How Do I Change Node Class On Expire Date

I’m Developing a Coupon website using Drupal 8 and really enjoying playing with Drupal 8. However, I’ve created a node type called deal and added a date field named expire. Now I want to change or add class when the node reached the expire date so then it will be automatically marked as expire by changing node class from active to expire.

How do I create the functionality whether programming or using modules?

Drupal version: