How Does the `display` Property Affect Flexbox Item Layout?

Understanding the Display Property in Flexbox Items

In Flexbox, the display property controls the layout of child elements within a flex container. While flex items default to display: block, modifying this property can introduce interesting effects and functional benefits. Two common options are display:block and display:inline-block.

Key Considerations:

The CSS specification clarifies that setting display to inline-level values like display:inline-block will be computed to block-level values (in this case, block) when used as a child of a flex container. Therefore, there is no practical difference between display:block and display:inline-block in flexbox items.

However, setting display to table, inline-table, inline-grid, or grid can have significant effects. In these cases, the flex item will adopt the behavior of the specified display type.

Example:

Consider the following code:

.box {
  display: flex;
  margin:5px;
}

.box>div {
  height: 50px;
  width: 100%;
  background: red;
  display: grid;
  grid-template-columns: 200px 1fr;
  grid-template-rows: 1fr;
  grid-gap: 20px;
}

span {
  border: 2px solid green;
}

<div class="box">
  <div>
    <span></span>

    <span></span>
  </div>
</div>

<div class="box">
  <div>
<p>In the first box, the <strong>display:grid</strong> property transforms the flex item into a grid, with two columns and one row. The spans inside the grid are aligned according to the grid layout.</p>
<p>In the second box, setting <strong>display:inline-grid</strong> results in an inline grid, where the spans are presented horizontally instead of vertically.</p>
<p>By manipulating the display property, you can harness the power of Flexbox and other display types to create flexible and complex layouts.</p>
</div>
</div>

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