Documentation - Mapped TypesWhen you don’t want to repeat yourself, sometimes a type needs to be based on another type. Mapped types build on the syntax for index signatures, which are used to declare the types of properties which have not been declared ahead of time:
Documentation - Configuring Watch
As of TypeScript 3.8 and onward, the Typescript compiler exposes configuration which controls how it watches files and directories. Prior to this version, configuration required the use of environment variables which are still available. Background The --watch implementation of the compiler relies on Node’s fs.watch and fs.watchFile. Each of these methods has pros and cons. fs.watch relies on file
TypeScript Cheat Sheets
Popular Documentation PagesEveryday TypesAll of the common types in TypeScript Creating Types from TypesTechniques to make more elegant types More on FunctionsHow to provide types to functions in JavaScript More on ObjectsHow to provide a type shape to JavaScript objects NarrowingHow TypeScript infers types based on runtime behavior Variable DeclarationsHow to create and type JavaScript variables
Documentation - Creating Types from Types
TypeScript’s type system is very powerful because it allows expressing types in terms of other types. The simplest form of this idea is generics. Additionally, we have a wide variety of type operators available to use. It’s also possible to express types in terms of values that we already have. By combining various type operators, we can express complex operations and values in a succinct, maintai
Documentation - Do's and Don'ts
General Types Number, String, Boolean, Symbol and Object ❌ Don’t ever use the types Number, String, Boolean, Symbol, or Object These types refer to non-primitive boxed objects that are almost never used appropriately in JavaScript code.
JavaScript With Syntax For Types.
TypeScript is JavaScript with syntax for types.TypeScript is a strongly typed programming language that builds on JavaScript, giving you better tooling at any scale.
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Documentation - Templates
https://www.typescriptlang.org/Handbook/
