FAQ: Boundaries and Space - Display: Flex

This community-built FAQ covers the “Display: Flex” exercise from the lesson “Boundaries and Space”.

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This exercise can be found in the following Codecademy content:

Make a Website

FAQs on the exercise Display: Flex

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Why does “display: inline” doesn’t horizontally align the images in this exercise?

I was wondering the same thing. Doing this course after the HTML/CSS ones has mostly been review but display: flex; is the first topic that wasn’t covered in the CSS course at all - we only learned about other display values such a inline, block, and inline-block, none of which seem to have any impact on this page when used instead of flex.

I did some experimenting and it looks like the key difference has to do with parent/child element relationships.


<!DOCTYPE html>

<link href="./test.css" type="text/css" rel="stylesheet">


<div class="rectangle">
	<p>I'm a rectangle!</p>
<div class="rectangle">
	<p>So am I!</p>
<div class="rectangle">
	<p>Me three!</p>

<div class="parent">
	<p>I'm the first child!</p>
	<p>I'm the second!</p>
	<p>I'm the third!</p>




.rectangle {
	border: 2px solid blue;
	width: 200px;
	height: 300px;
	display: inline-block;

.parent {
	margin-top: 10px;
	display: flex;

.parent p {
	border: 2px solid red;
	width: 200px;
	height: 300px;


Changing display to flex for the “rectangle” class had no effect, so that tells me that flex is only useful on container elements. On the other hand, changing display to inline-block for the “parent” class created some strange layout changes that I can’t explain.

Hopefully this helps someone!