Classes

Classes work similarly to object literal types and interfaces with one exception: they have both a static and an instance type. When comparing two objects of a class type, only members of the instance are compared. Static members and constructors do not affect compatibility.

class Animal {
  feet: number;
  constructor(name: string, numFeet: number) { }
}
 
class Size {
  feet: number;
  constructor(numFeet: number) { }
}
 
let a: Animal;
let s: Size;
 
a = s;  //OK
s = a;  //OK

Links:

https://www.typescriptlang.org/docs/handbook/type-compatibility.html#classes

doc_TypeScript

2025-01-10 15:47:30

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