swipe-listener/dist/swipe-listener.min.js

Zero-dependency, minimal swipe-gesture listener for the web.

'use strict';var _extends=Object.assign||function(a){for(var b,c=1;c<arguments.length;c++)for(var d in b=arguments[c],b)Object.prototype.hasOwnProperty.call(b,d)&&(a[d]=b[d]);return a},SwipeListener=function(a,b){if(a){'undefined'!=typeof window&&function(){function a(a,b){b=b||{bubbles:!1,cancelable:!1,detail:void 0};var c=document.createEvent('CustomEvent');return c.initCustomEvent(a,b.bubbles,b.cancelable,b.detail),c}return'function'!=typeof window.CustomEvent&&void(a.prototype=window.Event.prototype,window.CustomEvent=a)}();b||(b={}),b=_extends({},{minHorizontal:10,minVertical:10,deltaHorizontal:3,deltaVertical:5,preventScroll:!1,lockAxis:!0,touch:!0,mouse:!0},b);var c=[],d=!1,e=function(){d=!0},f=function(a){d=!1,h(a)},g=function(a){d&&(a.changedTouches=[{clientX:a.clientX,clientY:a.clientY}],i(a))};b.mouse&&(a.addEventListener('mousedown',e),a.addEventListener('mouseup',f),a.addEventListener('mousemove',g));var h=function(d){var e=Math.abs,f=Math.max,g=Math.min;if(c.length){for(var h='function'==typeof TouchEvent&&d instanceof TouchEvent,j=[],k=[],l={top:!1,right:!1,bottom:!1,left:!1},m=0;m<c.length;m++)j.push(c[m].x),k.push(c[m].y);var i=j[0],n=j[j.length-1],o=k[0],p=k[k.length-1],q={x:[i,n],y:[o,p]};if(1<c.length){var r={detail:_extends({touch:h,target:d.target},q)},s=new CustomEvent('swiperelease',r);a.dispatchEvent(s)}var t=j[0]-j[j.length-1],u='none';u=0<t?'left':'right';var v,w=g.apply(Math,j),x=f.apply(Math,j);if(e(t)>=b.minHorizontal&&('left'==u?(v=e(w-j[j.length-1]),v<=b.deltaHorizontal&&(l.left=!0)):'right'==u?(v=e(x-j[j.length-1]),v<=b.deltaHorizontal&&(l.right=!0)):void 0),t=k[0]-k[k.length-1],u='none',u=0<t?'top':'bottom',w=g.apply(Math,k),x=f.apply(Math,k),e(t)>=b.minVertical&&('top'==u?(v=e(w-k[k.length-1]),v<=b.deltaVertical&&(l.top=!0)):'bottom'==u?(v=e(x-k[k.length-1]),v<=b.deltaVertical&&(l.bottom=!0)):void 0),(c=[],l.top||l.right||l.bottom||l.left)){b.lockAxis&&((l.left||l.right)&&e(i-n)>e(o-p)?l.top=l.bottom=!1:(l.top||l.bottom)&&e(i-n)<e(o-p)&&(l.left=l.right=!1));var y={detail:_extends({directions:l,touch:h,target:d.target},q)},z=new CustomEvent('swipe',y);a.dispatchEvent(z)}else{var A=new CustomEvent('swipecancel',{detail:_extends({touch:h,target:d.target},q)});a.dispatchEvent(A)}}},i=function(d){var e=d.changedTouches[0];if(c.push({x:e.clientX,y:e.clientY}),1<c.length){var f=c[0].x,g=c[c.length-1].x,h=c[0].y,i=c[c.length-1].y,j={detail:{x:[f,g],y:[h,i],touch:'function'==typeof TouchEvent&&d instanceof TouchEvent,target:d.target}},k=new CustomEvent('swiping',j),l=!0===b.preventScroll||'function'==typeof b.preventScroll&&b.preventScroll(k);l&&d.preventDefault(),a.dispatchEvent(k)}},j=!1;try{var k=Object.defineProperty({},'passive',{get:function(){j={passive:!b.preventScroll}}});window.addEventListener('testPassive',null,k),window.removeEventListener('testPassive',null,k)}catch(a){}return b.touch&&(a.addEventListener('touchmove',i,j),a.addEventListener('touchend',h)),{off:function(){a.removeEventListener('touchmove',i,j),a.removeEventListener('touchend',h),a.removeEventListener('mousedown',e),a.removeEventListener('mouseup',f),a.removeEventListener('mousemove',g)}}}};'undefined'!=typeof module&&'undefined'!=typeof module.exports?(module.exports=SwipeListener,module.exports.default=SwipeListener):'function'==typeof define&&define.amd?define([],function(){return SwipeListener}):window.SwipeListener=SwipeListener;