wheel-indicator - npm Package Compare versions

Comparing version 1.2.1 to 1.2.2

lib/wheel-indicator.js

 /**
  * Generates event when user makes new movement (like a swipe on a touchscreen).
- * @version 1.2.0
+ * @version 1.2.2
  * @link https://github.com/Promo/wheel-indicator
@@ -206,3 +206,3 @@ * @license MIT
         if(elem.addEventListener) {
-            elem.addEventListener(type, handler, false);
+            elem.addEventListener(type, handler, isPassiveSupported() ? { passive: false } : false);
         } else if (elem.attachEvent) {
@@ -215,3 +215,3 @@ elem.attachEvent('on' + type, handler);
         if (elem.removeEventListener) {
-            elem.removeEventListener(type, handler, false);
+            elem.removeEventListener(type, handler, isPassiveSupported() ? { passive: false } : false);
         } else if (elem.detachEvent) {
@@ -247,1 +247,19 @@ elem.detachEvent('on'+ type, handler);
 }
+
+// https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#Safely_detecting_option_support
+// https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#Improving_scrolling_performance_with_passive_listeners
+function isPassiveSupported() {
+    var passiveSupported = false;
+    try {
+        var options = Object.defineProperty({}, "passive", {
+            get: function() {
+                passiveSupported = true;
+            }
+        });
+
+        window.addEventListener("test", null, options);
+        window.removeEventListener("test", null, options);
+    } catch(err) {}
+
+    return passiveSupported;
+}

package.json

 {
   "name": "wheel-indicator",
-  "version": "1.2.1",
+  "version": "1.2.2",
   "description": "normalizes an inertial mousewheel",
@@ -5,0 +5,0 @@ "main": "lib/wheel-indicator",

No alert changes

Improved metrics

Total package byte prevSize

26185

2.98%

Lines of code

527

2.93%

No dependency changes