Static properties

These properties are not instance-specific and are accessed by a class name instead of using the this keyword:

class Customer { 
     static bonusPercentage = 20; 
     constructor(public salary: number) {  } 
 
   calculateBonus() { 
          return this.salary * Customer.bonusPercentage/100; 
     } 
} 
var customer = new Customer(10000); 
var bonus = customer.calculateBonus(); 

Here, we declared a static variable called bonusPercentage that is accessed using the class name Customer in the calculateBonus method. This bonusPercentage property is not instance-specific.