Add useKeyboard option to disable keyboard if needed

Author: ayamflow

README.md

@@ -43,6 +43,7 @@ Each instance will listen only once to any DOM listener. These listener are enab
 - unpreventTouchClass: Elements with this class won't `preventDefault` on touchMove. For instance, useful for a scrolling text inside a VirtualScroll-controled element. *Defaults to `vs-touchmove-allowed`*.
 - limitInertia: if true, will leverage [Lethargy](https://github.com/d4nyll/lethargy) to avoid everlasting scroll events (mostly on Apple Mouse, Trackpad, and free-wheel mouse). *Defaults to false.*
 - passive: if used, will use [passive events declaration](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#Improving_scrolling_performance_with_passive_listeners) for the wheel and touch listeners. Can be true or false. *Defaults to undefined.*
+- hasKeyDown: if true, allows to use arrows to navigate, and space to jump from one screen. *Defaults to true*
 
 ### License
 MIT.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "virtual-scroll",
-  "version": "1.3.1",
+  "version": "1.4.0",
   "description": "Smooth fake scroll using CSS transform",
   "main": "src/index.js",
   "scripts": {

src/index.js

@@ -33,7 +33,8 @@ function VirtualScroll(options) {
         keyStep: 120,
         preventTouch: false,
         unpreventTouchClass: 'vs-touchmove-allowed',
-        limitInertia: false
+        limitInertia: false,
+        useKeyboard: true
     }, options);
 
     if (this.options.limitInertia) this._lethargy = new Lethargy();
@@ -172,7 +173,7 @@ VirtualScroll.prototype._bind = function() {
         this.el.addEventListener('MSPointerMove', this._onTouchMove, true);
     }
 
-    if(support.hasKeyDown) document.addEventListener('keydown', this._onKeyDown);
+    if(support.hasKeyDown && this.options.useKeyboard) document.addEventListener('keydown', this._onKeyDown);
 };
 
 VirtualScroll.prototype._unbind = function() {
@@ -190,7 +191,7 @@ VirtualScroll.prototype._unbind = function() {
         this.el.removeEventListener('MSPointerMove', this._onTouchMove, true);
     }
 
-    if(support.hasKeyDown) document.removeEventListener('keydown', this._onKeyDown);
+    if(support.hasKeyDown && this.options.useKeyboard) document.removeEventListener('keydown', this._onKeyDown);
 };
 
 VirtualScroll.prototype.on = function(cb, ctx) {