Difference Of Typescript Function Declaration In Interfaces

What is the difference between these two declarations of functions in TypeScript Interfaces? interface IExample { myFunction(str: string): void; } and interface IExample { myF

Solution 1:

These declarations are completely equivalent.

The only relevant difference here is that the second form can't be used for function overloads:

// OKinterfaceExample {
    myFunction(s: string): void;
    myFunction(s: number): void;
}

// Not OKinterfaceExample {
    myFunction: (s: string) =>void;
    myFunction: (s: number) =>void;
}