Foreword
When TypeScript was officially announced on October 1, 2012, the only docs available was the dense official language specification. It was not easily accessible to beginner developers as there was significant focus on syntax. Additionally, it assumed an existing intimate knowledge of JavaScript. Nevertheless, it was complete in terms of TypeScript features at the time, and JavaScript was not as feature-rich as it is today. So, it was a plausible entry point into TypeScript, and that is what I and many others at the time used to learn TypeScript.
How times have changed. Over time, TypeScript has gained a number of features, and so has JavaScript. Keeping up to date now means following relevant GitHub issues and pull requests on Microsoft/TypeScript ...
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