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Swiper Svelte Components

If you are upgrading from Swiper 6 to Swiper 7, check out Migration Guide to Swiper 7
If you are upgrading from Swiper 7 to Swiper 8, check out Migration Guide to Swiper 8

Installation

Swiper Svelte is available only via NPM as a part of the main Swiper library:

  npm i swiper

Usage

swiper/svelte exports 2 components: Swiper and SwiperSlide:

  <Swiper
    spaceBetween={50}
    slidesPerView={3}
    on:slideChange={() => console.log('slide change')}
    on:swiper={(e) => console.log(e.detail[0])}
  >
    <SwiperSlide>Slide 1</SwiperSlide>
    <SwiperSlide>Slide 2</SwiperSlide>
    <SwiperSlide>Slide 3</SwiperSlide>
    <SwiperSlide>Slide 4</SwiperSlide>
    ...
  </Swiper>
  <script>
  // Import Swiper Svelte components
  import { Swiper, SwiperSlide } from 'swiper/svelte';

  // Import Swiper styles
  import 'swiper/css';
  </script>
By default Swiper Svelte uses core version of Swiper (without any additional modules). If you want to use Navigation, Pagination and other modules, you have to install them first.
Here is the list of additional modules imports:
  • Virtual - Virtual Slides module
  • Keyboard - Keyboard Control module
  • Mousewheel - Mousewheel Control module
  • Navigation - Navigation module
  • Pagination - Pagination module
  • Scrollbar - Scrollbar module
  • Parallax - Parallax module
  • FreeMode - Free Mode module
  • Grid - Grid module
  • Manipulation - Slides manipulation module (only for Core version)
  • Zoom - Zoom module
  • Lazy - Lazy module
  • Controller - Controller module
  • A11y - Accessibility module
  • History - History Navigation module
  • HashNavigation - Hash Navigation module
  • Autoplay - Autoplay module
  • EffectFade - Fade Effect module
  • EffectCube - Cube Effect module
  • EffectFlip - Flip Effect module
  • EffectCoverflow - Coverflow Effect module
  • EffectCards - Cards Effect module
  • EffectCreative - Creative Effect module
  • Thumbs - Thumbs module
  <Swiper
    modules={[Navigation, Pagination, Scrollbar, A11y]}
    spaceBetween={50}
    slidesPerView={3}
    navigation
    pagination={{ clickable: true }}
    scrollbar={{ draggable: true }}
    on:slideChange={() => console.log('slide change')}
    on:swiper={(e) => console.log(e.detail[0])}
  >
    <SwiperSlide>Slide 1</SwiperSlide>
    <SwiperSlide>Slide 2</SwiperSlide>
    <SwiperSlide>Slide 3</SwiperSlide>
    <SwiperSlide>Slide 4</SwiperSlide>
    ...
  </Swiper>
  <script>
  // import Swiper core and required modules
  import { Navigation, Pagination, Scrollbar, A11y } from 'swiper';

  import { Swiper, SwiperSlide } from 'swiper/svelte';

  // Import Swiper styles
  import 'swiper/css';
  import 'swiper/css/navigation';
  import 'swiper/css/pagination';
  import 'swiper/css/scrollbar';
  </script>
Note, Swiper Svelte component will create required elements for Navigation, Pagination and Scrollbar if you pass these params without specifying its elements (e.g. without navigation.nextEl, pagination.el, etc.)

Styles

Swiper package contains different sets of CSS, Less and SCSS styles:

  • swiper/css - only core Swiper styles
  • swiper/css/bundle - all Swiper styles including all modules styles (like Navigation, Pagination, etc.)

Modules styles (not required if you already imported bundle styles):

  • swiper/css/a11y - styles required for A11y module
  • swiper/css/autoplay - styles required for Autoplay module
  • swiper/css/controller - styles required for Controller module
  • swiper/css/effect-cards - styles required for Cards Effect module
  • swiper/css/effect-coverflow - styles required for Coverflow Effect module
  • swiper/css/effect-creative - styles required for Creative Effect module
  • swiper/css/effect-cube - styles required for Cube Effect module
  • swiper/css/effect-fade - styles required for Fade Effect module
  • swiper/css/effect-flip - styles required for Flip Effect module
  • swiper/css/free-mode - styles required for Free Mode module
  • swiper/css/grid - styles required for Grid module
  • swiper/css/hash-navigation - styles required for Hash Navigation module
  • swiper/css/history - styles required for History module
  • swiper/css/keyboard - styles required for Keyboard module
  • swiper/css/lazy - styles required for Lazy module
  • swiper/css/manipulation - styles required for Manipulation module
  • swiper/css/mousewheel - styles required for Mousewheel module
  • swiper/css/navigation - styles required for Navigation module
  • swiper/css/pagination - styles required for Pagination module
  • swiper/css/parallax - styles required for Parallax module
  • swiper/css/scrollbar - styles required for Scrollbar module
  • swiper/css/thumbs - styles required for Thumbs module
  • swiper/css/virtual - styles required for Virtual module
  • swiper/css/zoom - styles required for Zoom module

For Less styles replace css with less in imports paths, e.g.:

import 'swiper/less';
import 'swiper/less/navigation';
import 'swiper/less/pagination';

For SCSS styles replace css with scss in imports paths, e.g.:

import 'swiper/scss';
import 'swiper/scss/navigation';
import 'swiper/scss/pagination';

Swiper props

Swiper Svelte component receive all Swiper parameters as component props.

<Swiper
  slidesPerView="{3}"
  spaceBetween="{50}"
  navigation
  pagination
  ...
></Swiper>

Swiper events

Swiper component supports all Swiper events, including additional swiper event that returns swiper instance as soon as possible.

All event arguments will be passed as array and they are accessible in event.detail.
For example:
  <Swiper
    on:swiper={onSwiper}
    on:slideChange={() => console.log('slide change')}
    on:progress={onProgress}
    >
    ...
  </Swiper>
  <script>
    import { Swiper, SwiperSlide } from 'swiper/svelte';

    /* "progress" event emitted with "swiper" and "progress" argumentts */
    const onProgress = (e) => {
      const [swiper, progress] = e.detail;
      console.log(progress);
    }

    /* "swiper" event emitted with "swiper" instance argument */
    const onSwiper = (e) => {
      const [swiper] = e.detail;
      console.log(swiper);
    }
  </script>

SwiperSlide props

PropTypeDefaultDescription
zoombooleanfalseEnables additional wrapper required for zoom mode
virtualIndexnumberActual swiper slide index. Required to be set for virtual slides

SwiperSlide slot data

SwiperSlide component receives the following data object:

  • isActive - true when current slide is active
  • isPrev - true when current slide is the previous from active
  • isNext - true when current slide is the next from active
  • isVisible - true when current slide is visible (watchSlidesProgress Swiper parameter must be enabled)
  • isDuplicate - true when current slide is a duplicate slide (when loop mode enabled) For example:
<Swiper>
  <SwiperSlide let:data="{{ isActive }}">
    <div>Current slide is { isActive ? 'active' : 'not active' }</div>
  </SwiperSlide>
</Swiper>

Slots

Swiper Svelte uses "slots" for content distribution. There are 4 slots available

  • container-start - element will be added to the beginning of swiper-container
  • container-end - element will be added to the end of swiper-container
  • wrapper-start - element will be added to the beginning of swiper-wrapper
  • wrapper-end - element will be added to the end of swiper-wrapper

For example:

<Swiper>
  <SwiperSlide>Slide 1</SwiperSlide>
  <SwiperSlide>Slide 2</SwiperSlide>
  <span slot="container-start">Container Start</span>
  <span slot="container-end">Container End</span>
  <span slot="wrapper-start">Wrapper Start</span>
  <span slot="wrapper-end">Wrapper End</span>
</Swiper>

Will be rendered as:

<div class="swiper">
  <span slot="container-start">Container Start</span>
  <div class="swiper-wrapper">
    <span slot="wrapper-start">Wrapper Start</span>
    <div class="swiper-slide">Slide 1</div>
    <div class="swiper-slide">Slide 2</div>
    <span slot="wrapper-end">Wrapper End</span>
  </div>
  <span slot="container-end">Container End</span>
</div>

Virtual Slides

To implement Virtual Slides we need to:

  • pass array with slides to Swiper's virtual.slides property

  • render slides based on virtualData slot's data. It is also mandatory to pass virtualIndex. virtualData is the object with following properties:

    • offset - slides left/top offset in px
    • from - index of first slide required to be rendered
    • to - index of last slide required to be rendered
    • slides - slides to render
  <Swiper
    modules={[Virtual]}
    spaceBetween={50}
    slidesPerView={3}
    virtual={{ slides: virtualSlides }}
    let:virtualData={{ slides, offset, from }}
  >
    {#each slides as slide, index (from + index)}
      <SwiperSlide
        virtualIndex={from + index}
        style={`left: ${offset}px`}
      >{slide}</SwiperSlide>
    {/each}
  </Swiper>
  <script>
  import { Virtual } from 'swiper';
  import { Swiper, SwiperSlide } from 'swiper/svelte';

  // Create array with 1000 slides
  const virtualSlides = Array.from({ length: 1000 }).map((el, index) => `Slide ${index + 1}`);
  </script>

Controller

Controller requires to pass one Swiper instance to another:

  <!-- Main Swiper -> pass controlled swiper instance -->
  <Swiper
    modules={[Controller]}
    controller={{ control: controlledSwiper }}
    ...
  >
    <!-- ... -->
  </Swiper>

  <!-- Controlled Swiper -> store swiper instance -->
  <Swiper
    modules={[Controller]}
    on:swiper={setControlledSwiper}
    ...
  >
    <!-- ... -->
  </Swiper>
  <script>
    import { Controller } from 'swiper';
    import { Swiper, SwiperSlide } from 'swiper/svelte';

    // store Controller swiper instance
    let controlledSwiper = null;

    const setControlledSwiper = (e) => {
      const [swiper] = e.detail;
      // set Controller swiper instance
      setTimeout(() => {
        controlledSwiper = swiper;
      });
    };
  </script>

For two-way control (when both Swipers control each other) it should be like this:

  <Swiper
    modules={[Controller]}
    on:swiper={setFirstSwiper}
    controller={{ control: secondSwiper }}
    ...
  >
    <!-- ... -->
  </Swiper>

  <Swiper
    modules={[Controller]}
    on:swiper={setSecondSwiper}
    controller={{ control: firstSwiper }}
    ...
  >
    <!-- ... -->
  </Swiper>
  <script>
    import SwiperCore, { Controller } from 'swiper';
    import { Swiper, SwiperSlide } from 'swiper/svelte';

    // store swiper instances
    let firstSwiper = null;
    let secondSwiper = null;

    const setFirstSwiper = (e) => {
      const [swiper] = e.detail;
      setTimeout(() => {
        firstSwiper = swiper;
      });
    };

    const setSecondSwiper = (e) => {
      const [swiper] = e.detail;
      setTimeout(() => {
        secondSwiper = swiper;
      });
    };
  </script>

Thumbs

Same as with controller we need to store thumbs instance and pass it to main gallery:

  <!-- Main Swiper -> pass thumbs swiper instance -->
  <Swiper
    modules={[Thumbs]}
    thumbs={{ swiper: thumbsSwiper }}
    ...
  >
    <!-- ... -->
  </Swiper>

  <!-- Thumbs Swiper -> store swiper instance -->
  <!-- It is also required to set watchSlidesProgress prop -->
  <Swiper
    modules={[Thumbs]}
    watchSlidesProgress
    on:swiper={setThumbsSwiper}
    ...
  >
    <!-- ... -->
  </Swiper>

  <script>
    import { Swiper, SwiperSlide } from 'swiper/svelte';
    import SwiperCore, { Thumbs } from 'swiper';

    // store Thumbs swiper instance
    let thumbsSwiper = null;

    const setThumbsSwiper = (e) => {
      const [swiper] = e.detail;
      // set Thumbs swiper instance
      setTimeout(() => {
        thumbsSwiper = swiper;
      });
    };

  </script>

Effects

The following effects are available:

- Fade
- Cube
- Coverflow
- Flip
- Cards
- Creative

To use effects you have to import and install them first (as all other modules).

You can find running effect demos here.

Full Fade Effect Example

<Swiper modules="{[EffectFade]}" effect="fade">
  <SwiperSlide>Slide 1</SwiperSlide>
  <SwiperSlide>Slide 2</SwiperSlide>
  <SwiperSlide>Slide 3</SwiperSlide>
</Swiper>
<script>
  import { Swiper, SwiperSlide } from 'swiper/svelte';
  import { EffectFade } from 'swiper';

  import 'swiper/css';
  import 'swiper/css/effect-fade';
</script>

What next?

As you see it is really easy to integrate Swiper into your website or app. So here are your next steps: