Alert Block with Full UX

import { defaultProps } from "@blocknote/core";
import { createReactBlockSpec } from "@blocknote/react";
import { Menu } from "@mantine/core";
import { MdCancel, MdCheckCircle, MdError, MdInfo } from "react-icons/md";

import "./styles.css";

// The types of alerts that users can choose from.
export const alertTypes = [
  {
    title: "Warning",
    value: "warning",
    icon: MdError,
    color: "#e69819",
    backgroundColor: {
      light: "#fff6e6",
      dark: "#805d20",
    },
  },
  {
    title: "Error",
    value: "error",
    icon: MdCancel,
    color: "#d80d0d",
    backgroundColor: {
      light: "#ffe6e6",
      dark: "#802020",
    },
  },
  {
    title: "Info",
    value: "info",
    icon: MdInfo,
    color: "#507aff",
    backgroundColor: {
      light: "#e6ebff",
      dark: "#203380",
    },
  },
  {
    title: "Success",
    value: "success",
    icon: MdCheckCircle,
    color: "#0bc10b",
    backgroundColor: {
      light: "#e6ffe6",
      dark: "#208020",
    },
  },
] as const;

// The Alert block.
export const Alert = createReactBlockSpec(
  {
    type: "alert",
    propSchema: {
      textAlignment: defaultProps.textAlignment,
      textColor: defaultProps.textColor,
      type: {
        default: "warning",
        values: ["warning", "error", "info", "success"],
      },
    },
    content: "inline",
  },
  {
    render: (props) => {
      const alertType = alertTypes.find(
        (a) => a.value === props.block.props.type,
      )!;
      const Icon = alertType.icon;
      return (
        <div className={"alert"} data-alert-type={props.block.props.type}>
          {/*Icon which opens a menu to choose the Alert type*/}
          <Menu withinPortal={false}>
            <Menu.Target>
              <div className={"alert-icon-wrapper"} contentEditable={false}>
                <Icon
                  className={"alert-icon"}
                  data-alert-icon-type={props.block.props.type}
                  size={32}
                />
              </div>
            </Menu.Target>
            {/*Dropdown to change the Alert type*/}
            <Menu.Dropdown>
              <Menu.Label>Alert Type</Menu.Label>
              <Menu.Divider />
              {alertTypes.map((type) => {
                const ItemIcon = type.icon;

                return (
                  <Menu.Item
                    key={type.value}
                    leftSection={
                      <ItemIcon
                        className={"alert-icon"}
                        data-alert-icon-type={type.value}
                      />
                    }
                    onClick={() =>
                      props.editor.updateBlock(props.block, {
                        type: "alert",
                        props: { type: type.value },
                      })
                    }
                  >
                    {type.title}
                  </Menu.Item>
                );
              })}
            </Menu.Dropdown>
          </Menu>
          {/*Rich text field for user to type in*/}
          <div className={"inline-content"} ref={props.contentRef} />
        </div>
      );
    },
  },
);

import {
  BlockNoteSchema,
  defaultBlockSpecs,
  filterSuggestionItems,
  insertOrUpdateBlock,
} from "@blocknote/core";
import "@blocknote/core/fonts/inter.css";
import { BlockNoteView } from "@blocknote/mantine";
import "@blocknote/mantine/style.css";
import {
  BlockTypeSelectItem,
  FormattingToolbar,
  FormattingToolbarController,
  SuggestionMenuController,
  blockTypeSelectItems,
  getDefaultReactSlashMenuItems,
  useCreateBlockNote,
} from "@blocknote/react";

import { RiAlertFill } from "react-icons/ri";
import { Alert } from "./Alert";

// Our schema with block specs, which contain the configs and implementations for
// blocks that we want our editor to use.
const schema = BlockNoteSchema.create({
  blockSpecs: {
    // Adds all default blocks.
    ...defaultBlockSpecs,
    // Adds the Alert block.
    alert: Alert,
  },
});

// Slash menu item to insert an Alert block
const insertAlert = (editor: typeof schema.BlockNoteEditor) => ({
  title: "Alert",
  subtext: "Alert for emphasizing text",
  onItemClick: () =>
    // If the block containing the text caret is empty, `insertOrUpdateBlock`
    // changes its type to the provided block. Otherwise, it inserts the new
    // block below and moves the text caret to it. We use this function with an
    // Alert block.
    insertOrUpdateBlock(editor, {
      type: "alert",
    }),
  aliases: [
    "alert",
    "notification",
    "emphasize",
    "warning",
    "error",
    "info",
    "success",
  ],
  group: "Basic blocks",
  icon: <RiAlertFill />,
});

export default function App() {
  // Creates a new editor instance.
  const editor = useCreateBlockNote({
    schema,
    initialContent: [
      {
        type: "paragraph",
        content: "Welcome to this demo!",
      },
      {
        type: "alert",
        content: "This is an example alert",
      },
      {
        type: "paragraph",
        content: "Press the '/' key to open the Slash Menu and add another",
      },
      {
        type: "paragraph",
        content:
          "Or select some text to see the alert in the Formatting Toolbar's Block Type Select",
      },
      {
        type: "paragraph",
      },
    ],
  });

  // Renders the editor instance.
  return (
    <BlockNoteView editor={editor} formattingToolbar={false} slashMenu={false}>
      {/* Replaces the default Formatting Toolbar */}
      <FormattingToolbarController
        formattingToolbar={() => (
          // Uses the default Formatting Toolbar.
          <FormattingToolbar
            // Sets the items in the Block Type Select.
            blockTypeSelectItems={[
              // Gets the default Block Type Select items.
              ...blockTypeSelectItems(editor.dictionary),
              // Adds an item for the Alert block.
              {
                name: "Alert",
                type: "alert",
                icon: RiAlertFill,
                isSelected: (block) => block.type === "alert",
              } satisfies BlockTypeSelectItem,
            ]}
          />
        )}
      />
      {/* Replaces the default Slash Menu. */}
      <SuggestionMenuController
        triggerCharacter={"/"}
        getItems={async (query) => {
          // Gets all default slash menu items.
          const defaultItems = getDefaultReactSlashMenuItems(editor);
          // Finds index of last item in "Basic blocks" group.
          const lastBasicBlockIndex = defaultItems.findLastIndex(
            (item) => item.group === "Basic blocks",
          );
          // Inserts the Alert item as the last item in the "Basic blocks" group.
          defaultItems.splice(lastBasicBlockIndex + 1, 0, insertAlert(editor));

          // Returns filtered items based on the query.
          return filterSuggestionItems(defaultItems, query);
        }}
      />
    </BlockNoteView>
  );
}

.alert {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-grow: 1;
  border-radius: 4px;
  min-height: 48px;
  padding: 4px;
}

.alert[data-alert-type="warning"] {
  background-color: #fff6e6;
}

.alert[data-alert-type="error"] {
  background-color: #ffe6e6;
}

.alert[data-alert-type="info"] {
  background-color: #e6ebff;
}

.alert[data-alert-type="success"] {
  background-color: #e6ffe6;
}

[data-color-scheme="dark"] .alert[data-alert-type="warning"] {
  background-color: #805d20;
}

[data-color-scheme="dark"] .alert[data-alert-type="error"] {
  background-color: #802020;
}

[data-color-scheme="dark"] .alert[data-alert-type="info"] {
  background-color: #203380;
}

[data-color-scheme="dark"] .alert[data-alert-type="success"] {
  background-color: #208020;
}

.alert-icon-wrapper {
  border-radius: 16px;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-left: 12px;
  margin-right: 12px;
  height: 18px;
  width: 18px;
  user-select: none;
  cursor: pointer;
}

.alert-icon[data-alert-icon-type="warning"] {
  color: #e69819;
}

.alert-icon[data-alert-icon-type="error"] {
  color: #d80d0d;
}

.alert-icon[data-alert-icon-type="info"] {
  color: #507aff;
}

.alert-icon[data-alert-icon-type="success"] {
  color: #0bc10b;
}

.inline-content {
  flex-grow: 1;
}