开关 · Switch
开关用于表单输入场景。下面的官方示例展示原生用法与状态,属性名保持上游 API。
安装与前置条件
npm install @astryxdesign/core@0.7.1 @astryxdesign/theme-neutral@0.7.1 @stylexjs/stylex@0.19.0
需要 React 19+,按顺序导入基础 CSS 和主题,并设置 Theme Provider。参见开始使用。
示例与使用方式
- 开关 · 综合展示 1:首先体验这个示例,再查看代码理解组件的组合方式。
- 开关 · 禁用状态 2:可交互查看这一用法的行为,复制代码时保留它实际使用的属性与导入。
- 开关 · 交互示例 3:可交互查看这一用法的行为,复制代码时保留它实际使用的属性与导入。
- 开关 · 交互示例 4:可交互查看这一用法的行为,复制代码时保留它实际使用的属性与导入。
- 开关 · 状态 5:可交互查看这一用法的行为,复制代码时保留它实际使用的属性与导入。
API 与上游详细参考
优先使用 0.7.1 官方中文说明;上游尚未提供中文的条目保留英文。属性名、类型及默认值保持原生 API,不把示例状态名称当成组件属性。
Switch
A toggle control for on/off states that take effect immediately. Supports labels, descriptions, loading states, and validation. Use it for settings or preferences that apply instantly. For changes requiring a form submission, use a checkbox instead.
| 属性 | 类型 | 默认值 | 说明 |
|---|---|---|---|
| ref | React.Ref<HTMLInputElement> | 转发至底层 <input> 元素的 ref。 | |
| label * | string | 开关的标签文本(始终渲染以确保无障碍性)。 | |
| value * | boolean | 开关是开启还是关闭。 | |
| onChange | (checked: boolean, e: ChangeEvent<HTMLInputElement>) => void | 开关状态变化时触发的回调。 | |
| changeAction | (checked: boolean, e: ChangeEvent<HTMLInputElement>) => void | Promise<void> | 在 onChange 之后触发的异步操作。触发乐观 UI 并显示加载旋转器直到 Promise 完成。 | |
| isLoading | boolean | false | 开关是否处于加载状态,在滑块内显示旋转器。 |
| isLabelHidden | boolean | false | 视觉上隐藏标签,同时保持屏幕阅读器的无障碍性。 |
| description | string | 显示在标签下方的描述文本。 | |
| isDisabled | boolean | false | 开关是否被禁用。 |
| size | 'sm' | 'md' | 'md' | Size variant controlling track and thumb dimensions. sm (32x20px) matches sm checkbox/radio vertical rhythm; md (40x24px, default) matches md checkbox/radio vertical rhythm. |
| htmlName | string | 底层复选框输入的 HTML name 属性,用于表单提交(开启时提交 "on")。 | |
| disabledMessage | string | Explains why the switch is disabled. With isDisabled, shows a tooltip on hover/keyboard focus and keeps the switch focusable via aria-disabled (toggling stays blocked). Use this instead of wrapping a disabled Switch in Tooltip. Disabled controls swallow the hover events an external Tooltip needs. | |
| isOptional | boolean | false | 字段是否为可选。与 isRequired 互斥。 |
| isRequired | boolean | false | 开关是否为必填。与 isOptional 互斥。 |
| status | {type: 'warning' | 'error' | 'success', message?: string} | 带类型和消息的状态指示器。在开关下方显示彩色消息框,当类型为 "error" 时设置 aria-invalid。 | |
| onFocus | (e: FocusEvent<HTMLInputElement>) => void | 开关获得焦点时触发的回调。 | |
| onBlur | (e: FocusEvent<HTMLInputElement>) => void | 开关失去焦点时触发的回调。 | |
| labelIcon | IconType | 显示在标签文本前面的图标。 | |
| labelTooltip | string | 在标签末尾的信息图标中显示的工具提示文本。 | |
| labelPosition | 'start' | 'end' | 'end' | 标签出现在开关的哪一侧。"start" 将标签放在开关前面。 |
| labelSpacing | 'hug' | 'spread' | 'hug' | 标签和开关之间的间距行为。"hug" 将它们并排放置;"spread" 将它们推到容器的两端(全宽)。"default" 是 "hug" 的已弃用别名。 |
| width | SizeValue | Width of the field (number = pixels, string used as-is, e.g. "100%"). Sizes the whole field (label, control, and status) so they stay aligned. |
使用建议
- Use for settings that apply immediately; the toggle should take effect without a separate save action.
- Pair with a clear, concise label that describes the setting being controlled.
- 避免:Use for options that require a form submission to take effect; use a checkbox instead.
- 避免:Use a switch for multi-state values; it's strictly on/off.
- 避免:Wrap a disabled switch in Tooltip to explain why it is disabled; disabled controls swallow the hover events the wrapper needs. Use the disabledMessage prop instead.
主题 API
{
"targets": [
{
"className": "astryx-switch",
"visualProps": [
"size"
],
"states": [
"checked",
"disabled"
]
},
{
"className": "astryx-switch-thumb",
"visualProps": [
"size"
],
"states": [
"checked"
]
},
{
"className": "astryx-switch-field",
"visualProps": [
"labelPosition",
"labelSpacing"
]
},
{
"className": "astryx-switch-label"
}
]
}
无障碍
- Track and thumb: The on and off tracks must each have at least 3:1 contrast with the surface behind them, and the thumb with its track. For Hover and Pointer down, measure the final colors after the tint and the pressed overlay are applied. — 3:1
组件结构
- Field: Container arranging the switch, label, and feedback.
- Track: Pill-shaped surface that shows the off or on state.
- Thumb: Indicator that moves across the track when state changes.
- Label: Text identifying the setting controlled by the switch.
- Description: Helper text below the label.
- Spinner: Loading indicator shown inside the thumb while busy.
- Status message: Error, warning, or success message below the switch.