Template Literal Types - Typescript 4.1 Beta Brings

The introduction of template literal types solved several long-standing type-safety challenges:

Template literal types bring the syntax of JavaScript's template strings (using backticks and ${} ) into type positions. While standard string literal types define a variable as holding a specific, fixed string, template literal types allow for the of new string types by concatenating existing ones. Key Syntax and Composition TypeScript 4.1 beta brings template literal types

: If a union of types is used within the template, TypeScript generates every possible combination of those strings. The introduction of template literal types solved several

: Combining a literal type with a template produces a single, specific string type. specific string type.