How does Inject work in Angular 2?

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Vitaly2017-01-12 15:15:22

Angular

Vitaly, 2017-01-12 15:15:22

I'm trying to understand how decorators manage to call the component's constructor with the right services in the right order, guided by the enumeration of arguments in the constructor itself. Is there an additional preprocessor involved here, or can this be repeated using TypeScript?

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_ _, 2017-01-12
@vitali1995

Inject is based on reflect-metadata
This is an additional JS library, more precisely Metadata Reflection is one of the ES7 APIs, and reflect-metadata is a polyfill