TypeScript 4.1 also introduced to support these new capabilities: Uppercase Lowercase Capitalize Uncapitalize
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 TypeScript 4.1 beta brings template literal types
: When combined with conditional types and the infer keyword, template literal types can act as a simple parser, breaking down complex strings into their constituent parts for deep type inspection. Conclusion Documentation - Template Literal Types - TypeScript TypeScript 4