Team engineer Orta Therox said
“In the last year, the TypeScript team has heavily focused on ramping up the scale, modernity and scope of our documentation. One of the most critical sections of our documentation is the handbook, a guided tour through the sort of TypeScript code you’ll see in most codebases. We want the handbook to feel like the first recommendation you give for learning TypeScript.”
Source: TypeScript Handbook Revamped as Primary Learning Resource — Visual Studio Magazine
Lars Fosdal 