@react2svelte/swipeable

An action to emit swipe and tap events on an element, based on react-swipeable v7.0.0. Many thanks to all the contributors of that package for their hard work!

This package provides a Svelte Action called swipeable to attach to any DOM element to react to swipe events.

Quickstart

Install the library

npm i @react2svelte/swipeable

And add it to your component

<script lang="ts">
  import { swipeable } from '@react2svelte/swipeable';
  import type { SwipeEventData } from '@react2svelte/swipeable';
  // ...

  function handler(e: CustomEvent<SwipeEventData>) {
    console.log('User swiped!', e.detail);
  }

</script>

<div
  use:swipeable  <!-- use the action -->
  on:swiped={handler} <!-- set a handler for the swiped event -->
/>

Type hints on the events

Add the following line to your app.d.ts file

/// <reference types="@react2svelte/swipeable" />

(There should already be a line with /// <reference types="@sveltejs/kit" />)

Emitted events

The swipeable action emits 10 new events:

General swipe events

• swipedstart - emitted once, at the beginning of a swipe
• swiping - emitted continuously as the user is swiping
• swiped - emitted once the swipe is complete

Directional swipe events. These are like swiped but for specific directions only

• swipedup - User swiped up.
• swipeddown - User swiped down.
• swipedleft - User swiped left.
• swipedright - User swiped right.

Tap events

• tap

Passthrough events

• touchstartormousedown
• touchendormouseup

Configuration

This library is based on react-swipeable, and all the same configuration options and default values apply. Configration can be set by passing an object to use declation:

<div
  use:swipeable={{
    delta: 10,                             // min distance(px) before a swipe starts. *See Notes*
    preventScrollOnSwipe: false,           // prevents scroll during swipe (*See Details*)
    trackTouch: true,                      // track touch input
    trackMouse: false,                     // track mouse input
    rotationAngle: 0,                      // set a rotation angle
    swipeDuration: Infinity,               // allowable duration of a swipe (ms). *See Notes*
    touchEventOptions: { passive: true },  // options for touch listeners (*See Details*)
    }}
/>

Please have a look at the react-swipeable documentation for additional information.

Swipe event data

All Event Handlers are called with the below event data, SwipeEventData.

{
  event,          // source event
  initial,        // initial swipe [x,y]
  first,          // true for the first event of a tracked swipe
  deltaX,         // x offset (current.x - initial.x)
  deltaY,         // y offset (current.y - initial.y)
  absX,           // absolute deltaX
  absY,           // absolute deltaY
  velocity,       // √(absX^2 + absY^2) / time - "absolute velocity" (speed)
  vxvy,           // [ deltaX/time, deltaY/time] - velocity per axis
  dir,            // direction of swipe (Left|Right|Up|Down)
}

Alternative: svelte-gestures

svelte-gestures provides pinch, pan and rotate gestures besides swiping and tapping. However, there is no support for the swiping functionality of swipeable, which provides continuous updates as the user is swiping, rather than just a final event ones the swipe is complete.

For the user it can be helpful to get visual feedback as they are swiping - for example and image in a gallery - and see the image move as they are swiping, not just once at the end of their swipe.

License

MIT