AtScript was planned to be a superset of TypeScript (which is itself a superset of JavaScript). In March 2015, AtScript was merged into the TypeScript project so the two are now equivalent.
AtScript is a superset of TypeScript (which is itself a superset of JavaScript).
Compared to ECMAScript 6, AtScript has types, annotations, and type introspection.
In March 2015, AtScript was merged into the TypeScript project.