Release Notes

Updated on Feb 11, 2026

This document briefly describes the notable changes in the ThemeBuilder Web App.

11/02/2026

Features

• Enhanced support for configurations of all Kendo UI components
• Extended component part and state customization
• Support for Q1 2026 Kendo UI components

Bug Fixes

• Color variables for Q2, Q3, Q4 2024 not applied

12/08/2025

Features

• Performance improvements to dashboard loading times and operations

Bug Fixes

• Typography variable containing references to other variables is not properly compiled in Fluent theme

• Custom fonts are improperly exported with TB_ prefix

• Changing the value of any $kendo-font-size-xx variable causes error

11/20/2025

Bug Fixes

• Fix issue with untimely logout

• Update button styles and improve color consistency in various components

• Wrong behaviour when user tries to access non-allowed project

• Wrong behaviour when deleting a project from the Project page

11/12/2025

Features

• Support for Font Family variables

• Add support for Q4 2025 Kendo components

• Add support for component specific dynamic theming

10/16/2025

Bug Fixes

• Button styles for Hover, Active and other states are not applied correctly

• Project Metadata conflicts with custom components

08/26/2025

Features

• Support for Q3 2025 Kendo components

Bug Fixes

• Duplicate of default template renders additional sub-classes

• Creating a duplicate of custom configuration does not add custom CSS class

08/14/2025

Features

• Improved mappping between Figma and ThemeBuilder variable modes

08/13/2025

Features

• Conversational mode for dynamic theming

• Dark mode for the ThemeBuilder app

05/21/2025

Features

• Dynamic Theme Generation

Bug Fixes

• Enable support for URL in external CSS

• Allow Figma export to respect the code syntax value

• SCSS export is incorrect when using Fluent theme

03/26/2025

Bug Fixes

• Values of metric variables cannot be changed using the same metric unit as the default one

• Added missing icon input for non-editable icon

• Added !default to the $ki-font-icon-url variable (when Font Icons are used)

• The app crashes when modifying the Kendo Material Q1 2025 theme in Advanced Edit mode.

• Automatic migration fails when migrating R3 2023 and Q1 2024 projects to the Q1 2025 theme.

• Styles with typography variables are placed on top in the compiled CSS

• The "Drawer Item - Mini" template is detached from the "Drawer - Mini" template

02/12/2025

Features

• Add support for Q1 2025 Kendo components

• WCAG & Web Content Accessibility improvements in ThemeBuilder

• Add functionality for overriding existing variables in ThemeBuilder during export from Figma

• Improve client-server communication when using variable modes in the web app project settings

• Add links to the figma plugin

• Project backups are not deleted when migration fails

• Implement "Give Feedback" functionality

Bug Fixes

• Re-synced Figma variable not properly updated after variable name change

• Missing imports from index.sccs when using "Export Selected"

• Automatic migration to Q4 2024 leads to broken effect variable references (web-app error only)

• Generated styles for TileLayout > Tile Layout Item (div) have an additional .k-cursor-grab selector

• ThemeBuilder Q4 2024 wrong order of the generated SCSS/CSS files

• Generated CSS/SCSS for the MultiColumnComboBox contains obsolete .k-list-container.k-combobox-popup classes

• Validation allows a space before the left parenthesis for gradients

• Non-Kendo projects request swatches from server

• ThemeBuilder swatch does not contain all default Kendo Theme styles

• Changing the swatch applies the change to all modes

• Applying effects variable to a TSO causes the styles to fail

11/13/2024

Features

• Add support for Telerik and Kendo UI components version Q4 2024

• Add support for the text-transform property in typography variables

• Add support for the new Dart-Sass-based Kendo themes

• Add support for existing native HTML elements in custom components

• Improve the partial export for Telerik & Kendo UI components

• Allow users with Pro licence to modify variables in the Variable Modes view

Bug Fixes

• Cannot create Button configuration due to a failing validation

• Fix the casing for the names of the component parts of Telerik & Kendo UI components

• Fix collisions when setting properties

• The link to the main component is missing in the Variables pane

• Wrong position for in-place hints' tooltip

• The 'Text > Advanced > Underline' option doesn't work

• The Styles Editor shows metadata IDs instead of variable names

• Renamed custom component parts are reverted when the HTML content of the custom component is saved

• Cannot export from a restored version when Kendo UI is added

• Cannot change the value of a background-image with data URL through the Styles Editor

• When a variant is renamed, the styles applied to it are not reflected in the Live Preview

• Pre-existing state colors for variants are not respected

• An error is thrown when migrating projects to 2024 Q2

• TileLayout CSS discrepancy with the source of truth

• The "Return to linked component" tooltip is not hidden when the Settings panel is open

• When a custom component contains a class that starts with a dash, the exported CSS is invalid

• ThemeBuilder does not filter the no-longer-available Kendo variables correctly during an automatic migration

• Discrepancy in the generated styles when changing swatches

• Failing import of metadata from projects with version R3 2022

• Project fails with a 'Cannot convert undefined or null to object' error during an export

• Wrong UI for the global notification after a successful start of a trial

08/07/2024

Features

• Add custom components support

• Add functionality for importing external CSS

• Add support for creating projects with previous Telerik and Kendo UI component versions

• Add grouping for the new color system variables

• Show Kendo theme names in the ThemeBuilder project

• Add tooltips for text-transform options

• Add missing time parts in DateTimePicker popup template

• Improve Grid's normal Row > Hover and Cell > Hover templates

• Add missing component parts for DatePicker & DateRangePicker—k-popup

• Add missing k-grid-aria-root component part for the Grid component

Bug Fixes

• The gap value does not accept metric varibles

• Incorrect selector for hint component

• Setting background-color on Button > Solid/Secondary sets hover globally instead just for the k-button-solid-base class

• Selected styles are not applying when scrollable is set to none in the Kendo Grid

• Wrong CSS hierarchy in Menu > Submenu template

• Custom variable groups are not persisted after export/import metadata

• Incorrect template for Menu components

• ThemeBuilder generates incorrect styles for Grid Row Hover state template

• Effect properties cannot be set to none in styles editor

• The content table of the Grid is collapsed

• Progress bar intermediate state does not validate if the background-color is deleted

• Migration is failing for the 2023R3 project

• Application crashes on component variant dill down

• Default configuration affects all buttons

• Setting properties for related components like DropDownButton and Button in specific order changes specificity

• Double entry for Button in the Select Components Dialog

• AIPrompt theme styles are not exported in partial export

• Fix inconsistent styling behavior between Solid/Secondary and the other Button templates

• Incorrect rendering for the icon of the Menu component

05/15/2024

Features

• Add support for Telerik and Kendo components version Q2 2024

• Add styling support for all variants of the Button and TextBox components

• Implement the new Kendo color system

• Allow customization of prefixes for ThemeBuilder variables

• Add an AIPrompt component with advanced editing in the ThemeBuilder

• Use full theme import in ThemeBuilder exported styles

Bug Fixes

• The DropDownButton component part link to main component (Input) does not work

• ThemeBuilder web application generates corrupted property selector

• Default theme does not bind primary color correctly to all components

• Editing metric variables when a metric mode is applied crashes the application

• ThemeBuilder produces different zero-width space character in the compiled CSS

• Styles set with !important in the Kendo theme are not overwritten by ThemeBuilder

• Changed Kendo variable is not updated in all related components

• Kendo variables are not applied for all components

• Border spacing property values not applied

• FloatingAction Button parts cannot be selected

• Create project button is not centered vertically

• Drag handle for components parts is very small

04/01/2024

Features

• Add Styles Code Editor

• Enable the uploading of multiple font files for a single font-family

• Add search in the modes settings screen

Bug Fixes

• Exported SCSS cannot be compiled when using font icons and no project binary file resolution

• Remove .k-dialog-wrapper class from dialog template

• After two consecutive variables exports from Figma to one and the same TB project, the project cannot be loaded anymore

01/31/2024

Features

• Allow users to export variables and modes from Figma

• Expose Kendo theme variables per component

• Create templates for generic HTML elements

• Add support for version Q1 2024 of the Telerik and Kendo components

• Implement name collision resolution during export of Figma styles

• Add ability for styling the collapsed state of the whole Expansion Panel component

Bug Fixes

• CheckBoxLabel is wrapped inside k-checkbox-wrap element

• Fonts with ThemeBuilder prefixes are displayed but not installed

• DateRangePicker is not positioned in the clickable area

• Fix the broken styling of the premium features dialog for trial users

• Increase specificity for the Tooltip component

• Editing a Kendo variable description after editing the value reverts to the original value

• The TextBox component parts are missing the Button sub-component

• Add elipsis to the pill for the active mode if the name is too long

• Add Current template for the Stepper's Step part

01/03/2024

Features

• Add functionality for exporting the CSS and overrides for the selected components

• Performance improvements: load only one frame after drill down action

• Add option to style the Collapsed state of the whole ExpansionPanel component

• Add Button sub-component parts in the TextBox component template

• Enhance the email notifications by including the email address of the user who shares the project

• Update the Readme file in the generated output to contain information about all technologies

• Add Focus template for the ExpansionPanel Header

Bug Fixes

• Default effects for FAB cause the SCSS generation to fail

• Filter Row styles in the Grid component template are rendered with an obsolete .k-clear-button-visible class

• The pager template has the wrong drop-down in the template

• The Stepper > Step part should have Current template

• Material Theme uses wrong shadow values

• ComboBox Clear icon is not available for customization in the Default state

• MultiSelect Clear icon cannot be customized in ThemeBuilder

11/16/2023

Features

• Allow trial users to log and export styles and icons from Figma

• Save all selected components from the Live Preview per user

• Improve the Buy Now dialog by adding the reason for opening

• Add descriptive message when users try uploading fonts above 3 MB

Bug Fixes

• ComboBox Clear icon is not available for customization in the Default State

• MultiSelect Clear Icon cannot be customized in ThemeBuilder

• Wrong @progress/kendo-font-icons reference in exported package

• Setting typography token clears CSS props customizations

• Using mixed effect variable in the Fluent theme project throws an error on export

• Background Editor with linear-gradient set to initial throws error

• Back button in the Onboarding Panel has the wrong hover state

• Migrating the variants of the CheckBox component leads to wrong selectors

• Automatic migrations fails for SplitButton changes

10/11/2023

Features

• Add support for Telerik and Kendo components R3 2023 version

• Add advanced editing for Breadcrumb

• Add advanced editing for TileLayout

• Add advanced editing for Popover

• Add advanced editing for Filter

• Add advanced editing for Conversational UI

• Add advanced editing for ScrollView

• Add advanced editing for Skeleton

• Add advanced editing for Form

• Allow users to add negative values in metrics inputs

• Add support for Kendo WebComponents font npm package for R3 2023 project versions

Bug Fixes

• Error when selecting the active state of the Solid Secondary Button

• Effects are not applied when using variables in the Flat Button component

• Font management cannot be accessed from the typography font-family editor

09/15/2023

Features

• Add functionality for styling SVG icons for R2 2023 project versions

• Add support for Non-Scrollable grid in the ThemeBuilder

Bug Fixes

• Changing variable value doesn’t update the canvas

• Floating action button templates loading attempt is made for older version projects

• Updating the Cell styles doesn't affect the Row template in Grid

• Add tooltip for templates that are present in a newer version of the components

• Multi-select component hover state styles inheritance

• Grid component grouping row close button hover state styles

08/01/2023

Features

• Add support for the Kendo Classic theme

• Update the UI of the Create New Project screen

Bug Fixes

• Automatic migration UI can be shown when subscription requirements are not met

• Opening the EDIT COLOR dialog for a solid color variable after opening the EDIT COLOR dialog for a gradient color blocks the displaying of the editor for the solid color variable (it appears partially).

• Wrong additional class for the Calendar component's table

• Changing a variable doesn't update the components canvas

• Invalid values for max-width and max-height are allowed in the PROPERTIES editors

• The EDIT dialog for a given variable doesn't open if another EDIT dialog is already shown

• Remove an obsolete selector from the icons of the Pager component

• Custom color variables cannot be used for effects in Fluent

07/06/2023

Features

• Allow free users to migrate Kendo variables between versions

• Add advanced editing for FloatingActionButton

• Add advanced editing for ColorGradient

• Add advanced editing for FlatColorPicker

• Add advanced editing for ColorPalette

• Add advanced editing for ColorPicker

• Add advanced editing for MultiSelectTree

• Add advanced editing for MultiColumnComboBox

• Add advanced editing for ExpansionPanel

• Add advanced editing for ListBox

• Add advanced editing for BottomNavigation

Bug Fixes

• Adding a new variables category collapses the last one

• Exporting a lot of icons in the plugin throws an error

• When a project is deleted from within the project, the app sends an obsolete request

• Exporting an effects variable with a custom color twice causes the Sass not to compile

• Importing metadata with TSO without CSS properties throws an exception

• Fluent Theme Styles pane shows empty Colors category when filtered

• Checkbox disabled state produces invalid classes

06/06/2023

Features

• Add support for R2 2023 of the Telerik and Kendo UI components (Kendo themes v 6.4.0) when creating new projects

• Automatic updates to the latest version of the Kendo Themes and Kendo and Telerik components

• Figma import for design tokens, such as colors, typography, and effects

• Figma import for custom fonts generated from SVG icons in the design document

• SSO login

• Access rights for shared projects

• Improve the UI for the variables pane

• Add, Edit, and Delete custom variables groups

• Save expanded/collapsed variables groups per user

• Create smart linking between ThemeBuilder variables

• Add the supported theme version number in the compiled CSS file

• Implement new UI of the dashboard page design

Bug Fixes

• Remove .k-datepinput part from the DatePicker templates

• Multiple import errors thrown during manual migration

• Changing default effect tokens in CSS-based themes doesn't update the component styles

• Extends are not applied on live components using ::state

• MultiSelect popup items cannot be styled via Constructive Elements

• Typography/Effect is not shown in the editor when set in inherited style

• Undo-Redo actions cause duplication of previously edited variables

• Effect variables with shadows which have a color variable for the shadow color break the project when duplicating

• DropDownList select part cannot be edited in hover state

• Variables are not supported in the Border Spacing editor

• Duplicated arrows in property grid in Safari

• Error notification appears on project not found page

• Setting background to solid button changes the backgrounds of all buttons in the Fluent theme

04/19/2023

Features

• Add Effects variables in ThemeBuilder

Bug Fixes

• Customising input overrides customized date inputs and dropdowns

• Series colors are not applied on charts in the Fluent theme

• Undo-Redo actions cause duplication of previously edited variables

• Splitter collapsed splitbar templates are wrong

03/15/2023

Features

• Add support for Kendo UI for jQuery components

• Add support for Telerik UI for ASP.NET Core components

• Add support for Telerik UI for ASP.NET MVC components

• Add support for Telerik UI for PHP components

• Add support for Telerik UI for JSP components

• Add templates for all variants of dialog action buttons

• Add support for login with SSO

Bug Fixes

• Import metadata containing theme style overrides without extends fails

• TreeList editable row has component parts not visible in the tree

• Selecting Calendar Table::After crashes the app

• ProgressBar component cannot be drilled down

• AutoComplete close icon is not editable

• Link from DropDownTree Selected-Focused is wrong

• TextGroup is closed in multiplayer

• Non-variable changes to the border-radius are not persisted in the editor for the normal Badge

• Logical CSS properties are not correctly displayed in the Property Grid

• Changing variable name and clicking the description closes the popup and applies the update

• Exported metadata for projects with a lot of changes cannot be imported

02/09/2023

Features

• Migrate styles between projects with a different version of Telerik and Kendo UI components

• Style the input in Grid Edit Cell

• Label with Kendo theme version information

Bug Fixes

• Unit input editor sets invalid value

02/02/2023

Features

• Add support for R1 2023 of Telerik and Kendo UI components (Kendo themes v 6.0.3) when user creates new project

• Add TextBox component in advanced editing for projects created with R1 2023 version of Telerik and Kendo UI components

• Add ListView component in advanced editing for projects created with R1 2023 version of Telerik and Kendo UI components

• Add TreeList component in advanced editing for projects created with R1 2023 version of Telerik and Kendo UI components

• Add Upload component in advanced editing for projects created with R1 2023 version of Telerik and Kendo UI components

• Add External Drop Zone component in advanced editing for projects created with R1 2023 version of Telerik and Kendo UI components

• Add AppBar component in advanced editing for projects created with R1 2023 version of Telerik and Kendo UI components

• Add ProgressBar component in advanced editing for projects created with R1 2023 version of Telerik and Kendo UI components

• Add Loader component in advanced editing for projects created with R1 2023 version of Telerik and Kendo UI components

• Add GridLayout component in advanced editing for projects created with R1 2023 version of Telerik and Kendo UI components

• Add Editor component in advanced editing for projects created with R1 2023 version of Telerik and Kendo UI components

Bug Fixes

• Selecting Local Text Properties closes the editor

• Add Child Item Level 2 as editable items in the PanelBar

• Wrong DropDownTree disabled item template

• Implicitly using custom fonts from the default-typography is not applied

01/18/2022

Features

• Support for custom fonts and font icons, enabling fully custom typography and easy customization of icons inside the components

• Add a SELECT AN ICON dialog to the Content editor allowing to choose an icon from an uploaded font

• Move the Icon property editor to the Text section and rename it to Content

• Integrate the ThemeBuilder login with the telerik.com login form

• Add a search box above the property grid to filter CSS properties

• Add clip to overflow Editor

• Update 'do not have permissions' screen

• Add 404 page

• Add focused state to the tabs items

• Expose the $body-bg variable for the Fluent and Material themes

Bug Fixes

• Changes to the popup menu or popup container are not applied to the Pager' dropdown popup

• Setting effects after resetting an editor doesn't work

• Notification emails for shared projects are blocked because of DMARC rules

• Box shadow with deleted input causes the export to fail

• Longer invalid values overlap with the invalid value icon

• Typography tokens are not exported correctly

• Wrong styles are generated during export

• unset, initial, and inherit options in kendo variables cause the project to break

• Updating the body-bg variable crashes the application

• Deleting metric variables crashes the app

• Palettes and Typographies allow dragging arbitrary elements over them

• The Badge component is not positioned well in Advanced Edit mode

• Fix UI glitches for list items and select pop-ups

• Dialogs in the Scheduler can be opened in Live Preview

• The Effects editor closes unexpectedly

• Fix wrong paddings for the Panel header

• When the THEME STYLES pane is resized and users drill down and then return, the pane changes its size

• Application crashes when project is deleted from the project page

• Fix the gap between notifications

• Resizing the LIVE PREVIEW panel throws an error

• The Try Again function does not work after the user has been logged out

• Temporary notifications override permanent ones

• Outline advanced settings popup goes out of the page when scrolling

• The Content editor doesn't update when an icon is changed

• The Edit variable window doesn't close when clicking on THEME STYLES

• Error is thrown on reset change

• Duplicated padding on export

• User cannot select disabled component parts

• The onboarding hint for Advanced Edit is misaligned

11/09/2022

Features

• Add support for metric variables that consist of a number and a metric unit, for example 10px, 10em, or 10%—applicable to specific properties in the property grid

Bug Fixes

• Close opened dialogs for variables when new variable option is selected

• Setting text color does not color the first button of a ButtonGroup

• Empty selector generated when changing icon for DateTimePicker

• DateRangePicker cannot style the :placeholder element

• Date and Time inputs' Placeholder template does not lead to Live Preview where the Placeholder can be seen

• Missing selector for focused, hovered, and active states

• When a variable is used in the effects editor, it can be deleted by the user

• Custom Variable Editor resets its position when the type is changed

• Wrong templates in the Material theme Calendar

• Panelbar items icons must not be editable

• Cannot open constructive elements for SplitButton and navigate to them

10/20/2022

Features

• The new Fluent Theme is here. Now you can use the Fluent theme as a starting point and add your customizations on top of it. That is great for everyone with a style guide or design system based on the Fluent design.

• Introduce per component drill-down URL for direct navigation to components states

• Add support for numbers in the names of custom Sass variables

• Improve tab navigation in Property Editors

• Improve property editors advanced settings windows positioning

• Unify the UI of windows and buttons in the application

• Add JS import instructions in exported package README

Bug Fixes

• The status item icon in the toolbar does not work when the user changes variables

• Previous project is opened after sign out and then sign in

• ThemeBuilder reports multiple users when only one user is logged in

• SVG background-image crashes the app

• Color sample is not updated on referenced variables

• Gradient color variable cannot be set as background

• Gradient color variables are saved as solid

• Invalid customizations are applied on untouched components in Angular

• Property Grid editors are constantly re-rendered for no reason

• Validation allows incomplete hex and RGB values

• Add missing container element part in the menu items

• When the filter string for the variables pane is deleted, the groups are collapsed

• Cannot create gradient color variable that references already created one

• Setting Layer Blur effect metric doesn't work

• When using the enter key to add a new variable, it is added without name

• When the input border color is changed in the Material theme, the export throws an error

09/14/2022

Features

• Add login with Telerik account functionality

• Add functionality for creating, duplicating, and deleting projects

• Add support for choosing to customize the Kendo Default, Bootstrap, or Material theme during project creation

• Add functionality for sharing projects with teammates

• Add Theme Styles pane which lists top level Kendo Theme variables for Color, Typography, and Border Radius

• Add functionality for adding new variables

• Add functionality for editing variables

• Add functionality for loading predefined color swatches

• Add functionality for importing variables from previous ThemeBuilder

• Add undo and redo functionality for changes made in the Theme Styles pane

• Add Advanced Edit canvas with zooming, panning, and scrolling

• Add drill down functionality to drill down to component states

• Add Components Parts pane which shows the component’s editable elements

• Add Property Grid pane with styles editors

• Add support for styling latest Kendo and Telerik React components (R3 2022)

• Add support for styling latest Kendo and Telerik Angular components (R3 2022)

• Add support for styling latest Kendo and Telerik Blazor components (R3 2022)

• Add support for styling latest Kendo and Telerik Vue components (R3 2022)

• Add Button component

• Add ButtonGroup component

• Add Chip component

• Add ChipList component

• Add DropDownButton component

• Add SplitButton component

• Add Toolbar component

• Add Input component

• Add NumericTextBox component

• Add MaskedTextBox component

• Add Checkbox component

• Add RadioButton component

• Add Switch component

• Add Rating component

• Add Slider component

• Add TextArea component

• Add Labels component

• Add Hint component

• Add Error component

• Add DateInput component

• Add Calendar component

• Add DatePicker component

• Add MultiViewCalendar component

• Add DateRangePicker component

• Add TimePicker component

• Add DateTimePicker component

• Add Autocomplete component

• Add DropDownList component

• Add ComboBox component

• Add MultiSelect component

• Add DropDownTree component

• Add Menu component

• Add Drawer component

• Add Avatar component

• Add Tabstrip component

• Add Card component

• Add PanelBar component

• Add Window component

• Add Dialog component

• Add Pager component

• Add Grid component

• Add Scheduler component

• Add Badge component

• Add Tooltip component

• Add Notification component

• Add TreeView component

• Add Stepper component

• Add Splitter component

• Add Floating Label component

• Add Radio Group component

• Add Export functionality for exporting the custom styles as an npm package

• Add precompiled CSS with custom styles in the exported package

• Add SCSS files with custom styles and variables in the exported package