TypeScript: Mixin classes

This PR expands upon #13604 to add support for mixin classes and constructors. The PR includes type system support for the ECMAScript 2015 mixin class pattern described here and here as well as rul…

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Introduction to TypeScript

Historically, JavaScript has ended up as the main language for scripting web pages and apps on the Internet. In addition, it is now possible to use JavaScript on both the frontend and the backend… (more…)

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