e visible)&lt;/h3&gt;
&lt;div class="demo-box d-none"&gt;Hidden element (won't be visible)&lt;/div&gt;
&lt;h3&gt;Flex container&lt;/h3&gt;
&lt;div class="demo-box d-flex"&gt;
	&lt;div class="p-2 m-2"&gt;Item 1&lt;/div&gt;
	&lt;div class="p-2 m-2"&gt;Item 2&lt;/div&gt;
	&lt;div class="p-2 m-2"&gt;Item 3&lt;/div&gt;
&lt;/div&gt;</code></pre>
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