This "paper" explores the introduction and application of template literal types, a feature introduced in the TypeScript 4.1 beta that expanded the language's ability to manipulate strings within the type system. Overview of Template Literal Types
: Developers can now enforce specific patterns, such as validating IPv4 addresses (e.g., $number.$number.$number.$number ) directly at the type level. TypeScript 4.1 beta brings template literal types
Example : Combining type Color = "red" | "blue" and type Size = "small" | "large" into $Color-$Size results in four distinct types: "red-small" , "red-large" , "blue-small" , and "blue-large" . Core Features and Utility Types This "paper" explores the introduction and application of
These utilities allow developers to transform string types for specific needs, such as ensuring event names are consistently uppercase or converting between camelCase and PascalCase. Practical Applications such as validating IPv4 addresses (e.g.