-
-
Save ramondeklein/27bbff763a160b1850f2 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
(function($){ | |
var hasTouch = /android|iphone|ipad/i.test(navigator.userAgent.toLowerCase()), | |
eventName = hasTouch ? 'touchend' : 'click'; | |
/** | |
* Bind an event handler to the "double tap" JavaScript event. | |
* @param {function} doubleTapHandler | |
* @param {number} [delay=300] | |
*/ | |
$.fn.doubletap = function(doubleTapHandler, delay){ | |
delay = (delay == null) ? 300 : delay; | |
this.bind(eventName, function(event){ | |
var now = new Date().getTime(); | |
// the first time this will make delta a negative number | |
var lastTouch = $(this).data('lastTouch') || now + 1; | |
var delta = now - lastTouch; | |
if(delta < delay && 0 < delta){ | |
// After we detct a doubletap, start over | |
$(this).data('lastTouch', null); | |
if(doubleTapHandler !== null && typeof doubleTapHandler === 'function'){ | |
doubleTapHandler(event); | |
} | |
}else{ | |
$(this).data('lastTouch', now); | |
} | |
}); | |
}; | |
})(jQuery); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment