jQuery tap & gestures, fingers in the nose.
Finger unifies click and touch events by removing the 300ms delay on touch devices. It also provides a common
set of events to handle basic gestures such as flick, drag, press and double tap.
Very small (< 0.5kb gzipped), it is focused on performance and KISS, is well tested and also supports jQuery delegated events.
In your web page:
Finger focuses on one finger events:
| tap | doubletap | press | drag | flick |
----------|-----|-----------|-------|------|-------| Available | ✔ | ✔ | ✔ | ✔ | ✔ |
You can tweak how Finger handles events by modifying thresholds found in the
This is the time the user will have to hold in order to fire a
If this time is not reached, a
tap event will be fired instead.
This defaults to
This is the maximum time between two
tap events to fire a
If this time is reached, two distinct
tap events will be fired instead.
This defaults to
This is the maximum time the user will have to swipe in order to fire a
If this time is reached, only
drag events will continue to be fired.
This defaults to
This is the number of pixel the user will have to move in order to fire motion events (drag or flick).
If this time is not reached, no motion will be handled and
press event will be fired.
This defaults to
Additional event parameters
Finger enhances the default event object when there is motion (drag & flick). It gives information about the pointer position and motion:
- x: the
- y: the
- dx: this
xdelta (amount of pixels moved) since the last event.
- dy: this
ydelta since the last event.
- adx: this
xabsolute delta since the last event.
- ady: this
yabsolute delta since the last event.
horizontal: motion was detected as an horizontal one. This can be tweaked with
vertical: motion was detected as a vertical one. This can be tweaked with
1: motion has a positive direction, either left to right for horizontal, or top to bottom for vertical.
-1: motion has a negative direction, either right to left for horizontal, or bottom to top for vertical.
trueif motion has stopped, else
Prevent default behavior
There are three ways of preventing default behavior.
You can prevent every native behavior globally:
$FingerpreventDefault = true;
You can prevent default behavior, just like any other standard events:
Note that if you bind multiple events of the same type on the same element, and one of them is preventing default, every trigger of that event will implicitly prevent default of other bound events.
press event can only be prevented globally, not specifically.
Internally Finger binds a global
mouse event to do its duty. This native event can be accessed via
e.originalEvent property. This is a shared event, that means that this will be the same object across all your
With this original event you are able to decide how you want to prevent default behavior by adding any logic in any of your handlers.
This is an example on how to prevent horizontal scrolling, but not vertical:
This is how Finger prevents default behavior:
| tap | doubletap | press | drag | flick | globally |
------------------------|-----|-----------|-------|------|-------|----------| touchstart / mousedown | | | | | | ✔ | touchmove / mousemove | | | | ✔ | ✔ | | touchend / mouseup | ✔ | ✔ | | ✔ | ✔ | |
Remove the 300ms delay on every links of your page
Delegated events for dynamically loaded elements (AJAX):
Swipe to reveal
- Finger uses VirtualPointer in its test suite to simulate mouse and touch events.
- On Chrome 25+,
preventDefaultdoes not work as expected because
ontouchstartis defined. To make it work, you have to manually prevent the default behavior in the
- When using
dragevent on an image, you have to set
user-drag: noneon it (and the prefixed versions).
Projects using Finger
- Webplate: http://getwebplate.com
v0.1.6 - improve press event handling (#49). v0.1.5 - ignore non-left mouse clicks (#48). v0.1.4 - up to date jQuery dependency for Bower (#45). v0.1.3 - added explicit methods for each event (#28). v0.1.2 - fixed dragging across children of an element (#10). v0.1.1 - fixed `preventDefault` on desktop browsers for `tap` and `doubletap` events (#24). v0.1.0 - stable release. v0.1.0-beta.2 - fixed Chrome desktop and false positive touch detection. - fixed drag events with a correct end flag value (#17). v0.1.0-beta.1 (buggy) - fixed successive taps to fail on different elements. v0.1.0-beta (buggy) - better prevent default logic (#9, #12). - huge internal refactoring. v0.1.0-alpha.1 - give access to original events (#12). v0.1.0-alpha - ie8 legacy support. - fixed prevent default event parameter. v0.0.11 - `press` event is now fired by `timeout` instead of `touchend`. v0.0.10 - fixed events fired multiple times (#1). - added `preventDefault` support. - internal refactoring for size and performance. v0.0.9 - fixed incorrect event type. - added to jam. - added to bower. v0.0.8 - fixed bugs on delegated events. - better cross-browser support (still needs some work/tests). - internal refactoring for consistency and performance. v0.0.7 - various cross browsers fixes. v0.0.6 - updated description. v0.0.5 - updated jquery manifest and published on http://plugins.jquery.com. v0.0.4 - added `drag` and `flick` gestures. - enhanced `event` object. - internal refactoring for consistency. v0.0.3 - migration to **grunt** 0.4. - migration to **mocha** / **chaijs** for tests. v0.0.2 - added `doubletap` and `press` gestures. - internal refactoring for consistency and performance. v0.0.1 - `tap` gesture first implementation.