Overflow

Overflow utilities control what happens when content is bigger than its box: overflow-auto scrolls when needed, overflow-hidden clips, overflow-visible lets content spill and overflow-scroll always shows scrollbars. overflow-x-* and overflow-y-* handle each axis separately, ideal for wide tables and side-scrolling rows.

1The four overflow values

overflow-auto, overflow-hidden, overflow-visible and overflow-scroll on boxes of fixed height.

overflow-auto

Our recovery spa has a sauna, cold plunge and massage rooms. Friendly people answer your questions quickly, by phone, chat or email. Clear prices, honest advice and no surprises along the way. Start in minutes and get help from a real person whenever you need it.

overflow-hidden

overflow-visible

overflow-scroll

<div class="row g-3 small">
  <div class="col-6 col-md-3">
    <code>overflow-auto</code>
    <div class="overflow-auto border rounded-3 p-2 bg-body-tertiary" style="height:100px">
      Our recovery spa has a sauna, cold plunge and massage rooms. Friendly people answer your questions quickly, by phone, chat or email. Clear prices, honest advice and no surprises along the way. Start in minutes and get help from a real person whenever you need it.
    </div>
  </div>
  <div class="col-6 col-md-3">
    <code>overflow-hidden</code>
    <div class="overflow-hidden border rounded-3 p-2 bg-body-tertiary" style="height:100px">
      Our recovery spa has a sauna, cold plunge and massage rooms. Friendly people answer your questions quickly, by phone, chat or email. Clear prices, honest advice and no surprises along the way. Start in minutes and get help from a real person whenever you need it.
    </div>
  </div>
  <div class="col-6 col-md-3">
    <code>overflow-visible</code>
    <div class="overflow-visible border rounded-3 p-2 bg-body-tertiary mb-5" style="height:100px">
      Our recovery spa has a sauna, cold plunge and massage rooms. Friendly people answer your questions quickly, by phone, chat or email. Clear prices, honest advice and no surprises along the way. Start in minutes and get help from a real person whenever you need it.
    </div>
  </div>
  <div class="col-6 col-md-3">
    <code>overflow-scroll</code>
    <div class="overflow-scroll border rounded-3 p-2 bg-body-tertiary" style="height:100px">
      Our recovery spa has a sauna, cold plunge and massage rooms. Friendly people answer your questions quickly, by phone, chat or email. Clear prices, honest advice and no surprises along the way. Start in minutes and get help from a real person whenever you need it.
    </div>
  </div>
</div>

2Horizontal scroll only

overflow-x-auto with flex-nowrap scrolls a row of cards sideways.

Group classes

Nutrition plans

Group classes

Personal training

<div class="d-flex flex-nowrap gap-2 overflow-x-auto pb-2">
  <div class="border rounded-3 p-3 flex-shrink-0" style="width:160px">
    <div class="fw-semibold small">
      Group classes
    </div>
  </div>
  <div class="border rounded-3 p-3 flex-shrink-0" style="width:160px">
    <div class="fw-semibold small">
      Group classes
    </div>
  </div>
  <div class="border rounded-3 p-3 flex-shrink-0" style="width:160px">
    <div class="fw-semibold small">
      Nutrition plans
    </div>
  </div>
  <div class="border rounded-3 p-3 flex-shrink-0" style="width:160px">
    <div class="fw-semibold small">
      Group classes
    </div>
  </div>
  <div class="border rounded-3 p-3 flex-shrink-0" style="width:160px">
    <div class="fw-semibold small">
      Personal training
    </div>
  </div>
</div>

3Vertical scroll only

overflow-y-auto and a max-height make a scrolling list.

Priya Haddad
Lucas Novak
Nadia Tanaka
Freya Varga
Diego Duarte
Hana Larsen

<ul class="list-unstyled border rounded-3 overflow-y-auto mb-0" style="max-height:150px">
  <li class="px-3 py-2 border-bottom">Priya Haddad</li>
  <li class="px-3 py-2 border-bottom">Lucas Novak</li>
  <li class="px-3 py-2 border-bottom">Nadia Tanaka</li>
  <li class="px-3 py-2 border-bottom">Freya Varga</li>
  <li class="px-3 py-2 border-bottom">Diego Duarte</li>
  <li class="px-3 py-2">Hana Larsen</li>
</ul>

4Hidden to clip rounded corners

overflow-hidden on a rounded card clips the image corners.

without

overflow-hidden

<div class="row g-3">
  <div class="col-6">
    <div class="border rounded-4">
      <img src="https://images.unsplash.com/photo-1517836357463-d25dfeac3438?auto=format&fit=crop&w=1200&h=800&q=70" alt="Not clipped" class="w-100 d-block">
      <div class="p-2 small">
        without
      </div>
    </div>
  </div>
  <div class="col-6">
    <div class="border rounded-4 overflow-hidden">
      <img src="https://images.unsplash.com/photo-1761839258420-5c3e2f2e2a74?auto=format&fit=crop&w=1200&h=800&q=70" alt="Clipped" class="w-100 d-block">
      <div class="p-2 small">
        overflow-hidden
      </div>
    </div>
  </div>
</div>

5Wide table

A wide table inside overflow-x-auto scrolls instead of breaking the page.

Order	Customer	City	Date	Status	Total
#INV-5272	Ava Hughes	Dublin	Sep 5, 2026	Approved	$345.25
#PO-8961	Luna Okafor	Melbourne	Aug 31, 2026	Cancelled	$32.40

<div class="overflow-x-auto border rounded-3">
  <table class="table table-sm mb-0 text-nowrap">
    <thead>
      <tr>
        <th scope="col">Order</th>
        <th scope="col">Customer</th>
        <th scope="col">City</th>
        <th scope="col">Date</th>
        <th scope="col">Status</th>
        <th scope="col">Total</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td>#INV-5272</td>
        <td>Ava Hughes</td>
        <td>Dublin</td>
        <td>Sep 5, 2026</td>
        <td>Approved</td>
        <td>$345.25</td>
      </tr>
      <tr>
        <td>#PO-8961</td>
        <td>Luna Okafor</td>
        <td>Melbourne</td>
        <td>Aug 31, 2026</td>
        <td>Cancelled</td>
        <td>$32.40</td>
      </tr>
    </tbody>
  </table>
</div>

6Code block that scrolls

Long lines in a pre with overflow-x-auto stay on one line.

npm run build -- --mode production --out-dir dist/junoio-kit --base ./ --sourcemap false --emptyOutDir

<pre class="overflow-x-auto bg-body-tertiary border rounded-3 p-3 small mb-0"><code>npm run build -- --mode production --out-dir dist/junoio-kit --base ./ --sourcemap false --emptyOutDir</code></pre>

7Chat window

A fixed height message area with overflow-y-auto above a fixed input.

Certified coaches design every session around your level and your goals.

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

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

Pause or change your membership any time, with no long contracts.

<div class="border rounded-4 d-flex flex-column" style="height:220px;max-width:22rem">
  <div class="overflow-y-auto p-3 d-flex flex-column gap-2 flex-grow-1">
    <div class="align-self-start bg-body-tertiary rounded-3 px-2 py-1 small">
      Certified coaches design every session around your level and your goals.
    </div>
    <div class="align-self-end text-bg-primary rounded-3 px-2 py-1 small">
      We measure success by how many members come back and tell their friends.
    </div>
    <div class="align-self-start bg-body-tertiary rounded-3 px-2 py-1 small">
      We keep things simple, so you can focus on what matters to you.
    </div>
    <div class="align-self-end text-bg-primary rounded-3 px-2 py-1 small">
      Pause or change your membership any time, with no long contracts.
    </div>
  </div>
  <div class="border-top p-2">
    <label class="visually-hidden" for="ut-msg-1253">Message</label>
    <input id="ut-msg-1253" type="text" class="form-control form-control-sm" placeholder="Type a message">
  </div>
</div>

8Scrollable tab strip

Pills in a flex-nowrap row with overflow-x-auto for many categories.

<nav class="d-flex flex-nowrap gap-2 overflow-x-auto pb-1" aria-label="Categories">
  <a href="#" class="btn btn-sm btn-primary rounded-pill text-nowrap">All</a> <a href="#" class="btn btn-sm btn-light border rounded-pill text-nowrap">HIIT</a> <a href="#" class="btn btn-sm btn-light border rounded-pill text-nowrap">insights</a> <a href="#" class="btn btn-sm btn-light border rounded-pill text-nowrap">Yoga</a> <a href="#" class="btn btn-sm btn-light border rounded-pill text-nowrap">tutorial</a> <a href="#" class="btn btn-sm btn-light border rounded-pill text-nowrap">launch</a> <a href="#" class="btn btn-sm btn-light border rounded-pill text-nowrap">powerful</a> 
</nav>

9Terms box

A long text inside a bordered box with overflow-auto, like a licence agreement.

Terms of use

Our team has done this many times, so you never have to guess. Open 24 hours, so you can train whenever it suits your day. Track your progress in the app and see how far you have come.

Beginners are always welcome, with an intro session included. Every detail is handled by people who care about getting it right. Small group classes mean your coach knows your name and your form. Thousands of members already trust us, and we work hard to keep it that way.

Modern equipment is cleaned, serviced and ready every day. Nutrition plans fit your routine and the food you actually enjoy. Pause or change your membership any time, with no long contracts.

<div class="border rounded-3 p-3 overflow-auto small bg-body-tertiary" style="height:130px">
  <h3 class="h6">Terms of use</h3>
  <p>Our team has done this many times, so you never have to guess. Open 24 hours, so you can train whenever it suits your day. Track your progress in the app and see how far you have come.</p>
  <p>Beginners are always welcome, with an intro session included. Every detail is handled by people who care about getting it right. Small group classes mean your coach knows your name and your form. Thousands of members already trust us, and we work hard to keep it that way.</p>
  <p class="mb-0">Modern equipment is cleaned, serviced and ready every day. Nutrition plans fit your routine and the food you actually enjoy. Pause or change your membership any time, with no long contracts.</p>
</div>

10Visible overflow for a badge

overflow-visible lets a badge stick out of a box that would otherwise clip it.

overflow-hidden1

overflow-visible7

<div class="d-flex gap-4 pt-2">
  <div class="position-relative overflow-hidden border rounded-3 p-3 small">
    overflow-hidden<span class="position-absolute top-0 start-100 translate-middle badge rounded-pill text-bg-danger">1</span>
  </div>
  <div class="position-relative overflow-visible border rounded-3 p-3 small">
    overflow-visible<span class="position-absolute top-0 start-100 translate-middle badge rounded-pill text-bg-danger">7</span>
  </div>
</div>

11Hidden overflow for a cropped title

overflow-hidden with a fixed height clips long text to two lines worth of space.

Classes that keep you coming back - Clear prices, honest advice and no surprises along the way.

Feb 2, 2026

<div class="border rounded-3 p-3" style="max-width:20rem">
  <div class="overflow-hidden fw-semibold lh-sm" style="height:2.5em">
    Classes that keep you coming back - Clear prices, honest advice and no surprises along the way.
  </div>
  <div class="small text-body-secondary mt-1">
    Feb 2, 2026
  </div>
</div>

12Sidebar that scrolls separately

The nav column scrolls with overflow-y-auto while the content stays put.

Certified coaches design every session around your level and your goals. Beginners are always welcome, with an intro session included.

<div class="d-flex border rounded-3" style="height:180px">
  <nav class="overflow-y-auto border-end p-2 small flex-shrink-0" style="width:130px" aria-label="Chapters">
    <a href="#" class="d-block py-1">Intro</a><a href="#" class="d-block py-1">Setup</a><a href="#" class="d-block py-1">Layout</a> <a href="#" class="d-block py-1">Colours</a><a href="#" class="d-block py-1">Forms</a><a href="#" class="d-block py-1">Tables</a> <a href="#" class="d-block py-1">Charts</a><a href="#" class="d-block py-1">Deploy</a> 
  </nav>
  <div class="p-3 small">
    Certified coaches design every session around your level and your goals. Beginners are always welcome, with an intro session included.
  </div>
</div>

13Image pan area

A large image in an overflow-auto box can be scrolled in both directions.

<div class="overflow-auto border rounded-3" style="height:160px;max-width:26rem">
  <img src="https://images.unsplash.com/photo-1599058917212-d750089bc07e?auto=format&fit=crop&w=1600&h=700&q=70" alt="What our members asked us most" width="900" height="394" class="d-block"> 
</div>

14Kanban columns

Columns side by side in overflow-x-auto, each column scrolls with overflow-y-auto.

To do

Yoga

Online coaching

Group classes

Doing

Group classes

Done

Group classes

<div class="d-flex gap-2 overflow-x-auto pb-1">
  <div class="bg-body-tertiary rounded-3 p-2 flex-shrink-0 overflow-y-auto" style="width:170px;max-height:180px">
    <div class="small fw-semibold mb-2">
      To do
    </div>
    <div class="bg-body border rounded-2 p-2 small mb-2">
      Yoga
    </div>
    <div class="bg-body border rounded-2 p-2 small mb-2">
      Online coaching
    </div>
    <div class="bg-body border rounded-2 p-2 small">
      Group classes
    </div>
  </div>
  <div class="bg-body-tertiary rounded-3 p-2 flex-shrink-0 overflow-y-auto" style="width:170px;max-height:180px">
    <div class="small fw-semibold mb-2">
      Doing
    </div>
    <div class="bg-body border rounded-2 p-2 small">
      Group classes
    </div>
  </div>
  <div class="bg-body-tertiary rounded-3 p-2 flex-shrink-0 overflow-y-auto" style="width:170px;max-height:180px">
    <div class="small fw-semibold mb-2">
      Done
    </div>
    <div class="bg-body border rounded-2 p-2 small">
      Group classes
    </div>
  </div>
</div>

15Overflow-x hidden

overflow-x-hidden hides content that slides in from the side, like an off-screen panel.

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

Panel partly off the edge

<div class="position-relative overflow-x-hidden border rounded-3 p-3" style="height:110px">
  <div class="small">
    Friendly people answer your questions quickly, by phone, chat or email.
  </div>
  <div class="position-absolute top-0 bg-primary-subtle h-100 p-2 small" style="left:90%;width:200px">
    Panel partly off the edge
  </div>
</div>

16Overflow-y scroll always

overflow-y-scroll always shows the vertical scrollbar, so the width never jumps.

We listen first, then build a plan around what you actually need.

<div class="overflow-y-scroll border rounded-3 p-2 small" style="height:90px">
  We listen first, then build a plan around what you actually need.
</div>

17Notification panel

A dropdown-like panel with header, scrolling body and footer.

Notifications

Small group classes mean your coach knows your name and your form.

Track your progress in the app and see how far you have come.

Community events keep you motivated, from fun runs to workshops.

Every detail is handled by people who care about getting it right.

View all

<div class="border rounded-3 shadow-sm d-flex flex-column" style="max-width:20rem;height:220px">
  <div class="px-3 py-2 border-bottom fw-semibold small">
    Notifications
  </div>
  <div class="overflow-y-auto flex-grow-1">
    <div class="px-3 py-2 border-bottom small">
      Small group classes mean your coach knows your name and your form.
    </div>
    <div class="px-3 py-2 border-bottom small">
      Track your progress in the app and see how far you have come.
    </div>
    <div class="px-3 py-2 border-bottom small">
      Community events keep you motivated, from fun runs to workshops.
    </div>
    <div class="px-3 py-2 small">
      Every detail is handled by people who care about getting it right.
    </div>
  </div>
  <a href="#" class="px-3 py-2 border-top small text-center">View all</a> 
</div>

18Clip a decorative shape

A big circle partly outside its panel is cut off by overflow-hidden.

Stronger every single day

Our recovery spa has a sauna, cold plunge and massage rooms.

<div class="position-relative overflow-hidden text-bg-primary rounded-4 p-4">
  <div class="position-absolute bg-white bg-opacity-25 rounded-circle" style="width:180px;height:180px;right:-60px;top:-60px">
  </div>
  <h3 class="h5 position-relative">Stronger every single day</h3>
  <p class="small mb-0 position-relative">Our recovery spa has a sauna, cold plunge and massage rooms.</p>
</div>

19Long word handling

overflow-hidden plus text-truncate versus text-break for an unbreakable string.

downloads/junoio-kit/assets/very-long-file-name-without-any-spaces-at-all.zip

<div class="row g-2 small">
  <div class="col-sm-6">
    <div class="border rounded-3 p-2 text-truncate">
      downloads/junoio-kit/assets/very-long-file-name-without-any-spaces-at-all.zip
    </div>
  </div>
  <div class="col-sm-6">
    <div class="border rounded-3 p-2 text-break">
      downloads/junoio-kit/assets/very-long-file-name-without-any-spaces-at-all.zip
    </div>
  </div>
</div>

20Responsive table wrapper

table-responsive is the helper made of overflow-x-auto for tables.

Plan	Users	Storage	Support	API	Price
Pro	27	431 GB	Email and chat	Unlimited	$29.69

<div class="table-responsive border rounded-3">
  <table class="table table-sm mb-0 text-nowrap">
    <thead>
      <tr>
        <th scope="col">Plan</th>
        <th scope="col">Users</th>
        <th scope="col">Storage</th>
        <th scope="col">Support</th>
        <th scope="col">API</th>
        <th scope="col">Price</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td>Pro</td>
        <td>27</td>
        <td>431 GB</td>
        <td>Email and chat</td>
        <td>Unlimited</td>
        <td>$29.69</td>
      </tr>
    </tbody>
  </table>
</div>