https://www.nmcourts.com/js/fastclick.js

1/*
2FastClick: polyfill to remove click delays on browsers with touch UIs.
3@version 1.0.3
4@codingstandard ftlabs-jsv2
5@copyright The Financial Times Limited [All Rights Reserved]
6@license MIT License (see LICENSE.txt)
7*/
8(function () { function FastClick(layer, options) { var oldOnClick; options = options || {}; this.trackingClick = false; this.trackingClickStart = 0; this.targetElement = null; this.touchStartX = 0; this.touchStartY = 0; this.lastTouchIdentifier = 0; this.touchBoundary = options.touchBoundary || 10; this.layer = layer; this.tapDelay = options.tapDelay || 200; if (FastClick.notNeeded(layer)) return; function bind(method, context) { return function () { return method.apply(context, arguments) } } var methods = ["onMouse", "onClick", "onTouchStart", "onTouchMove", "onTouchEnd", "onTouchCancel"]; var context = this; for (var i = 0, l = methods.length; i < l; i++) context[methods[i]] = bind(context[methods[i]], context); if (deviceIsAndroid) { layer.addEventListener("mouseover", this.onMouse, true); layer.addEventListener("mousedown", this.onMouse, true); layer.addEventListener("mouseup", this.onMouse, true) } layer.addEventListener("click", this.onClick, true); layer.addEventListener("touchstart", this.onTouchStart, false); layer.addEventListener("touchmove", this.onTouchMove, false); layer.addEventListener("touchend", this.onTouchEnd, false); layer.addEventListener("touchcancel", this.onTouchCancel, false); if (!Event.prototype.stopImmediatePropagation) { layer.removeEventListener = function (type, callback, capture) { var rmv = Node.prototype.removeEventListener; if (type === "click") rmv.call(layer, type, callback.hijacked || callback, capture); else rmv.call(layer, type, callback, capture) }; layer.addEventListener = function (type, callback, capture) { var adv = Node.prototype.addEventListener; if (type === "click") adv.call(layer, type, callback.hijacked || (callback.hijacked = function (event) { if (!event.propagationStopped) callback(event) }), capture); else adv.call(layer, type, callback, capture) }  } if (typeof layer.onclick === "function") { oldOnClick = layer.onclick; layer.addEventListener("click", function (event) { oldOnClick(event) }, false); layer.onclick = null }  } var deviceIsAndroid = navigator.userAgent.indexOf("Android") > 0; var deviceIsIOS = /iP(ad|hone|od)/.test(navigator.userAgent); var deviceIsIOS4 = deviceIsIOS && /OS 4_\d(_\d)?/.test(navigator.userAgent); var deviceIsIOSWithBadTarget = deviceIsIOS && /OS ([6-9]|\d{2})_\d/.test(navigator.userAgent); var deviceIsBlackBerry10 = navigator.userAgent.indexOf("BB10") > 0; FastClick.prototype.needsClick = function (target) { switch (target.nodeName.toLowerCase()) { case "button": case "select": case "textarea": if (target.disabled) return true; break; case "input": if (deviceIsIOS && target.type === "file" || target.disabled) return true; break; case "label": case "video": return true } return /\bneedsclick\b/.test(target.className) }; FastClick.prototype.needsFocus = function (target) { switch (target.nodeName.toLowerCase()) { case "textarea": return true; case "select": return !deviceIsAndroid; case "input": switch (target.type) { case "button": case "checkbox": case "file": case "image": case "radio": case "submit": return false } return !target.disabled && !target.readOnly; default: return /\bneedsfocus\b/.test(target.className) }  }; FastClick.prototype.sendClick = function (targetElement, event) { var clickEvent, touch; if (document.activeElement && document.activeElement !== targetElement) document.activeElement.blur(); touch = event.changedTouches[0]; clickEvent = document.createEvent("MouseEvents"); clickEvent.initMouseEvent(this.determineEventType(targetElement), true, true, window, 1, touch.screenX, touch.screenY, touch.clientX, touch.clientY, false, false, false, false, 0, null); clickEvent.forwardedTouchEvent = true; targetElement.dispatchEvent(clickEvent) }; FastClick.prototype.determineEventType = function (targetElement) { if (deviceIsAndroid && targetElement.tagName.toLowerCase() === "select") return "mousedown"; return "click" };

8 FastClick.prototype.focus = function (targetElement) {  var length; if (deviceIsIOS && targetElement.setSelectionRange && targetElement.type.indexOf("date") !== 0 && targetElement.type !== "time") { length = targetElement.value.length; targetElement.setSelectionRange(length, length) } else targetElement.focus() }; FastClick.prototype.updateScrollParent = function (targetElement) { var scrollParent, parentElement; scrollParent = targetElement.fastClickScrollParent; if (!scrollParent || !scrollParent.contains(targetElement)) { parentElement = targetElement; do { if (parentElement.scrollHeight > parentElement.offsetHeight) { scrollParent = parentElement; targetElement.fastClickScrollParent = parentElement; break } parentElement = parentElement.parentElement } while (parentElement) } if (scrollParent) scrollParent.fastClickLastScrollTop = scrollParent.scrollTop }; FastClick.prototype.getTargetElementFromEventTarget = function (eventTarget) { if (eventTarget.nodeType === Node.TEXT_NODE) return eventTarget.parentNode; return eventTarget }; FastClick.prototype.onTouchStart = function (event) { var targetElement, touch, selection; if (event.targetTouches.length > 1) return true; targetElement = this.getTargetElementFromEventTarget(event.target); touch = event.targetTouches[0]; if (deviceIsIOS) { selection = window.getSelection(); if (selection.rangeCount && !selection.isCollapsed) return true; if (!deviceIsIOS4) { if (touch.identifier && touch.identifier === this.lastTouchIdentifier) { event.preventDefault(); return false } this.lastTouchIdentifier = touch.identifier; this.updateScrollParent(targetElement) } } this.trackingClick = true; this.trackingClickStart = event.timeStamp; this.targetElement = targetElement; this.touchStartX = touch.pageX; this.touchStartY = touch.pageY; if (event.timeStamp - this.lastClickTime < this.tapDelay) event.preventDefault(); return true }; FastClick.prototype.touchHasMoved = function (event) { var touch = event.changedTouches[0], boundary = this.touchBoundary; if (Math.abs(touch.pageX - this.touchStartX) > boundary || Math.abs(touch.pageY - this.touchStartY) > boundary) return true; return false }; FastClick.prototype.onTouchMove = function (event) { if (!this.trackingClick) return true; if (this.targetElement !== this.getTargetElementFromEventTarget(event.target) || this.touchHasMoved(event)) { this.trackingClick = false; this.targetElement = null } return true }; FastClick.prototype.findControl = function (labelElement) { if (labelElement.control !== undefined) return labelElement.control; if (labelElement.htmlFor) return document.getElementById(labelElement.htmlFor); return labelElement.querySelector("button, input:not([type=hidden]), keygen, meter, output, progress, select, textarea") }; FastClick.prototype.onTouchEnd = function (event) { var forElement, trackingClickStart, targetTagName, scrollParent, touch, targetElement = this.targetElement; if (!this.trackingClick) return true; if (event.timeStamp - this.lastClickTime < this.tapDelay) { this.cancelNextClick = true; return true } this.cancelNextClick = false; this.lastClickTime = event.timeStamp; trackingClickStart = this.trackingClickStart; this.trackingClick = false; this.trackingClickStart = 0; if (deviceIsIOSWithBadTarget) { touch = event.changedTouches[0]; targetElement = document.elementFromPoint(touch.pageX - window.pageXOffset, touch.pageY - window.pageYOffset) || targetElement; targetElement.fastClickScrollParent = this.targetElement.fastClickScrollParent } targetTagName = targetElement.tagName.toLowerCase(); if (targetTagName === "label") { forElement = this.findControl(targetElement); if (forElement) { this.focus(targetElement); if (deviceIsAndroid) return false; targetElement = forElement } } else if (this.needsFocus(targetElement)) { if (event.timeStamp - trackingClickStart > 100 || deviceIsIOS && window.top !== window && targetTagName === "input") { this.targetElement = null; return false } this.focus(targetElement); this.sendClick(targetElement, event); if (!deviceIsIOS || targetTagName !== "select") { this.targetElement = null; event.preventDefault() } return false } if (deviceIsIOS && !deviceIsIOS4) { scrollParent = targetElement.fastClickScrollParent; if (scrollParent && scrollParent.fastClickLastScrollTop !== scrollParent.scrollTop) return true } if (!this.needsClick(targetElement)) { event.preventDefault(); this.sendClick(targetElement, event) } return false }; FastClick.prototype.onTouchCancel = function () { this.trackingClick = false; this.targetElement = null }; FastClick.prototype.onMouse = function (event) { if (!this.targetElement) return true; if (event.forwardedTouchEvent) return true; if (!event.cancelable) return true; if (!this.needsClick(this.targetElement) || this.cancelNextClick) { if (event.stopImmediatePropagation) event.stopImmediatePropagation(); else event.propagationStopped = true; event.stopPropagation(); event.preventDefault(); return false } return true }; FastClick.prototype.onClick = function (event) { var permitted; if (this.trackingClick) { this.targetElement = null; this.trackingClick = false; return true } if (event.target.type === "submit" && event.detail === 0) return true; permitted = this.onMouse(event); if (!permitted) this.targetElement = null; return permitted }; FastClick.prototype.destroy = function () { var layer = this.layer; if (deviceIsAndroid) { layer.removeEventListener("mouseover", this.onMouse, true); layer.removeEventListener("mousedown", this.onMouse, true); layer.removeEventListener("mouseup", this.onMouse, true) } layer.removeEventListener("click", this.onClick, true); layer.removeEventListener("touchstart", this.onTouchStart, false); layer.removeEventListener("touchmove", this.onTouchMove, false); layer.removeEventListener("touchend", this.onTouchEnd, false); layer.removeEventListener("touchcancel", this.onTouchCancel, false) }; FastClick.notNeeded = function (layer) { var metaViewport; var chromeVersion; var blackberryVersion; if (typeof window.ontouchstart === "undefined") return true; chromeVersion = +(/Chrome\/([0-9]+)/.exec(navigator.userAgent) || [, 0])[1]; if (chromeVersion) if (deviceIsAndroid) { metaViewport = document.querySelector("meta[name=viewport]"); if (metaViewport) { if (metaViewport.content.indexOf("user-scalable=no") !== -1) return true; if (chromeVersion > 31 && document.documentElement.scrollWidth <= window.outerWidth) return true }  } else return true; if (deviceIsBlackBerry10) { blackberryVersion = navigator.userAgent.match(/Version\/([0-9]*)\.([0-9]*)/); if (blackberryVersion[1] >= 10 && blackberryVersion[2] >= 3) { metaViewport = document.querySelector("meta[name=viewport]"); if (metaViewport) { if (metaViewport.content.indexOf("user-scalable=no") !== -1) return true; if (document.documentElement.scrollWidth <= window.outerWidth) return true } } } if (layer.style.msTouchAction === "none") return true; return false }; FastClick.attach = function (layer, options) { return new FastClick(layer, options) }; if (typeof define == "function" && typeof define.amd == "object" && define.amd) define(function () { return FastClick }); else if (typeof module !== "undefined" && module.exports) { module.exports = FastClick.attach; module.exports.FastClick = FastClick } else window.FastClick = FastClick })();