Retrieves the double value of a number value.

STDAPI_(JsErrorCode)
    JsNumberToDouble(
    _In_ JsValueRef value,
    _Out_ double *doubleValue);

• value: The number value to convert to a double value.
• doubleValue: The double value.

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

This function retrieves the value of a number value. It will fail with JsErrorInvalidArgument if the type of the value is not number.