useNotify

This hook returns a function that displays a notification at the bottom of the page.

Usage

import { useNotify } from 'react-admin';

const NotifyButton = () => {
    const notify = useNotify();
    const handleClick = () => {
        notify(`Comment approved`, { type: 'success' });
    }
    return <button onClick={handleClick}>Notify</button>;
};

The hook takes no argument and returns a callback. The callback takes 2 arguments:

• The message to display
• an options object with the following keys:
  • type: The notification type (info, success, error or warning - the default is info)
  • messageArgs: options to pass to the translate function (because notification messages are translated if your admin has an i18nProvider). It is useful for inserting variables into the translation.
  • undoable: Set it to true if the notification should contain an “undo” button
  • autoHideDuration: Duration (in milliseconds) after which the notification hides. Set it to 0 if the notification should not be dismissible.
  • multiLine: Set it to true if the notification message should be shown in more than one line.
  • anchorOrigin: The position of the notification. The default is { vertical: 'top', horizontal: 'right' }. See the MUI documentation for more details.

Here are more examples of notify calls:

// notify an error
notify(`This is an error`, { type: 'error' });
// notify a warning
notify(`This is a warning`, { type: 'warning' });
// pass translation arguments
notify('item.created', { type: 'info', messageArgs: { resource: 'post' } });
// send an undoable notification
notify('Element updated', { type: 'info', undoable: true });

anchorOrigin

You can change the default position of the notification by passing an anchorOrigin option. The value is passed to the MUI <Snackbar anchorOrigin> prop.

notify(
    'Form submitted successfully',
    { anchorOrigin: { vertical: 'top', horizontal: 'right' }
});

autoHideDuration

You can define a custom delay for hiding a given notification.

import { useNotify } from 'react-admin';

const LogoutButton = () => {
    const notify = useNotify();
    const logout = useLogout();

    const handleClick = () => {
        logout().then(() => {
            notify('Form submitted successfully', { autoHideDuration: 5000 });
        });
    };

    return <button onClick={handleClick}>Logout</button>;
};

To change the default delay for all notifications, check the Theming documentation.

messageArgs

useNotify calls the translate function to translate the notification message. You often need to pass variables to the translate function. The messageArgs option allows you to do that.

For instance, if you want to display a notification message like “Post 123 created”, you need to pass the post id to the translation function.

notify('post.created', { messageArgs: { id: 123 } });

Then, in your translation files, you can use the id variable:

{
    "post": {
        "created": "Post %{id} created"
    }
}

messageArgs also let you define a default translation using the _ key:

notify('post.created', { messageArgs: { _: 'Post created' } });

Finally, messageArgs lets you define a smart_count variable, which is useful for pluralization:

notify('post.created', { messageArgs: { smart_count: 2 } });

translate uses the smart_count value to choose the right translation in the post.created key:

{
    "post": {
        "created": "One post created |||| %{smart_count} posts created"
    }
}

multiLine

You can display a notification message on multiple lines.

notify(
    'This is a very long message that will be displayed on multiple lines',
    { multiLine: true }
);

type

This option lets you choose the notification type. It can be info, success, warning or error. The default is info.

notify('This is an info', { type: 'info' });
notify('This is a success', { type: 'success' });
notify('This is a warning', { type: 'warning' });
notify('This is an error', { type: 'error' });

undoable

When using useNotify as a side effect for an undoable mutation, you MUST set the undoable option to true, otherwise the “undo” button will not appear, and the actual update will never occur.

import * as React from 'react';
import { useNotify, Edit, SimpleForm } from 'react-admin';

const PostEdit = () => {
    const notify = useNotify();

    const onSuccess = () => {
        notify('Changes saved`', { undoable: true });
    };

    return (
        <Edit mutationMode="undoable" mutationOptions=>
            <SimpleForm>
                ...
            </SimpleForm>
        </Edit>
    );
}