reasons for fork

• render menu inside specific container
• dropdown always below, never above

lexical-beautiful-mentions

A mentions plugin for the lexical editor. lexical is an extendable text editor for the web build by Meta. While the lexical playground offers a basic mentions plugin for demo purposes, this plugin is more advanced and offers the following features:

• Customizable triggers: Use characters, words or regular expressions as triggers for mentions.
• Editing mentions outside the editor: Programmatically insert, delete, or rename mentions via the useBeautifulMentions hook.
• Customizable mention style: You can change the look of the mentions via the editor theme to match the style of your application.
• Automatic spacing: The plugin automatically adds spaces around the mentions, which makes it easier for the user to continue typing.
• Adding new mentions: You can allow users to create new mentions that are not in the suggestion list.
• Flexible way to provide mentions: You can use an async query function or a predefined list to provide mentions for the suggestion list.
• Custom menu and menu item: You can customize the look and behavior of the menu that displays the mention suggestions.
• Additional metadata: You can add additional metadata to the mention items, which will be included in the mention nodes when serializing the editor content.
• Custom mention component: You can replace the default mention component with a custom component of your choice.

Installation

To install the plugin, run the following command:

// with npm
npm install lexical-beautiful-mentions

// with yarn
yarn add lexical-beautiful-mentions

You also need to install the lexical and @lexical/react, which is a peer dependency of this plugin.

Usage

Import the BeautifulMentionsPlugin plugin:

import { BeautifulMentionsPlugin, BeautifulMentionNode } from "lexical-beautiful-mentions";

Add the plugin to the lexical editor:

const mentionItems = {
  "@": ["Anton", "Boris", "Catherine", "Dmitri", "Elena", "Felix", "Gina"],
  "#": ["Apple", "Banana", "Cherry", "Date", "Elderberry", "Fig", "Grape"],
  "due:": ["Today", "Tomorrow", "01-01-2023"],
};

const editorConfig = {
  // ...
  nodes: [BeautifulMentionNode] // 👈 register the mention node
};

return (
  <LexicalComposer initialConfig={editorConfig}>
    {/** ... */}
    <BeautifulMentionsPlugin
      items={mentionItems}
    />
    {/** ... */}
  </LexicalComposer>
);

Customize mention style

import { BeautifulMentionsTheme } from "lexical-beautiful-mentions";
// ...
const beautifulMentionsTheme: BeautifulMentionsTheme = {
  // 👇 use the trigger name as the key
  "@": "px-1 mx-px ...",
  // 👇 add the "Focused" suffix to style the focused mention
  "@Focused": "outline-none shadow-md ...",
  // 👇 use a configuration object if you need to apply different styles to trigger and value
  "due:": {
    trigger: "text-blue-400 ...",
    value: "text-orange-400 ...",
  },
}
const editorConfig = {
  // ...
  theme: {
    // ...
    beautifulMentions: beautifulMentionsTheme,
  },
};

// ...

return (
  <LexicalComposer initialConfig={editorConfig}>
    {/** ... */}
  </LexicalComposer>
);

Custom mention node and component

If applying styles via the theme is not enough, you can replace the BeautifulMentionNode by using the lexical Node Overrides API. This allows you to change the default behavior of the mention node:

export class CustomMentionsNode extends BeautifulMentionNode {
  static getType() {
    return "custom-beautifulMention";
  }
  static clone(node: CustomBeautifulMentionNode) {
    // TODO: implement
  }
  static importJSON(serializedNode: SerializedBeautifulMentionNode) {
    // TODO: implement
  }
  exportJSON(): SerializedBeautifulMentionNode {
    // TODO: implement
  }
  component(): ElementType<BeautifulMentionComponentProps> | null {
    // the component that renders the mention in the editor
    // return null to use the default component
    // 💡 if you only want to replace the component use the `createBeautifulMentionNode` helper method. See below for more details 👇
  }
  decorate(editor: LexicalEditor, config: EditorConfig): React.JSX.Element {
    // TODO: implement
  }
}
const editorConfig = {
  // ...
  nodes: [
    // Don't forget to register your custom node separately!
    CustomMentionsNode,
    {
      replace: BeautifulMentionNode, 
      with: (node: BeautifulMentionNode) => {
        return new CustomMentionsNode(
          node.getTrigger(),
          node.getValue(),
          node.getData(),
        );
      }
    }
  ]
}

The plugin also provides a helper method that overrides the default BeautifulMentionNode and uses a customized version with a component of your choice:

const CustomMentionComponent = forwardRef<
  HTMLDivElement,
  BeautifulMentionComponentProps<MyData>
>(({ trigger, value, data: myData, children, ...other }, ref) => {
  return (
    <div {...other} ref={ref} title={trigger + value}>
      {value}
    </div>
  );
});
const editorConfig = {
  // ...
  nodes: [...createBeautifulMentionNode(CustomMentionComponent)],
};

Custom menu and menu item component

const CustomMenu = forwardRef<
  HTMLElement, 
  BeautifulMentionsMenuProps
>(({ open, loading, ...props }, ref) => (
  <ul
    className="m-0 mt-6 ..."
    {...props}
    ref={ref}
  />
));

const CustomMenuItem = forwardRef<
  HTMLLIElement,
  BeautifulMentionsMenuItemProps
>(({ selected, item, ...props }, ref) => (
  <li
    className={`m-0 flex ... ${selected ? "bg-gray-100 ..." : "bg-white ..."}`}
    {...props}
    ref={ref}
  />
));

// ...

<BeautifulMentionsPlugin
  items={mentionItems}
  menuComponent={CustomMenu}
  menuItemComponent={CustomMenuItem}
/>

Additional metadata

Additional metadata can be used to uniquely identify mentions by adding an id or any other unique property to the mention items. When serializing the editor content, the metadata will be included in the mention nodes:

const mentionItems = {
  "@": [
    { value: "Catherine", id: "1", email: "[email protected]" },
    { value: "Catherine", id: "2", email: "[email protected]" },
    // ...
  ],
};
// serializes to the following lexical nodes:
// [
//   {
//     "trigger": "@",
//     "value": "Catherine",
//     "data": {
//       "id": "1",
//       "email": "[email protected]"
//     },
//     "type": "beautifulMention",
//     "version": 1
//   },
//   {
//     "trigger": "@",
//     "value": "Catherine",
//     "data": {
//       "id": "2",
//       "email": "[email protected]"
//     },
//     "type": "beautifulMention",
//     "version": 1
//   }
// ]

All additional metadata are available as props of the BeautifulMentionsMenuItem component:

const CustomMenuItem = forwardRef<
  HTMLLIElement,
  BeautifulMentionsMenuItemProps
>(({ item: { data: { id, email }}, ...props }, ref) => (
 <li
  // ...
 />
));

Programmatically insert, delete, or rename mentions

import {
  BeautifulMentionsPlugin,
  useBeautifulMentions,
} from "lexical-beautiful-mentions";

// ...

function MentionsToolbar() {
  const { removeMentions, insertMention } = useBeautifulMentions();
  return (
    <div className="grid gap-2 grid-cols-2">
      <Button onClick={() => removeMentions({ trigger: "#", value: "urgent" })}>
        Remove Mention
      </Button>
      <Button onClick={() => insertMention({ trigger: "#", value: "work" })}>
        Insert Mention
      </Button>
    </div>
  );
}

// ...

return (
  <LexicalComposer>
    {/** ... */}
    <BeautifulMentionsPlugin
      items={mentionItems}
    />
    <MentionsToolbar />
    {/** ... */}
  </LexicalComposer>
);

Async query function

const queryMentions = async (trigger: string, query: string) => {
  const response = await fetch(
    `https://example.com/api/mentions?trigger=${trigger}&query=${query}`
  );
  const data = await response.json();
  return data as string[];
};

// ...

return (
  <LexicalComposer>
    {/** ... */}
    <BeautifulMentionsPlugin
      triggers={["@", "#"]} // needed to tell the plugin when to call the query function
      onSearch={queryMentions}
    />
    {/** ... */}
  </LexicalComposer>
);