A clearfix makes a parent element wrap around its floated children again, so borders, backgrounds and the content that follows stay where you expect. The examples outline every parent with a dashed border and every floated box with a solid one, so you can see the helper at work.
1Two floated buttons
The parent wraps a float-start and a float-end button, so its dashed border surrounds both.
Dashed border: the .clearfix parent. It keeps its height even though both children float.
<div class="hp-cf clearfix">
<button type="button" class="btn btn-outline-secondary float-start">Back</button>
<button type="button" class="btn btn-primary float-end">Continue</button>
</div>
<p class="small text-body-secondary mt-2 mb-0">Dashed border: the .clearfix parent. It keeps its height even though both children float.</p>
2With and without clearfix
Side by side comparison: without the helper the parent collapses to its padding and the float hangs out.
A quote floated to the end of the paragraph; the article wrapper is cleared so the next section starts below.
"Go further, travel better"
Every detail is handled by people who care about getting it right. We keep things simple, so you can focus on what matters to you. Travel insurance and car rental can be added in a single click.
Local guides show you the places that never make it into guidebooks.
Next section starts on a clean line
<article class="hp-cf clearfix">
<blockquote class="hp-fl float-sm-end ms-sm-3 mb-2 p-3 fs-6 fst-italic">"Go further, travel better"</blockquote>
<p class="mb-2">Every detail is handled by people who care about getting it right. We keep things simple, so you can focus on what matters to you. Travel insurance and car rental can be added in a single click.</p>
<p class="mb-0">Local guides show you the places that never make it into guidebooks.</p>
</article>
<h3 class="h6 mt-3 mb-0">Next section starts on a clean line</h3>
8Comment with avatar
A comment row with a floated avatar and a floated time stamp.
3 hours ago
Noah Ashford
Flexible dates help you find quieter weeks and better prices.
An icon floated left, a time stamp floated right and the message in between.
just now
Thousands of travellers already trust us, and we work hard to keep it that way.
<div class="hp-cf clearfix bg-body">
<span class="hp-fl float-start me-2 px-2 py-1 text-primary"><i class="bi bi-bell" aria-hidden="true"></i></span> <small class="float-end text-body-secondary">just now</small>
<p class="small mb-0">Thousands of travellers already trust us, and we work hard to keep it that way.</p>
</div>
16Pricing card label
A floated badge in the top corner of a pricing card body.
A product image floated to the end of a card body with the description flowing around it.
Mountain lodge
From city breaks to safaris, we plan trips around how you like to travel.
<div class="card">
<div class="card-body hp-cf clearfix">
<img src="../assets/img/product-3.svg" alt="Mountain lodge" width="110" height="110" class="hp-fl float-end ms-3 rounded">
<h3 class="h6">Mountain lodge</h3>
<p class="small mb-0">From city breaks to safaris, we plan trips around how you like to travel.</p>
</div>
</div>
20Sidebar and content
A classic two-column float layout: a floated nav box and a content box; clearfix closes the row.
How to pack for two weeks with one bag
Airport transfers, tours and dinners are arranged before you arrive. Start in minutes and get help from a real person whenever you need it. Friendly people answer your questions quickly, by phone, chat or email.
<div class="hp-cf clearfix">
<nav class="hp-fl float-sm-start me-sm-3 mb-2 p-2" aria-label="Section">
<ul class="nav flex-column small">
<li class="nav-item"><a class="nav-link active py-1" aria-current="page" href="#">Overview</a></li>
<li class="nav-item"><a class="nav-link py-1" href="#">Members</a></li>
<li class="nav-item"><a class="nav-link py-1" href="#">Billing</a></li>
</ul>
</nav>
<div class="overflow-hidden">
<h3 class="h6">How to pack for two weeks with one bag</h3>
<p class="small mb-0">Airport transfers, tours and dinners are arranged before you arrive. Start in minutes and get help from a real person whenever you need it. Friendly people answer your questions quickly, by phone, chat or email.</p>
</div>
</div>