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JavaScript

Posted by mryoung
mryoung
4,156 Points

Why is my for loop not reversing?

It just goes to the second slide (there are 3).

prev.addEventListener('click', function () {
    for(let i = 0; i < slides.length; i--){
        slides[i].style.display = 'none';
    }
 slideIndex--;

 if(slideIndex > slides.length){
    slideIndex = 1;
 }

 slides[slideIndex -1].style.display = 'block';
})

1 Answer

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,974 Points
KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,974 Points

With this you have an infinite loop

for(let i = 0; i < slides.length; i--)

slides.length is positive and you are looping from 0 to negative infinity so the condition will never be met.

Are you trying to do something like this?

for(let i = slides.length; i > 0 ; i--)
mryoung
mryoung
4,156 Points

Iā€™m trying to loop it backwards so when a button is clicked my images will just return from the last one to the first one.