What is the best way to utilize the z-index property to ensure that the preceding element covers the one that follows

Is it possible to create an effect where the previous block overlaps the next one using CSS?

.container {
  padding: 70px;
  width: 500px;
  margin: auto;
  display: flex;
}

.block {
  margin-left: -30px;
  width: 200px;
  height: 100px;
  border: 1px dotted green;
  transform: skewY(20deg)
}

.red {
  background-color: red;
}

.green {
  background-color: green;
}

.blue {
  background-color: blue;
}

.black {
  background-color: black;
}
<div class="container">
  <div class="block red">Text...</div>
  <div class="block green">Text...</div>
  <div class="block blue">Text...</div>
  <div class="block black">Text...</div>
</div>

You could manually set z-index for each block with CSS, but imagine if there were a hundred blocks?

Codepen link:

https://codepen.io/pen/?template=zYoJVdp

htmlcss

Answer №1

Exploring the concept of a 3D rotation:

.container {
  padding: 70px;
  width: 500px;
  margin: auto;
  display: flex;
  transform-style: preserve-3d; /*  necessary for the technique */
}

.block {
  margin-left: -30px;
  width: 200px;
  height: 100px;
  border: 1px dotted green;
  transform: rotateY(-1deg) skewY(20deg); /* slight rotation applied here */
}

.red {
  background-color: red;
}

.green {
  background-color: green;
}

.blue {
  background-color: blue;
}

.black {
  background-color: black;
}
<div class="container">
  <div class="block red">Text...</div>
  <div class="block green">Text...</div>
  <div class="block blue">Text...</div>
  <div class="block black">Text...</div>
</div>

For further information, visit : Explaining why an element with a z-index value cannot cover its child elements

Answer №2

To achieve this effect, you may want to consider using JavaScript or jQuery.

One simple way to accomplish this with jQuery is by implementing a function that increases the z-index of each block by one:

$(".block").each(function(i) {
  i++
  $(this).css("z-index", i);
});
.container{
  padding: 70px;
  width: 500px;
  margin: auto;
  display: flex;
}
.block{
  margin-left: -30px;
  width: 200px;
  height: 100px;
  border: 1px dotted green;
  transform: skewY(20deg)
}
.red{
  background-color: red;
}
.green{
  background-color: green;
}
.blue{
  background-color: blue;
}
.black{
  background-color: black;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<div class="container">
  <div class="block red">Text...</div>
  <div class="block green">Text...</div>
  <div class="block blue">Text...</div>
  <div class="block black">Text...</div>
</div>

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