This document specifies the extensions to the core ESTree AST types to support type annotations.

Type Annotations

interface TypeAnnotation <: Node { }

Any type annotation.

Identifier

extend interface Identifier {
    typeAnnotation: TypeAnnotation | null;
}

The typeAnnotation property is used only in the case of variable declarations with type annotations or function arguments with type annotations.

extend interface Function {
    returnType: TypeAnnotation | null;
}

The returnType property is used to specify the type annotation for the return value of the function.

extend interface ObjectPattern {
    typeAnnotation: TypeAnnotation | null;
}

extend interface ArrayPattern {
    typeAnnotation: TypeAnnotation | null;
}

extend interface RestElement {
    typeAnnotation: TypeAnnotation | null;
}