kIsWeb top-level constant Null safety
A constant that is true if the application was compiled to run on the web.
support integers. In this environment, Dart's doubles and ints are
backed by the same kind of object. Thus a double
0.0 is identical
to an integer
0. This is not true for Dart code running in AOT or on the
const bool kIsWeb = identical(0, 0.0);