Last Updated: 06 Jun 2016 15:29 by Andrey
Created by: akom
Comments: 1
Category: Editor
Type: Bug Report
In IE11 when we select an image and change from Design to HTML mode or try to apply any paragraph style to it, the browser gets unresponsive. 

To get a better understanding, please refer to the following videos:

Demo page:
Last Updated: 21 Jul 2015 11:58 by ADMIN
Such a scenario is reproducible when RadEditor is used in Template container and the control is AJAX-enabled. For example, in an EditTemplate or InsertTemplate. 

To workaround this bug, you need to assure that the base CSS resource is loaded before RadEditor. To do so, add manually the resource in the head element of the page:

<head runat="server">
    <telerik:RadCodeBlock ID="RadCodeBlock1" runat="server">
        <link href='<%= Page.ClientScript.GetWebResourceUrl(typeof(RadEditor), "Telerik.Web.UI.Skins.EditorLite.css") %>'
            rel="stylesheet" type="text/css" />
Last Updated: 31 Jul 2015 11:16 by ADMIN
The scenario is very specific. It is reproducible only under IE11 when RadEditor is loaded in an iframe, in Div content area mode, with AutoResizeHeight="true" and Skin is set to MetroTouch or BlackMetroTouch
Last Updated: 28 Jul 2015 08:23 by ADMIN
Deleting all content in editor (e.g.,  Ctrl+A and delete), and switching to HTML mode, an unwanted &nbsp; is always present. Whereas, the content should be empty. 
Last Updated: 08 Jul 2015 08:20 by MS
The behavior of Paste tools should be the same as in Firefox, Chrome, etc., where the clipboard access is also forbidden.
Last Updated: 16 Jun 2015 14:22 by ADMIN
The Rad Editor control removes unformatted spaces between differently-formatted words when the user presses Enter key for the first time in IE

Steps to reproduce:
    1. Go to and clear all the pre-existing text.
    2. In the empty editing area, type two words separated by a space.
    3. Select the first word but not the space after it, and apply either italics, boldness, or underlining.
    4. Select the second word but not the space before it, and apply a different one of those formatting options.
    5. Position the cursor at the end of the line, and press Enter

Result: The space between the words will vanish. Firefox users will see underlining indicating that the browser considers the new, merged word to be misspelled.
Last Updated: 12 Aug 2015 10:17 by ADMIN
Created by: Ianko
Comments: 0
Category: Editor
Type: Bug Report
Subsequent showing of an Paste HTML dialogs updates the title with some delay. 

A possible workaround is using the code from this example:

<telerik:RadEditor runat="server" ID="RadEditor1" OnClientCommandExecuted="OnClientCommandExecuted">

<script type="text/javascript">
    function OnClientCommandExecuted(editor, args) {
        var command = args.get_commandName();
        var dialogContainer = editor.get_dialogOpener()._dialogContainers;
        var dialogName = "";

        switch (command) {
            case "PasteFromWord":
            case "PasteFromWordNoFontsNoSizes":
            case "PasteAsHtml":
                dialogName = "CleanPasteHtmlContent";


    function updateTitle(sender, args) {
        var clientParameters = sender.ClientParameters;

        if (clientParameters && clientParameters.dialogTitle)

Last Updated: 03 May 2016 13:42 by ADMIN
If you try to re-format a paragraph with a link inside to a heading, the final result will be multiple headings split by the link.
Last Updated: 06 Jul 2015 11:59 by ADMIN
Web page hangs with long running script error when the Foreground color of table content is cleared in IE11.

Steps to reproduce:
1. In IE 11  Go to editor demo
2. Click HTML view and delete everything
3. Copy this into editor
                        <td style="color: #000000;">Lorem ipsum</td>
4. Go to design mode highlight some text and click on the "Foreground color" button, select the clear choice (upper left)
5. Web page hangs with long running script error.  (It has something to do with that style on the TD)
Last Updated: 29 Sep 2015 10:52 by ADMIN
Using the Image Map Editor to create a mapped area over the entire image, causes the image to be unelectable. 
Last Updated: 22 May 2015 08:19 by ADMIN
If the content contains html, head and body tags (Full HTML editing), and switching to Design mode causes a slightly slower rendering.

If the same HTML is used directly in the, the design mode renders as expected.
Last Updated: 08 Jul 2015 10:33 by ADMIN
As the selection changes when typing inside textbox, JavaScript errors are being thrown. 
Last Updated: 07 Jul 2015 14:26 by ADMIN
For example, checkboxes with plain text as labels before them do not appear selected in RadEditor:


    Checkbox: <input type="checkbox" />
Last Updated: 11 May 2015 11:59 by ADMIN
<telerik:RadTabStrip ID="RadTabStrip1" runat="server" MultiPageID="RadMultiPage1">
		<telerik:RadTab Text="tab1" Selected="true"></telerik:RadTab>
		<telerik:RadTab Text="tab2"></telerik:RadTab>
<telerik:RadMultiPage ID="RadMultiPage1" runat="server">
	<telerik:RadPageView ID="RadPageView1" runat="server" Selected="true">RadPageView 1</telerik:RadPageView>
	<telerik:RadPageView ID="RadPageView2" runat="server">
		<telerik:RadEditor ID="RadEditor1" runat="server" EnableTrackChanges="true"
			TrackChangesSettings-CanAcceptTrackChanges="true" ToolsFile="ToolsTrackChanges.xml">
				<p>paragraph 1</p>
				<p>paragraph 2</p>


<script type="text/javascript">
	$telerik.$.extend(Telerik.Web.UI.RadEditor.prototype, {
		_initEvents: function() {
			var editor = this;
			if (editor.__original__initEvents) {
			editor.add_domChange(Function.createDelegate(editor, editor._domChangedHandler));
			editor.attachInternalHandler("keypress", Function.createDelegate(editor, editor._keyPressHandler));
			editor.attachInternalHandler("keydown", Function.createDelegate(editor, editor._keyDownHandlerEnableTrackChangesOverride));
			editor.attachInternalHandler("keydown", Function.createDelegate(editor, editor._keyDownHandler));
Last Updated: 27 Apr 2015 12:55 by ADMIN
The first div element in the content is stripped out, every time a submit occurs with opened HTML tab.
Last Updated: 04 Dec 2015 18:23 by ADMIN
Last Updated: 16 Apr 2015 10:14 by ADMIN
Created by: Ianko
Comments: 1
Category: Editor
Type: Bug Report
There some issues when both features are enabled:

    - Add comment to tracked change is impossible;
    - Context menu is broken.

Last Updated: 08 Jul 2015 08:27 by ADMIN
If some textarea elements are added inside the content area, focusing and typing text inside is almost impossible. There are also cases, where the text overrides the element on typing. 

Additionally, any text input elements are difficult to be selected. It is required to click multiple times so to appear selected.
Last Updated: 24 Feb 2015 10:21 by ADMIN
Using code behind or localization file to change the text of the Design, Preview or HTML buttons break the functionality that enables the end-user to change the modes.

The following snippet can be used as a temporary workaround.

<style type="text/css">
    /* Fixes the visual glitch */
    .reModes a {
        width:auto !important;

<telerik:RadEditor runat="server" ID="RadEditor1" RenderMode="Lightweight" OnClientLoad="OnClientLoad">

<script type="text/javascript">
    function OnClientLoad(editor, args) {
        var $ = $telerik.$;
        if (editor.get_renderMode() != Telerik.Web.UI.RenderMode.Lite) return;

        var designAttr = editor.get_localization()["RadEditorDesignMode".toLowerCase()];
        var htmlAttr = editor.get_localization()["RadEditorHtmlMode".toLowerCase()];
        var previewAttr = editor.get_localization()["RadEditorPreviewMode".toLowerCase()];
        $("a[title=\"" + designAttr + "\"]").attr("title", "Design");
        $("a[title=\"" + htmlAttr + "\"]").attr("title", "HTML");
        $("a[title=\"" + previewAttr + "\"]").attr("title", "Preview");
Last Updated: 17 Nov 2015 06:49 by ADMIN
When a tool has a longer name, part of the text drops to a new line, and causes incorrect layout. 

To resolve you can use the following CSS rule:

.reDropDownBody a.reTool.reToolText {
    white-space: nowrap;