ReactJS / HammerJS integration. Support touch events in your React app.

If you're looking for native tap event handling in ReactJS, check out my react-tappable package.

The easiest way to use React-HammerJS is to install it from NPM and include it in your own React build process (using Browserify, etc).

You can also use the standalone build by including dist/hammer.js in your page. If you use this, make sure you have already included React, and it is available as a global variable.

npm install react-hammerjs --save

React-HammerJS wraps a React component, binding Hammer events to it so it can fire the handlers specified.

• onTap
• onDoubleTap
• onPan
• onPanCancel
• onPanEnd
• onPanStart
• onPinch
• onPinchCancel
• onPinchEnd
• onPinchIn
• onPinchOut
• onPinchStart
• onPress
• onPressUp
• onRotate
• onRotateCancel
• onRotateEnd
• onRotateMove
• onRotateStart
• onSwipe
• action - like the onTap event handler but will also be fired onPress.

• direction - (string) 'DIRECTION_ALL' | 'DIRECTION_HORIZONTAL' | 'DIRECTION_VERTICAL'. Used to restrict the pan and swipe direction. These string values may also work: 'DIRECTION_NONE' |'DIRECTION_LEFT' | 'DIRECTION_RIGHT' | 'DIRECTION_UP' | 'DIRECTION_DOWN'.

• options - can be used to configure the Hammer manager. These properties will be merged with the default ones.

var Hammer = require('react-hammerjs');

// Default options
<Hammer onTap={handleTap} onSwipe={handleSwipe}><div>Tap Me</div></Hammer>

// Custom options
var options = {
    touchAction:'compute',
    recognizers: {
        tap: {
            time: 600,
            threshold: 100
        }
    }
};

<Hammer onTap={handleTap} options={options}><div>Tap Me</div></Hammer>

As a default, the pinch and rotate events are disabled in hammer.js, as they would make actions on an element "blocking". You may enable these events using the options object which is a attribute on the react <Hammer> element.

For example, to activate the pinch event on a canvas element:

<Hammer
    onPinch={handlePinch}
    options={{
       recognizers: {
          pinch: { enable: true }
       }
    }}>
    <canvas></canvas>
</Hammer>

Disabled events are detailed in the hammer.js api documentation:

• http://hammerjs.github.io/recognizer-rotate/
• http://hammerjs.github.io/recognizer-pinch/

MIT Licensed. Copyright (c) Jed Watson 2017.