TypeScript Infer Keyword

Extract and capture types from complex structures using the infer keyword in conditional types.

Usage

Describe what type information you need to extract for infer-based solutions.

Examples

• "Extract the element type from an array type"
• "Get the resolved value type from a Promise"
• "Infer the parameters and return type of a function"

Guidelines

• Show infer placement within conditional type extends clauses
• Cover common extraction patterns: array items, promise values, function parts
• Include multiple infer positions in a single conditional
• Explain inference priority and ambiguity resolution
• Show recursive types using infer for deep extraction