TouchManager.disableContextMenu is a new method that will try to disable the context menu on touch devices, if the Game Config disableContextMenu is set. Previously, it only tried to do it for the Mouse Manager, but now does it for touch as well. Fix phaserjs#4778

Author: photonstorm

src/input/touch/TouchManager.js

@@ -32,7 +32,7 @@ var TouchManager = new Class({
     initialize:
 
     function TouchManager (inputManager)
-    {
+    {ó
         /**
          * A reference to the Input Manager.
          *
@@ -186,12 +186,40 @@ var TouchManager = new Class({
             this.target = this.manager.game.canvas;
         }
 
+        if (config.disableContextMenu)
+        {
+            this.disableContextMenu();
+        }
+
         if (this.enabled && this.target)
         {
             this.startListeners();
         }
     },
 
+    /**
+     * Attempts to disable the context menu from appearing if you touch-hold on the browser.
+     * 
+     * Works by listening for the `contextmenu` event and prevent defaulting it.
+     * 
+     * Use this if you need to disable the OS context menu on mobile.
+     *
+     * @method Phaser.Input.Touch.TouchManager#disableContextMenu
+     * @since 3.20.0
+     *
+     * @return {Phaser.Input.Touch.TouchManager} This Touch Manager instance.
+     */
+    disableContextMenu: function ()
+    {
+        document.body.addEventListener('contextmenu', function (event)
+        {
+            event.preventDefault();
+            return false;
+        });
+
+        return this;
+    },
+
     /**
      * Starts the Touch Event listeners running as long as an input target is set.
      *