function translatePigLatin(str) {
    var strArr = [];
    var tmpChar;

    // check if the char is consonant using RegEx
    function isConsonant(char) {
        return !/[aeiou]/.test(char);
    }

    // return initial str + "way" if it starts with vowel
    // if not - convert str to array
    if (!isConsonant(str.charAt(0)))
        return str + "way";
    else
        strArr = str.split("");

    // push all consonats to the end of the array
    while (isConsonant(strArr[0])) {
        tmpChar = strArr.shift();
        strArr.push(tmpChar);
    }
 // convert array to string and concatenate "ay" at the end
 return strArr.join("")+"ay";
}

// test here
translatePigLatin("consonant");