Clone
/**
* @preserve FastClick: polyfill to remove click delays on browsers with touch UIs.
*
* @version 0.6.9
* @codingstandard ftlabs-jsv2
* @copyright The Financial Times Limited [All Rights Reserved]
* @license MIT License (see LICENSE.txt)
*/
function FastClick(t){"use strict";var e,i=this;if(this.trackingClick=!1,this.trackingClickStart=0,this.targetElement=null,this.touchStartX=0,this.touchStartY=0,this.lastTouchIdentifier=0,this.touchBoundary=10,this.layer=t,!t||!t.nodeType)throw new TypeError("Layer must be a document node");this.onClick=function(){return FastClick.prototype.onClick.apply(i,arguments)},this.onMouse=function(){return FastClick.prototype.onMouse.apply(i,arguments)},this.onTouchStart=function(){return FastClick.prototype.onTouchStart.apply(i,arguments)},this.onTouchMove=function(){return FastClick.prototype.onTouchMove.apply(i,arguments)},this.onTouchEnd=function(){return FastClick.prototype.onTouchEnd.apply(i,arguments)},this.onTouchCancel=function(){return FastClick.prototype.onTouchCancel.apply(i,arguments)},FastClick.notNeeded(t)||(this.deviceIsAndroid&&(t.addEventListener("mouseover",this.onMouse,!0),t.addEventListener("mousedown",this.onMouse,!0),t.addEventListener("mouseup",this.onMouse,!0)),t.addEventListener("click",this.onClick,!0),t.addEventListener("touchstart",this.onTouchStart,!1),t.addEventListener("touchmove",this.onTouchMove,!1),t.addEventListener("touchend",this.onTouchEnd,!1),t.addEventListener("touchcancel",this.onTouchCancel,!1),Event.prototype.stopImmediatePropagation||(t.removeEventListener=function(e,i,n){var o=Node.prototype.removeEventListener;"click"===e?o.call(t,e,i.hijacked||i,n):o.call(t,e,i,n)},t.addEventListener=function(e,i,n){var o=Node.prototype.addEventListener;"click"===e?o.call(t,e,i.hijacked||(i.hijacked=function(t){t.propagationStopped||i(t)}),n):o.call(t,e,i,n)}),"function"==typeof t.onclick&&(e=t.onclick,t.addEventListener("click",function(t){e(t)},!1),t.onclick=null))}FastClick.prototype.deviceIsAndroid=navigator.userAgent.indexOf("Android")>0,FastClick.prototype.deviceIsIOS=/iP(ad|hone|od)/.test(navigator.userAgent),FastClick.prototype.deviceIsIOS4=FastClick.prototype.deviceIsIOS&&/OS 4_\d(_\d)?/.test(navigator.userAgent),FastClick.prototype.deviceIsIOSWithBadTarget=FastClick.prototype.deviceIsIOS&&/OS ([6-9]|\d{2})_\d/.test(navigator.userAgent),FastClick.prototype.needsClick=function(t){"use strict";switch(t.nodeName.toLowerCase()){case"button":case"select":case"textarea":if(t.disabled)return!0;break;case"input":if(this.deviceIsIOS&&"file"===t.type||t.disabled)return!0;break;case"label":case"video":return!0}return/\bneedsclick\b/.test(t.className)},FastClick.prototype.needsFocus=function(t){"use strict";switch(t.nodeName.toLowerCase()){case"textarea":case"select":return!0;case"input":switch(t.type){case"button":case"checkbox":case"file":case"image":case"radio":case"submit":return!1}return!t.disabled&&!t.readOnly;default:return/\bneedsfocus\b/.test(t.className)}},FastClick.prototype.sendClick=function(t,e){"use strict";var i,n;document.activeElement&&document.activeElement!==t&&document.activeElement.blur(),n=e.changedTouches[0],i=document.createEvent("MouseEvents"),i.initMouseEvent("click",!0,!0,window,1,n.screenX,n.screenY,n.clientX,n.clientY,!1,!1,!1,!1,0,null),i.forwardedTouchEvent=!0,t.dispatchEvent(i)},FastClick.prototype.focus=function(t){"use strict";var e;this.deviceIsIOS&&t.setSelectionRange?(e=t.value.length,t.setSelectionRange(e,e)):t.focus()},FastClick.prototype.updateScrollParent=function(t){"use strict";var e,i;if(e=t.fastClickScrollParent,!e||!e.contains(t)){i=t;do{if(i.scrollHeight>i.offsetHeight){e=i,t.fastClickScrollParent=i;break}i=i.parentElement}while(i)}e&&(e.fastClickLastScrollTop=e.scrollTop)},FastClick.prototype.getTargetElementFromEventTarget=function(t){"use strict";return t.nodeType===Node.TEXT_NODE?t.parentNode:t},FastClick.prototype.onTouchStart=function(t){"use strict";var e,i,n;if(t.targetTouches.length>1)return!0;if(e=this.getTargetElementFromEventTarget(t.target),i=t.targetTouches[0],this.deviceIsIOS){if(n=window.getSelection(),n.rangeCount&&!n.isCollapsed)return!0;if(!this.deviceIsIOS4){if(i.identifier===this.lastTouchIdentifier)return t.preventDefault(),!1;this.lastTouchIdentifier=i.identifier,this.updateScrollParent(e)}}return this.trackingClick=!0,this.trackingClickStart=t.timeStamp,this.targetElement=e,this.touchStartX=i.pageX,this.touchStartY=i.pageY,t.timeStamp-this.lastClickTime<200&&t.preventDefault(),!0},FastClick.prototype.touchHasMoved=function(t){"use strict";var e=t.changedTouches[0],i=this.touchBoundary;return Math.abs(e.pageX-this.touchStartX)>i||Math.abs(e.pageY-this.touchStartY)>i?!0:!1},FastClick.prototype.onTouchMove=function(t){"use strict";return this.trackingClick?((this.targetElement!==this.getTargetElementFromEventTarget(t.target)||this.touchHasMoved(t))&&(this.trackingClick=!1,this.targetElement=null),!0):!0},FastClick.prototype.findControl=function(t){"use strict";return void 0!==t.control?t.control:t.htmlFor?document.getElementById(t.htmlFor):t.querySelector("button, input:not([type=hidden]), keygen, meter, output, progress, select, textarea")},FastClick.prototype.onTouchEnd=function(t){"use strict";var e,i,n,o,s,r=this.targetElement;if(!this.trackingClick)return!0;if(t.timeStamp-this.lastClickTime<200)return this.cancelNextClick=!0,!0;if(this.lastClickTime=t.timeStamp,i=this.trackingClickStart,this.trackingClick=!1,this.trackingClickStart=0,// for this to function correctly, it must be called *after* the event target is checked!
this.deviceIsIOSWithBadTarget&&(s=t.changedTouches[0],r=document.elementFromPoint(s.pageX-window.pageXOffset,s.pageY-window.pageYOffset)||r,r.fastClickScrollParent=this.targetElement.fastClickScrollParent),n=r.tagName.toLowerCase(),"label"===n){if(e=this.findControl(r)){if(this.focus(r),this.deviceIsAndroid)return!1;r=e}}else if(this.needsFocus(r))return t.timeStamp-i>100||this.deviceIsIOS&&window.top!==window&&"input"===n?(this.targetElement=null,!1):(this.focus(r),this.deviceIsIOS4&&"select"===n||(this.targetElement=null,t.preventDefault()),!1);return this.deviceIsIOS&&!this.deviceIsIOS4&&(o=r.fastClickScrollParent,o&&o.fastClickLastScrollTop!==o.scrollTop)?!0:(this.needsClick(r)||(t.preventDefault(),this.sendClick(r,t)),!1)},FastClick.prototype.onTouchCancel=function(){"use strict";this.trackingClick=!1,this.targetElement=null},FastClick.prototype.onMouse=function(t){"use strict";return this.targetElement?t.forwardedTouchEvent?!0:t.cancelable?!this.needsClick(this.targetElement)||this.cancelNextClick?(t.stopImmediatePropagation?t.stopImmediatePropagation():t.propagationStopped=!0,t.stopPropagation(),t.preventDefault(),!1):!0:!0:!0},FastClick.prototype.onClick=function(t){"use strict";var e;return this.trackingClick?(this.targetElement=null,this.trackingClick=!1,!0):"submit"===t.target.type&&0===t.detail?!0:(e=this.onMouse(t),// Only unset targetElement if the click is not permitted. This will ensure that the check for !targetElement in onMouse fails and the browser's click doesn't go through.
e||(this.targetElement=null),e)},FastClick.prototype.destroy=function(){"use strict";var t=this.layer;this.deviceIsAndroid&&(t.removeEventListener("mouseover",this.onMouse,!0),t.removeEventListener("mousedown",this.onMouse,!0),t.removeEventListener("mouseup",this.onMouse,!0)),t.removeEventListener("click",this.onClick,!0),t.removeEventListener("touchstart",this.onTouchStart,!1),t.removeEventListener("touchmove",this.onTouchMove,!1),t.removeEventListener("touchend",this.onTouchEnd,!1),t.removeEventListener("touchcancel",this.onTouchCancel,!1)},FastClick.notNeeded=function(t){"use strict";var e;if("undefined"==typeof window.ontouchstart)return!0;if(/Chrome\/[0-9]+/.test(navigator.userAgent)){if(!FastClick.prototype.deviceIsAndroid)return!0;if(e=document.querySelector("meta[name=viewport]"),e&&-1!==e.content.indexOf("user-scalable=no"))return!0}return"none"===t.style.msTouchAction?!0:!1},FastClick.attach=function(t){"use strict";return new FastClick(t)},"undefined"!=typeof define&&define.amd?define(function(){"use strict";return FastClick}):"undefined"!=typeof module&&module.exports?(module.exports=FastClick.attach,module.exports.FastClick=FastClick):window.FastClick=FastClick;