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DevCoder
DevCoder

Reputation: 121

JavaScript: Enum Flag check

I want to check if a flag is set in my enum value. What is wrong with my code?

Javascript-Code

var flags = {
  FOO: 1,
  BAR: 2,
  BAZ: 4,
  FUM: 8,
  ERROR: 65
}

var value = flags.FOO | flags.BAR;

if (value & flags.ERROR){
   alert("ERROR IS SET, but this is not true");
}

Upvotes: 1

Views: 5113

Answers (1)

Mario Levrero
Mario Levrero

Reputation: 3367

First yours values should be n^2:

var flags = {
  UNKNOWN: 0, 
  FOO: 1,
  BAR: 2,
  BAZ: 4,
  FUM: 8,
  ERROR: 16
}

Then your statement should be:

if ((value & flags.ERROR) == flags.ERROR){
   alert("ERROR IS SET");
}

Upvotes: 3

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