Update FastClick

assets/javascripts/vendor/fastclick.js

@@ -1,7 +1,7 @@
 /**
  * @preserve FastClick: polyfill to remove click delays on browsers with touch UIs.
  *
- * @version 1.0.2
+ * @version 1.0.3
  * @codingstandard ftlabs-jsv2
  * @copyright The Financial Times Limited [All Rights Reserved]
  * @license MIT License (see LICENSE.txt)
@@ -197,6 +197,12 @@ var deviceIsIOS4 = deviceIsIOS && (/OS 4_\d(_\d)?/).test(navigator.userAgent);
  */
 var deviceIsIOSWithBadTarget = deviceIsIOS && (/OS ([6-9]|\d{2})_\d/).test(navigator.userAgent);
 
+/**
+ * BlackBerry requires exceptions.
+ *
+ * @type boolean
+ */
+var deviceIsBlackBerry10 = navigator.userAgent.indexOf('BB10') > 0;
 
 /**
  * Determine whether a given element requires a native click.
@@ -401,7 +407,10 @@ FastClick.prototype.onTouchStart = function(event) {
 			// with the same identifier as the touch event that previously triggered the click that triggered the alert.
 			// Sadly, there is an issue on iOS 4 that causes some normal touch events to have the same identifier as an
 			// immediately preceeding touch event (issue #52), so this fix is unavailable on that platform.
-			if (touch.identifier === this.lastTouchIdentifier) {
+			// Issue 120: touch.identifier is 0 when Chrome dev tools 'Emulate touch events' is set with an iOS device UA string,
+			// which causes all touch events to be ignored. As this block only applies to iOS, and iOS identifiers are always long,
+			// random integers, it's safe to to continue if the identifier is 0 here.
+			if (touch.identifier && touch.identifier === this.lastTouchIdentifier) {
 				event.preventDefault();
 				return false;
 			}
@@ -723,6 +732,7 @@ FastClick.notNeeded = function(layer) {
 	'use strict';
 	var metaViewport;
 	var chromeVersion;
+	var blackberryVersion;
 
 	// Devices that don't support touch don't need FastClick
 	if (typeof window.ontouchstart === 'undefined') {
@@ -754,6 +764,27 @@ FastClick.notNeeded = function(layer) {
 		}
 	}
 
+	if (deviceIsBlackBerry10) {
+		blackberryVersion = navigator.userAgent.match(/Version\/([0-9]*)\.([0-9]*)/);
+
+		// BlackBerry 10.3+ does not require Fastclick library.
+		// https://github.com/ftlabs/fastclick/issues/251
+		if (blackberryVersion[1] >= 10 && blackberryVersion[2] >= 3) {
+			metaViewport = document.querySelector('meta[name=viewport]');
+
+			if (metaViewport) {
+				// user-scalable=no eliminates click delay.
+				if (metaViewport.content.indexOf('user-scalable=no') !== -1) {
+					return true;
+				}
+				// width=device-width (or less than device-width) eliminates click delay.
+				if (document.documentElement.scrollWidth <= window.outerWidth) {
+					return true;
+				}
+			}
+		}
+	}
+
 	// IE10 with -ms-touch-action: none, which disables double-tap-to-zoom (issue #97)
 	if (layer.style.msTouchAction === 'none') {
 		return true;