CodeQL library for JavaScript/TypeScript
codeql/javascript-all 1.1.1-dev (changelog, source)
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Member predicate Type::hasUnderlyingType

Holds if this refers to the given named type, or is declared as a subtype thereof, or is a union or intersection containing such a type.

This is useful for recognising expressions that may refer to an instance of a given type, without relying on the exact static type of the expression.

predicate hasUnderlyingType(string globalName)