Tests whether an object has a value at the specified index.

STDAPI_(JsErrorCode)
    JsHasIndexedProperty(
    _In_ JsValueRef object,
    _In_ JsValueRef index,
    _Out_ bool *result);

• object: The object to operate on.
• index: The index to test.
• result: Whether the object has an value at the specified index.

The code JsNoError if the operation succeeded, a failure code otherwise.

Requires an active script context.