|Initial release||September 14, 2016|
4.1.0 / April 26, 2017
|Platform||Cross-platform, modern browsers only|
Angular (commonly referred to as "Angular 2+" or "Angular 2") is a TypeScript-based open-source front-end web application platform led by the Angular Team at Google and by a community of individuals and corporations to address all of the parts of the developer's workflow while building complex web applications. Angular is a complete rewrite from the same team that built AngularJS.
Angular was a ground-up rewrite of AngularJS and has many unique qualities.
Originally, the rewrite of AngularJS was called "Angular 2" by the team, but this led to confusion among developers. To clarify, the team announced that separate terms should be used for each framework.
Angular 2.0 was announced at the ng-Europe conference 22-23. September 2014. The drastic changes in the 2.0 version created considerable controversy among developers. On April 30, 2015, the Angular developers announced that Angular 2 moved from Alpha to Developer Preview. Angular 2 can be downloaded from the official website. Angular 2 moved to Beta in December 2015, and the first release candidate was published in May 2016. The final version was released on September 14, 2016.
On 13 December 2016 Angular 4 was announced, skipping 3 to avoid a confusion due to the misalignment of the router package's version which was already distributed as v3.3.0. The final version was released on March 23, 2017.. Angular 4 is backward compatible with Angular 2. 
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