How to use the react-dom-factories.a function in react-dom-factories

renderExperimentalMessage(browserName) {
    const underConstructionMessage =
      "Debugging is experimental and certain features won't work (i.e, seeing variables, attaching breakpoints)"; // eslint-disable-line max-len

    return dom.div(
      { className: "under-construction" },
      dom.div(
        { className: "under-construction-message" },
        dom.p({}, underConstructionMessage),
        dom.img({ src: "/pad-assets/under_construction.png" }),
        dom.a(
          {
            className: "github-link",
            target: "_blank",
            href: docsUrls.github
          },
          "Help us make it happen"
        )
      )
    );
  }

renderAsInline() {
    const {iri, href, rel} = this.getData();
    return D.a(
      {
        className: classnames({
          'semantic-inline--rdfa-set': rel !== null,
          'semantic-inline--rdfa-unset': rel === null,
        }),
        href: href,
        title: 'Ctrl-click to go to page for ' + iri,
        onMouseDownCapture: (e: MouseEvent) => {
          if (this.isInsidePropertiesButton(e)) {
            e.stopPropagation();
          }
        },
        onClickCapture: (e: MouseEvent) => {
          if (this.isInsidePropertiesButton(e)) {
            e.stopPropagation();
            this.showModal();

className: block('default-input').toString(),
              type: 'text',
              placeholder,
              onChange: e => onChange((e.target as HTMLInputElement).value, index),
              value,
            }),
            btn({
              className: block('delete-default').toString(),
              onClick: () => onDelete(index),
            }, D.span({className: 'fa fa-times'}))
          ),
          error ? (
            bsrow({className: block('error').toString()}, bscol({md: 12}, error.message))
          ) : null,
        ]),
        showAddButton ? D.a({onClick: onAdd}, addButtonLabel) : null,
      ],
    });
  }

const dataState = this.props.dataState;
    this.lastRenderedDataState = this.dataState();

    const size = this.props.values.size;
    const canEdit = dataState === DataState.Ready || dataState === DataState.Verifying;
    const canAddValue = canEdit && size < definition.maxOccurs;
    const canRemoveValue = canEdit && size > definition.minOccurs && size > 0;
    const fieldLabel = (getPreferredLabel(definition.label) || 'value').toLowerCase();

    return D.div(
      {className: COMPONENT_NAME},

      this.renderChildren(canRemoveValue),

      canAddValue ? (
        D.a({
          className: classnames({
            [`${COMPONENT_NAME}__add-value`]: true,
            [`${COMPONENT_NAME}__add-value--first`]: size === 0,
            [`${COMPONENT_NAME}__add-value--another`]: size > 0,
          }),
          onClick: this.addNewValue,
        }, `+ Add ${fieldLabel}`)
      ) : null
    );
  }

const Link = (props) => {
  const {url} = Entity.get(props.entityKey).getData();
  if (props.blockProps.parentEditor.props.readOnly === true) {
    return D.a({
      href: url,
      target: '_blank',
    }, props.children);
  } else {
    return D.a({
      href: url,
      title: 'Ctrl-click to go to ' + url,
      onClick: (e: MouseEvent) => {
        if (e.ctrlKey) {
          window.open(url, '_blank');
        }
      },
    }, props.children);
  }
};

});
    const addLabel = () => {
      const label = [...this.state.label];
      const validatedLabel = Validation.validateLabel('');
      label.push({value: validatedLabel, lang: lang || ''});
      this.updateState({label});
    };
    return D.div({},
      row({
        label: 'Label*',
        expanded: this.state.label.length > 0,
        expandOnMount: true,
        onExpand: () => addLabel(),
        element: [
          this.state.label.map((label, index) => this.renderLabel(label, index, langOptions)),
          Boolean(lang) ? D.a({onClick: () => addLabel()}, '+ Add label') : null,
        ],
      }),
      row({
        label: 'Identifier*',
        expanded: this.state.id.isJust,
        expandOnMount: true,
        onExpand: () => this.updateValues({id: empty}, Validation.validateIri),
        error: this.state.id.map(v => v.error).getOrElse(undefined),
        element: D.div({className: 'input-group'}, [
          input({
            className: block('iri-input').toString(),
            type: 'text',
            placeholder: 'Any IRI to be used as unique identifier for the field definition.',
            onChange: e => this.updateValues({id: getFormValue(e)}, Validation.validateIri),
            value: this.state.id.isJust ? this.state.id.get().value : undefined,
            disabled: this.isEditMode(),