Flex utilities control flexbox layouts: direction, wrapping, alignment on both axes, growing, shrinking, order and gaps. Every utility has responsive variants such as flex-md-row or justify-content-lg-between, so one set of markup can stack on phones and spread out on larger screens.
1Direction
flex-row is the default, flex-row-reverse flips it, flex-column stacks items.
123123123<div class="grid gap-2">
<div class="flex gap-2 bg-surface-3 rounded-lg p-2 flex-row">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">1</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">2</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">3</code>
</div>
</div>
<div class="flex gap-2 bg-surface-3 rounded-lg p-2 flex-row-reverse">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">1</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">2</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">3</code>
</div>
</div>
<div class="flex gap-2 bg-surface-3 rounded-lg p-2 flex-col">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">1</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">2</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">3</code>
</div>
</div>
</div>2Justify content
start, center, end, between, around and evenly distribute free space on the main axis.
ABABABABABAB<div class="grid gap-2">
<div class="flex gap-2 bg-surface-3 rounded-lg p-2 justify-start">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">A</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">B</code>
</div>
</div>
<div class="flex gap-2 bg-surface-3 rounded-lg p-2 justify-center">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">A</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">B</code>
</div>
</div>
<div class="flex gap-2 bg-surface-3 rounded-lg p-2 justify-end">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">A</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">B</code>
</div>
</div>
<div class="flex gap-2 bg-surface-3 rounded-lg p-2 justify-between">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">A</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">B</code>
</div>
</div>
<div class="flex gap-2 bg-surface-3 rounded-lg p-2 justify-around">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">A</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">B</code>
</div>
</div>
<div class="flex gap-2 bg-surface-3 rounded-lg p-2 justify-evenly">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">A</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">B</code>
</div>
</div>
</div>3Align items
align-items-start, -center, -end and -stretch align items on the cross axis.
startxstartxstartxstartx<div class="row g-2">
<div class="col-6 col-md-3">
<div class="flex gap-2 bg-surface-3 rounded-lg p-2 items-start" style="height:100px">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">start</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">x</code>
</div>
</div>
</div>
<div class="col-6 col-md-3">
<div class="flex gap-2 bg-surface-3 rounded-lg p-2 items-center" style="height:100px">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">start</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">x</code>
</div>
</div>
</div>
<div class="col-6 col-md-3">
<div class="flex gap-2 bg-surface-3 rounded-lg p-2 items-end" style="height:100px">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">start</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">x</code>
</div>
</div>
</div>
<div class="col-6 col-md-3">
<div class="flex gap-2 bg-surface-3 rounded-lg p-2 items-stretch" style="height:100px">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">start</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">x</code>
</div>
</div>
</div>
</div>4Align self
align-self-* moves a single item on the cross axis.
startcenterendstretch<div class="flex gap-2 bg-surface-3 rounded-lg p-2" style="height:120px">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center self-start">
<code class="small">start</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center self-center">
<code class="small">center</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center self-end">
<code class="small">end</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center self-stretch">
<code class="small">stretch</code>
</div>
</div>5Fill and grow
flex-fill shares space equally, flex-grow-1 takes the remaining space.
flex-fillflex-fill wider textfillautoflex-grow-1auto<div class="grid gap-2">
<div class="flex gap-2 bg-surface-3 rounded-lg p-2">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center flex-auto">
<code class="small">flex-fill</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center flex-auto">
<code class="small">flex-fill wider text</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center flex-auto">
<code class="small">fill</code>
</div>
</div>
<div class="flex gap-2 bg-surface-3 rounded-lg p-2">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">auto</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center grow">
<code class="small">flex-grow-1</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">auto</code>
</div>
</div>
</div>6Shrink
flex-shrink-0 keeps an item at its size while the other one shrinks.
flex-shrink-0flex-shrink-1 - Free cancellation on most stays means you can book now and decide later.<div class="flex gap-2 bg-surface-3 rounded-lg p-2">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center shrink-0" style="width:140px">
<code class="small">flex-shrink-0</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center shrink truncate">
<code class="small">flex-shrink-1 - Free cancellation on most stays means you can book now and decide later.</code>
</div>
</div>7Auto margins
ms-auto pushes an item and everything after it to the end.
<div class="flex items-center gap-2 border rounded-lg px-4 py-2">
<span class="font-bold">Orbiora</span> <a href="#" class="small link-body-emphasis">Docs</a> <a href="#" class="small link-body-emphasis">Blog</a>
<button type="button" class="btn btn-sm btn-primary ms-auto">Sign in</button>
</div>8Wrap
flex-wrap lets items move to a new line; flex-nowrap keeps one line.
itemitemitemitemitemitemitemitemitemitemitemitemitemitemitemitemitemitemitemitem<div class="grid gap-2">
<div class="flex gap-2 bg-surface-3 rounded-lg p-2 flex-wrap">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
</div>
<div class="flex gap-2 bg-surface-3 rounded-lg p-2 flex-nowrap overflow-x-auto">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">item</code>
</div>
</div>
</div>9Order
order-* changes the visual order without changing the markup.
first in markup, order-3second, order-1third, order-2<div class="flex gap-2 bg-surface-3 rounded-lg p-2">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center order-3">
<code class="small">first in markup, order-3</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center order-1">
<code class="small">second, order-1</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center order-2">
<code class="small">third, order-2</code>
</div>
</div>10Row gap and column gap
row-gap-* and column-gap-* set the two gaps separately.
row-gap-4column-gap-1cdefghijkl<div class="flex flex-wrap gap-y-6 gap-x-1 bg-surface-3 rounded-lg p-2">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">row-gap-4</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">column-gap-1</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">c</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">d</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">e</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">f</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">g</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">h</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">i</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">j</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">k</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">l</code>
</div>
</div>11Responsive direction
flex-column flex-sm-row: a sign-up form stacks on phones and sits in one row from sm.
<div class="flex flex-col sm:flex-row gap-2" style="max-width:30rem">
<label class="sr-only" for="ut-mail-1250">Email</label>
<input id="ut-mail-1250" type="email" class="form-control" placeholder="you@example.com">
<button type="button" class="btn btn-primary whitespace-nowrap">Subscribe</button>
</div>12Media list
Each row is d-flex with an icon box that never shrinks.
- Flexible datesClear prices, honest advice and no surprises along the way.
- Flexible datesWe listen first, then build a plan around what you actually need.
<ul class="list-unstyled mb-0 grid gap-4">
<li class="flex gap-4"><span class="shrink-0 bg-primary-subtle text-primary-ink rounded-lg p-2 text-lg leading-none"><i class="bi bi-lightning-charge-fill" aria-hidden="true"></i></span><div><div class="font-semibold">Flexible dates</div><div class="small text-muted">Clear prices, honest advice and no surprises along the way.</div></div></li>
<li class="flex gap-4"><span class="shrink-0 bg-success-subtle text-success-emphasis rounded-lg p-2 text-lg leading-none"><i class="bi bi-shield-check" aria-hidden="true"></i></span><div><div class="font-semibold">Flexible dates</div><div class="small text-muted">We listen first, then build a plan around what you actually need.</div></div></li>
</ul>13Sticky footer in a card
A flex-column card with flex-grow-1 body keeps the button at the bottom regardless of text length.
Every detail is handled by people who care about getting it right.
OpenWe keep things simple, so you can focus on what matters to you. We measure success by how many travellers come back and tell their friends. Members get room upgrades and late check-out at selected hotels.
Open<div class="row g-3">
<div class="col-6">
<div class="flex flex-col border rounded-lg p-4 h-full">
<div class="font-semibold">
How to travel more responsibly
</div>
<p class="small grow">Every detail is handled by people who care about getting it right.</p>
<a href="#" class="btn btn-sm btn-outline-primary">Open</a>
</div>
</div>
<div class="col-6">
<div class="flex flex-col border rounded-lg p-4 h-full">
<div class="font-semibold">
Hidden beaches of the Mediterranean
</div>
<p class="small grow">We keep things simple, so you can focus on what matters to you. We measure success by how many travellers come back and tell their friends. Members get room upgrades and late check-out at selected hotels.</p>
<a href="#" class="btn btn-sm btn-outline-primary">Open</a>
</div>
</div>
</div>14Align content
align-content-* distributes wrapped lines in a taller container.
align-content-betweenbcdefghij<div class="flex flex-wrap content-between gap-2 bg-surface-3 rounded-lg p-2" style="height:160px">
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">align-content-between</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">b</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">c</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">d</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">e</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">f</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">g</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">h</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">i</code>
</div>
<div class="bg-primary-subtle border border-primary/30 rounded-md p-2 text-center">
<code class="small">j</code>
</div>
</div>15Baseline alignment
align-items-baseline lines up text of different sizes on its baseline.
<div class="flex items-baseline gap-2">
<span class="display-6 font-bold">$27.32</span><span class="text-muted">/ month</span><span class="small text-success-emphasis">billed yearly</span>
</div>16Horizontal stack
hstack is a shortcut for a centred flex row with gap.
<div class="hstack gap-2 border rounded-lg p-2">
<span class="badge text-bg-primary">product</span> <span class="small">Travelling with kids: our tried and tested tips</span>
<div class="vr ms-auto">
</div>
<button type="button" class="btn btn-sm btn-light">Edit</button>
</div>17Vertical stack
vstack is a flex column with gap: quick form or card layouts.
<div class="vstack gap-2 border rounded-lg p-4" style="max-width:20rem">
<div class="font-semibold">
Your perfect holiday, planned for you
</div>
<div class="small text-muted">
Every hotel on our list is visited and reviewed by our own travel team.
</div>
<button type="button" class="btn btn-primary btn-sm">Join waitlist</button>
</div>18Responsive justify
justify-content-center justify-content-md-between centres on phones and spreads from md.
<div class="flex flex-wrap justify-center md:justify-between items-center gap-2 border rounded-lg p-4">
<span class="small text-muted">Showing 1-10 of 42</span>
<div class="flex gap-1">
<button type="button" class="btn btn-sm btn-light border">Prev</button>
<button type="button" class="btn btn-sm btn-light border">Next</button>
</div>
</div>19Equal width columns with flex-fill
Navigation tabs share the row equally with flex-fill and text-center.
<nav class="flex border rounded-lg overflow-hidden" aria-label="Period">
<a href="#" class="flex-auto text-center py-2 text-bg-primary no-underline" aria-current="page">Day</a> <a href="#" class="flex-auto text-center py-2 link-body-emphasis no-underline border-s">Week</a> <a href="#" class="flex-auto text-center py-2 link-body-emphasis no-underline border-s">Month</a> <a href="#" class="flex-auto text-center py-2 link-body-emphasis no-underline border-s">Year</a>
</nav>20Reverse on large screens
flex-column flex-lg-row-reverse: on large screens the image moves to the right.
Find your next escape
Every trip supports local businesses and responsible tourism. Friendly people answer your questions quickly, by phone, chat or email.
<div class="flex flex-col lg:flex-row-reverse gap-4 lg:items-center">
<img src="https://images.unsplash.com/photo-1554366347-897a5113f6ab?auto=format&fit=crop&w=1200&h=800&q=70" alt="Explore more, worry less" class="rounded-xl w-full" style="max-width:20rem">
<div>
<h3 class="h5 font-semibold">Find your next escape</h3>
<p class="small text-muted mb-0">Every trip supports local businesses and responsible tourism. Friendly people answer your questions quickly, by phone, chat or email.</p>
</div>
</div>