What causes the flex div to inherit the full width of its parent div?

I'm having trouble understanding why a flex div always occupies 100% width of its parent element. Consider the code snippet below:

#wrapper {
  width: 100%;
  height: 100px;
  background: green;
}

#flex {
  color: white;
  display: flex;
  flex-direction: row;
  background: blue;
}
<div id="wrapper">
   <div id="flex">
     <div>Item</div>
     <div>Item</div>
     <div>Item</div>
     <div>Item</div>
   </div>
</div>

Can someone explain why the flex div is automatically expanding to 100% width of the parent container? Is there a way to limit its width to just fit the content inside?

Any assistance would be greatly appreciated, Thank you!

Answer №1

The #flex element is currently set to use display: flex. This property makes it a block-level element, similar to display: block, causing it to span the full width of its parent container. Consider using display: inline-flex instead for a different layout behavior.

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