element-plus/website/docs/zh-CN/switch.md
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## Switch 开关
表示两种相互对立的状态间的切换,多用于触发「开/关」。
### 基本用法
:::demo 绑定`v-model`到一个`Boolean`类型的变量。可以使用`active-color`属性与`inactive-color`属性来设置开关的背景色。
```html
<el-switch v-model="value" active-color="#13ce66" inactive-color="#ff4949">
</el-switch>
<script>
export default {
data() {
return {
value: true,
}
},
}
</script>
```
:::
### 文字描述
:::demo 使用`active-text`属性与`inactive-text`属性来设置开关的文字描述。
```html
<el-switch v-model="value1" active-text="按月付费" inactive-text="按年付费">
</el-switch>
<el-switch
style="display: block"
v-model="value2"
active-color="#13ce66"
inactive-color="#ff4949"
active-text="按月付费"
inactive-text="按年付费"
>
</el-switch>
<script>
export default {
data() {
return {
value1: true,
value2: true,
}
},
}
</script>
```
:::
### 扩展的 value 类型
:::demo 设置`active-value`和`inactive-value`属性,接受`Boolean`, `String`或`Number`类型的值。
```html
<el-tooltip :content="'Switch value: ' + value" placement="top">
<el-switch
v-model="value"
active-color="#13ce66"
inactive-color="#ff4949"
active-value="100"
inactive-value="0"
>
</el-switch>
</el-tooltip>
<script>
export default {
data() {
return {
value: '100',
}
},
}
</script>
```
:::
### 禁用状态
:::demo 设置`disabled`属性,接受一个`Boolean`,设置`true`即可禁用。
```html
<el-switch v-model="value1" disabled> </el-switch>
<el-switch v-model="value2" disabled> </el-switch>
<script>
export default {
data() {
return {
value1: true,
value2: false,
}
},
}
</script>
```
:::
### 加载中
:::demo 设置`loading`属性,接受一个`Boolean`,设置`true`即加载中状态。
```html
<el-switch v-model="value1" loading> </el-switch>
<el-switch v-model="value2" loading> </el-switch>
<script>
export default {
data() {
return {
value1: true,
value2: false,
}
},
}
</script>
```
:::
### 阻止切换
:::demo 设置`beforeChange`属性,若返回 false 或者返回 Promise 且被 reject则停止切换。
```html
<el-switch v-model="value1" :loading="loading1" :beforeChange="beforeChange1">
</el-switch>
<el-switch v-model="value2" :loading="loading2" :beforeChange="beforeChange2">
</el-switch>
<script>
import { reactive, toRefs } from 'vue'
import { ElMessage } from 'element-plus'
export default {
setup() {
const status1 = reactive({
value1: false,
loading1: false,
})
const beforeChange1 = () => {
status1.loading1 = true
return new Promise((resolve) => {
setTimeout(() => {
status1.loading1 = false
ElMessage.success('切换成功')
return resolve(true)
}, 1000)
})
}
const status2 = reactive({
value2: false,
loading2: false,
})
const beforeChange2 = () => {
status2.loading2 = true
return new Promise((resolve, reject) => {
setTimeout(() => {
status2.loading2 = false
ElMessage.error('切换失败')
return reject(new Error('error'))
}, 1000)
})
}
return {
...toRefs(status1),
...toRefs(status2),
beforeChange1,
beforeChange2,
}
},
}
</script>
```
:::
### Attributes
| 参数 | 说明 | 类型 | 可选值 | 默认值 |
| --------------------- | --------------------------------------------------------------------------- | ------------------------- | ------ | ------- |
| model-value / v-model | 绑定值,必须等于`active-value`或`inactive-value`,默认为`Boolean`类型 | boolean / string / number | — | — |
| disabled | 是否禁用 | boolean | — | false |
| loading | 是否显示加载中 | boolean | — | false |
| width | switch 的宽度(像素) | number | — | 40 |
| active-icon-class | switch 打开时所显示图标的类名,设置此项会忽略 `active-text` | string | — | — |
| inactive-icon-class | switch 关闭时所显示图标的类名,设置此项会忽略 `inactive-text` | string | — | — |
| active-text | switch 打开时的文字描述 | string | — | — |
| inactive-text | switch 关闭时的文字描述 | string | — | — |
| active-value | switch 打开时的值 | boolean / string / number | — | true |
| inactive-value | switch 关闭时的值 | boolean / string / number | — | false |
| active-color | switch 打开时的背景色 | string | — | #409EFF |
| inactive-color | switch 关闭时的背景色 | string | — | #C0CCDA |
| border-color | switch 边框颜色 | string | — | — |
| name | switch 对应的 name 属性 | string | — | — |
| validate-event | 改变 switch 状态时是否触发表单的校验 | boolean | — | true |
| before-change | switch 状态改变前的钩子,返回 false 或者返回 Promise 且被 reject 则停止切换 | function | — | — |
### Events
| 事件名称 | 说明 | 回调参数 |
| -------- | ------------------------------- | ---------- |
| change | switch 状态发生变化时的回调函数 | 新状态的值 |
### Methods
| 方法名 | 说明 | 参数 |
| ------ | ------------------ | ---- |
| focus | 使 Switch 获取焦点 | - |