Type Alias If<Cond, Then, Else>

If: Cond extends true ? Then : Else

Conditional type helper.

Type Parameters

Cond extends boolean
Boolean condition to evaluate
Then
Type returned if the condition is true
Else = never
Type returned if the condition is false (defaults to never)

Remarks

Evaluates a boolean condition at the type level and resolves to one of two branches.

Example

type Result = If< true, string, number >;  // string