Switch

A toggle between an on and an off state.

EXAMPLEwasm · webgpu

This demo runs the real GPUI component on WebGPU, which this browser does not expose.

Try Chrome or Edge 113+, or Safari 26+. In Firefox, enable dom.webgpu.enabled.

You can also run it natively: cargo run -p showcase switch

The demo failed to start in this browser.

You can run it natively instead: cargo run -p showcase switch

Live examples are not supported on most mobile browsers yet — open this page on a desktop or tablet to run the demo.

Recent phones with WebGPU may manage it (downloads ~18 MB):

#Anatomy

Import the component's parts and compose them under its root:

use base_gpui::switch::{
    SwitchRoot,
    SwitchThumb,
};

SwitchRoot::new()
    .child(
        SwitchThumb::new(),
    );
The anatomy is a structural overview. Parts with mutually exclusive modes may need separate instances; each part's section below documents its configuration.

#SwitchRoot

Coordinates the component's state and supplies context to its child parts.

Source

use base_gpui::switch::SwitchRoot;

SwitchRoot::new()
    .id("example-id")
    .name("name")
    .default_checked(true)
    .checked(None)
    .value(/* value: impl Into<SharedString> */)
    .form(/* form: impl Into<SharedString> */)
    .unchecked_value(/* unchecked_value: impl Into<SharedString> */)
    .disabled(true)
    .read_only(true)
    .required(true)
    .aria_label("aria label")
    .on_checked_change(|/* callback arguments */| { /* handle change */ })
    .style_with_state(|/* callback arguments */| { /* handle change */ });

#Builders

BuilderSignature & description
.newpub fn new() -> Self

Creates a SwitchRoot with its default configuration.

.childpub fn child(mut self, child: impl Into<SwitchChild>) -> Self
  • child: impl Into<SwitchChild>

Adds one typed child to this part.

.childrenpub fn children(mut self, children: impl IntoIterator<Item = impl Into<SwitchChild>>) -> Self
  • children: impl IntoIterator<Item = impl Into<SwitchChild>>

Adds multiple typed children in iteration order.

.idpub fn id(mut self, id: impl Into<ElementId>) -> Self
  • id: impl Into<ElementId>

Sets the stable GPUI element identity. Use a unique value when multiple instances can appear in the same view.

.namepub fn name(mut self, name: impl Into<SharedString>) -> Self
  • name: impl Into<SharedString>

Sets the form field name used when serializing or submitting the value.

.default_checkedpub fn default_checked(mut self, default_checked: bool) -> Self
  • default_checked: bool

Sets the initial checked for uncontrolled state.

.checkedpub fn checked(mut self, checked: Option<bool>) -> Self
  • checked: Option<bool>

Sets the checked configuration for this part.

.valuepub fn value(mut self, value: impl Into<SharedString>) -> Self
  • value: impl Into<SharedString>

Sets the current controlled value or the value represented by this part, depending on the part's role.

.formpub fn form(mut self, form: impl Into<SharedString>) -> Self
  • form: impl Into<SharedString>

Sets the form configuration for this part.

.unchecked_valuepub fn unchecked_value(mut self, unchecked_value: impl Into<SharedString>) -> Self
  • unchecked_value: impl Into<SharedString>

Sets the unchecked value configuration for this part.

.disabledpub fn disabled(mut self, disabled: bool) -> Self
  • disabled: bool

When true, prevents user interaction with this part.

.read_onlypub fn read_only(mut self, read_only: bool) -> Self
  • read_only: bool

When true, allows presentation and focus behavior without permitting value changes.

.requiredpub fn required(mut self, required: bool) -> Self
  • required: bool

Marks the control as required for validation and accessibility state.

.aria_labelpub fn aria_label(mut self, aria_label: impl Into<SharedString>) -> Self
  • aria_label: impl Into<SharedString>

Sets a literal accessible name for this part.

.on_checked_changepub fn on_checked_change(mut self, on_checked_change: impl Fn(bool, &mut SwitchCheckedChangeDetails, &mut Window, &mut App) + 'static,) -> Self
  • on_checked_change: impl Fn(bool, &mut SwitchCheckedChangeDetails, &mut Window, &mut App) + 'static

Registers a callback invoked when checked change occurs.

.style_with_statepub fn style_with_state(mut self, style: impl Fn(SwitchRootStyleState, Div) -> Div + 'static,) -> Self
  • style: impl Fn(SwitchRootStyleState, Div) -> Div + 'static,

Styles the part from its current behavioral state while preserving separation between behavior and visual design.

SwitchRoot also supports the GPUI traits implemented in its source, such as standard styling or child composition.

#SwitchThumb

Interactive or visual handle representing the current value.

Source

use base_gpui::switch::SwitchThumb;

SwitchThumb::new()
    .style_with_state(|/* callback arguments */| { /* handle change */ });

#Builders

BuilderSignature & description
.newpub fn new() -> Self

Creates a SwitchThumb with its default configuration.

.style_with_statepub fn style_with_state(mut self, style: impl Fn(SwitchThumbStyleState, Div) -> Div + 'static,) -> Self
  • style: impl Fn(SwitchThumbStyleState, Div) -> Div + 'static,

Styles the part from its current behavioral state while preserving separation between behavior and visual design.

SwitchThumb also supports the GPUI traits implemented in its source, such as standard styling or child composition.

#Accessibility

Keyboard interaction and accessibility semantics are implemented by the component, independently of visual styling. Known limitations caused by missing GPUI accessibility primitives are documented in the module source and are not silently approximated.

SwitchRoot exposes an AccessKit node with Role::Switch, aria_toggled derived from the checked style state, and an accessible name via the .aria_label(...) builder. Action::Click and Action::Focus are auto-registered by the existing .on_click(...) / .track_focus(...) wiring. SwitchThumb is decorative and has no role, so it stays out of the accessibility tree.

#Stability

Base GPUI is pre-1.0. Builder names and state types may evolve as GPUI and this port mature.