How to add custom classes to standard Gutenberg elements?

Question

css

Primitive elements are rendered in their pure form, without any classes, such as Paragraph: or List:
<p>тут какой то текст</p>

<ul>
  <li>текст пункта<li>
</ul>

You need to add your own classes to these elements. The question is how to do it the right way (functions.php, etc.)?
---
User response (NOT CORRECT): When you select any standard element, there is a "Block" tab in the right sidebar (where the record settings are displayed). There, in the "Additional" drop-down block, you can specify the classes you need.
Why?
The user should not even hear about classes and tags.

Answer 1

add_filter('render_block', 'wrapBlock', 10, 2);

function wrapBlock($block_content, $block)
{
    $name = $block['blockName'];

    if ($name)
    {
        return sprintf('<div class="e-block e-block-%s">%s</div>', str_replace('/', '-', $name), $block_content);
    }

    return $block_content;
}

Answer 2

When you select any standard element, then in the right sidebar (where the record settings are displayed) there is a "Block" tab. There, in the "Additional" drop-down block, you can specify the classes you need.