From 1aa0121c3197c3d8e7853927c1595ab0216913c6 Mon Sep 17 00:00:00 2001
From: Lebedev Konstantin <ibnRubaXa@gmail.com>
Date: Wed, 15 Feb 2017 22:24:39 +0300
Subject: [PATCH] #1029: + preventOnFilter

---
 README.md   | 1 +
 Sortable.js | 6 ++++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 785db09..5db0b99 100644
--- a/README.md
+++ b/README.md
@@ -87,6 +87,7 @@ var sortable = new Sortable(el, {
 	animation: 150,  // ms, animation speed moving items when sorting, `0` — without animation
 	handle: ".my-handle",  // Drag handle selector within list items
 	filter: ".ignore-elements",  // Selectors that do not lead to dragging (String or Function)
+	preventOnFilter: true, // Call `event.preventDefault()` when triggered `filter`
 	draggable: ".item",  // Specifies which items inside the element should be draggable
 	ghostClass: "sortable-ghost",  // Class name for the drop placeholder
 	chosenClass: "sortable-chosen",  // Class name for the chosen item
diff --git a/Sortable.js b/Sortable.js
index 087582a..648e8d2 100644
--- a/Sortable.js
+++ b/Sortable.js
@@ -249,6 +249,7 @@
 			dragClass: 'sortable-drag',
 			ignore: 'a, img',
 			filter: null,
+			preventOnFilter: true,
 			animation: 0,
 			setData: function (dataTransfer, dragEl) {
 				dataTransfer.setData('Text', dragEl.textContent);
@@ -306,6 +307,7 @@
 			var _this = this,
 				el = this.el,
 				options = this.options,
+				preventOnFilter = preventOnFilter.options,
 				type = evt.type,
 				touch = evt.touches && evt.touches[0],
 				target = (touch || evt).target,
@@ -339,7 +341,7 @@
 			if (typeof filter === 'function') {
 				if (filter.call(this, evt, target, this)) {
 					_dispatchEvent(_this, originalTarget, 'filter', target, el, startIndex);
-					evt.preventDefault();
+					preventOnFilter && evt.preventDefault();
 					return; // cancel dnd
 				}
 			}
@@ -354,7 +356,7 @@
 				});
 
 				if (filter) {
-					evt.preventDefault();
+					preventOnFilter && evt.preventDefault();
 					return; // cancel dnd
 				}
 			}