Don’t tear down bindings for removed nodes that are still in the DOM

When can-dom-mutate reports that a node has been removed, we first check whether the node is still in the document before tearing down its bindings.

Fixes #460

can-stache-bindings.js

@@ -318,7 +318,11 @@ var behaviors = {
 			teardown = dataBinding.onTeardown;
 
 			attributeDisposal = domMutate.onNodeAttributeChange(el, attributeListener);
-			removedDisposal = domMutate.onNodeRemoval(el, tearItAllDown);
+			removedDisposal = domMutate.onNodeRemoval(el, function() {
+				if (el.ownerDocument.contains(el) === false) {
+					tearItAllDown();
+				}
+			});
 	},
 	// ### bindings.behaviors.event
 	// The following section contains code for implementing the can-EVENT attribute.

test/colon/basics-test.js

@@ -3,6 +3,7 @@ var testHelpers = require('../helpers');
 
 var stacheBindings = require('can-stache-bindings');
 
+var domEvents = require('can-dom-events');
 var stache = require('can-stache');
 
 var SimpleMap = require("can-simple-map");
@@ -388,4 +389,30 @@ testHelpers.makeTests("can-stache-bindings - colon - basics", function(name, doc
 		QUnit.equal(input.value, "VALUE", "value should not have been updated");
 	});
 
+	QUnit.test("bindings still work for moved elements (#460)", function(assert) {
+		var done = assert.async();
+		var map = new SimpleMap({value: "first"});
+		var template = stache("{{value}} <input value:bind='value'/>");
+		var frag = template(map);
+		var input = frag.lastChild;
+
+		this.fixture.appendChild(frag);
+
+		// Move the input to inside the div
+		var div = document.createElement("div");
+		input.parentElement.appendChild(div);
+		div.appendChild(input);
+
+		testHelpers.afterMutation(function() {
+			map.set("value", "second");
+			QUnit.equal(input.value, "second", "value should have been updated");
+
+			input.value = "third";
+			domEvents.dispatch(input, "change");
+			QUnit.equal(map.get("value"), "third", "map should have been updated");
+
+			done();
+		});
+	});
+
 });