Last Updated: 31 Jul 2019 08:40 by ADMIN

The problem happens when enter a period . , single ' or " double quote on a new line.

Last Updated: 02 Oct 2019 14:29 by ADMIN
Test the code below on iPhone and mobile chrome/safari and you'll get a JS error:

<script type="text/javascript">
    EditorCommandList = Telerik.Web.UI.Editor.CommandList;
    EditorCommandList["ApplySizeColor"] = function (commandName, editor, args) {
        if (editor.getSelectionHtml() != "") {
  "FontSize", { value: "4" }); //fire the FontSize command
  "ForeColor", { value: "red" });  //fire the ForeColor command
        else {
            alert("Please, select some text!");
<telerik:RadEditor ID="RadEditor1" runat="server" RenderMode="Auto" NewLineMode="Br" ContentAreaMode="Div" Height="500" Width="100%" Skin="Metro" _OnClientCommandExecuting="OnClientCommandExecuting">
        <telerik:EditorHeaderTool Name="ApplySizeColor" />
        <telerik:EditorHeaderTool Name="Redo" />
        <telerik:EditorHeaderTool Name="MobileEdit" Position="Right" />
        <telerik:EditorHeaderTool Name="ToggleScreenMode" Position="Right" />
                <telerik:EditorTool Name="ApplySizeColor" Text="Apply Size and Color" ShowText="true"></telerik:EditorTool>
Last Updated: 18 Apr 2019 11:21 by ADMIN
Code snippets coming after remove table style from insert table popup in chrome,ie,ff.

I am facing a big problem in editor please give any solution.


Steps to reproduce

Step 1

Try to insert table from Insert Table from editor toolbar.

Step 2

Right click on cell then click on Table/cell properties. A table wizard popup will come.

Step 3

Click on Table Layouts tab on the table wizard popup.

Step 4

Select any value from table styles drop down.

Step 5

Now you can see  TABLE>TR>TD>RemoveElement on the bottom of the on RemoveElement .

After click on RemoveElement you can see STYLE>RemoveElement  again click on RemoveElement.

then you can see like below in the editor.

.telerik-reTable-2 { border-collapse: collapse; border: solid 0px; font-family: Tahoma; } .telerik-reTable-2 tr.telerik-reTableHeaderRow-2 { border-width: 1.0pt 1.0pt 3.0pt 1.0pt...........
Last Updated: 09 Apr 2019 13:17 by ADMIN
Created by: Aaron Main
Comments: 1
Category: Editor
Type: Bug Report
When you open the insert Table dialog window in the RadEditor using the Silk skin the layout is messed up.  Button text is wrapping and the text 'px' is wrapped under the input field.

You can see this happening in the following demo page.

I have also attached a snip showing this.
Last Updated: 10 Apr 2019 15:23 by ADMIN

After upgrading the Telerik controls to v2019.1.115.45 we are seeing an issue with the RadEditor control. The issue is that the Toolbar formatting buttons like Bold, Underline etc. do not work for a particular scenario.


We have 2 tabs - Tab1 and Tab2. Tab1 is the default selected tab. Tab2 contains the RadEditor control. When the page loads, Tab1 is displayed/selected. We then go to Tab2 and click on the Toolbar to format the text. We click on buttons like Bold, Italic etc. but they do not work. Please refer to the files in the attached zip to see the issue.
<telerik:RadTabStrip runat="server" MultiPageID="MultiPage1" CausesValidation="false" SelectedIndex="1">
        <telerik:RadTab runat="server" Text="Tab1" Value="Tab1" PageViewID="Tab1" Selected="true" />
        <telerik:RadTab runat="server" Text="Tab2" Value="Tab2" PageViewID="Tab2" />
<telerik:RadMultiPage ID="MultiPage1" runat="server">
    <telerik:RadPageView ID="Tab1" runat="server" Selected="true">
        TAB 1 
    <telerik:RadPageView ID="Tab2" runat="server">
        <telerik:RadEditor Width="100%" ID="ERichTextBox1" Enabled="true" runat="server" ContentAreaMode="Div" NewLineMode="Br">

Last Updated: 18 Mar 2019 12:47 by ADMIN
We've a RadEditor controls, we want disable editting in mobile render mode. How can we do it?

Here examle:

Case 1. RadEditor is LightWeight:

<telerik:RadEditor ID="redEdt" runat="server"    RenderMode="LightWeight"     Width="100%" Height="500px" ></telerik:RadEditor>

                $(document).ready(function () {
                    var editor = $telerik.findControl(document.documentElement, "redEdt");


--> It work great. All buttons in toolbar disabled.

Case 2. RadEditor is Mobile:

<telerik:RadEditor ID="redEdt" runat="server"    RenderMode="Mobile"     Width="100%" Height="500px" ></telerik:RadEditor>

                $(document).ready(function () {
                    var editor = $telerik.findControl(document.documentElement, "redEdt");


--> System error: 

M.enableContextMenus is not a function
    at c.RadEditor.enableEditing
Last Updated: 29 Mar 2019 12:44 by ADMIN
Created by: Victor
Comments: 15
Category: Editor
Type: Bug Report


The RadEditor's Design View became unusable in the latest Chrome Beta version (Version 73.0.3683.27). It is still working correctly on the latest stable Chrome 72, so I'm not sure if it is a problem that needs to be resolved on Chrome's end, just figured it'll be helpful to send this in as well. 

The HTML view still works, but switching back to Design causes an exception (attached). This is also directly off of the demo page, so it doesn't look like implementation is a factor. 

Last Updated: 19 Mar 2019 14:19 by ADMIN


  1. Create a page with a basic Rad Editor, with HTML mode enabled
  2. Go into HTML Mode, add at least the following:
    <input type="number" />
  3. Go back to Design Mode
  4. Click on the numeric input

To See the Problem:

  1. In the console of the Browser's Developer Tools, get a reference to the Rad Editor
  2. Call its getSelectedElement() function
  3. In Chrome, the returned element will be a <body> tag (NOT GOOD)
  4. In Firefox, it will be an apparently random (maybe the first?) user-selectable element within the HTML (NOT GOOD)
  5. In IE11, it will be the numeric input (DESIRED)
  6. In Edge, it will be a <body> tag (NOT GOOD)
Last Updated: 11 Feb 2019 10:07 by ADMIN

I've been trying to upgrade an existing solution to use the latest release version (2019) of the Telerik UI for ASP.NET AJAX and have encountered a major problem with the 'Tool Provider', a technique which is significantly used in my solution.  This same error displays in your own Telerik Demo.  Details are:


Description of the issue

Having multiple RadEditors on the same page, and trying the property "ToolProviderID" (to reuse the same floating tool amongst the different editors on the same page), causes a "javascript exception" on the client side.

URL of the Demo (Telerik Website)

Exception description

Uncaught TypeError: R.get_canAcceptTrackChange is not a function at c.RadEditor._initializeToolProvider (RadEditor.js:8239) at c.RadEditor.initialize (RadEditor.js:8297) at c.RadEditor.endUpdate (Telerik.Web.UI.WebRe597d4b%3ab25378d2:6) at Sys._Application.endCreateComponents (Telerik.Web.UI.WebRe597d4b%3ab25378d2:6) at Sys.WebForms.PageRequestManager._scriptsLoadComplete (Telerik.Web.UI.WebRe97d4b%3ab25378d2:15) at Sys.WebForms.PageRequestManager.<anonymous> (Telerik.Web.UI.WebRe597d4b%3ab25378d2:6) at Telerik.Web.UI.WebRe597d4b%3ab25378d2:6 at Sys._ScriptLoader._loadScriptsInternal (Telerik.Web.UI.WebRe97d4b%3ab25378d2:15) at Sys._ScriptLoader._loadScriptsInternal (Telerik.Web.UI.WebRe97d4b%3ab25378d2:15) at Sys._ScriptLoader._loadScriptsInternal (Telerik.Web.UI.WebRe97d4b%3ab25378d2:15)

How to reproduce the error (on Telerik demo website)

    - Mark the checkbox at the bottom of the page and click on "Update":

(the error can be seem on console, pressing F12)

Error message happening in our system

RadEditor.js:8239 Uncaught TypeError: R.get_canAcceptTrackChange is not a function at c.RadEditor._initializeToolProvider (RadEditor.js:8239) at c.RadEditor.initialize (RadEditor.js:8297) at c.RadEditor.endUpdate (Telerik.Web.UI.WebRe597d4b%3ab25378d2:6) at Sys._Application.endCreateComponents (Telerik.Web.UI.WebRe597d4b%3ab25378d2:6) at Sys._Application._raiseInit (Telerik.Web.UI.WebRe597d4b%3ab25378d2:6) at Sys._Application.initialize (Telerik.Web.UI.WebRe597d4b%3ab25378d2:6) at b (Telerik.Web.UI.WebRe597d4b%3ab25378d2:6) at HTMLDocument.a (Telerik.Web.UI.WebRe597d4b%3ab25378d2:6)

Sample code, causing the issue (our system)

Refer the attached image.

Last Updated: 08 Mar 2019 10:04 by ADMIN

I am using Telerik.WEB.UI version: 2018.1.117.45 in my website. I am getting as issue in RADEditor control when I create a hyperlink within Editor. Right clicking on that hyperlink opens a context menu, when I click on properties from the context menu, it opens an 'Image Manager' instead of 'Hyperlink Manager'.

The issue is occurring only in IE 11, rest all the browsers are opening 'Hyperlink Manager'. Please advise.

Thank you

Last Updated: 08 Mar 2019 09:45 by ADMIN

There's a bug in the RadEditor WordListConverter convert method.  See the attached image for details.  Note that the variable z is initialized and treated as an array (a stack, actually, with its items being pushed in and popped out).  However, perhaps because of a naming scope failure in the js-minifier, the z variable is, under certain conditions, set equal to an HTMLCollection, so a subsequent z.push method call fails.

This sample Word document reproduces the error.  It is admittedly full of bad list formatting, because it began life as a PDF, but it does exercise the RadEditor code in a way that causes the problem.  Select and copy its content and paste it in the RadEditor demo page here:

Click OK to "clean" the pasted content and note that nothing appears because of the error shown in the attached image.

Verified in the latest Chrome and FF builds on Windows 10.

Last Updated: 29 Jan 2019 11:22 by ADMIN
Inconsistent Behavior of RadEditor with Ribbon Bar Toolbar for a different type of dropdown toolbar controls.

In RadEditor with Ribbon Bar Toolbar, there are two different types of drop-down control observed.

Type1 includes "Paste" and "Strip All Formatting" 
Type2 includes "Font Name", "Real font size", "Foreground Color", "Background Color", "Apply CSS Class", "Paragraph Style" and "Undo"

In RadEditor with Ribbon Bar Toolbar When "Type 1" Dropdown is opened or expanded and we click on any "Type 2" Dropdown then "Type 1" dropdown is still remain open or expand.

vice versa In RadEditor with Ribbon Bar Toolbar When "Type 2" Dropdown is opened or expanded and we click on any "Type 1" Dropdown then "Type 1" dropdown is still remain open or expand.
Last Updated: 20 Dec 2018 17:18 by ADMIN
After performing some tests with images using the RadEditor I have found that when selecting the class to apply in the image properties dialog, it will not let you clear the class. When choosing the clear class option from the drop down it does not change the class of the image it will keep the same class that is already applied from the drop down.
Last Updated: 07 Nov 2018 17:06 by ADMIN
If RadEditor is initially hidden with display:none, its tools do not work when displayed in Firefox 62.0:

<div style="display: none" id="hiddenWrapper">
    <telerik:RadEditor ID="RadEditor1"  runat="server"></telerik:RadEditor>
    function f() {
        $get('hiddenWrapper').style.display = "block";

There is a warning error in the console: "Mutation Events is deprecated and to use MutationObserver".

The fix is to call the $find("RadEditor1").onParentNodeChanged(); method to recreate the content area:

<div style="display: none" id="hiddenWrapper">
    <telerik:RadEditor ID="RadEditor1"  runat="server"></telerik:RadEditor>
    function f() {
        $get('hiddenWrapper').style.display = "block";
Last Updated: 26 Dec 2018 08:57 by ADMIN
Created by: Vessy
Comments: 1
Category: Editor
Type: Bug Report
Likely to happen when an element is empty, not just the editor, if you can get the cusros in an empty <p>, and press backspace you can get the same behavior, it can happen as you work on some content

Steps to reproduce:

1. Go to the Editor demo page in Chrome
2. CTRL+A on the editor and hit delete
3. Hit Delete or Backspace again

Result: Uncaught TypeError  Cannot read property 'nodeType' of undefined Appears in the console
Last Updated: 10 Apr 2019 14:55 by ADMIN
Created by: Rumen
Comments: 4
Category: Editor
Type: Bug Report
The image manager dialog do not resize properly in Chrome when the screen resolution is 1920x1080 and the Windows zoom level is 125%-150%-175%.

In Internet Explorer, all dialogs have scrolls - tested on 4k screen with 150% zoom.

See the attachments.


    function OnClientCommandExecuted(editor, args) {
        if (editor.get_dialogOpener()) {
            var commandName = args.get_commandName();

            if (editor.get_dialogOpener()._getDialogContainer) {
                dialogReference = editor.get_dialogOpener()._getDialogContainer(commandName);
                setTimeout(function () {
                    var dialogContainerHeight = parseInt(editor.get_dialogOpener()._getDialogContainer(commandName).get_contentElement().style.height);
                    dialogReference.set_height(dialogContainerHeight + 40);
                    dialogReference.get_contentElement().style.height = dialogContainerHeight + 5 + "px";
                }, 1000);
<telerik:RadEditor ID="RadEditor1" runat="server"  OnClientCommandExecuted="OnClientCommandExecuted">
    <ImageManager ViewPaths="~/" />

Last Updated: 15 May 2019 09:05 by ADMIN
Can be reproduced with the code below:

<telerik:RadEditor runat="server" ID="RadEditor1" >
   Here is sample content!
<input type="button" value="Set Focus On RadEditor" onclick="SetFocusOnRadEditor(); return false;" />
<script type="text/javascript">
    function SetFocusOnRadEditor() {
        var editor = $find("<%=RadEditor1.ClientID%>"); //get a reference to RadEditor client object
            editor.setFocus(); //set the focus on the the editor

The problem is not reproducible when the ContentAreaMode is set to DIV or in the other browsers.


<telerik:RadEditor runat="server" ID="RadEditor1">
    Here is sample content!
<button type="button"  onclick="SetFocusOnRadEditor()">Focuse On RadEditor</button>
<script type="text/javascript">
    function SetFocusOnRadEditor() {
        var editor = $find("<%=RadEditor1.ClientID%>");
        if ($telerik.isChrome) {
            var iframe = editor.get_contentAreaElement();
        else {
Last Updated: 28 Mar 2019 16:44 by ADMIN
Created by: Calvin
Comments: 1
Category: Editor
Type: Bug Report

There seems to be an issue with the "Strip Span Elements" tool when pasting content into the editor in Design mode.

I have made a screencast demonstrating the issue available here:


Open a RadEditor demo that has the "Strip Span Elements" option like the Overview( or the Right Editor in this demo(

In a word document create text that when pasted into the editor has spans, for example changing the background color or the text color. 

Copy the text from the document into the "Design" mode of the editor.
Select the text you would like to strip span's from (I used all of the text in the screencast example).

Use the "Strip Span Elements" button.

Switch the editor mode to HTML(The spans are not stripped).

Switch back to design mode.

Select the text you would like to remove spans from again.

Use the "Strip Span Elements" button. The spans are now stripped.

Expected result: Strip Span Elements option removes <span> tags from html directly after pasting into design mode.

Actual result: Strip Span Elements option does not remove <span> tags on pasted text in the design mode until you navigate to HTML mode then back to design mode.
Any help and suggestions are appreciated.


Calvin Williams
Last Updated: 01 May 2018 14:10 by ADMIN
This behavior can be observed in your production demo page of the RadEditor.

Reproduction Steps:

1. Scroll to the table under "Attractions"

2. Right click and select "Table Properties"

3. Select the "Image Manager" next to the "Back Image" textbox

4. Select anyone of your images,  I have reproduced with any of the images select "beach.jpg"

5. Click OK.  The image is now visible in the table.

6. Right click on nay cell in the table and select "Cell Properties"

7. You can make a change, or not to the cell properties, and click "OK" button at the bottom.

8. You will now see that the background image is no longer present on the table.

If you try step 8 again, and click on the "Table Properties" tab of the Table Wizard, you will see that there is no value in the "Back Image", so the "OK" is submitting the blank value.
Last Updated: 02 Sep 2019 15:19 by ADMIN
I have a Telerik RadEditor (2017.3) control with custom/unembedded skin (created using the themebuilder on telerik), and when I enter a value for the DialogsCssFile attribute, the markup of the page changes, meaning that my custom skin is not applied to the editor anymore.

Why is this a problem? Well the css inside the dialog for Find/replace for example didn't display correct, and having done some research, I needed to do some @imports into a customDialog.css file and drop that into the DialogsCssFile attribute.

As soon as I do this, the generated markup in the page for RadEditor changes from

Radeditor RadEditor_MyCustomSkin reWrapper


Radeditor MyCustomSkin reWrapper

meaning that my radeditor Skin is not applied to the editor, If I remove the DialogCssFile then the editor skin loads correctly, but the dialogs look wrong. In the Page source, the Window is a div within the page, and not an iFrame

Code :

Page CSS files (in order)

<link type="text/css" rel="stylesheet" href="/assets/css/MyCustomSkin/formdecorator.MyCustomSkin.css" />
<link type="text/css" rel="stylesheet" href="/assets/css/MyCustomSkin/toolbar.MyCustomSkin.css" />
<link type="text/css" rel="stylesheet" href="/assets/css/MyCustomSkin/window.MyCustomSkin.css" />
<link type="text/css" rel="stylesheet" href="/assets/css/MyCustomSkin/combobox.MyCustomSkin.css" />
<link type="text/css" rel="stylesheet" href="/assets/css/MyCustomSkin/dropdownlist.MyCustomSkin.css" />
<link type="text/css" rel="stylesheet" href="/assets/css/MyCustomSkin/tabstrip.MyCustomSkin.css" />
<link type="text/css" rel="stylesheet" href="/assets/css/MyCustomSkin/editor.MyCustomSkin.css" />
Main Radeditor Class (to give idea of class names)

.RadEditor_MyCustomSkin { /* css styles - all generated automatically */ }
Control :

<telerik:RadEditor runat="server" ID="pageRadEdit" ToolbarMode="Default" EditModes="Design,Html"
ToolsFile="~/App_Data/Editor.xml" Width="980px" Height="800px"
EnableResize="false" OnClientLoad="resizeMe" NewLineMode="P"
        <SpellCheckSettings DictionaryLanguage="en-GB" AllowAddCustom="false" />
            <telerik:SpellCheckerLanguage Code="en-GB" Title="English (UK)" />

@import url('FormDecorator.MyCustomSkin.css');
/*@import url('Grid.MyCustomSkin.css');*/
@import url('Input.MyCustomSkin.css');
@import url('Splitter.MyCustomSkin.css');
@import url('TabStrip.MyCustomSkin.css');
@import url('ToolBar.MyCustomSkin.css');
/*@import url('Upload.MyCustomSkin.css');*/
@import url('Window.MyCustomSkin.css');
@import url('ComboBox.MyCustomSkin.css');
@import url('Button.MyCustomSkin.css');
/*@import url('Editor.MyCustomSkin.css');*/
Note : Editor css is still using wrong class even if the bottom import is uncommented

Web.Config settings

<add key="Telerik.Skin" value="MyCustomSkin" />
<add key="Telerik.ScriptManager.TelerikCdn" value="Disabled" />
<add key="Telerik.StyleSheetManager.TelerikCdn" value="Disabled" />
<add key="Telerik.Web.UI.RenderMode" value="lightweight" />
<add key="Telerik.Web.UI.EnableEmbeddedSkins" value="false" />
<add key="Telerik.EnableEmbeddedSkins" value="false" />
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