Tabs

Panels that switch with no script, or links to pages.

JavaScript off: what the HTML and CSS do on their own.

Usage

razor

<Tabs Label="Account">
    <Tab Label="Profile" Icon="Lucide.User">...</Tab>
    <Tab Label="Billing" Badge="2">...</Tab>
</Tabs>

@* Links to pages of their own. *@
<Tabs Label="Settings">
    <TabLink Href="settings/profile" Label="Profile" />
    <TabLink Href="settings/billing" Label="Billing" />
</Tabs>

Picking a tab

Use Selected for the tab that opens first, and @bind-Selected to follow it from C# on interactive pages. A tab's value is its Value, or its label in lower case with dashes (billing-history).

Preview Code

Preview

Profile Billing Security

Profile

Your name, photo and the email people see.

Billing

Your plan, payment method and invoices.

Security

Your password, passkeys and sessions.

C# has the tab as profile

Code

Modes.razor

@* The same Tabs in each mode: radios and CSS with no script, ARIA tabs with IzzyBlazor's script,
   and C# told of the change on an interactive page. *@
<Stack Gap="3" Grow>
    <Tabs @bind-Selected="_tab" Label="Account">
        <Tab Label="Profile" Icon="Lucide.User">
            <TextBlock Color="Color.Muted">Your name, photo and the email people see.</TextBlock>
        </Tab>
        <Tab Label="Billing" Icon="Lucide.CreditCard">
            <TextBlock Color="Color.Muted">Your plan, payment method and invoices.</TextBlock>
        </Tab>
        <Tab Label="Security" Icon="Lucide.Shield">
            <TextBlock Color="Color.Muted">Your password, passkeys and sessions.</TextBlock>
        </Tab>
    </Tabs>
    <TextBlock Size="TextSize.Sm" Color="Color.Muted">C# has the tab as <Code>@(_tab ?? "profile")</Code></TextBlock>
</Stack>

@code {
    private string? _tab;
}

Off: Radio buttons and CSS switch the panels; arrow keys work. C# isn't told.

Every panel is rendered with the page, and picking a tab only shows another, so it's instant and keeps what's typed. Content that's slow to build or rarely opened is better on a page of its own, behind a TabLink.

Variants, icons and badges

Use Variant for an underline (the default), soft tabs or a segmented control. Each Tab can have an Icon and a Badge, or be Disabled.

Preview Code

Code

Variants.razor

<Stack Gap="6" Grow>
    @foreach (var variant in Enum.GetValues<TabsVariant>())
    {
        <Stack Gap="2">
            <TextBlock Size="TextSize.Sm" Color="Color.Muted">@variant</TextBlock>
            <Tabs Variant="variant" Label="@($"Project ({variant})")">
                <Tab Label="Overview" Icon="Lucide.LayoutDashboard">
                    <TextBlock>Builds, traffic and errors at a glance.</TextBlock>
                </Tab>
                <Tab Label="Activity" Badge="3">
                    <TextBlock>Three new deploys since yesterday.</TextBlock>
                </Tab>
                <Tab Label="Billing" Disabled>Available on paid plans.</Tab>
                <Tab Label="Settings" Icon="Lucide.Settings">
                    <TextBlock>Domains, environment variables and members.</TextBlock>
                </Tab>
            </Tabs>
        </Stack>
    }
</Stack>

Sizes and full width

Use Size to match the buttons and fields around the tabs, and FullWidth to share the row between them.

Preview Code

Preview

Day Week Month

Day

412 visits today.

Week

2,980 visits this week.

Month

12,406 visits this month.

Day Week Month

Day

412 visits today.

Week

2,980 visits this week.

Month

12,406 visits this month.

Day Week Month

Day

412 visits today.

Week

2,980 visits this week.

Month

12,406 visits this month.

Code

Sizes.razor

<Stack Gap="5" Grow>
    <Tabs Size="ControlSize.Sm" Variant="TabsVariant.Segmented" FullWidth Label="Range (small)">
        <Tab Label="Day">412 visits today.</Tab>
        <Tab Label="Week">2,980 visits this week.</Tab>
        <Tab Label="Month">12,406 visits this month.</Tab>
    </Tabs>
    <Tabs Variant="TabsVariant.Segmented" FullWidth Label="Range">
        <Tab Label="Day">412 visits today.</Tab>
        <Tab Label="Week">2,980 visits this week.</Tab>
        <Tab Label="Month">12,406 visits this month.</Tab>
    </Tabs>
    <Tabs Size="ControlSize.Lg" Variant="TabsVariant.Segmented" FullWidth Label="Range (large)">
        <Tab Label="Day">412 visits today.</Tab>
        <Tab Label="Week">2,980 visits this week.</Tab>
        <Tab Label="Month">12,406 visits this month.</Tab>
    </Tabs>
</Stack>

Vertical

Use Orientation="Orientation.Vertical" to put the tabs in a column beside the panels from 640px up; on phones they stay a row above, which scrolls when it doesn't fit.

Preview Code

Preview

General Members4 Integrations Danger zone

General

Name, description and visibility.

Members

Four people have access to this project.

Integrations

GitHub and Slack are connected.

Danger zone

Transfer or delete the project.

Code

Vertical.razor

<Tabs Orientation="Orientation.Vertical" Label="Project settings" Grow>
    <Tab Label="General" Icon="Lucide.Settings">
        <TextBlock Weight="FontWeight.Medium">General</TextBlock>
        <TextBlock Size="TextSize.Sm" Color="Color.Muted">Name, description and visibility.</TextBlock>
    </Tab>
    <Tab Label="Members" Icon="Lucide.UsersRound" Badge="4">
        <TextBlock Weight="FontWeight.Medium">Members</TextBlock>
        <TextBlock Size="TextSize.Sm" Color="Color.Muted">Four people have access to this project.</TextBlock>
    </Tab>
    <Tab Label="Integrations" Icon="Lucide.Plug">
        <TextBlock Weight="FontWeight.Medium">Integrations</TextBlock>
        <TextBlock Size="TextSize.Sm" Color="Color.Muted">GitHub and Slack are connected.</TextBlock>
    </Tab>
    <Tab Label="Danger zone" Icon="Lucide.TriangleAlert">
        <TextBlock Weight="FontWeight.Medium">Danger zone</TextBlock>
        <TextBlock Size="TextSize.Sm" Color="Color.Muted">Transfer or delete the project.</TextBlock>
    </Tab>
</Tabs>

In the address

Use QueryKey to keep the selected tab in the query string, so a link to ?tab=billing opens Billing and a copied address keeps the tab. The address wins over Selected.

Preview Code

Preview

Profile Billing Security

Profile

Your name, photo and the email people see.

Billing

Your plan, payment method and invoices.

Security

Your password, passkeys and sessions.

Link to Billing

Code

Url.razor

@inject NavigationManager Navigation

<Stack Gap="3" Grow>
    <Tabs QueryKey="tab" Label="Account">
        <Tab Label="Profile" Icon="Lucide.User">
            <TextBlock Color="Color.Muted">Your name, photo and the email people see.</TextBlock>
        </Tab>
        <Tab Label="Billing" Icon="Lucide.CreditCard">
            <TextBlock Color="Color.Muted">Your plan, payment method and invoices.</TextBlock>
        </Tab>
        <Tab Label="Security" Icon="Lucide.ShieldCheck">
            <TextBlock Color="Color.Muted">Your password, passkeys and sessions.</TextBlock>
        </Tab>
    </Tabs>
    <Row>
        <Button Href="@Navigation.GetUriWithQueryParameter("tab", "billing")" Size="ControlSize.Sm"
                Variant="ButtonVariant.Outline" Accent="Accent.Neutral" StartIcon="Lucide.Link">Link to Billing</Button>
    </Row>
</Stack>

Off: The link opens Billing, but picking a tab doesn't change the address.

In a form

Put Tabs inside a Form to split a long form: every panel is part of it, so every field posts. When the server finds errors, as here with NativeValidation="false", the first tab with errors opens, unless the open one has some, and each tab shows how many it has.

Preview Code

Preview

Code

AccountForm.razor

@using System.ComponentModel.DataAnnotations

@* Every panel is inside the form, so every field posts. NativeValidation="false" lets the
   server check, so Save opens the first tab with errors and each tab counts its own. *@
<Form Model="Model" FormName="tabs-account-form" OnValidSubmit="Save" NativeValidation="false" MaxWidth="36.Rem">
    <Heading Level="2" Size="TextSize.Xl">Account details</Heading>
    <FormErrors />
    <Tabs Label="Account details">
        <Tab Label="Profile" Icon="Lucide.User">
            <Stack Gap="4">
                <TextField @bind-Value="Model!.Name" AutoComplete="name" />
                <TextField @bind-Value="Model!.Email" AutoComplete="email" />
            </Stack>
        </Tab>
        <Tab Label="Address" Icon="Lucide.MapPin">
            <Stack Gap="4">
                <TextField @bind-Value="Model!.Street" AutoComplete="street-address" />
                <Row Gap="3">
                    <TextField @bind-Value="Model!.City" AutoComplete="address-level2" Grow />
                    <TextField @bind-Value="Model!.PostalCode" AutoComplete="postal-code" MaxWidth="9.Rem" />
                </Row>
            </Stack>
        </Tab>
    </Tabs>
    <FormActions><Button Submit>Save</Button></FormActions>
    @if (_saved)
    {
        <Alert Status="Status.Success">Saved: @Model!.Name, @Model.City.</Alert>
    }
</Form>

@code {
    [SupplyParameterFromForm(FormName = "tabs-account-form")]
    private Account? Model { get; set; }

    private bool _saved;

    // The profile is filled in and the address isn't, so Save opens the Address tab.
    protected override void OnInitialized() => Model ??= new() { Name = "Ada Lovelace", Email = "ada@example.com" };

    private void Save() => _saved = true;

    public sealed class Account
    {
        [Required(ErrorMessage = "Enter your name")]
        public string? Name { get; set; }

        [Required(ErrorMessage = "Enter your email"), EmailAddress(ErrorMessage = "Enter an email like name@example.com")]
        public string? Email { get; set; }

        [Required(ErrorMessage = "Enter a street address")]
        public string? Street { get; set; }

        [Required(ErrorMessage = "Enter a city")]
        public string? City { get; set; }

        [Required(ErrorMessage = "Enter a postal code"), Display(Name = "Postal code")]
        public string? PostalCode { get; set; }
    }
}

Off: There are no tabs: both sections show, one under the other. Save posts, and the page loads again with the server's messages.

With the browser's own checks on (the default), the post waits until they pass, and the script opens the tab of the first field the browser stops at, so its message shows.

Panel padding

Use ContentPadding to pad every panel on all sides, and a Tab's own ContentPadding="0" to run a table edge to edge.

Preview Code

Preview

Summary History

Summary

Three deploys today, all healthy. The last one finished 12 minutes ago.

History

Deploys today
Commit	Author	Time
a1f9c3e	Ada Lovelace	14:02
7be20d4	Grace Hopper	11:47
c03e8a1	Alan Turing	09:15

Code

Padding.razor

@* ContentPadding pads every panel on all sides (the tab list keeps its place), so the text sits
   clear of the border; the History tab sets its own 0, so the table, without its own border,
   runs edge to edge. *@
<Box Border="1" Radius="Radius.Lg" Grow MaxWidth="34.Rem">
    <Tabs Label="Deploys" ContentPadding="4">
        <Tab Label="Summary" Icon="Lucide.Activity">
            <TextBlock>Three deploys today, all healthy. The last one finished 12 minutes ago.</TextBlock>
        </Tab>
        <Tab Label="History" Icon="Lucide.Clock" ContentPadding="0">
            <Table Items="Deploys" Caption="Deploys today" Bordered="false">
                <PropertyColumn Property="d => d.Commit" />
                <PropertyColumn Property="d => d.Author" />
                <PropertyColumn Property="d => d.Time" />
            </Table>
        </Tab>
    </Tabs>
</Box>

Tabs as links

Use TabLink in place of Tab for sections that are pages of their own: the tabs are a nav of plain links, and the one for the current address is marked on the server.

Preview Code

Preview

The team page: four people have access.

Code

Links.razor

@inject NavigationManager Navigation

@* Each TabLink is a link, here to this page with ?view= (in an app, usually its own route), and
   the one for the current address is marked on the server. Profile's link has no view: it's
   current until a link with one matches. *@
<Stack Gap="2" Grow>
    <Tabs Label="Settings">
        <TabLink Href="@To(null)" Label="Profile" Icon="Lucide.User" />
        <TabLink Href="@To("billing")" Label="Billing" Icon="Lucide.CreditCard" />
        <TabLink Href="@To("audit")" Label="Audit" Disabled />
        <TabLink Href="@To("team")" Label="Team" Icon="Lucide.UsersRound" Badge="4" />
    </Tabs>
    <TextBlock Color="Color.Muted">
        @(View switch
        {
            "billing" => "The billing page: your plan, payment method and invoices.",
            "team" => "The team page: four people have access.",
            _ => "The profile page: your name, photo and email.",
        })
    </TextBlock>
</Stack>

@code {
    [SupplyParameterFromQuery(Name = "view")]
    private string? View { get; set; }

    private string To(string? view) => Navigation.GetUriWithQueryParameter("view", view);
}

A tab stays current on the pages below its link, so a settings tab is current on settings/billing too; Match="NavLinkMatch.All" stops that. Tabs for one page told apart by the query, as here, mark one at a time.

Parts

Written inside Tabs. The API page lists their parameters.

Tab: one tab of a Tabs: its label goes in the tab list and its content in a panel.
TabLink: a tab that's a link to its own page, for sections split across routes (/settings/profile, /settings/billing).

Mode support

What works in each mode, Tabs
Feature	Off	Static	Live
Switch panels, keeping what's typed	Yes	Yes	Yes
Heard as tabs, with Home and End	No	Yes	Yes
Open a tab from a ?tab= link	Yes	Yes	Yes
The address follows the picked tab	No	Yes	Yes
In a form: error counts, the tab with errors opens	No	Yes	Yes
Selected bound to C#	No	No	Yes
Tabs as links (TabLink)	Yes	Yes	Yes

Off: JavaScript disabled. Static: a static SSR page with IzzyBlazor's script. Live: an interactive page (Server, WebAssembly or Auto).

Accessibility

With script, the list is ARIA tabs (tablist, tab, tabpanel, aria-selected) with only the selected tab in the tab order; with JavaScript off it's heard as a radio group.
Arrow keys select the next or previous tab, skipping disabled ones; with script, Home and End go to the first and last, and vertical tabs laid out as a column use Up and Down.
In a form with JavaScript off, there are no tabs: every panel shows in order, each after its tab's label as plain text, so every field can be filled in.
With script, each panel is named by its tab and takes focus, so Tab moves from the tab to the panel.
Label names the tab list (or the nav of TabLinks). It's optional, as in ARIA and other libraries, with no default; set it when the tabs' purpose isn't clear from the heading before them, and give each nav of TabLinks its own when a page has more than one.
In a form, with script, a tab whose fields have errors shows a count, read as part of its name ("Billing (1 error)").
TabLinks render a nav of plain links that Tab moves between (no arrow keys); the current page's link has aria-current, and a disabled one is a link with no href, announced as disabled (aria-disabled).

Parameters

Tabs parameters
Prop	Type	Default
`@bind-Selected`The selected tab's Value.	`string?`	`computed`
`Label`The tab list's (or the TabLinks' nav's) name for screen readers, such as "Account settings".	`string?`
`QueryKey`Keeps the selected tab in the URL under this query-string key, such as tab: a link to ?tab=billing opens that tab, and with JavaScript switching tabs updates the URL.	`string?`
`Variant`How the tabs look.	`TabsVariant`	`TabsVariant.Line`
`Size`Tab height and text size, shared with buttons and fields.	`ControlSize`	`ControlSize.Md`
`FullWidth`Stretches the tabs to share the full width (or, vertical, the list's width).	`bool`	`false`
`ContentPadding`Padding on every side of each panel, in spacing steps, in place of the default space above and below (the default has none at the sides).	`Responsive<int>`
`Orientation`A row above the panels (the default), or a column beside them from 640px up.	`Orientation`	`Orientation.Horizontal`
`Id`The element id; tab and panel ids build on it.	`string?`
`ChildContent`The Tabs.	`RenderFragment?`

Plus 16 item props and 4 common props.

Full API