Custom list blot not work IndentClass (quilljs)

Question

I create custom blot, enter image description here but for some reason the creation of child items does not work when you press tab at the list item. IndentClass does not work and I do not understand how to connect it. Path IndentClass - quill\formats\indent

  // eslint-disable-next-line no-unused-vars
    import Quill, { ListItem } from 'quill';

let Block = Quill.import('blots/block');
let Container = Quill.import('blots/container');

class NumberListContainer extends Container {}
NumberListContainer.blotName = 'c-number-list-container';
NumberListContainer.tagName = 'OL';

class NumberListItem extends Block {
    static create(value) {
        const node = super.create();
        console.log(typeof value, value, 'value');
        node.setAttribute('data-list', value);
        return node;
    }

    static formats(domNode) {
        return domNode.getAttribute('data-list') || undefined;
    }

    static register() {
        Quill.register(NumberListContainer);
    }

    constructor(scroll, domNode) {
        console.log( 'value111');
        super(scroll, domNode);
        const ui = domNode.ownerDocument.createElement('span');
        // eslint-disable-next-line no-unused-vars
        const listEventHandler = e => {
            if (!scroll.isEnabled()) return;
            const format = this.statics.formats(domNode, scroll);
            if (format === 'checked') {
                this.format('list', 'unchecked');
                e.preventDefault();
            } else if (format === 'unchecked') {
                this.format('list', 'checked');
                e.preventDefault();
            }
        };
        ui.addEventListener('mousedown', listEventHandler);
        ui.addEventListener('touchstart', listEventHandler);
        this.attachUI(ui);
    }

    format(name, value) {
        if (name === this.statics.blotName && value) {
            this.domNode.setAttribute('data-list', value);
        } else {
            super.format(name, value);
        }
    }
}
NumberListItem.blotName = 'c-number-list';
NumberListItem.tagName = 'LI';
NumberListItem.className = 'c-number-list';

NumberListContainer.allowedChildren = [NumberListItem];
NumberListItem.requiredContainer = NumberListContainer;

Quill.register(NumberListContainer);
Quill.register(NumberListItem);