Hamming Distance in JS

hammingDistance.js

/**
 * @param {number} x
 * @param {number} y
 * @return {number}
 */
var hammingDistance = function(x, y) {
    var resultStr =( x^y);
    let count =0;
    while(resultStr>0){
       resultStr =(resultStr&resultStr-1) ;   
       count++;    
    }
     return count;   
};