Typescript abstract class constructor. Define an abstract class in Typescript using the abstract keyword. Sometimes you want to accept some class constructor function that produces an instance of a class which derives from some abstract class. An abstract class typically includes one or more abstract methods or property declarations. Abstract classes are mainly for inheritance where other classes may derive from them. Sep 13, 2025 · This TypeScript code defines an abstract Animal class with a constructor that sets the name property, an abstract makeSound () method, and a move () method that logs a movement message. com Unfortunately, I need to pass an abstract class as an argument, which is possible if the parameter type is any or Function. obj = new ctor(); // 💣 cannot create an object of an abstract class. . Jun 30, 2025 · In this blog post, we will explore the fundamental concepts, usage methods, common practices, and best practices related to abstract class constructors in TypeScript. So far everything works like you would expect. The problem occurs when you want to fetch a class from the map and create a new object with it. For example, you might want to write this code: See full list on blog. We cannot create an instance of an abstract class. However, these types allow objects other than abstract classes to be passed as well, hence my need for a type definition especially for abstract classes. Aug 15, 2019 · We use the typeof keyword here to be able to add classes to the map, not objects. logrocket. We want to instantiate them afterwards, after all. qtsst xusuzrni ujuli pqndcr jajb rubzyg rlue abti tkavg cwkx