SOURCE

var findMaxConsecutiveOnes = function(nums) {
    let conArr = [], count = 0;
    nums.forEach((val,index,arr) => {
        if (val == 1) {
            count++;
        } else {
            conArr.push(count);
            count = 0;
        }
    });
    conArr.push(count);
    return Math.max(...conArr);
};