JavaScript equivalent to .NET's Enum.HasFlag()

Asked Mar 16 '20 at 14:38

Active Mar 16 '20 at 14:43

Viewed 214 times

My .NET backend handle enum authorization with HasFlag()

Enum Foo {
  0: Zero,
  1: One,
  2: Two,
  3: Three,
  ..
}

5.HasEnum(Foo.One) is falsy because 5 is equal to 3 + 2
6.HasEnum(Foo.One) is truthy because 6 is equal to 3 + 2 + 1

How to handle it in JavaScript ?

I'm receiving a rôle (that is > 0 and < 1048), how to know if it has 32 rôle ?

edited Mar 16 '20 at 14:43

Robert Harvey

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asked Mar 16 '20 at 14:38

Delbo ar

1

but Enums don't exist in JS. What are you working on? An Object? – Jeremy Thille Mar 16 '20 at 14:41
You can create a function and put it on `Number` prototype. But its better to use your own construct – Rajesh Mar 16 '20 at 14:42
I'm receiving 64 e.g, how to know if it has 32 inside it ? I'm using TypeScript enums but it doesn't work like in .NET tho – Delbo ar Mar 16 '20 at 14:42
maybe you are talking about Typescript? if so, you can do a function that does the bitwise comparison – genuinefafa Mar 29 '21 at 13:03

JavaScript equivalent to .NET's Enum.HasFlag()

0 Answers0