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    Type Alias StringIncludes<Subject, Search, Then, Else>

    StringIncludes: Subject extends `${infer _X}${Search}${infer _Y}` ? Then : Else

    Check if Subject includes Search. If either of them is not a string, returns Else.

    type R = StringIncludes<'abc', 'a'> // true

    type R = StringIncludes<'abc', 'd'> // false

    Type Parameters

    • Subject extends string
    • Search extends string
    • Then = true
    • Else = false

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