Вот решение
if (currentDelivery.PERIOD_TEXT && currentDelivery.PERIOD_TEXT.length)
{
period = BX.create('LI', {
children: [
BX.create('DIV', {props: {className: 'bx-soa-pp-list-termin'}, html: this.params.MESS_PERIOD + ':'}),
BX.create('DIV', {props: {className: 'bx-soa-pp-list-description'}, html: currentDelivery.PERIOD_TEXT})
]
});
}