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tests/cases/conformance/types/objectTypeLiteral/methodSignatures/objectTypesWithOptionalProperties.ts(24,6): error TS1162: An object member cannot be declared optional.
==== tests/cases/conformance/types/objectTypeLiteral/methodSignatures/objectTypesWithOptionalProperties.ts (1 errors) ====
// Basic uses of optional properties
var a: {
x?: number; // ok
}
interface I {
x?: number; // ok
}
class C {
x?: number; // ok
}
interface I2<T> {
x?: T; // ok
}
class C2<T> {
x?: T; // ok
}
var b = {
x?: 1 // error
~
!!! error TS1162: An object member cannot be declared optional.
}
|
