React Swipeable

React swipe event handler component & hook

Github Pages Demo

Api

Use React-hooks or a Component and set your swipe(d) handlers.

import { useSwipeable, Swipeable } from 'react-swipeable'

Hook

const handlers = useSwipeable({ onSwiped: (eventData) => eventHandler, ...config })
return (<div {...handlers}> You can swipe here </div>)

Spread handlers onto the element you wish to track swipes inside of. Details below.

Component

<Swipeable onSwiped={(eventData) => eventHandler} {...config} >
  You can swipe here!
</Swipeable>

The Component <Swipeable> uses a <div> by default under the hood to attach event handlers to.

Props / Config Options

Event Handler Props

{
  onSwiped,          // Fired after any swipe
  onSwipedLeft,      // Fired after LEFT swipe
  onSwipedRight,     // Fired after RIGHT swipe
  onSwipedUp,        // Fired after UP swipe
  onSwipedDown,      // Fired after DOWN swipe
  onSwiping,         // Fired during any swipe
}

Event data

All Event Handlers are called with the below event data.

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

Configuration Props

{
  delta: 10,                             // min distance(px) before a swipe starts
  preventDefaultTouchmoveEvent: false,   // preventDefault on touchmove, *See Details*
  trackTouch: true,                      // track touch input
  trackMouse: false,                     // track mouse input
  rotationAngle: 0,                      // set a rotation angle
}

Component Specific Props

{
  nodeName: 'div',    // internally rendered component dom node
  innerRef            // callback ref for internal component dom node
}

None of the props/config options are required.

Hook details

• Hook use requires react >= 16.8.0
• The props contained in handlers are currently ref and onMouseDown
  • Please spread handlers as the props contained in it could change as react improves event listening capabilities
    • See #127 for some more context

preventDefaultTouchmoveEvent Details

preventDefaultTouchmoveEvent prevents the browser's touchmove event. Use this to stop the browser from scrolling while a user swipes.

• e.preventDefault() is only called when:
  • preventDefaultTouchmoveEvent: true
  • trackTouch: true
  • the users current swipe has an associated onSwiping or onSwiped handler/prop

Example:

• If a user is swiping right with <Swipable onSwipedRight={this.userSwipedRight} preventDefaultTouchmoveEvent={true} > then e.preventDefault() will be called, but if the user was swiping left then e.preventDefault() would not be called.

Please experiment with the example to test preventDefaultTouchmoveEvent.

passive listener issue

At the moment, the lighthouse audit is deducting 7 points from the best practices metric for "Does not use passive listeners to improve scrolling performance".

This will not affect behavior in the application, merely the score on the lighthouse audit.

This is currently being tracked in issue 167.

Version 5 Updates

React hooks have been released with 16.8.0 🎉

v5 of react-swipeable includes a hook, useSwipeable, that provides the same great functionality as <Swipeable>. See the useSwipeable hook in action with this codesandbox.

The component is still included and migration to v5 is straightforward. Please see the migration doc for more details including more info on the simplified api.

Development

Initial set up, with node 10+, run npm install.

Make changes/updates to the src/index.js file.

Please add tests if PR adds/changes functionality.

Verify updates with the examples

Build, run, and test examples locally: npm run start:examples

After the server starts you can then view the examples page with your changes at http://localhost:3000.

You can now make updates/changes to src/index.js and webpack will rebuild, then reload the page so you can test your changes!

License

MIT