Codility binary gap solution

gistfile1.txt

// wrong for trailing 0s, ... 
// 6, 328, n=16=2**4 and n=1024=2**10
// n=51712=110010100000000_2 and n=20=10100_2
function solution(N) {
    var max = 0;
    var currentLength = 0;
    
    while (N > 0) {
        var remainder = N % 2;
        inGap = remainder === 0;
    
        if (inGap) {
            currentLength += 1;
            max = Math.max(max, currentLength);
        } else {
            currentLength = 0;
        }
        
        N = Math.floor(N / 2);
    }
 
    return max;   
}