Template Literal Type limits for ARIA attribute validation

Enforcing ARIA naming conventions via types

TypeScript Template Literal Types enable the creation of strict string patterns, which can be used to ensure that component props conform to accessibility standards, such as requiring attributes to start with the aria- prefix.

While these types can be combined with mapped types and discriminated unions to link specific roles to their required attributes, complex validation patterns often rely on type-level recursion to verify naming conventions or ID mappings.

Constraints and Compilation Overhead

Extensive use of recursive template literals for accessibility validation can lead to significant increases in compilation time. Furthermore, there is a known threshold where deeply nested recursive types trigger the Type instantiation is excessively deep error.

What is the practical limit for recursive template literal depth when validating dynamic ARIA attribute patterns? At what point does the complexity of these type-level checks negatively impact build performance in large-scale projects?