_updateDomDefault () {
    // Short-circuit if schema is missing, has no default, or if Node has children
    if (!this.schema || this.schema.default === undefined || this._hasChilds()) {
      return
    }

    // select either enum dropdown (select) or input value
    const inputElement = this.dom.select
      ? this.dom.select
      : this.dom.value

    if (!inputElement) {
      return
    }

    if (this.value === this.schema.default) {
      inputElement.title = translate('default')
      addClassName(inputElement, 'jsoneditor-is-default')
      removeClassName(inputElement, 'jsoneditor-is-not-default')
    } else {
      inputElement.removeAttribute('title')
      removeClassName(inputElement, 'jsoneditor-is-default')
      addClassName(inputElement, 'jsoneditor-is-not-default')
    }
  }
Update the value of the schema default element in the DOM.
@private
@returns {undefined}