Strip whitespace by default for tags

This strips whitespace in tags by default, so multiple tags cannot
be created with only whitespace as the difference in the id.

A test has been added to ensure that this remains fixed in the future.

This closes https://github.com/select2/select2/issues/3076.

dist/js/select2.amd.full.js

@@ -2845,7 +2845,7 @@ define('select2/data/tags',[
 
     this._removeOldTags();
 
-    if (params.term == null || params.term === '' || params.page != null) {
+    if (params.term == null || params.page != null) {
       decorated.call(this, params, callback);
       return;
     }
@@ -2901,9 +2901,15 @@ define('select2/data/tags',[
   };
 
   Tags.prototype.createTag = function (decorated, params) {
+    var term = $.trim(params.term);
+
+    if (term === '') {
+      return null;
+    }
+
     return {
-      id: params.term,
-      text: params.term
+      id: term,
+      text: term
     };
   };
 

dist/js/select2.amd.js

@@ -2845,7 +2845,7 @@ define('select2/data/tags',[
 
     this._removeOldTags();
 
-    if (params.term == null || params.term === '' || params.page != null) {
+    if (params.term == null || params.page != null) {
       decorated.call(this, params, callback);
       return;
     }
@@ -2901,9 +2901,15 @@ define('select2/data/tags',[
   };
 
   Tags.prototype.createTag = function (decorated, params) {
+    var term = $.trim(params.term);
+
+    if (term === '') {
+      return null;
+    }
+
     return {
-      id: params.term,
-      text: params.term
+      id: term,
+      text: term
     };
   };
 

dist/js/select2.full.js

@@ -3284,7 +3284,7 @@ define('select2/data/tags',[
 
     this._removeOldTags();
 
-    if (params.term == null || params.term === '' || params.page != null) {
+    if (params.term == null || params.page != null) {
       decorated.call(this, params, callback);
       return;
     }
@@ -3340,9 +3340,15 @@ define('select2/data/tags',[
   };
 
   Tags.prototype.createTag = function (decorated, params) {
+    var term = $.trim(params.term);
+
+    if (term === '') {
+      return null;
+    }
+
     return {
-      id: params.term,
-      text: params.term
+      id: term,
+      text: term
     };
   };
 

dist/js/select2.js

@@ -3284,7 +3284,7 @@ define('select2/data/tags',[
 
     this._removeOldTags();
 
-    if (params.term == null || params.term === '' || params.page != null) {
+    if (params.term == null || params.page != null) {
       decorated.call(this, params, callback);
       return;
     }
@@ -3340,9 +3340,15 @@ define('select2/data/tags',[
   };
 
   Tags.prototype.createTag = function (decorated, params) {
+    var term = $.trim(params.term);
+
+    if (term === '') {
+      return null;
+    }
+
     return {
-      id: params.term,
-      text: params.term
+      id: term,
+      text: term
     };
   };
 

src/js/select2/data/tags.js

@@ -29,7 +29,7 @@ define([
 
     this._removeOldTags();
 
-    if (params.term == null || params.term === '' || params.page != null) {
+    if (params.term == null || params.page != null) {
       decorated.call(this, params, callback);
       return;
     }
@@ -85,9 +85,15 @@ define([
   };
 
   Tags.prototype.createTag = function (decorated, params) {
+    var term = $.trim(params.term);
+
+    if (term === '') {
+      return null;
+    }
+
     return {
-      id: params.term,
-      text: params.term
+      id: term,
+      text: term
     };
   };
 

tests/data/tags-tests.js

@@ -38,6 +38,32 @@ test('does not trigger on blank or null terms', function (assert) {
   });
 });
 
+test('white space is trimmed by default', function (assert) {
+  var data = new SelectTags($('#qunit-fixture .single'), options);
+
+  data.query({
+    term: '  '
+  }, function (data) {
+    assert.equal(data.results.length, 1);
+
+    var item = data.results[0];
+
+    assert.equal(item.id, 'One');
+    assert.equal(item.text, 'One');
+  });
+
+  data.query({
+    term: ' One '
+  }, function (data) {
+    assert.equal(data.results.length, 1);
+
+    var item = data.results[0];
+
+    assert.equal(item.id, 'One');
+    assert.equal(item.text, 'One');
+  });
+});
+
 test('does not trigger for additional pages', function (assert) {
   var data = new SelectTags($('#qunit-fixture .single'), options);