What's wrong with parsing?

Question

JavaScript

It gives me null at the first check

function parseGuess(guess) {
    var alphabet = ["A", "B", "C", "D", "E", "F", "G"];
    if (guess === null || guess.lenght !== 2) {
        alert("Стрелять нужно по координатам в формате А2 и т д, и не выпендриваться!");
    }
    else {
        firstChart = guess.charAt(0);
        var row = alphabet.indexOf(firstChar);
        var column = guess.charAt(1);
        if (isNaN(row) || isNaN(column)) {
            alert("Слушай, это вообще мимо доски. Там нет кораблей!");
        }
        else {
            return row + column;
        }
    }
    return null;
}
console.log(parseGuess("B2"));

Answer 1

length, not length. Well, you don’t have firstChar, but there is firstChart
PS Well, when you check row, in order to display a message that “past the board”, you need to check not for NaN, but for < 0, since the expression
if it finds an element in the array will return it position, if not -1