Type vs Interface

Type

• Use type when defining an alias for primitive types (string, boolean, number, bigint, symbol, etc)

• Use type when defining tuple types

• Use type when defining function types

• Use type when defining a union

type Nullish = null | undefined;
type Fruit = 'apple' | 'pear' | 'orange';
type Num = number | bigint;
type row = [colOne: number, colTwo: string];

Interface

• Use interface for all object types where using type is not required (see above)

• Using interface can extends from another interface, due to inheritance