Fix possible error with dom.remove() if no parent node

src/lib/dom.js

@@ -129,7 +129,9 @@ export function closest(node, selector) {
  * @param {!HTMLElement} node
  */
 export function remove(node) {
-	node.parentNode.removeChild(node);
+	if (node.parentNode) {
+		node.parentNode.removeChild(node);
+	}
 }
 
 /**

tests/unit/lib/dom.js

@@ -256,6 +256,12 @@ QUnit.test('css()', function (assert) {
 		1,
 		'Get computed value'
 	);
+
+	assert.equal(
+		dom.css(window, 'width'),
+		null,
+		'Get computed value of window'
+	);
 });
 
 QUnit.test('data()', function (assert) {
@@ -294,6 +300,19 @@ QUnit.test('is()', function (assert) {
 	assert.notOk(dom.is(div, '.testing'));
 });
 
+QUnit.test('remove()', function (assert) {
+	var parent = document.createElement('div');
+	var child = document.createElement('div');
+
+	parent.appendChild(child);
+	dom.remove(child);
+
+	assert.ok(!child.parentNode);
+
+	// Make sure doesn't throw if has no parent
+	dom.remove(child);
+});
+
 QUnit.test('contains()', function (assert) {
 	var parent = document.createElement('div');
 	var child = document.createElement('div');