What is null safety in Dart?

Your Dart program has a whole universe of types in it: primitive types like int and String , collection types like List , and all of the classes and types you and the packages you use define. Before null safety, the static type system allowed the value null to flow into expressions of any of those types .

Your Dart program has a whole universe of types in it: primitive types like int and String , collection types like List , and all of the classes and types you and the packages you use define. Before null safety, the static type system allowed the value null to flow into expressions of any of those types .

You can do this in two ways:

You can do this in two ways:

Migrating to null safety

Migrating to null safety

Migrating to Null-Safe Dart Dart introduced null safety in 2.12. 0, but there are old Dart codes in production. Since the Dart team can’t migrate your code automatically.