The cards.update() method refreshes the Kanban UI to display updated card properties.
DayPilot.Kanban.cards.update(card);card (DayPilot.Card) - updated card object
Modify the card properties first and then call cards.update() to redraw the card using the current data.
const card = kanban.cards.find(1);
card.data.name = "Task 1";
kanban.cards.update(card);