MNotes/components-wiki/switch.md

Switch

This documentation is fully rendered on the Material Web catalog.

Switches toggle the state of an item on or off.

• Design article
• API Documentation
• Source code

Usage

Switches are similar to checkboxes, and can be unselected or selected.

<md-switch></md-switch>
<md-switch selected></md-switch>

Icons

Icons can be used to visually emphasize the switch's selected state. Switches can choose to display both icons or only selected icons.

<md-switch icons></md-switch>
<md-switch icons selected></md-switch>

<md-switch icons show-only-selected-icon></md-switch>
<md-switch icons show-only-selected-icon selected></md-switch>

Label

Associate a label with a switch using the <label> element.

<label>
  Wi-Fi
  <md-switch selected></md-switch>
</label>

<label for="switch">Bluetooth</label>
<md-switch id="switch"></md-switch>

Accessibility

Add an aria-label attribute to switches without labels or switches whose labels need to be more descriptive.

<md-switch aria-label="Lights"></md-switch>

<label>
  All
  <md-switch aria-label="All notifications"></md-switch>
</label>

Note: switches are not automatically labelled by <label> elements and always need an aria-label. See b/294081528.

Theming

Switches supports Material theming and can be customized in terms of color and shape.

Tokens

Token	Default value
--md-switch-handle-color	--md-sys-color-outline
--md-switch-handle-shape	--md-sys-shape-corner-full
--md-switch-track-color	--md-sys-color-surface-container-highest
--md-switch-track-shape	--md-sys-shape-corner-full
--md-switch-selected-handle-color	--md-sys-color-on-primary
--md-switch-selected-track-color	--md-sys-color-primary

• All tokens

Example

<style>
  :root {
    /* System tokens */
    --md-sys-color-primary: #006a6a;
    --md-sys-color-on-primary: #ffffff;
    --md-sys-color-outline: #6f7979;
    --md-sys-color-surface-container-highest: #dde4e3;

    /* Component tokens */
    --md-switch-handle-shape: 0px;
    --md-switch-track-shape: 0px;
  }
</style>

<md-switch></md-switch>
<md-switch selected></md-switch>

API

MdSwitch <md-switch>

Properties

Property	Attribute	Type	Default	Description
selected	selected	boolean	false	Puts the switch in the selected state and sets the form submission value to the value property.
icons	icons	boolean	false	Shows both the selected and deselected icons.
showOnlySelectedIcon	show-only-selected-icon	boolean	false	Shows only the selected icon, and not the deselected icon. If true, overrides the behavior of the icons property.
required	required	boolean	false	When true, require the switch to be selected when participating in form submission. https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/checkbox#validation
value	value	string	'on'	The value associated with this switch on form submission. null is submitted when selected is false.
disabled		boolean	undefined
name		string	undefined

Methods

Method	Parameters	Returns	Description
formResetCallback	None	void
formStateRestoreCallback	state	void

Events

Event	Type	Bubbles	Composed	Description
input	InputEvent	No	No	Fired whenever selected changes due to user interaction (bubbles and composed).
change	Event	No	No	Fired whenever selected changes due to user interaction (bubbles).