From 142eb234e8ed3bc6a5d158166232a5b5a4d0d7ef Mon Sep 17 00:00:00 2001
From: Andrej Badin <contact@andrejbadin.com>
Date: Wed, 18 Nov 2015 00:42:34 +0100
Subject: [PATCH] Add option to force Gemini scrollbars even if native
 overlay-scrollbars are available.

---
 README.md |  1 +
 index.js  | 10 ++++++----
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 27b41ca..d9c2538 100644
--- a/README.md
+++ b/README.md
@@ -79,6 +79,7 @@ name | type | default | description
 * **element** | HTMLElement | `null` | The element to apply scrollbars
 autoshow | Boolean | `false` | Show scrollbars upon hovering
 createElements | Boolean | `true` | Create and append the require HTMLElements at runtime.
+forceGemini | Boolean | `false` | Force Gemini scrollbars even if native overlay-scrollbars are available. Useful for development.
 
 \* `required`
 
diff --git a/index.js b/index.js
index 55ac07d..7412199 100644
--- a/index.js
+++ b/index.js
@@ -5,7 +5,7 @@
  * @license MIT
  */
 (function() {
-    var SCROLLBAR_WIDTH, CLASSNAMES, addClass, removeClass, getScrollbarWidth;
+    var SCROLLBAR_WIDTH, DONT_CREATE_GEMINI, CLASSNAMES, addClass, removeClass, getScrollbarWidth;
 
     CLASSNAMES = {
         element: 'gm-scrollbar-container',
@@ -61,6 +61,8 @@
 
         SCROLLBAR_WIDTH = getScrollbarWidth();
 
+        DONT_CREATE_GEMINI = SCROLLBAR_WIDTH === 0 && !this.forceGemini;
+
         this._cache = {events: {}};
         this._created = false;
         this._cursorDown = false;
@@ -77,7 +79,7 @@
     }
 
     GeminiScrollbar.prototype.create = function create() {
-        if (SCROLLBAR_WIDTH === 0) {
+        if (DONT_CREATE_GEMINI) {
             addClass(this.element, [CLASSNAMES.prevented]);
             return this;
         }
@@ -133,7 +135,7 @@
     };
 
     GeminiScrollbar.prototype.update = function update() {
-        if (SCROLLBAR_WIDTH === 0) {
+        if (DONT_CREATE_GEMINI) {
             return this;
         }
 
@@ -159,7 +161,7 @@
     };
 
     GeminiScrollbar.prototype.destroy = function destroy() {
-        if (SCROLLBAR_WIDTH === 0) {
+        if (DONT_CREATE_GEMINI) {
             return this;
         }