RegExp`, all matches are replaced if the `g` flag is set (or only those matches at the beginning, if the `y` flag is also present). Otherwise, only the first match of {@linkcode searchValue} is replaced.replace("Weekly", "Monday");
const minutes: CoPlainTextminutes.CoPlainText.applyDiff(other: string): voidApply text, modifying the text in place. Calculates the diff and applies it to the CoValue.
@categoryMutationapplyDiff(let text: stringtext);  // Efficiently updates only what changed

Perfect for handling user input in form controls:

<script lang="ts">
import { co } from "jazz-tools";
import { createJazzTestAccount } from 'jazz-tools/testing';
const me = await createJazzTestAccount();

const note = co.plainText().create("", { owner: me });
</script>

<textarea
  value={note.toString()}
  oninput={e => note.applyDiff(e.target.value)}
/>

Using Rich Text with ProseMirror

Jazz provides a dedicated plugin for integrating co.richText() with the popular ProseMirror editor. This plugin, jazz-richtext-prosemirror, enables bidirectional synchronization between your co.richText() instances and ProseMirror editors.

ProseMirror Plugin Features

Bidirectional Sync: Changes in the editor automatically update the co.richText() and vice versa
Real-time Collaboration: Multiple users can edit the same document simultaneously
HTML Conversion: Automatically converts between HTML (used by co.richText()) and ProseMirror's document model

Installation

pnpm add jazz-richtext-prosemirror \
  prosemirror-view \
  prosemirror-state \
  prosemirror-schema-basic

Integration

We don't currently have a Svelte-specific example, but you need help you can request one, or ask on Discord.

For use without a framework:

import { co, z } from "jazz-tools";
import { createJazzPlugin } from "jazz-richtext-prosemirror";
import { exampleSetup } from "prosemirror-example-setup";
import { schema } from "prosemirror-schema-basic";
import { EditorState } from "prosemirror-state";
import { EditorView } from "prosemirror-view";

function setupRichTextEditor(coRichText, container) {
  // Create the Jazz plugin for ProseMirror
  // Providing a co.richText() instance to the plugin to automatically sync changes
  const jazzPlugin = createJazzPlugin(coRichText); 

  // Set up ProseMirror with Jazz plugin
  const view = new EditorView(container, {
    state: EditorState.create({
      schema,
      plugins: [
        ...exampleSetup({ schema }),
        jazzPlugin,
      ],
    }),
  });

  // Return cleanup function
  return () => {
    view.destroy();
  };
}

// Usage
const document = co.richText().create("<p>Initial content</p>", { owner: me });
const editorContainer = document.getElementById("editor");
const cleanup = setupRichTextEditor(document, editorContainer);

// Later when done with the editor
cleanup();

Docs issue?⌝Join Discord⌝

CoFeeds

FileStreams

CoTexts

#co.plainText() vs z.string()

#Creating CoText Values

#Ownership

#Reading Text

#Making Edits

#Applying Diffs

#Using Rich Text with ProseMirror

#ProseMirror Plugin Features

#Installation

#Integration