JS code help

Question

What I’m about to say will make sense once you run the code.
let elements = doc...selectorAll(“elem”)
// 13 of them.

So in the if statement, when I put a number for max, it works perfectly fine:
Example:
if (i <= 13) {
do.something
}
// works.
That works fine.
But if I do:

if (i <= elements.length) {
do.something
}

// does not work ... error

Why might that be, and how can we fix it?

https://code.sololearn.com/WVFKv0ICtAd8/?ref=app

Answer 1

ODLNT 👍
Ok, after many tries, I’m out of ideas.
I tried;
len = elem.length + 1; (and - 1).
// didn’t work. good try though

And then, tried to add 1 to i.
var i = 1;

I tried the opposite:
i = 0 - 1 (-1)

Still no.
The first solution, at the top that looks like it would work, but....

Answer 2

ODLNT That helps.
It’s working like it should now.

But, I didn’t get the “...too much (else if)” part. I tried to switch things around, and simplify to one “if (...) else {...}” statement, but that won’t work.

Like... all those else ifs are necessary.

Answer 3

It may seem like the (else if) are necessary but they're not.

https://code.sololearn.com/WpSH6TOG04mt/#js

Answer 4

ODLNT O, I see. Make sense.
Thanks a lot.

Answer 5

Your code is working fine

Answer 6

SOUPTIK NATH you don’t see any TypeErrors?

Run the code, click “Previous” and see wut happenz

Answer 7

The length of the element list is 13 but indexing starts at 0 and end at 12 in this case. You need to account for that.

Answer 8

Ginfio
The first solution looks like it would work because it does work. But your logic is verbose /overkill, you need to simplify.
Hint: too too much (else if)

Answer 9

i < elements.length