Stacks

Stacks are flexbox shortcuts: vstack lines items up vertically, hstack horizontally, and the gap utilities space them evenly. Push an item to the far side with ms-auto and separate groups with a vertical rule.

1Horizontal toolbar

hstack with gap-2 lines up buttons; ms-auto pushes the last group to the far end.

<div class="hstack gap-2 p-2 border rounded bg-body-tertiary">
  <button type="button" class="btn btn-sm btn-primary"><i class="bi bi-plus-lg" aria-hidden="true"></i> New</button>
  <button type="button" class="btn btn-sm btn-outline-secondary"><i class="bi bi-upload" aria-hidden="true"></i> Import</button>
  <div class="vr">
  </div>
  <button type="button" class="btn btn-sm btn-light" aria-label="Filter"><i class="bi bi-funnel" aria-hidden="true"></i></button>
  <button type="button" class="btn btn-sm btn-light ms-auto" aria-label="Settings"><i class="bi bi-gear" aria-hidden="true"></i></button>
</div>

2Vertical sign-in form

vstack with gap-3 spaces the fields of a compact form without margin utilities.

<form class="vstack gap-3" style="max-width:22rem">
  <div>
    <label class="form-label" for="hp-email-1236">Email</label>
    <input class="form-control" id="hp-email-1236" type="email" autocomplete="email">
  </div>
  <div>
    <label class="form-label" for="hp-pass-1237">Password</label>
    <input class="form-control" id="hp-pass-1237" type="password" autocomplete="current-password">
  </div>
  <button type="submit" class="btn btn-primary">Sign in</button>
  <a class="small text-center" href="#">Forgot your password?</a> 
</form>

3Profile row

An avatar, a name and role block and a follow button in one hstack.

Mia Silva Marketing Lead · Melbourne

<div class="hstack gap-3 p-3 border rounded">
  <img src="../assets/img/avatar-5.svg" alt="Mia Silva" width="48" height="48" class="rounded-circle"> 
  <div class="vstack gap-0">
    <strong>Mia Silva</strong> <small class="text-body-secondary">Marketing Lead &middot; Melbourne</small> 
  </div>
  <button type="button" class="btn btn-sm btn-outline-primary ms-auto">Follow</button>
</div>

4Notification list

A vstack of notification items, each an hstack of icon, message and time.

You receive photos and updates showing exactly what your donation achieved.

just now

Our team has done this many times, so you never have to guess.

yesterday

We have helped more than two hundred thousand people since we started.

5 hours ago

<div class="vstack gap-2">
  <div class="hstack gap-3 align-items-start p-2 border rounded">
    <span class="text-success fs-5"><i class="bi bi-bag-check" aria-hidden="true"></i></span>
    <div class="small">
      You receive photos and updates showing exactly what your donation achieved.
    </div>
    <small class="ms-auto text-nowrap text-body-secondary">just now</small>
  </div>
  <div class="hstack gap-3 align-items-start p-2 border rounded">
    <span class="text-primary fs-5"><i class="bi bi-chat-left-text" aria-hidden="true"></i></span>
    <div class="small">
      Our team has done this many times, so you never have to guess.
    </div>
    <small class="ms-auto text-nowrap text-body-secondary">yesterday</small>
  </div>
  <div class="hstack gap-3 align-items-start p-2 border rounded">
    <span class="text-warning fs-5"><i class="bi bi-exclamation-triangle" aria-hidden="true"></i></span>
    <div class="small">
      We have helped more than two hundred thousand people since we started.
    </div>
    <small class="ms-auto text-nowrap text-body-secondary">5 hours ago</small>
  </div>
</div>

5Centred button stack

vstack with col-md-5 mx-auto centres full-width buttons, as on a mobile landing screen.

Free for 14 days, no card needed

<div class="vstack gap-2 col-md-5 mx-auto">
  <button type="button" class="btn btn-primary">Create an account</button>
  <button type="button" class="btn btn-outline-secondary">I already have one</button>
  <small class="text-center text-body-secondary">Free for 14 days, no card needed</small> 
</div>

6Stacked feature cards

Cards stacked with vstack gap-3; inside each card an hstack pairs the icon with its text.

Secure giving

A school kit costs less than a cinema ticket and lasts a whole year.

Tax receipts

Friendly people answer your questions quickly, by phone, chat or email.

Volunteer network

Companies can match employee donations and double their impact.

<div class="vstack gap-3">
  <div class="card">
    <div class="card-body hstack gap-3">
      <span class="fs-3 text-primary"><i class="bi bi-shield-check" aria-hidden="true"></i></span>
      <div>
        <h3 class="h6 mb-1">Secure giving</h3>
        <p class="small mb-0">A school kit costs less than a cinema ticket and lasts a whole year.</p>
      </div>
    </div>
  </div>
  <div class="card">
    <div class="card-body hstack gap-3">
      <span class="fs-3 text-primary"><i class="bi bi-lightning" aria-hidden="true"></i></span>
      <div>
        <h3 class="h6 mb-1">Tax receipts</h3>
        <p class="small mb-0">Friendly people answer your questions quickly, by phone, chat or email.</p>
      </div>
    </div>
  </div>
  <div class="card">
    <div class="card-body hstack gap-3">
      <span class="fs-3 text-primary"><i class="bi bi-graph-up" aria-hidden="true"></i></span>
      <div>
        <h3 class="h6 mb-1">Volunteer network</h3>
        <p class="small mb-0">Companies can match employee donations and double their impact.</p>
      </div>
    </div>
  </div>
</div>

7Inline subscribe form

An hstack holding an input, a button and a divider link, a common newsletter pattern.

<form class="hstack gap-2">
  <label class="visually-hidden" for="hp-q-1238">Email address</label>
  <input class="form-control me-auto" id="hp-q-1238" type="email" placeholder="you@example.com"> 
  <button type="submit" class="btn btn-secondary">Subscribe</button>
  <div class="vr">
  </div>
  <button type="reset" class="btn btn-outline-danger">Reset</button>
</form>

8Pricing feature list

A vstack of check-mark rows inside a pricing card.

Business

$44.16 / month

Volunteer network

Secure giving

Impact tracking

Local partners

Tax receipts

<div class="card" style="max-width:22rem">
  <div class="card-body vstack gap-2">
    <h3 class="h5 mb-0">Business</h3>
    <p class="fs-3 fw-bold mb-1">$44.16<small class="fs-6 fw-normal text-body-secondary"> / month</small></p>
    <div class="hstack gap-2">
      <span class="text-success"><i class="bi bi-check-circle-fill" aria-hidden="true"></i></span>Volunteer network
    </div>
    <div class="hstack gap-2">
      <span class="text-success"><i class="bi bi-check-circle-fill" aria-hidden="true"></i></span>Secure giving
    </div>
    <div class="hstack gap-2">
      <span class="text-success"><i class="bi bi-check-circle-fill" aria-hidden="true"></i></span>Impact tracking
    </div>
    <div class="hstack gap-2">
      <span class="text-success"><i class="bi bi-check-circle-fill" aria-hidden="true"></i></span>Local partners
    </div>
    <div class="hstack gap-2">
      <span class="text-success"><i class="bi bi-check-circle-fill" aria-hidden="true"></i></span>Tax receipts
    </div>
    <button type="button" class="btn btn-primary mt-2">Choose plan</button>
  </div>
</div>

9Footer link row

hstack with flex-wrap and gap-3 for a row of footer links that wraps on narrow screens.

<footer class="hstack flex-wrap gap-3 small border-top pt-3">
  <span class="fw-semibold">Lumen Co</span> <a href="#">About</a><a href="#">Careers</a><a href="#">Press</a><a href="#">Help centre</a> <span class="ms-auto text-body-secondary">&copy; 2026</span> 
</footer>

10Chat bubbles

A vstack where align-self-start and align-self-end place incoming and outgoing messages.

We measure success by how many donors come back and tell their friends.

Clear prices, honest advice and no surprises along the way.

Our annual report is independently audited and published in full.

Thousands of donors already trust us, and we work hard to keep it that way.

<div class="vstack gap-2">
  <div class="px-3 py-2 rounded-3 small bg-body-tertiary align-self-start" style="max-width:80%">
    We measure success by how many donors come back and tell their friends.
  </div>
  <div class="px-3 py-2 rounded-3 small text-bg-primary align-self-end" style="max-width:80%">
    Clear prices, honest advice and no surprises along the way.
  </div>
  <div class="px-3 py-2 rounded-3 small bg-body-tertiary align-self-start" style="max-width:80%">
    Our annual report is independently audited and published in full.
  </div>
  <div class="px-3 py-2 rounded-3 small text-bg-primary align-self-end" style="max-width:80%">
    Thousands of donors already trust us, and we work hard to keep it that way.
  </div>
</div>

11Wrapping tag row

hstack plus flex-wrap and gap-1 keeps tags tidy when they run onto a second line.

AnimalsHealthReliefEducationEnvironment

<div class="hstack flex-wrap gap-1">
  <span class="badge rounded-pill text-bg-light border">Animals</span><span class="badge rounded-pill text-bg-light border">Health</span><span class="badge rounded-pill text-bg-light border">Relief</span><span class="badge rounded-pill text-bg-light border">Education</span><span class="badge rounded-pill text-bg-light border">Environment</span>
</div>

12Settings rows

Each setting is an hstack with the label on the left and a switch pushed right with ms-auto.

Email notifications

Dark mode

<div class="vstack border rounded">
  <div class="hstack gap-3 p-3 border-bottom">
    <span class="fs-5 text-primary"><i class="bi bi-envelope" aria-hidden="true"></i></span> 
    <label class="form-check-label" for="hp-switch-1239">Email notifications</label>
    <div class="form-check form-switch ms-auto mb-0">
      <input class="form-check-input" type="checkbox" role="switch" id="hp-switch-1239" checked>
    </div>
  </div>
  <div class="hstack gap-3 p-3">
    <span class="fs-5 text-primary"><i class="bi bi-moon-stars" aria-hidden="true"></i></span> 
    <label class="form-check-label" for="hp-switch-1240">Dark mode</label>
    <div class="form-check form-switch ms-auto mb-0">
      <input class="form-check-input" type="checkbox" role="switch" id="hp-switch-1240">
    </div>
  </div>
</div>

13Stats with dividers

An hstack of figures separated by vertical rules.

1.3k

Clients

748

Projects

4.6

Rating

<div class="hstack gap-3 gap-md-4 p-3 border rounded justify-content-center text-center">
  <div>
    <div class="fs-4 fw-bold">
      1.3k
    </div>
    <small class="text-body-secondary">Clients</small>
  </div>
  <div class="vr">
  </div>
  <div>
    <div class="fs-4 fw-bold">
      748
    </div>
    <small class="text-body-secondary">Projects</small>
  </div>
  <div class="vr">
  </div>
  <div>
    <div class="fs-4 fw-bold">
      4.6
    </div>
    <small class="text-body-secondary">Rating</small>
  </div>
</div>

14Card meta line

An hstack in a card footer for author, date and a like counter.

Inside the shelter: from rescue to new home

We keep things simple, so you can focus on what matters to you.

Lea Fischer·Sep 21, 2025 34

<div class="card" style="max-width:24rem">
  <div class="card-body">
    <h3 class="h6">Inside the shelter: from rescue to new home</h3>
    <p class="small mb-0">We keep things simple, so you can focus on what matters to you.</p>
  </div>
  <div class="card-footer hstack gap-2 small text-body-secondary">
    <img src="../assets/img/avatar-4.svg" alt="" width="24" height="24" class="rounded-circle"> <span>Lea Fischer</span><span>&middot;</span><span>Sep 21, 2025</span> <span class="ms-auto"><i class="bi bi-heart" aria-hidden="true"></i> 34</span> 
  </div>
</div>

15Order timeline

A vstack of steps, each an hstack of status badge and text.

Order placedOct 6, 2026

PackedMay 30, 2026

ShippedMay 15, 2026

DeliveredExpected Nov 11, 2026

<div class="vstack gap-3">
  <div class="hstack gap-3">
    <span class="badge rounded-pill text-bg-success"><i class="bi bi-check-lg" aria-hidden="true"></i></span>
    <div class="vstack">
      <strong class="small">Order placed</strong><small class="text-body-secondary">Oct 6, 2026</small>
    </div>
  </div>
  <div class="hstack gap-3">
    <span class="badge rounded-pill text-bg-success"><i class="bi bi-check-lg" aria-hidden="true"></i></span>
    <div class="vstack">
      <strong class="small">Packed</strong><small class="text-body-secondary">May 30, 2026</small>
    </div>
  </div>
  <div class="hstack gap-3">
    <span class="badge rounded-pill text-bg-success"><i class="bi bi-check-lg" aria-hidden="true"></i></span>
    <div class="vstack">
      <strong class="small">Shipped</strong><small class="text-body-secondary">May 15, 2026</small>
    </div>
  </div>
  <div class="hstack gap-3">
    <span class="badge rounded-pill text-bg-secondary"><i class="bi bi-clock" aria-hidden="true"></i></span>
    <div class="vstack">
      <strong class="small">Delivered</strong><small class="text-body-secondary">Expected Nov 11, 2026</small>
    </div>
  </div>
</div>

16Search bar

An hstack combining a search field, a filter select and a button.

<form class="hstack gap-2 flex-wrap flex-sm-nowrap" role="search">
  <label class="visually-hidden" for="hp-search-1241">Search</label>
  <input class="form-control" id="hp-search-1241" type="search" placeholder="Search education"> 
  <label class="visually-hidden" for="hp-search-1241-type">Type</label>
  <select class="form-select w-auto" id="hp-search-1241-type">
    <option>All</option>
    <option>Recent</option>
  </select>
  <button type="submit" class="btn btn-primary" aria-label="Search"><i class="bi bi-search" aria-hidden="true"></i></button>
</form>

17File rows

Attachment rows with icon, name and size, and a download button aligned right.

report-2026.pdf750 KB

proposal-2025.docx224 KB

budget-2025.xlsx865 KB

<div class="vstack gap-2">
  <div class="hstack gap-3 p-2 border rounded">
    <span class="fs-4 text-danger"><i class="bi bi-filetype-pdf" aria-hidden="true"></i></span>
    <div class="vstack">
      <span class="small fw-semibold">report-2026.pdf</span><small class="text-body-secondary">750 KB</small>
    </div>
    <button type="button" class="btn btn-sm btn-light ms-auto" aria-label="Download report"><i class="bi bi-download" aria-hidden="true"></i></button>
  </div>
  <div class="hstack gap-3 p-2 border rounded">
    <span class="fs-4 text-primary"><i class="bi bi-filetype-docx" aria-hidden="true"></i></span>
    <div class="vstack">
      <span class="small fw-semibold">proposal-2025.docx</span><small class="text-body-secondary">224 KB</small>
    </div>
    <button type="button" class="btn btn-sm btn-light ms-auto" aria-label="Download proposal"><i class="bi bi-download" aria-hidden="true"></i></button>
  </div>
  <div class="hstack gap-3 p-2 border rounded">
    <span class="fs-4 text-success"><i class="bi bi-filetype-xlsx" aria-hidden="true"></i></span>
    <div class="vstack">
      <span class="small fw-semibold">budget-2025.xlsx</span><small class="text-body-secondary">865 KB</small>
    </div>
    <button type="button" class="btn btn-sm btn-light ms-auto" aria-label="Download budget"><i class="bi bi-download" aria-hidden="true"></i></button>
  </div>
</div>

18Nested stacks

A vstack page section whose header is an hstack: stacks nest freely.

Volunteer programs

23 View all

Clean water wells are built with and maintained by local communities.

<section class="vstack gap-3 p-3 border rounded">
  <div class="hstack gap-2">
    <h3 class="h5 mb-0">Volunteer programs</h3>
    <span class="badge text-bg-primary">23</span> <a class="ms-auto small" href="#">View all</a> 
  </div>
  <p class="mb-0 small">Clean water wells are built with and maintained by local communities.</p>
  <div class="hstack gap-2">
    <button type="button" class="btn btn-sm btn-primary">Open</button>
    <button type="button" class="btn btn-sm btn-light">Share</button>
  </div>
</section>

19Gap sizes compared

The same hstack with gap-0, gap-2 and gap-4 to compare spacing.

gap-0

Item

gap-2

Item

gap-4

Item

<div class="vstack gap-3">
  <div>
    <small class="text-body-secondary">gap-0</small>
    <div class="hstack gap-0">
      <div class="p-2 bg-primary-subtle border border-primary-subtle rounded small">
        Item
      </div>
      <div class="p-2 bg-primary-subtle border border-primary-subtle rounded small">
        Item
      </div>
      <div class="p-2 bg-primary-subtle border border-primary-subtle rounded small">
        Item
      </div>
      <div class="p-2 bg-primary-subtle border border-primary-subtle rounded small">
        Item
      </div>
    </div>
  </div>
  <div>
    <small class="text-body-secondary">gap-2</small>
    <div class="hstack gap-2">
      <div class="p-2 bg-primary-subtle border border-primary-subtle rounded small">
        Item
      </div>
      <div class="p-2 bg-primary-subtle border border-primary-subtle rounded small">
        Item
      </div>
      <div class="p-2 bg-primary-subtle border border-primary-subtle rounded small">
        Item
      </div>
      <div class="p-2 bg-primary-subtle border border-primary-subtle rounded small">
        Item
      </div>
    </div>
  </div>
  <div>
    <small class="text-body-secondary">gap-4</small>
    <div class="hstack gap-4">
      <div class="p-2 bg-primary-subtle border border-primary-subtle rounded small">
        Item
      </div>
      <div class="p-2 bg-primary-subtle border border-primary-subtle rounded small">
        Item
      </div>
      <div class="p-2 bg-primary-subtle border border-primary-subtle rounded small">
        Item
      </div>
      <div class="p-2 bg-primary-subtle border border-primary-subtle rounded small">
        Item
      </div>
    </div>
  </div>
</div>

20Responsive stack direction

Stacks are vertical on phones and switch to a row from md with flex-md-row.

PlanVolunteers give their time in schools, shelters and food banks every week.

BuildA school kit costs less than a cinema ticket and lasts a whole year.

LaunchNinety cents of every dollar goes directly to the projects you support.

<div class="vstack flex-md-row gap-3">
  <div class="p-3 border rounded flex-fill">
    <strong class="d-block"><i class="bi bi-pencil" aria-hidden="true"></i> Plan</strong><small>Volunteers give their time in schools, shelters and food banks every week.</small>
  </div>
  <div class="p-3 border rounded flex-fill">
    <strong class="d-block"><i class="bi bi-hammer" aria-hidden="true"></i> Build</strong><small>A school kit costs less than a cinema ticket and lasts a whole year.</small>
  </div>
  <div class="p-3 border rounded flex-fill">
    <strong class="d-block"><i class="bi bi-rocket-takeoff" aria-hidden="true"></i> Launch</strong><small>Ninety cents of every dollar goes directly to the projects you support.</small>
  </div>
</div>