Question

I’m wanting to add a class ‘slide-number-x’ to an element within each slide in a slider, with the ‘x’ representing the slide number in the dom.

So, for example this simple HTML markup:

<div class="slider">
    <div class="slide"><div class="slide-title"></div></div>
    <div class="slide"><div class="slide-title"></div></div>
    <div class="slide"><div class="slide-title"></div></div>
    <div class="slide"><div class="slide-title"></div></div>
</div>

Would become:

<div class="slider">
    <div class="slide slide-number-1"><div class="slide-title"></div></div>
    <div class="slide slide-number-2"><div class="slide-title"></div></div>
    <div class="slide slide-number-3"><div class="slide-title"></div></div>
    <div class="slide slide-number-4"><div class="slide-title"></div></div>
</div>

I thought this would work:

$('.slide').each(function(i){
  $(this).addClass('slide-number'i+1);
});

Any help or ideas?

Many thanks,
R

Answer 1

You forgot the concatenation operator (+), use:

$('.slide').each(function(i){
  $(this).addClass('slide-number-' + (i+1));
});