---
title: "Componente Switch — zenit Zig UI"
description: "Un interruptor para ajustes que se aplican al instante. Estados off, on y disabled bien diferenciados, con semántica de teclado y accesibilidad."
url: https://zenit.z.express/es/components/switch
language: es
alternate_en: https://zenit.z.express/components/switch.md
alternate_zh: https://zenit.z.express/zh/components/switch.md
alternate_ja: https://zenit.z.express/ja/components/switch.md
alternate_ko: https://zenit.z.express/ko/components/switch.md
alternate_fr: https://zenit.z.express/fr/components/switch.md
alternate_de: https://zenit.z.express/de/components/switch.md
project: zenit v0.1.0-alpha (Zig 0.15.2, macOS)
source: https://github.com/version-next/zenit
---

# Switch

`ui.widgets.Switch`

Un interruptor para ajustes que se aplican al instante.

[Video](https://zenit.z.express/media/stories/switch.mp4?v=a8b343bbfb)

**BEHAVIOR CONTRACT**

Estados off, on y disabled bien diferenciados, con semántica de teclado y accesibilidad.

**RECORDED INTERACTION**

El harness activa el switch Off; la pista y el texto de estado cambian a la vez.

`examples/storybook/stories.zig:392`

```zig
pub fn buildSwitch(scope: *ui.Scope, cx: *ui.Cx) anyerror!*ui.Node {
    const a = cx.allocator;
    const c = try col(cx, 12);

    const status = try ui.text(cx, "toggled → (none)", .{ .font_size = 13, .color = light.color.fg_secondary });
    status.meta.ownership.meta.test_id = "story.switch.status";
    try c.appendChild(a, status);
    const story = try cx.bindState(SwitchStory, .{ .status = status });

    const off_switch = try W.Switch(.{
        .label_text = "Off",
        .initial_checked = false,
        .on_change = ui.Cx.boolHandlerFrom(SwitchStory, story, SwitchStory.onChange),
    }).mount(scope, cx);
    off_switch.meta.ownership.meta.test_id = "story.switch.off";
    try c.appendChild(a, off_switch);
    try c.appendChild(a, try W.Switch(.{ .label_text = "On", .initial_checked = true }).mount(scope, cx));
    try c.appendChild(a, try W.Switch(.{ .label_text = "Disabled", .disabled = true }).mount(scope, cx));
    return c;
}
```

[Ver el código en GitHubexamples/storybook/stories.zig:392](https://github.com/version-next/zenit/blob/HEAD/examples/storybook/stories.zig#L392)

El código literal de la story en el Storybook (zenit 5f9add5+wip 2026-09-30). `W` es `ui.widgets`; `col` / `row` / `label` son pequeños helpers de layout del Storybook.

### SwitchProps

`ui.widgets.Switch`

[src/ui/components/checkbox/mod.zig:679](https://github.com/version-next/zenit/blob/HEAD/src/ui/components/checkbox/mod.zig#L679)

```zig
fn Switch(props: SwitchProps) SwitchBuilder
```

| Campo | Tipo | Predeterminado | Descripción |
| --- | --- | --- | --- |
| `initial_checked` | `bool` | `false` | 初始开关态。\*\*只在 mount 时读取一次\*\*（语义同 CheckboxProps.initial\_checked）。 |
| `label_text` | `?[]const u8` | `null` | — |
| `disabled` | `bool` | `false` | — |
| `on_change` | `?core.HandlerRef` | `null` | — |
| `state_id` | `?u64` | `null` | — |

### \*Node

`ui.widgets.Switch`

mount devuelve `*Node` directamente: añádelo a un nodo padre.