A responsive & lightweight slider for modern browsers.

  • slendr

Downloads in past


3831.4.15 years ago8 years agoMinified + gzip package size for slendr in KB


Slendr npm npm Build Status JavaScript Style Guide
A responsive & lightweight slider for modern browsers.


  • Written and tested entirely using Typescript.
  • Lightweight (just 2KB gzipped UMD)
  • Responsive (desktop and mobile) by default.
  • Modern browsers only. No more legacy browsers like IE10 or IE11 (but you can find it on v1.3 release).
  • High performance by Lighthouse audit.
  • CSS3 Hardware Acceleration
  • 60fps animation.
  • Progressive images loading.
  • Highly customizable.
  • SASS support.

:tada: View demo on Codepen.


yarn add slendr

npm install slendr --save

The UMD and style builds are also available on unpkg.
<link rel="stylesheet" href="">
<script src=""></script>

You can use the component via window.slendr


Include the base styles:
<link rel="stylesheet" href="">

Styles: It can customize the bases styles via the SCSS file at slendr/dist/slendr.scss.
Define the markup:
<div class="slendr">
  <nav class="slendr-direction">
    <a href="#" class="slendr-prev"><i class="fa fa-angle-left"></i></a>
    <a href="#" class="slendr-next"><i class="fa fa-angle-right"></i></a>

  <nav class="slendr-control"></nav>

  <div class="slendr-slides">
    <section class="slendr-slide" data-slide-src="slide1.jpg"></section>
    <section class="slendr-slide" data-slide-src="slide2.jpg"></section>
    <section class="slendr-slide" data-slide-src="slide3.jpg"></section>

Create the slider:
import { Slendr } from 'slendr'

const myslider = new Slendr({
  slideshow: true

myslider.on('move', (direction, index, element) => console.log(direction))



Name | Type | Default | Description --- | --- | --- | --- container | String | .slendr | The container supports string query selector or HTMLElement. selector | String | .slendr-slides > .slendr-slide | Query selector for slides. animationClass | String | .slendr-animate | Class name for animation used in slider translation. directionNavs | Boolean | true | Display the direction navs (arrow buttons). directionNavPrev | String | .slendr-prev | Class name for previous arrow button. directionNavNext | String | .slendr-next | Class name for next arrow button. slideVisibleClass | String | .slendr-visible | Class name used for show the current slide. slideActiveClass | String | .slendr-active | Class name used when some slide is active. slideshow | Boolean | true | If slider should work like a slideshow. slideshowSpeed | Int | 4000 | The slideshow speed (in milliseconds). keyboard | Boolean | false | Activate the keyboard arrow navigation. controlNavs | Boolean | true | Display the control navigation. controlNavClass | Boolean | .slendr-control | Class name of control navigation. controlNavClassActive | Boolean | .slendr-control-active | Class name for active control navigation.
Animation speed: It's defined via the animation class at style.scss. Feel free to use your own CSS timing function.


Name | Usage | Description --- | --- | --- prev | slendr.prev() | Move to previous slide. next | | Move to next slide. move | slendr.move(index) | Move the slider by index. play | | Play the slideshow. pause | slendr.pause() | Pause the slideshow.


Name | Usage | Description --- | --- | --- move | slendr.on('move', (direction, index, element) => {}) | Trigger when slider moves to previous or next slide. prev | slendr.on('prev', (index, element) => {}) | Trigger when slider moves to previous slide. next | slendr.on('next', (index, element) => {}) | Trigger when slider moves to next slide. play | slendr.on('play', (index) => {}) | Trigger when play the slideshow. pause | slendr.on('pause', (index) => {}) | Trigger when pause the slideshow.


On demand attributes

These attributes can be created manually.
data-slide-src: Set the image source URL. After image loading, Slendr will place it as slide background via css background-image.
Slender doesn't depend on images necessarily to working. It can omit this attribute in any case.
<div class="slendr-slides">
  <section class="slendr-slide" data-slide-src="image1.jpg"></section>
  <section class="slendr-slide"></section>
  <section class="slendr-slide" data-slide-src="image2.jpg"></section>

Runtime attributes

These attributes are created by Slendr.
data-slides-length: Contains the length of slides.
<div class="slendr" data-slides-length="1000">...</div>

data-slide-index: Contains the slide index.
<section class="slendr-slide" data-slide-index="0" data-slide-src="image1.jpg">...</section>
<section class="slendr-slide" data-slide-index="1" data-slide-src="image2.jpg">...</section>

Browser support

  • Firefox
  • Chrome
  • Edge
  • Safari, iOS Safari


yarn start


Pull requests or issues are very appreciated.


MIT license
© 2018 José Luis Quintana