Offcanvas

Byggðu faldar hliðarstikur inn í verkefnið þitt fyrir siglingar, innkaupakörfur og fleira með nokkrum flokkum og JavaScript viðbótinni okkar.

Á þessari síðu

Hvernig það virkar

Offcanvas er hliðarstikuhluti sem hægt er að skipta um með JavaScript til að birtast frá vinstri, hægri eða neðri brún útsýnisgluggans. Hnappar eða akkeri eru notuð sem kveikjar sem eru tengdir tilteknum þáttum sem þú skiptir um og dataeiginleikar eru notaðir til að kalla fram JavaScript okkar.

Offcanvas deilir sumum af sama JavaScript kóða og modals. Hugmyndalega eru þau nokkuð lík, en þau eru aðskilin viðbætur.
Að sama skapi eru sumar Sass breytur upprunalega fyrir stíla og víddir offcanvas erft frá breytum modalsins.
Þegar það er sýnt inniheldur offcanvas sjálfgefna bakgrunn sem hægt er að smella á til að fela offcanvas.
Svipað og með formúlum er aðeins hægt að sýna einn offcanvas í einu.

Höfuð upp! Í ljósi þess hvernig CSS meðhöndlar hreyfimyndir geturðu ekki notað margineða translateá .offcanvasfrumefni. Í staðinn skaltu nota bekkinn sem sjálfstæðan umbúðaþátt.

Hreyfiáhrif þessa íhluts eru háð prefers-reduced-motionmiðlunarfyrirspurninni. Sjá kaflann um minni hreyfingu í aðgengisskjölunum okkar .

Dæmi

Offcanvas íhlutir

Hér að neðan er dæmi utan striga sem er sjálfgefið sýnt (í gegnum .showá .offcanvas). Offcanvas inniheldur stuðning fyrir haus með lokunarhnappi og valfrjálsan líkamsflokk fyrir upphafsstafi padding. Við mælum með því að þú hafir offcanvas hausa með afvísunaraðgerðum þegar mögulegt er, eða gefðu upp skýra frávísunaraðgerð.

Efni fyrir offcanvas fer hér. Þú getur sett nánast hvaða Bootstrap íhlut eða sérsniðna þætti hér.

<div class="offcanvas offcanvas-start" tabindex="-1" id="offcanvas" aria-labelledby="offcanvasLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasLabel">Offcanvas</h5>
    <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    Content for the offcanvas goes here. You can place just about any Bootstrap component or custom elements here.
  </div>
</div>

Sýning í beinni

Notaðu hnappana hér að neðan til að sýna og fela offcanvas frumefni í gegnum JavaScript sem skiptir .showbekknum á frumefni með .offcanvasbekknum.

.offcanvasfelur efni (sjálfgefið)
.offcanvas.showsýnir efni

Þú getur notað tengil með hrefeigindinni eða hnapp með data-bs-targeteigindinni. Í báðum tilvikum data-bs-toggle="offcanvas"er krafist.

Tengill við href

Einhver texti sem staðgengill. Í raunveruleikanum geturðu haft þá þætti sem þú hefur valið. Eins og, texti, myndir, listar osfrv.

<a class="btn btn-primary" data-bs-toggle="offcanvas" href="#offcanvasExample" role="button" aria-controls="offcanvasExample">
  Link with href
</a>
<button class="btn btn-primary" type="button" data-bs-toggle="offcanvas" data-bs-target="#offcanvasExample" aria-controls="offcanvasExample">
  Button with data-bs-target
</button>

<div class="offcanvas offcanvas-start" tabindex="-1" id="offcanvasExample" aria-labelledby="offcanvasExampleLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasExampleLabel">Offcanvas</h5>
    <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    <div>
      Some text as placeholder. In real life you can have the elements you have chosen. Like, text, images, lists, etc.
    </div>
    <div class="dropdown mt-3">
      <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton" data-bs-toggle="dropdown">
        Dropdown button
      </button>
      <ul class="dropdown-menu" aria-labelledby="dropdownMenuButton">
        <li><a class="dropdown-item" href="#">Action</a></li>
        <li><a class="dropdown-item" href="#">Another action</a></li>
        <li><a class="dropdown-item" href="#">Something else here</a></li>
      </ul>
    </div>
  </div>
</div>

Staðsetning

Það er engin sjálfgefin staðsetning fyrir hluti utan striga, svo þú verður að bæta við einum af breytingaflokkunum hér að neðan;

.offcanvas-startsetur utan striga vinstra megin við útsýnisgluggann (sýnt hér að ofan)
.offcanvas-endsetur offcanvas hægra megin við útsýnisgáttina
.offcanvas-topsetur offcanvas efst á útsýnisglugganum
.offcanvas-bottomsetur offcanvas neðst á útsýnisglugganum

Prófaðu efstu, hægri og neðstu dæmin hér að neðan.

...

<button class="btn btn-primary" type="button" data-bs-toggle="offcanvas" data-bs-target="#offcanvasTop" aria-controls="offcanvasTop">Toggle top offcanvas</button>

<div class="offcanvas offcanvas-top" tabindex="-1" id="offcanvasTop" aria-labelledby="offcanvasTopLabel">
  <div class="offcanvas-header">
    <h5 id="offcanvasTopLabel">Offcanvas top</h5>
    <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    ...
  </div>
</div>

...

<button class="btn btn-primary" type="button" data-bs-toggle="offcanvas" data-bs-target="#offcanvasRight" aria-controls="offcanvasRight">Toggle right offcanvas</button>

<div class="offcanvas offcanvas-end" tabindex="-1" id="offcanvasRight" aria-labelledby="offcanvasRightLabel">
  <div class="offcanvas-header">
    <h5 id="offcanvasRightLabel">Offcanvas right</h5>
    <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    ...
  </div>
</div>

...

<button class="btn btn-primary" type="button" data-bs-toggle="offcanvas" data-bs-target="#offcanvasBottom" aria-controls="offcanvasBottom">Toggle bottom offcanvas</button>

<div class="offcanvas offcanvas-bottom" tabindex="-1" id="offcanvasBottom" aria-labelledby="offcanvasBottomLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasBottomLabel">Offcanvas bottom</h5>
    <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body small">
    ...
  </div>
</div>

Baksvið

Slökkt er á því að fletta frumefninu þegar offcanvas <body>og bakgrunnur hans er sýnilegur. Notaðu data-bs-scrolleigindina til að skipta um <body>skrun og data-bs-backdroptil að skipta um bakgrunn.

Prófaðu að fletta restinni af síðunni til að sjá þennan valkost í aðgerð.

.....

Prófaðu að fletta restinni af síðunni til að sjá þennan valkost í aðgerð.

<button class="btn btn-primary" type="button" data-bs-toggle="offcanvas" data-bs-target="#offcanvasScrolling" aria-controls="offcanvasScrolling">Enable body scrolling</button>
<button class="btn btn-primary" type="button" data-bs-toggle="offcanvas" data-bs-target="#offcanvasWithBackdrop" aria-controls="offcanvasWithBackdrop">Enable backdrop (default)</button>
<button class="btn btn-primary" type="button" data-bs-toggle="offcanvas" data-bs-target="#offcanvasWithBothOptions" aria-controls="offcanvasWithBothOptions">Enable both scrolling & backdrop</button>

<div class="offcanvas offcanvas-start" data-bs-scroll="true" data-bs-backdrop="false" tabindex="-1" id="offcanvasScrolling" aria-labelledby="offcanvasScrollingLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasScrollingLabel">Colored with scrolling</h5>
    <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    <p>Try scrolling the rest of the page to see this option in action.</p>
  </div>
</div>
<div class="offcanvas offcanvas-start" tabindex="-1" id="offcanvasWithBackdrop" aria-labelledby="offcanvasWithBackdropLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasWithBackdropLabel">Offcanvas with backdrop</h5>
    <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    <p>.....</p>
  </div>
</div>
<div class="offcanvas offcanvas-start" data-bs-scroll="true" tabindex="-1" id="offcanvasWithBothOptions" aria-labelledby="offcanvasWithBothOptionsLabel">
  <div class="offcanvas-header">
    <h5 class="offcanvas-title" id="offcanvasWithBothOptionsLabel">Backdrop with scrolling</h5>
    <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
  </div>
  <div class="offcanvas-body">
    <p>Try scrolling the rest of the page to see this option in action.</p>
  </div>
</div>

Aðgengi

Since the offcanvas panel is conceptually a modal dialog, be sure to add aria-labelledby="..."—referencing the offcanvas title—to .offcanvas. Note that you don’t need to add role="dialog" since we already add it via JavaScript.

Sass

Variables

$offcanvas-padding-y:               $modal-inner-padding;
$offcanvas-padding-x:               $modal-inner-padding;
$offcanvas-horizontal-width:        400px;
$offcanvas-vertical-height:         30vh;
$offcanvas-transition-duration:     .3s;
$offcanvas-border-color:            $modal-content-border-color;
$offcanvas-border-width:            $modal-content-border-width;
$offcanvas-title-line-height:       $modal-title-line-height;
$offcanvas-bg-color:                $modal-content-bg;
$offcanvas-color:                   $modal-content-color;
$offcanvas-box-shadow:              $modal-content-box-shadow-xs;
$offcanvas-backdrop-bg:             $modal-backdrop-bg;
$offcanvas-backdrop-opacity:        $modal-backdrop-opacity;

Usage

The offcanvas plugin utilizes a few classes and attributes to handle the heavy lifting:

.offcanvas hides the content
.offcanvas.show shows the content
.offcanvas-start hides the offcanvas on the left
.offcanvas-end hides the offcanvas on the right
.offcanvas-bottom hides the offcanvas on the bottom

Add a dismiss button with the data-bs-dismiss="offcanvas" attribute, which triggers the JavaScript functionality. Be sure to use the <button> element with it for proper behavior across all devices.

Via data attributes

Toggle

Add data-bs-toggle="offcanvas" and a data-bs-target or href to the element to automatically assign control of one offcanvas element. The data-bs-target attribute accepts a CSS selector to apply the offcanvas to. Be sure to add the class offcanvas to the offcanvas element. If you’d like it to default open, add the additional class show.

Dismiss

Dismissal can be achieved with the data attribute on a button within the offcanvas as demonstrated below:

<button type="button" class="btn-close" data-bs-dismiss="offcanvas" aria-label="Close"></button>

or on a button outside the offcanvas using the data-bs-target as demonstrated below:

<button type="button" class="btn-close" data-bs-dismiss="offcanvas" data-bs-target="#my-offcanvas" aria-label="Close"></button>

While both ways to dismiss an offcanvas are supported, keep in mind that dismissing from outside an offcanvas does not match the WAI-ARIA modal dialog design pattern. Do this at your own risk.

Via JavaScript

Enable manually with:

var offcanvasElementList = [].slice.call(document.querySelectorAll('.offcanvas'))
var offcanvasList = offcanvasElementList.map(function (offcanvasEl) {
  return new bootstrap.Offcanvas(offcanvasEl)
})

Options

Options can be passed via data attributes or JavaScript. For data attributes, append the option name to data-bs-, as in data-bs-backdrop="".

Name	Type	Default	Description
`backdrop`	boolean	`true`	Apply a backdrop on body while offcanvas is open
`keyboard`	boolean	`true`	Closes the offcanvas when escape key is pressed
`scroll`	boolean	`false`	Allow body scrolling while offcanvas is open

Methods

Asynchronous methods and transitions

All API methods are asynchronous and start a transition. They return to the caller as soon as the transition is started but before it ends. In addition, a method call on a transitioning component will be ignored.

See our JavaScript documentation for more information.

Activates your content as an offcanvas element. Accepts an optional options object.

You can create an offcanvas instance with the constructor, for example:

var myOffcanvas = document.getElementById('myOffcanvas')
var bsOffcanvas = new bootstrap.Offcanvas(myOffcanvas)

Method	Description
`toggle`	Toggles an offcanvas element to shown or hidden. Returns to the caller before the offcanvas element has actually been shown or hidden (i.e. before the `shown.bs.offcanvas` or `hidden.bs.offcanvas` event occurs).
`show`	Shows an offcanvas element. Returns to the caller before the offcanvas element has actually been shown (i.e. before the `shown.bs.offcanvas` event occurs).
`hide`	Hides an offcanvas element. Returns to the caller before the offcanvas element has actually been hidden (i.e. before the `hidden.bs.offcanvas` event occurs).
`getInstance`	Static method which allows you to get the offcanvas instance associated with a DOM element
`getOrCreateInstance`	Static method which allows you to get the offcanvas instance associated with a DOM element, or create a new one in case it wasn’t initialized

Events

Bootstrap’s offcanvas class exposes a few events for hooking into offcanvas functionality.

Event type	Description
`show.bs.offcanvas`	This event fires immediately when the `show` instance method is called.
`shown.bs.offcanvas`	This event is fired when an offcanvas element has been made visible to the user (will wait for CSS transitions to complete).
`hide.bs.offcanvas`	This event is fired immediately when the `hide` method has been called.
`hidden.bs.offcanvas`	This event is fired when an offcanvas element has been hidden from the user (will wait for CSS transitions to complete).

var myOffcanvas = document.getElementById('myOffcanvas')
myOffcanvas.addEventListener('hidden.bs.offcanvas', function () {
  // do something...
})

Offcanvas

Hvernig það virkar

Dæmi

Offcanvas íhlutir

Offcanvas

Sýning í beinni

Offcanvas

Staðsetning

Offcanvas toppur

Offcanvas hægri

Botn úr striga

Baksvið

Litað með því að fletta

Offcanvas með bakgrunni

Bakgrunnur með því að fletta

Aðgengi

Sass

Variables

Usage

Via data attributes

Toggle

Dismiss

Via JavaScript

Options

Methods

Asynchronous methods and transitions

Events