The open-source Google-backed development environment AngularJS was first officially introduced back in 2010. This framework turned out to be a real breakthrough for the entire professional Internet community. It made it possible to turn static HTML layouts into dynamic ones. The new architecture made it relatively easy to embed active forms and elements on web pages. It is customary to distinguish between the first version and all subsequent ones (and there are already nine of them) All versions released after 2016 are designated as just Angular”]
Source: https://gbhackers.com/pros-and-cons-of-angular-development-framework/