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<toggle-switch src="/view-components/rails-app/toggle_switch" data-view-component="true" class="ToggleSwitch ToggleSwitch--disabled">
<span class="ToggleSwitch-statusIcon">
<svg hidden="hidden" data-target="toggle-switch.errorIcon" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-alert-fill color-fg-danger">
<path d="M6.457 1.047c.659-1.234 2.427-1.234 3.086 0l6.082 11.378A1.75 1.75 0 0 1 14.082 15H1.918a1.75 1.75 0 0 1-1.543-2.575ZM8 5a.75.75 0 0 0-.75.75v2.5a.75.75 0 0 0 1.5 0v-2.5A.75.75 0 0 0 8 5Zm1 6a1 1 0 1 0-2 0 1 1 0 0 0 2 0Z"></path>
</svg>
<svg hidden="hidden" data-target="toggle-switch.loadingSpinner" style="box-sizing: content-box; color: var(--color-icon-primary);" width="16" height="16" viewBox="0 0 16 16" fill="none" data-view-component="true" class="anim-rotate">
<circle cx="8" cy="8" r="7" stroke="currentColor" stroke-opacity="0.25" stroke-width="2" vector-effect="non-scaling-stroke" fill="none" />
<path d="M15 8a7.002 7.002 0 00-7-7" stroke="currentColor" stroke-width="2" stroke-linecap="round" vector-effect="non-scaling-stroke" />
</svg>
</span>
<span aria-hidden="true" data-view-component="true" class="ToggleSwitch-status">
<div data-view-component="true" class="ToggleSwitch-statusOn">On</div>
<div data-view-component="true" class="ToggleSwitch-statusOff">Off</div>
</span>
<button disabled="disabled" data-target="toggle-switch.switch" data-action="click:toggle-switch#toggle" aria-pressed="false" data-view-component="true" class="ToggleSwitch-track">
<div aria-hidden="true" data-view-component="true" class="ToggleSwitch-icons">
<div data-view-component="true" class="ToggleSwitch-lineIcon">
<svg width="16" height="16" viewBox="0 0 16 16" fill="currentColor" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" data-view-component="true">
<path fill-rule="evenodd" d="M8 2a.75.75 0 0 1 .75.75v11.5a.75.75 0 0 1-1.5 0V2.75A.75.75 0 0 1 8 2Z" />
</svg></div>
<div data-view-component="true" class="ToggleSwitch-circleIcon">
<svg width="16" height="16" viewBox="0 0 16 16" fill="currentColor" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" data-view-component="true">
<path fill-rule="evenodd" d="M8 12.5a4.5 4.5 0 1 0 0-9 4.5 4.5 0 0 0 0 9ZM8 14A6 6 0 1 0 8 2a6 6 0 0 0 0 12Z" />
</svg></div>
</div>
<div data-view-component="true" class="ToggleSwitch-knob"></div>
</button></toggle-switch>
1
render(Primer::Alpha::ToggleSwitch.new(src: UrlHelpers.toggle_switch_index_path, enabled: false))

app/components/primer/alpha/toggle_switch.css

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/* ToggleSwitch */
/* Catalyst in dotcom applies a display: block to all web component elements. This
** rule overrides it so the status label and toggle switch are laid out correctly. */
.ToggleSwitch.ToggleSwitch {
display: inline-flex;
}
.ToggleSwitch {
align-items: center;
display: inline-flex;
gap: var(--controlStack-medium-gap-condensed,0.5rem);
}
.ToggleSwitch--checked .ToggleSwitch-statusOn {
height: auto;
visibility: visible;
}
.ToggleSwitch--checked .ToggleSwitch-statusOff {
height: 0;
visibility: hidden;
}
.ToggleSwitch-track {
position: relative;
display: block;
width: var(--base-size-64,4rem);
height: var(--control-medium-size,2rem);
padding: 0;
overflow: hidden;
-webkit-text-decoration: none;
text-decoration: none;
cursor: pointer;
-webkit-user-select: none;
user-select: none;
background-color: var(--controlTrack-bgColor-rest,var(--color-switch-track-bg));
border: var(--borderWidth-thin,max(1px, 0.0625rem)) solid var(--controlTrack-borderColor-rest,var(--color-switch-track-border));
border-radius: var(--borderRadius-medium,0.375rem);
transition-timing-function: cubic-bezier(0.5, 1, 0.89, 1);
transition-duration: 80ms;
transition-property: background-color, border-color;
-webkit-appearance: none;
appearance: none;
}
.ToggleSwitch-track:focus,
.ToggleSwitch-track:focus-visible {
outline-offset: 1px;
}
.ToggleSwitch-track:hover {
background-color: var(--controlTrack-bgColor-hover,var(--color-switch-track-hover-bg));
}
.ToggleSwitch-track:active {
background-color: var(--controlTrack-bgColor-active,var(--color-switch-track-active-bg));
}
@media (pointer: coarse) {
.ToggleSwitch-track::before {
position: absolute;
top: 50%;
left: 50%;
width: 100%;
height: 100%;
min-height: 44px;
content: "";
transform: translateX(-50%) translateY(-50%);
}
}
@media (prefers-reduced-motion) {
.ToggleSwitch-track {
transition: none;
}
.ToggleSwitch-track * {
transition: none;
}
}
.ToggleSwitch-track[aria-pressed='true'][disabled] {
background-color: var(--controlTrack-bgColor-disabled,var(--color-switch-track-disabled-bg));
color: var(--control-checked-fgColor-disabled,var(--color-switch-track-checked-disabled-fg));
border-color: transparent;
}
.ToggleSwitch-track[aria-pressed='true'] {
background-color: var(--control-checked-bgColor-rest,var(--color-switch-track-checked-bg));
border-color: var(--borderColor-transparent,transparent);
}
.ToggleSwitch-track[aria-pressed='true']:not([disabled]):hover {
background-color: var(--control-checked-bgColor-hover,var(--color-switch-track-checked-hover-bg));
}
.ToggleSwitch-track[aria-pressed='true']:not([disabled]):active {
background-color: var(--control-checked-bgColor-active,var(--color-switch-track-checked-active-bg));
}
.ToggleSwitch-track[aria-pressed='true'] .ToggleSwitch-knob {
background-color: var(--controlKnob-bgColor-checked,var(--color-switch-knob-checked-bg));
border-color: var(--controlKnob-borderColor-checked,var(--color-switch-knob-checked-border));
transform: translateX(100%);
}
.ToggleSwitch-track[aria-pressed='true'] .ToggleSwitch-lineIcon {
transform: translateX(0%);
}
.ToggleSwitch-track[aria-pressed='true'] .ToggleSwitch-circleIcon {
transform: translateX(100%);
}
.ToggleSwitch-track[disabled] {
cursor: not-allowed;
background-color: var(--controlTrack-bgColor-disabled,var(--color-switch-track-disabled-bg));
border-color: transparent;
transition-property: none;
}
.ToggleSwitch-track[disabled] .ToggleSwitch-knob {
border-color: var(--borderColor-default,var(--color-border-default));
box-shadow: none;
}
.ToggleSwitch-track[disabled] .ToggleSwitch-lineIcon {
color: var(--controlTrack-fgColor-disabled,var(--color-switch-track-disabled-fg));
}
.ToggleSwitch-track[disabled] .ToggleSwitch-circleIcon {
color: var(--controlTrack-fgColor-disabled,var(--color-switch-track-disabled-fg));
}
.ToggleSwitch-icons {
display: flex;
align-items: center;
width: 100%;
height: 100%;
overflow: hidden;
}
.ToggleSwitch-lineIcon {
line-height: 0;
color: var(--control-checked-fgColor-rest,var(--color-switch-track-checked-fg));
transition-duration: 80ms;
transition-property: transform;
transform: translateX(-100%);
flex: 1 0 50%;
}
.ToggleSwitch-circleIcon {
line-height: 0;
color: var(--controlTrack-fgColor-rest,var(--color-switch-track-fg));
transition-duration: 80ms;
transition-property: transform;
transform: translateX(0);
flex: 1 0 50%;
}
.ToggleSwitch-knob {
position: absolute;
top: 0;
bottom: 0;
z-index: 1;
width: 50%;
background-color: var(--controlKnob-bgColor-rest,var(--color-switch-knob-bg));
border: var(--borderWidth-thin,max(1px, 0.0625rem)) solid var(--controlKnob-borderColor-rest,var(--color-switch-knob-border));
border-radius: var(--borderRadius-medium,0.375rem);
box-shadow: var(--shadow-resting-medium,var(--color-shadow-medium)), var(--button-default-shadow-inset,var(--color-btn-inset-shadow));
transition-timing-function: cubic-bezier(0.5, 1, 0.89, 1);
transition-duration: 80ms;
transition-property: transform;
}
@media (prefers-reduced-motion) {
.ToggleSwitch-knob {
transition: none;
}
}
.ToggleSwitch-status {
position: relative;
font-size: var(--text-body-size-medium,0.875rem);
line-height: 1.5;
color: var(--fgColor-default,var(--color-fg-default));
text-align: right;
}
.ToggleSwitch-statusIcon {
width: var(--base-size-16,1rem);
display: flex;
margin-top: 0.063rem;
}
.ToggleSwitch--small .ToggleSwitch-status {
font-size: var(--text-body-size-small,0.75rem);
}
.ToggleSwitch--small .ToggleSwitch-track {
width: var(--base-size-48,3rem);
height: var(--control-xsmall-size,1.5rem);
}
.ToggleSwitch--disabled .ToggleSwitch-status {
color: var(--fgColor-muted,var(--color-fg-muted));
}
.ToggleSwitch-statusOn {
height: 0;
visibility: hidden;
}
.ToggleSwitch-statusOff {
height: auto;
visibility: visible;
}
.ToggleSwitch--statusAtEnd {
flex-direction: row-reverse;
}
.ToggleSwitch--statusAtEnd .ToggleSwitch-status {
text-align: left;
}

app/components/primer/alpha/toggle_switch.ts

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import {controller, target} from '@github/catalyst'
@controller
class ToggleSwitchElement extends HTMLElement {
@target switch: HTMLElement
@target loadingSpinner: HTMLElement
@target errorIcon: HTMLElement
private toggling = false
get src(): string | null {
const src = this.getAttribute('src')
if (!src) return null
const link = this.ownerDocument.createElement('a')
link.href = src
return link.href
}
get csrf(): string | null {
const csrfElement = this.querySelector('[data-csrf]')
return this.getAttribute('csrf') || (csrfElement instanceof HTMLInputElement && csrfElement.value) || null
}
get csrfField(): string {
// the authenticity token is passed into the element and is not generated in js land
return this.getAttribute('csrf-field') || 'authenticity_token'
}
isRemote(): boolean {
return this.src != null
}
async toggle() {
if (this.toggling) return
this.toggling = true
if (this.isDisabled()) {
return
}
if (!this.isRemote()) {
this.performToggle()
this.toggling = false
return
}
// toggle immediately to tell screen readers the switch was clicked
this.performToggle()
this.setLoadingState()
try {
await this.submitForm()
} catch (error) {
if (error instanceof Error) {
// because we toggle immediately when the switch is clicked, toggle back to the
// old state on failure
this.setErrorState(error.message || 'An error occurred, please try again.')
this.performToggle()
}
return
} finally {
this.toggling = false
}
this.setSuccessState()
}
turnOn(): void {
if (this.isDisabled()) {
return
}
this.switch.setAttribute('aria-pressed', 'true')
this.classList.add('ToggleSwitch--checked')
}
turnOff(): void {
if (this.isDisabled()) {
return
}
this.switch.setAttribute('aria-pressed', 'false')
this.classList.remove('ToggleSwitch--checked')
}
isOn(): boolean {
return this.switch.getAttribute('aria-pressed') === 'true'
}
isOff(): boolean {
return !this.isOn()
}
isDisabled(): boolean {
return this.switch.getAttribute('disabled') != null
}
disable(): void {
this.switch.setAttribute('disabled', 'disabled')
}
enable(): void {
this.switch.removeAttribute('disabled')
}
private performToggle(): void {
if (this.isOn()) {
this.turnOff()
} else {
this.turnOn()
}
}
private setLoadingState(): void {
this.errorIcon.setAttribute('hidden', 'hidden')
this.loadingSpinner.removeAttribute('hidden')
const event = new CustomEvent('toggleSwitchLoading', {bubbles: true})
this.dispatchEvent(event)
}
private setSuccessState(): void {
const event = new CustomEvent('toggleSwitchSuccess', {bubbles: true})
this.dispatchEvent(event)
this.setFinishedState(false)
}
private setErrorState(message: string): void {
const event = new CustomEvent('toggleSwitchError', {bubbles: true, detail: message})
this.dispatchEvent(event)
this.setFinishedState(true)
}
private setFinishedState(error: boolean): void {
if (error) {
this.errorIcon.removeAttribute('hidden')
}
this.loadingSpinner.setAttribute('hidden', 'hidden')
}
private async submitForm() {
const body = new FormData()
if (this.csrf) {
body.append(this.csrfField, this.csrf)
}
body.append('value', this.isOn() ? '1' : '0')
if (!this.src) throw new Error('invalid src')
let response
try {
response = await fetch(this.src, {
credentials: 'same-origin',
method: 'POST',
headers: {
'Requested-With': 'XMLHttpRequest',
},
body,
})
} catch (error) {
throw new Error('A network error occurred, please try again.')
}
if (!response.ok) {
throw new Error(await response.text())
}
}
}
declare global {
interface Window {
ToggleSwitchElement: typeof ToggleSwitchElement
}
}
if (!window.customElements.get('toggle-switch')) {
window.ToggleSwitchElement = ToggleSwitchElement
window.customElements.define('toggle-switch', ToggleSwitchElement)
}