TypeScript Template Literals

Create powerful string pattern types using TypeScript template literal types.

Usage

Describe your string typing needs and get template literal type solutions.

Examples

• "Create a type for CSS color values like #RRGGBB"
• "Type API routes as /api/${resource}/${id}"
• "Build an event handler type that matches on${EventName}"

Guidelines

• Show basic template literal type construction
• Cover string manipulation utilities: Uppercase, Lowercase, etc.
• Include key remapping with template literals in mapped types
• Explain inference within template literal types
• Warn about performance with large union expansions