In the past few years, Angular has started replacing some class-based features, such as guards and interceptors, with new function-based syntaxes.
What’s interesting about interceptors is that the old, dependency injection-based approach is not deprecated and remains valid, though it’s a bit more verbose and less convenient.
That said, I just updated this 2019 tutorial of mine to cover function-based interceptors instead:
The updated tutorial includes examples for intercepting both HTTP requests and responses.
