Their main purpose is to change the direction of this. Call and Apply are not used much in everyday work, except when writing base classes or common library methods.

1 - Use the function keyword {code... } (a: string) => Represents a function that takes a string as input and returns no arguments. You can define an alias using the type keyword: {code... } Call signatures use Call signatures to add additional properties to the function. TypeScript functions are also values, along with other v...