New Features:

• #9661: Added the option to configure anchor tags with JavaScript code in href attribute.

Fixed Issues:

• #11861: Fixed: [Webkit/Blink] Span elements created while joining adjacent elements. Note: This patch only covers cases when Backspace or Delete is pressed on a collapsed (empty) selection. The remaining case, with a non-empty selection, will be fixed in next release.
• #10714: Fixed: [iOS] Selection and drop-downs are broken if touch listener is used due to Webkit bug. Thanks to Arty Gus!
• #11911: Fixed setting the dir attribute for preloaded language in CKEDITOR.lang. Thanks to Akash Mohapatra!
• #11926: Fixed: Code snippet does not decode HTML entities when loading code from the <code> element.
• #11223: Fixed: Issue when Protected Source was not working in the title element.
• #11859: Fixed: Removed Source Dialog plugin from being required in Code Snippet sample.
• #11754: Fixed: Infinite loop in Google Chrome when content contains not closed attributes.
• #11848: Fixed: editor.insertElement() throwing an exception in IE when there was no selection in editor.
• #11801: Fixed: Editor anchors unavailable when linking Enhanced Image widget.
• #11626: Fixed: Table Resize sets invalid width.
• #11872: Made element.addClass() chainable symmetrically to element.removeClass().
• #11813: Fixed: Link lost while pasting captioned image and restoring undo snapshot (Enhanced Image).
• #11814: Fixed: Link and Unlink entries persistently displayed in Enhanced Image context menu.
• #11839: Fixed: [IE9] Caret jumps out of editable area when resizing editor in source mode.
• #11822: Fixed: [Webkit] Editing Anchors by double-click broken in some cases.
• #11823: Fixed: [IE8] Table Resize throws error over scrollbar.
• #11788: Fixed: It is not possible to change language back to Not set in Code Snippet dialog.
• #11788: Fixed: Filter rules are not applied inside elements with contenteditable attribute set to true.
• #11798: Fixed: Inserting non-editable element inside a table cell breaks the table badly.
• #11793: Fixed: Drop-down is not "on" when clicking it while editor is blurred.
• #11850: Fixed: Fake objects with contenteditable set to false are not downcasted properly.
• #11811: Fixed: Widget's data are not encoded correctly when passed to attribute.
• #11777: Fixed encoding ampersand in the Mathematical Formulas plugin.
• #11880: Fixed: [IE8-9] Linked image has a default thick border.

Other changes:

• #11807: Updated jQuery version used in sample to 1.11.0 and tested CKEditor jQuery adapter with version 1.11.0 and 2.1.0.
• #9504: Stopped using deprecated attribute.specified in all browsers except IE.
• #11809: Changed tab size in <pre> to 4 spaces.

Important Notes:

• Marked the editor.beforePaste event as deprecated.
• The default class of captioned images has changed to image (was: caption). Please note that once edited in CKEditor 4.4+, all existing images of the caption class (<figure class="caption">) will be filtered out unless theconfig.image2_captionedClass option is set to caption. For backward compatibility (i.e. when upgrading), it is highly recommended to use this setting, which also helps prevent CSS conflicts, etc. This does not apply to new CKEditor integrations.
• Widgets without defined buttons are no longer registered automatically to the Advanced Content Filter. Before CKEditor 4.4 widgets were registered to the ACF which was an incorrect behavior (#11567). This change should not have any impact on standard scenarios, but if your button does not execute the widget command, you need to set allowedContent andrequiredContent properties for it manually, because the editor will not be able to find them.
• The Show Borders plugin was added to the Standard installation package in order to ensure that unstyled tables are still visible for the user (#11665).
• Since CKEditor 4.4 the editor instance should be passed to CKEDITOR.style methods to ensure full compatibility with other features (e.g. applying styles to widgets requires that). We ensured backward compatibility though, so the CKEDITOR.style will work even when the editor instance is not provided.

New Features:

• #11297: Styles can now be applied to widgets. The definition of a style which can be applied to a specific widget must contain two additional properties — type and widget. Read more in the Widget Styles section of the "Syles Drop-down" guide. Note that by default, widgets support only classes and no other attributes or styles. Related changes and features:
  • Introduced the CKEDITOR.style.addCustomHandler() method for registering custom style handlers.
  • The CKEDITOR.style.apply() and CKEDITOR.style.remove() methods are now called with an editor instance instead of the document so they can be reused by the CKEDITOR.editor.applyStyle() and CKEDITOR.editor.removeStyle() methods. Backward compatibility was preserved, but from CKEditor 4.4 it is highly recommended to pass an editor instead of a document to these methods.
  • Many new methods and properties were introduced in the Widget API to make the handling of styles by widgets fully customizable. See: widget.definition.styleableElements,  widget.definition.styleToAllowedContentRule,  widget.addClass(),  widget.removeClass(),  widget.getClasses(),  widget.hasClass(),  widget.applyStyle(),  widget.removeStyle(),  widget.checkStyleActive().
  • Integration with the Allowed Content Filter required an introduction of the CKEDITOR.style.toAllowedContent() method which can be implemented by the custom style handler and if exists, it is used by the CKEDITOR.filter to translate a style to allowed content rules.
• #11300: Various changes in the Enhanced Image plugin:
  • Introduced the config.image2_captionedClass option to configure the class of captioned images.
  • Introduced the config.image2_alignClasses option to configure the way images are aligned with CSS classes. If this setting is defined, the editor produces classes instead of inline styles for aligned images.
  • Default image caption can be translated (customized) with the editor.lang.image2.captionPlaceholder string.
• #11341: Enhanced Image plugin: It is now possible to add a link to any image type.
• #10202: Introduced wildcard support in the Allowed Content Rules format.
• #10276: Introduced blacklisting in the Allowed Content Filter.
• #10480: Introduced code snippets with code highlighting. There are two versions available so far — the default Code Snippetwhich uses the highlight.js library and the Code Snippet GeSHi which uses the GeSHi library.
• #11737: Introduced an option to prevent filtering of an element that matches custom criteria (seefilter.addElementCallback()).
• #11532: Introduced the editor.addContentsCss() method that can be used for adding custom CSS files.
• #11536: Added the CKEDITOR.tools.htmlDecode() method for decoding HTML entities.
• #11225: Introduced the CKEDITOR.tools.transparentImageData property which contains transparent image data to be used in CSS or as image source.

Other changes:

• #11377: Unified internal representation of empty anchors using the fake objects.
• #11422: Removed Firefox 3.x, Internet Explorer 6 and Opera 12.x leftovers in code.
• #5217: Setting data (including switching between modes) creates a new undo snapshot. Besides that:
  • Introduced the editable.status property.
  • Introduced a new forceUpdate option for the editor.lockSnapshot event.
  • Fixed: Selection not being unlocked in inline editor after setting data (#11500).
• The WebSpellChecker plugin was updated to the latest version.

Fixed Issues:

• #10190: Fixed: Removing block style with editor.removeStyle() should result in a paragraph and not a div.
• #11727: Fixed: The editor tries to select a non-editable image which was clicked.

New Features:

• Added new translation: Tatar.

Fixed Issues:

• #11677: Fixed: Undo/Redo keystrokes are blocked in the source mode.
• #11717: Document Properties plugin requires the Color Dialog plugin to work.

Fixed Issues:

• #11597: [IE11] Fixed: Error thrown when trying to open the preview using the keyboard.
• #11544: Placeholders will no longer be upcasted in parents not accepting <span> elements.
• #8663: Fixed element.renameNode() not clearing the element.getName() cache.
• #11574: Fixed: Backspace destroying the DOM structure if an inline editable is placed in a list item.
• #11603: Fixed: Table Resize attaches to tables outside the editable.
• #9205, #7805, #8216: Fixed: {cke_protected_*} appearing in data in various cases where HTML comments are placed next to " or '.
• #11635: Fixed: Some attributes are not protected before the content is passed through the fix bin.
• #11660: [IE] Fixed: Table content is lost when some extra markup is inside the table.
• #11641: Fixed: Switching between modes in the classic editor removes content styles for the inline editor.
• #11568: Fixed: Styles drop-down list is not enabled on selection change.

Fixed Issues:

• #11500: [Webkit/Blink] Fixed: Selection lost when setting data in another inline editor. Additionally, selection.removeAllRanges() is now scoped to selection's root.
• #11104: [IE] Fixed: Various issues with scrolling and selection when focusing widgets.
• #11487: Moving mouse over the Enhanced Image widget will no longer change the value returned by the editor.checkDirty() method.
• #8673: [WebKit] Fixed: Cannot select and remove the Page Break.
• #11413: Fixed: Incorrect editor.execCommand() behavior.
• #11438: Splitting table cells vertically is no longer changing table structure.
• #8899: Fixed: Links in the About CKEditor dialog window now open in a new browser window or tab.
• #11490: Fixed: Menu button panel not showing in the source mode.
• #11417: The widget.doubleclick event is not canceled anymore after editing was triggered.
• #11253: [IE] Fixed: Clipped upload button in the Enhanced Image dialog window.
• #11359: Standardized the way anchors are discovered by the Link plugin.
• #11058: [IE8] Fixed: Error when deleting a table row.
• #11508: Fixed: htmlDataProcessor discovering protected attributes within other attributes' values.
• #11533: Widgets: Avoid recurring upcasts if the DOM structure was modified during an upcast.
• #11400: Fixed: The domObject.removeAllListeners() method does not remove custom listeners completely.
• #11493: Fixed: The selection.getRanges() method does not override cached ranges when used with the onlyEditables argument.
• #11390: [IE] All XML plugin methods now work in IE10+.
• #11542: [IE11] Fixed: Blurry toolbar icons when Right-to-Left UI language is set.
• #11504: Fixed: When config.fullPage is set to true, entities are not encoded in editor output.
• #11004: Integrated Enhanced Image dialog window with Advanced Content Filter.
• #11439: Fixed: Properties get cloned in the Cell Properties dialog window if multiple cells are selected.

Fixed Issues: 

• #11331: A menu button will have a changed label when selected instead of using the aria-pressed attribute.
• #11177: Widget drag handler improvements:
  • #11176: Fixed: Initial position is not updated when the widget data object is empty.
  • #11001: Fixed: Multiple synchronous layout recalculations are caused by initial drag handler positioning causing performance issues.
  • #11161: Fixed: Drag handler is not repositioned in various situations.
  • #11281: Fixed: Drag handler and mask are duplicated after widget reinitialization.
• #11207: [Firefox] Fixed: Misplaced Enhanced Image resizer in the inline editor.
• #11102: CKEDITOR.template improvements:
  • #11102: Added newline character support.
  • #11216: Added "\'" substring support.
• #11121: [Firefox] Fixed: High Contrast mode is enabled when the editor is loaded in a hidden iframe.
• #11350: The default value of config.contentsCss is affected by CKEDITOR.getUrl.
• #11097: Improved the Autogrow plugin performance when dealing with very big tables.
• #11290: Removed redundant code in the Source Dialog plugin.
• #11133: Page Break becomes editable if pasted.
• #11126: Fixed: Native Undo executed once the bottom of the snapshot stack is reached.
• #11131: Div Editing Area: Fixed: Error thrown when switching to source mode if the selection was in widget's nested editable.
• #11139: Div Editing Area: Fixed: Elements Path is not cleared after switching to source mode.
• #10778: Fixed a bug with range enlargement. The range no longer expands to visible whitespace.
• #11146: [IE] Fixed: Preview window switches Internet Explorer to Quirks Mode.
• #10762: [IE] Fixed: JavaScript code displayed in preview window's URL bar.
• #11186: Introduced the widgets.repository.addUpcastCallback method that allows to block upcasting given element to a widget.
• #11307: Fixed: Paste as Plain Text conflict with the MooTools library.
• #11140: [IE11] Fixed: Anchors are not draggable.
• #11379: Changed default contents line-height to unitless values to avoid huge text overlapping (like in #9696).
• #10787: [Firefox] Fixed: Broken replacement of text while pasting into div-based editor.
• #10884: Widgets integration with the Show Blocks plugin.
• #11021: Fixed: An error thrown when selecting entire editable contents while fake selection is on.
• #11086: [IE8] Re-enable inline widgets drag&drop in Internet Explorer 8.
• #11372: Widgets: Special characters encoded twice in nested editables.
• #10068: Fixed: Support for protocol-relative URLs.
• #11283: Enhanced Image: A <div> element with text-align: center and an image inside is not recognised correctly.
• #11196: Accessibility Instructions: Allowed additional keyboard button labels to be translated in the dialog window.

Important Notes:

• To match the naming convention, the language button is now Language (#11201).
• Enhanced Image button, context menu, command, and icon names match those of the Image plugin (#11222).

Fixed Issues:

• #11244: Changed: The widget.repository.checkWidgets() method now fires the widget.repository.checkWidgets event, so from CKEditor 4.3.1 it is preferred to use the method rather than fire the event.
• #11171: Fixed: editor.insertElement() and editor.insertText() methods do not call the widget.repository.checkWidgets() method.
• #11085: [IE8] Replaced preview generated by the Mathematical Formulas widget with a placeholder.
• #11044: Enhanced WAI-ARIA support for the Language plugin drop-down menu.
• #11075: With drop-down menu button focused, pressing the Down Arrow key will now open the menu and focus its first option.
• #11165: Fixed: The File Browser plugin cannot be removed from the editor.
• #11159: [IE9-10] Enhanced Image: Fixed buggy discovery of image dimensions.
• #11101: Drop-down lists no longer break when given double quotes.
• #11077: Enhanced Image: Empty undo step recorded when resizing the image.
• #10853: Enhanced Image: Widget has paragraph wrapper when de-captioning unaligned image.
• #11198: Widgets: Drag handler is not fully visible when an inline widget is in a heading.
• #11132: [Firefox] Fixed: Caret is lost after drag and drop of an inline widget.
• #11182: [IE10-11] Fixed: Editor crashes (IE11) or works with minor issues (IE10) if a page is loaded in Quirks Mode. See env.quirks for more details.
• #11204: Added figure and figcaption styles to the contents.css file so Enhanced Image looks nicer.
• #11202: Fixed: No newline in BBCode mode.
• #10890: Fixed: Error thrown when pressing the Delete key in a list item.
• #10055: [IE8-10] Fixed: Delete pressed on a selected image causes the browser to go back.
• #11183: Fixed: Inserting a horizontal rule or a table in multiple row selection causes a browser crash. Additionally, the editor.insertElement() method does not insert the element into every range of a selection any more.
• #11042: Fixed: Selection made on an element containing a non-editable element was not auto faked.
• #11125: Fixed: Keyboard navigation through menu and drop-down items will now cycle.
• #11011: Fixed: The editor.applyStyle() method removes attributes from nested elements.
• #11179: Fixed: editor.destroy() does not cleanup content generated by the Table Resize plugin for inline editors.
• #11237: Fixed: Table border attribute value is deleted when pasting content from Microsoft Word.
• #11250: Fixed: HTML entities inside the <textarea> element are not encoded.
• #11260: Fixed: Initially disabled buttons are not read by JAWS as disabled.
• #11200: Added Clipboard plugin as a dependency for Widget to fix drag and drop.

New Features:

• #10612: Internet Explorer 11 support.
• #10869: Widgets: Added better integration with the Elements Path plugin.
• #10886: Widgets: Added tooltip to the drag handle.
• #10933: Widgets: Introduced drag and drop of block widgets with the Line Utilities plugin.
• #10936: Widget System changes for easier integration with other dialog systems.
• #10895: Enhanced Image: Added file browser integration.
• #11002: Added the draggable option to disable drag and drop support for widgets.
• #10937: Mathematical Formulas widget improvements:
  • loading indicator (#10948),
  • applying paragraph changes (like font color change) to iframe (#10841),
  • Firefox and IE9 clipboard fixes (#10857),
  • fixing same origin policy issue (#10840),
  • fixing undo bugs (#10842, #10930),
  • fixing other minor bugs.
• #10862: Placeholder plugin was rewritten as a widget.
• #10822: Added styles system integration with non-editable elements (for example widgets) and their nested editables. Styles cannot change non-editable content and are applied in nested editable only if allowed by its type and content filter.
• #10856: Menu buttons will now toggle the visibility of their panels when clicked multiple times. Language plugin fixes: Added active language highlighting, added an option to remove the language.
• #10028: New config.dialog_noConfirmCancel configuration option that eliminates the need to confirm closing of a dialog window when the user changed any of its fields.
• #10848: Integrate remaining plugins (Styles, Format, Font, Color Button, Language and Indent) with active filter.
• #10855: Change the extension of emoticons in the BBCode sample from GIF to PNG.

Fixed Issues:

• #10831: Enhanced Image: Merged image2inline and image2block into one image2 widget.
• #10835: Enhanced Image: Improved visibility of the resize handle.
• #10836: Enhanced Image: Preserve custom mouse cursor while resizing the image.
• #10939: [Firefox] Enhanced Image: hovering the image causes it to change.
• #10866: Fixed: Broken Tab key navigation in the Enhanced Image dialog window.
• #10833: Fixed: Lock ratio option should be on by default in the Enhanced Image dialog window.
• #10881: Various improvements to Enter key behavior in nested editables.
• #10879: Remove Format should not leak from a nested editable.
• #10877: Fixed: WebSpellChecker fails to apply changes if a nested editable was focused.
• #10877: Fixed: SCAYT blocks typing in nested editables.
• #11079: Add button icons to the Placeholder sample.
• #10870: The paste command is no longer being disabled when the clipboard is empty.
• #10854: Fixed: Firefox prepends <br> to <body>, so it is stripped by the HTML data processor.
• #10823: Fixed: Link plugin does not work with non-editable content.
• #10828: Magic Line integration with the Widget System.
• #10865: Improved hiding copybin, so copying widgets works smoothly.
• #11066: Widget's private parts use CSS reset.
• #11027: Fixed: Block commands break on widgets; added the contentDomInvalidated event.
• #10430: Resolve dependence of the Image plugin on the Form Elements plugin.
• #10911: Fixed: Browser Alt hotkeys will no longer be blocked while a widget is focused.
• #11082: Fixed: Selected widget is not copied or cut when using toolbar buttons or context menu.
• #11083: Fixed list and div element application to block widgets.
• #10887: Internet Explorer 8 compatibility issues related to the Widget System.
• #11074: Temporarily disabled inline widget drag and drop, because of seriously buggy native range#moveToPoint method.
• #11098: Fixed: Wrong selection position after undoing widget drag and drop.
• #11110: Fixed: IFrame and Flash objects are being incorrectly pasted in certain conditions.
• #11129: Page break is lost when loading data.
• #11123: [Firefox] Widget is destroyed after being dragged outside of <body>.
• #11124: Fixed the Elements Path in an editor using the Div Editing Area.

Fixed Issues:

• #10994: Fixed: Loading external jQuery library when opening the jQuery Adapter sample directly from file.
• #10975: [IE] Fixed: Error thrown while opening the color palette.
• #9929: [Blink/WebKit] Fixed: A non-breaking space is created once a character is deleted and a regular space is typed.
• #10963: Fixed: JAWS issue with the keyboard shortcut for Magic Line.
• #11096: Fixed: TypeError: Object has no method 'is'.

Fixed Issues:

• #9314: Fixed: Incorrect error message on closing a dialog window without saving changs.
• #10308: [IE10] Fixed: Unspecified error when deleting a row.
• #10945: [Chrome] Fixed: Clicking with a mouse inside the editor does not show the caret.
• #10912: Prevent default action when content of a non-editable link is clicked.
• #10913: Fixed CKEDITOR.plugins.addExternal not handling paths including file name specified.
• #10666: Fixed CKEDITOR.tools.isArray not working cross frame.
• #10910: [IE9] Fixed JavaScript error thrown in Compatibility Mode when clicking and/or typing in the editing area.
• #10868: [IE8] Prevent the browser from crashing when applying the Inline Quotation style.
• #10915: Fixed: Invalid CSS filter in the Kama skin.
• #10914: Plugins Indent List and Indent Block are now included in the build configuration.
• #10812: Fixed range#createBookmark2 incorrectly normalizing offsets. This bug was causing many issues: #10850, #10842.
• #10951: Reviewed and optimized focus handling on panels (combo, menu buttons, color buttons, and context menu) to enhance accessibility. Fixed #10705, #10706 and #10707.
• #10704: Fixed a JAWS issue with the Select Color dialog window title not being announced.
• #10753: The floating toolbar in inline instances now has a dedicated accessibility label.