What are the differences between AngularJS and Angular with respect to dependency injection?

Dependency injection is a common component in both AngularJS and Angular, but there are some key differences between the two frameworks in how it actually works.

AngularJSAngular
Dependency injection tokens are always stringsTokens can have different types. They are often classes and sometimes can be strings.
There is exactly one injector even though it is a multi-module applicationsThere is a tree hierarchy of injectors, with a root injector and an additional injector for each component.

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Made by Michael Sakhniuk

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