How to Define Type Aliases in Dart

In Dart, you can use a typedef to define type aliases for your function and non-function types.

They make your code more concise, so you can avoid repeating long type names. 👌

Typedefs are particularly useful for functions with many arguments or complex types with generics. 👍

Example:

typedef SpecialMap = Map<int, String>;
 
void main() {
  final specialMap = SpecialMap();
  specialMap[1] = 'one'; // ok
  specialMap.addAll({'2': 'two'}); // The element type 'String' can't be assigned to the map key type 'int'
}