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Accessibility Overview

The UI for Blazor Window component is WCAG 2.2 AA and Section 508 compliant. The component also follows the WAI-ARIA best practices for implementing the keyboard navigation for its component role, and is tested against the popular screen readers.

Blazor Window Accessibility Example

WCAG 2.2 introduces the "Dragging Movements" criterion as an important part of the Operable principle. Its primary goal is to guarantee that any feature reliant on drag actions offers an alternative method that can be executed with a single click, enhancing user accessibility.

The illustrative example below shows the window resize action, achievable through the Dialog and window position change through a button. Telerik UI for Blazor to offer a versatile API that allows users to trigger all functions programmatically or externally, meeting diverse accessibility requirements for any applications.

The following example demonstrates the accessibility compliance of the Window component. The described level of compliance is achievable with the Ocean Blue A11y Accessibility Swatch.

Window accessibility compliance example

@*Evaluate the example with Axe Core or another accessibility tool*@

    .resize-button {
        margin-left: 27px;

    .window-container {
        position: fixed;
        width: 100vw;
        height: 100vh;
        z-index: 9999;

<div @onclick="@HandleWindowPosition" class="window-container">
    <TelerikWindow @bind-Visible="@WindowIsVisible"
                   Width="@(WindowWidth + "px")"
                   Height="@(WindowHeigh + "px")"
            <span class="k-window-title">WCAG 2.2 Compliance</span>
                    To move the Window, click the
                    <TelerikSvgIcon Icon="@SvgIcon.ArrowsMove"></TelerikSvgIcon> icon and then
                    click anywhere on the screen.
                <li>Click the "Resize Window" button and enter the new dimensions.</li>
            <TelerikButton AriaLabel="Open Resize Dialog" Class="resize-button" OnClick="@(() => DialogVisible = true)">Resize Window</TelerikButton>
            <WindowAction Title="Change Position" OnClick="@(()=> ShouldMove = true)" Icon="@SvgIcon.ArrowsMove" />
            <WindowAction Name="Minimize" />
            <WindowAction Name="Close" />

    <TelerikDialog @bind-Visible="@DialogVisible"
            New width:
            <div class="resize">
                <TelerikNumericTextBox AriaLabel="Set New Width" @bind-Value="NewWidth" Min="0" Format="## pixels" />
            New height:
            <div class="resize">
                <TelerikNumericTextBox AriaLabel="Set New Height" @bind-Value="NewHeight" Min="0" Format="## pixels" />
            <TelerikButton AriaLabel="Confirm Resize" OnClick="@ApplyResize" ThemeColor="@ThemeConstants.Button.ThemeColor.Primary"><TelerikSvgIcon Icon="@SvgIcon.Check" /><span style="margin-left: 5px;">Resize</span></TelerikButton>
            <TelerikButton AriaLabel="Cancel Resize" OnClick="@(() => { DialogVisible = false; })"><TelerikSvgIcon Icon="@SvgIcon.Cancel" /><span style="margin-left: 5px;">Cancel</span></TelerikButton>

@if (!WindowIsVisible)
    <TelerikButton AriaLabel="Open Window" OnClick="@( () => WindowIsVisible = !WindowIsVisible )">Open window</TelerikButton>

    .resize {
        display: flex;
        flex-direction: row;
        gap: 10%;

@code {
    private bool ShouldMove {get; set;}
    private bool WindowIsVisible { get; set; }
    private bool DialogVisible { get; set; }

    private string WindowTop = "100px";
    private string WindowLeft = "50px";

    private int WindowWidth = 450;
    private int WindowHeigh = 220;

    private int NewWidth { get; set; } = 450;
    private int NewHeight { get; set; } = 220;

    private void ApplyResize()
        WindowWidth = NewWidth;
        WindowHeigh = NewHeight;

        DialogVisible = false;

    private void HandleWindowPosition(MouseEventArgs e)
        if (ShouldMove)
            WindowTop = e.ClientY + "px";
            WindowLeft = e.ClientX + "px";

            ShouldMove = false;

See also

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