TypeScript Const Assertions

Use as const assertions for literal type inference and deeply readonly values.

Usage

Ask about const assertions and their uses for precise, immutable type definitions.

Examples

• "Create an enum-like object with as const"
• "How does as const affect array and object types?"
• "Use as const with satisfies for a typed config object"

Guidelines

• Explain how as const makes types literal and readonly
• Show enum-like const objects as an alternative to TypeScript enums
• Cover tuple inference with as const on arrays
• Include combination with satisfies for validated literals
• Explain when as const is useful vs when it over-constrains