⏫ Forwardport of #12739 to 2.3-develop branch

Applied pull request patch https://github.com/magento/magento2/pull/12739.patch (created by @zamoroka) based on commit(s):
  1. 465e14b
  2. 8bc807f
  3. e9dcb03

Fixed GitHub Issues in 2.3-develop branch:
  - #6113: Validate range-words in Form component (UI Component) (reported by @robinhuy)

Author: magento-engcom-team

app/code/Magento/Ui/view/base/web/js/lib/validation/rules.js

@@ -84,8 +84,10 @@ define([
         ],
         'range-words': [
             function (value, params) {
-                return utils.stripHtml(value).match(/\b\w+\b/g).length >= params[0] &&
-                    value.match(/bw+b/g).length < params[1];
+                var match = utils.stripHtml(value).match(/\b\w+\b/g) || [];
+
+                return match.length >= params[0] &&
+                    match.length <= params[1];
             },
             $.mage.__('Please enter between {0} and {1} words.')
         ],

dev/tests/js/jasmine/tests/app/code/Magento/Ui/base/js/lib/validation/rules.test.js

@@ -0,0 +1,43 @@
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+/* eslint-disable max-nested-callbacks */
+define([
+    'Magento_Ui/js/lib/validation/rules'
+], function (rules) {
+    'use strict';
+
+    describe('Magento_Ui/js/lib/validation/rules', function () {
+        describe('"range-words" method', function () {
+            it('Check on empty value', function () {
+                var value = '',
+                    params = [1,3];
+
+                expect(rules['range-words'].handler(value, params)).toBe(false);
+            });
+
+            it('Check on redundant words', function () {
+                var value = 'a b c d',
+                    params = [1,3];
+
+                expect(rules['range-words'].handler(value, params)).toBe(false);
+            });
+
+            it('Check with three words', function () {
+                var value = 'a b c',
+                    params = [1,3];
+
+                expect(rules['range-words'].handler(value, params)).toBe(true);
+            });
+
+            it('Check with one word', function () {
+                var value = 'a',
+                    params = [1,3];
+
+                expect(rules['range-words'].handler(value, params)).toBe(true);
+            });
+        });
+    });
+});