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docs(Stepper): add value type faq (#6868)
* docs(Stepper): add value type faq * docs: remove space
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@ -167,3 +167,15 @@ export default {
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| minus | 点击减少按钮时触发 | - |
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| focus | 输入框聚焦时触发 | _event: Event_ |
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| blur | 输入框失焦时触发 | _event: Event_ |
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## 常见问题
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### 为什么 value 有时候会变成 string 类型?
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这是因为用户输入过程中可能出现小数点或空值,比如 `1.`,这种情况下组件会抛出字符串类型。
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如果希望 value 保持 number 类型,可以在 v-model 上添加 `number` 修饰符:
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```html
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<van-stepper v-model.number="value" />
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```
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