css - Select odd even child excluding the hidden child

Question

Line 3 is a hidden <div> . I don't want that one to be taken from the odd/even css rule.

What is the best approach to get this to work?

.hidden {display:none;}
.box:not(.hidden):nth-child(odd)  { background: orange; }
.box:not(.hidden):nth-child(even) { background: green;  }

<div class="wrap">
    <div class="box">1</div>
    <div class="box">2</div>
    <div class="box hidden">3</div>
    <div class="box">4</div>
    <div class="box">5</div>
    <div class="box">6</div>
    <div class="box">7</div>
</div>

Answer 1

:nth-child() pseudo-class looks through the children tree of the parent to match the valid child (odd, even, etc), therefore when you combine it with :not(.hidden) it won't filter the elements properly.

Alternatively, we could fake the effect by CSS gradient as follows:

.hidden {display:none;}

.wrap {
  line-height: 1.2em;
  
  background-color: orange; 
  background-image: linear-gradient(transparent 50%, green 50%);
  background-size: 100% 2.4em;
}

<div class="wrap">
  <div class="box">xx</div>
  <div class="box">xx</div>
  <div class="box hidden">xx</div>
  <div class="box">xx</div>
  <div class="box">xx</div>
  <div class="box">xx</div>
  <div class="box">xx</div>
</div>