Using & (bitwise AND operator) in Angular ng-if expressions

You cannot use the bitwise & operator in an Angular expression. According to the documentation:

Angular expressions are like JavaScript expressions with the following differences:

• ...
• You cannot use Bitwise, , or void operators in an Angular expression.

If you want to run more complex JavaScript code, you should make it a controller method and call the method from your view.

A note on nomenclature: & is the bitwise AND operator; && is the logical AND operator.

UPDATE: Your checkFlag function is probably the best workaround because its name makes it clear what it does (and that's what I would use), but if you absolutely don't want an extra function, you can use the following equivalent expression:

<div ng-if="value % 4 >= 2"> </div>

In general, (value & x) != 0 (where x is a power of 2) is equivalent to value % (2 * x) >= x.