如何在不使用 z-index 的情況下在嵌套元素上建立邊框疊加？

Creating Border Overlays for Nested Elements

In this programming inquiry, the task is to replicate a specific layout featuring a border overlay on a nested element. The HTML structure and initial CSS styles are provided, but a solution without using z-index is sought.

To achieve this, consider employing pseudo elements to generate the border. This technique offers greater control over the border's positioning and dimensions:

body {
  background: grey;
}

.button {
  background: #94c120;
  width: 200px;
  height: 50px;
  margin: 50px;
  position: relative;
}

.button:before {
  content: "";
  position: absolute;
  top: -15px;
  left: -15px;
  width: 100%;
  height: 100%;
  border: 5px solid #fff;
  box-sizing: border-box;
}

In the provided HTML, the button element can be updated to utilize this approach:

<div class="button">
  some text
</div>

This solution creates the desired border overlay without the need for additional markup or manipulation of z-index. By leveraging pseudo elements, developers can achieve precise control and customization of border styles within nested elements.

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