为什么无法在Array中检测到更大的JavaScript字符串？

Question

This is a part from my code.I'm doing a javascript exercise.

switch(size) {
   case "big":
        var nameSize = "";
        if(fNames[i].length > nameSize.length) {
            nameSize = fNames[i];
        }
        console.log("Your Female Big: " + nameSize);
   break;

The user chooses the name with "big" size (the biggger string in array) through a prompt() . I trying to verify if fNames[i] is the bigger string in my array fNames to return for the user, but isnt working, it is return all strings. . What am I doing wrong?

----> JSfiddle

Update

This code works:

var array = [3, 6, 2, 56, 32, 5, 89, 32];
var largest = 0;
for(i = 0; i < array.length; i++) {
    if(array[i] > largest) {
        largest = array[i];
    }
}
console.log(largest);

(from codecademy)

It is the same logic, i think. Why my code does not work, then?

Answer 1

I think you should add .length :

nameSize = fNames[i].length;

If this is happening inside a loop you should check the length of the biggest compared to the var in the loop:

var name = '';
if(fNames[i].length > name.length) {
    name = fNames[i];
}

Notice that in the if you use .length on both the variables.