# 选择器

- 页面: https://jiguang132.com/zh/resources/mantine/docs/select
- 资源: Mantine Core (https://jiguang132.com/zh/resources/mantine.md)
- 全部指南: https://jiguang132.com/zh/resources/mantine/docs.md

Mantine Core 的独立组件，请不要替换为 JGuang UI/Base UI 的同名 API。

## 安装

```bash
npm install @mantine/core@9.7.1 @mantine/hooks@9.7.1
```

入口引入 `@mantine/core/styles.css`，并在根组件使用 `MantineProvider`；通过 `forceColorScheme` 同步深浅色主题。

## 使用与验证

在左侧选择组件，在预览中操作它的状态；使用“查看代码”检查真实源码。安装后执行类型检查和构建，再验证键盘焦点、手机布局与深浅色主题。

## 来源

https://github.com/mantinedev/mantine/tree/f0e2bc6d28b0f0b8aaefb5b859937bf77f539df7
MIT 许可证；不包括付费内容。下方提供上游英文参考内容，中文使用指南已适配；上游详细参考暂保留英文。

---


## 版本与兼容性

固定的 Mantine Core 9.7.1 要求 React 和 React DOM 满足 `^19.2.0`，并配套 `@mantine/hooks@9.7.1`。此条件来自实际 npm 包的 peerDependencies。React 18 或其他不兼容版本不能强行安装；先向项目负责人说明升级影响并确认方案，不使用 --force/--legacy-peer-deps 掩盖冲突。入口的原生 Provider 开启 `theme.respectReducedMotion`，并用 `forceColorScheme` 控制深浅色。

## 适用场景

从可搜索的列表中选择单个值。

## 本地示例使用的原生参数

以下参数由本地、经过类型检查的 JSX 示例提取，按所属组件区分。不是全部属性清单；完整签名和继承关系见下方固定源码参考。

| 组件参数 | 说明 |
| --- | --- |
| `Select.disabled` | 禁用用户输入或操作，不等同于只读。 |
| `Select.error` | 本地错误展示，本身不执行校验。 |
| `Select.readOnly` | 阻止编辑并保留只读交互。 |
| `Select.label` | 可见标签或当前组件的标签内容。 |
| `Select.data` | 本地选项或节点，保持 value 唯一并遵循原生结构。 |
| `Select.searchable` | 启用当前组件的本地搜索交互。 |

## 交互与状态检查

当前场景：默认、禁用、校验错误、只读。切换支持的禁用、错误或只读场景后检查真实行为；无此原生状态的组件不会被强行添加统一属性。验证键盘焦点和退出方式，修改值后按原生回调签名连接业务状态。

## 业务接入边界

单选值可为空。data 的值类型应与 value/onChange 一致；展示标签不是提交值。

## 宿主配置

先安装固定版本 @mantine/core 和 @mantine/hooks，在入口引入 @mantine/core/styles.css，并使用 MantineProvider。示例的 theme 和 variant 是 JGuang 编写的宿主参数，不是所有原生组件都接受的统一 API；通过 forceColorScheme 同步应用主题。源码面板中的原生实现仅供阅读，使用 npm 导出，不要单独复制内部实现。此批只覆盖 Core，不包括日期、图表和表单扩展包。上游详细说明保留英文，不宣称全文中文化。


## 可运行用法

以下代码使用资源原生 API；不是把其他设计系统的同名组件替换进来。

```tsx
import { useState } from 'react';
import * as M from '@mantine/core';
import '@mantine/core/styles.css';

const fruit = ["Apple", "Banana", "Orange"];
function ComponentPreview({ variant = 'Default' }: { variant?: string }) {
const disabled = variant === "Disabled";
const invalid = variant === "Invalid";
const readOnly = variant === "Read only";
return <M.Select disabled={disabled} error={invalid ? "Choose a fruit / 请选择水果" : undefined} readOnly={readOnly} label="Fruit" data={fruit} searchable />;
}
export default function Example({ variant = 'Default', theme = 'light' }: { variant?: string; theme?: 'light' | 'dark' }) {
return <M.MantineProvider forceColorScheme={theme} theme={{ respectReducedMotion: true }}><ComponentPreview variant={variant} /></M.MantineProvider>;
}

```


## 可用状态与示例

默认、禁用、校验错误、只读

示例遵循 Mantine 原生 API。支持多状态的输入组件可将示例中的 variant 改为 Disabled、Invalid 或 Read only；这些只是示例标签，不是新增的组件属性。改造时保留组件要求的数据、受控值、store 和复合子组件结构。



## Usage

`Select` allows capturing user input based on suggestions from a list.
Unlike [Autocomplete](/core/autocomplete/), `Select` does not allow entering custom values.



## Loading state

Set `loading` prop to display a loading indicator. By default, the loader is displayed on the right side of the input.
This is useful for async operations like API calls, searches, or validations:



## Controlled

The `Select` value must be a primitive type (string, number, or boolean).
The `onChange` function is called with a primitive value as a single argument.

```tsx
import { useState } from 'react';
import { Select } from '@mantine/core';

function Demo() {
  const [value, setValue] = useState<string | null>('');
  return <Select data={[]} value={value} onChange={setValue} />;
}
```

## onChange handler

`onChange` is called with two arguments:

- `value` - string value of the selected option
- `option` – selected option object

If you prefer the object format in state, use the second argument of the onChange handler:

```tsx
import { useState } from 'react';
import { ComboboxItem, Select } from '@mantine/core';

function Demo() {
  const [value, setValue] = useState<ComboboxItem | null>(null);
  return (
    <Select
      data={[{ value: 'react', label: 'React library' }]}
      value={value ? value.value : null}
      onChange={(_value, option) => setValue(option)}
    />
  );
}
```

## autoSelectOnBlur

Set the `autoSelectOnBlur` prop to automatically select the highlighted option when the input loses focus.
Note: This prop only has an effect when `searchable` is set to `true`. To see this feature in action: select an option with the up/down arrows, then click outside the input:



## Clearable

Set the `clearable` prop to display the clear button in the right section. The button is not displayed
when:

- The component does not have a value
- The component is disabled
- The component is read only






## Allow deselect

The `allowDeselect` prop determines whether the value should be deselected when the user clicks on the selected option.
By default, `allowDeselect` is `true`:



## Open on focus

Set the `openOnFocus` prop to open the dropdown when the input receives focus.
Note: This prop only has an effect when `searchable` is set to `true`:



## Searchable

Set the `searchable` prop to allow filtering options by user input:



## Controlled search value

You can control the search value with `searchValue` and `onSearchChange` props:

```tsx
import { useState } from 'react';
import { Select } from '@mantine/core';

function Demo() {
  const [searchValue, setSearchValue] = useState('');
  return (
    <Select
      searchable
      searchValue={searchValue}
      onSearchChange={setSearchValue}
      data={[]}
    />
  );
}
```

## Nothing found

Set the `nothingFoundMessage` prop to display a given message when no options match the search query
or there is no data available. If the `nothingFoundMessage` prop is not set, the `Select` dropdown will be hidden.



## Checked option icon

Set `checkIconPosition` prop to `left` or `right` to control position of check icon in active option.
To remove the check icon, set `withCheckIcon={false}`. To align unchecked labels with the checked one, set `withAlignedLabels` prop.



## Value type

`Select` supports primitive values (strings, numbers, booleans) as value type. `Select` automatically
infers the value type. If you want to set the value type explicitly, pass type argument:

```tsx
import { Select } from '@mantine/core';

type SelectValue = 'React' | 'Angular' | 'Svelte' | number;

function Demo() {
  return <Select<SelectValue> data={['React', 'Angular', 'Svelte', 100]} />;
}
```





## Sort options

By default, options are sorted by their position in the data array. You can change this behavior
with the `filter` function:



## Fuzzy search with fuse.js

You can implement fuzzy search using the [fuse.js](https://fusejs.io/) library to match options
even with typos or partial matches:






## renderOption

The `renderOption` callback allows you to customize option rendering. It is called with an option object and
checked state. The function must return a React node.



## Scrollable dropdown

By default, the options list is wrapped with [ScrollArea.Autosize](/core/scroll-area).
You can control the dropdown max-height with the `maxDropdownHeight` prop if you do not change the default settings.

If you want to use native scrollbars, set `withScrollArea={false}`. Note that in this case,
you will need to change the dropdown styles with [Styles API](/styles/styles-api).



## Fit dropdown to viewport height

Set `floatingHeight="viewport"` to make the dropdown grow to fill the available vertical
space in the viewport. The `flip` middleware is disabled in this mode – the dropdown
always opens in the configured direction and is constrained to the viewport edges instead
of flipping to the other side. Useful when working with large option lists:



## Group options

The `group` property accepts any React node, so you can render custom markup
(icons, badges, styled text) as a group label instead of a plain string. This
also applies to `MultiSelect`, `Autocomplete` and `TagsInput`. Note that
`NativeSelect` renders native `optgroup` elements and only supports string
group labels.



## Disabled options

When an option is disabled, it cannot be selected and is ignored in keyboard navigation.




## Inside Popover

To use `Select` inside popover, you need to set `withinPortal: false`:



## Control dropdown opened state

You can control the dropdown opened state with the `dropdownOpened` prop. Additionally,
you can use `onDropdownClose` and `onDropdownOpen` to listen to dropdown opened state changes.



## Dropdown position

By default, the dropdown is displayed below the input if there is enough space; otherwise it is displayed above the input.
You can change this behavior by setting the `position` and `middlewares` props, which are passed down to the
underlying [Popover](/core/popover) component.

Example of a dropdown that is always displayed above the input:



## Dropdown width

To change the dropdown width, set the `width` prop in `comboboxProps`. By default,
the dropdown width is equal to the input width.



## Dropdown offset

To change the dropdown offset, set the `offset` prop in `comboboxProps`:



## Prevent horizontal infinite scrolling

If you experience horizontal infinite scrolling in the dropdown, set the `shift` middleware `padding` to `0`:

```tsx
import { Select } from '@mantine/core';

function Demo() {
  return (
    <Select
      data={['React', 'Angular', 'Vue']}
      comboboxProps={{
        middlewares: {
          shift: { padding: 0 }
        }
      }}
    />
  );
}
```

## Dropdown animation

By default, dropdown animations are disabled. To enable them, you can set `transitionProps`,
which will be passed down to the underlying [Transition](/core/transition) component.



## Dropdown padding



## Dropdown shadow






## Input props




## Read only

Set `readOnly` to make the input read only. When `readOnly` is set,
`Select` will not show suggestions and will not call the `onChange` function.



## Disabled

Set `disabled` to disable the input. When `disabled` is set,
the user cannot interact with the input and `Select` will not show suggestions.



## Error state



## Success state








To set `aria-label` on the clear button, use `clearButtonProps`. Note that this is required
only when `clearable` is set.

```tsx
import { Select } from '@mantine/core';

function Demo() {
  return (
    <Select
      data={[]}
      clearable
      clearButtonProps={{
        'aria-label': 'Clear input',
      }}
    />
  );
}
```


## 源码参数参考

以下实现签名和类型从本地固定版本源码生成。保留可选属性、原生继承类型、联合分支和 never 限制；不会将其他设计系统的 API 混入。forwardRef 实现中的 ref 属于 React 引用，不是新增业务属性。此区域是原始类型参考，不是上游说明的全文翻译。


```ts
Select(_props)
```



```ts
export type SelectStylesNames = __InputStylesNames | ComboboxLikeStylesNames;

export interface SelectProps<Value extends Primitive = string>
  extends
    BoxProps,
    __BaseInputProps,
    ComboboxLikeProps<Value>,
    StylesApiProps<SelectFactory>,
    ElementProps<'input', 'onChange' | 'size' | 'value' | 'defaultValue'> {
  /** Controlled component value */
  value?: Value | null;

  /** Uncontrolled component default value */
  defaultValue?: Value | null;

  /** Called when value changes */
  onChange?: (value: Value | null, option: ComboboxItem<Value>) => void;

  /** Called when the clear button is clicked */
  onClear?: () => void;

  /** Determines whether the select should be searchable @default false */
  searchable?: boolean;

  /** Displays check icon near the selected option label @default true */
  withCheckIcon?: boolean;

  /** Aligns unchecked labels with the checked one @default false */
  withAlignedLabels?: boolean;

  /** Position of the check icon relative to the option label @default 'left' */
  checkIconPosition?: 'left' | 'right';

  /** Message displayed when no options match the search query or when there is no data */
  nothingFoundMessage?: React.ReactNode;

  /** Controlled search value */
  searchValue?: string;

  /** Default search value */
  defaultSearchValue?: string;

  /** Called when search changes */
  onSearchChange?: (value: string) => void;

  /** Allows deselecting the selected option by clicking it @default true */
  allowDeselect?: boolean;

  /** Displays clear button in the right section when component has value @default false */
  clearable?: boolean;

  /** Determines how the clear button and rightSection are rendered @default 'both' */
  clearSectionMode?: ClearSectionMode;

  /** Props passed down to the clear button */
  clearButtonProps?: InputClearButtonProps;

  /** Props passed down to the hidden input */
  hiddenInputProps?: Omit<React.ComponentProps<'input'>, 'value'>;

  /** A function to render content of the option, replaces the default content of the option */
  renderOption?: (item: ComboboxLikeRenderOptionInput<ComboboxItem<Value>>) => React.ReactNode;

  /** Props passed down to the underlying `ScrollArea` component in the dropdown */
  scrollAreaProps?: ScrollAreaProps;

  /** Controls color of the default chevron, by default depends on the color scheme */
  chevronColor?: MantineColor;

  /** Automatically selects the highlighted option when input loses focus @default false */
  autoSelectOnBlur?: boolean;

  /** Opens dropdown when input receives focus (requires searchable={true}) @default true */
  openOnFocus?: boolean;
}

export type SelectFactory = Factory<{
  props: SelectProps;
  ref: HTMLInputElement;
  stylesNames: SelectStylesNames;
  variant: InputVariant;
  signature: <Value extends Primitive = string>(props: SelectProps<Value>) => React.JSX.Element;
}>;

export type Mod = Record<string, any> | string;

export type BoxMod = Mod | Mod[] | BoxMod[];

export interface BoxProps extends MantineStyleProps {
  /** Class added to the root element, if applicable */
  className?: string | undefined;

  /** Inline style added to root component element, can subscribe to theme defined on MantineProvider */
  style?: MantineStyleProp;

  /** CSS variables defined on root component element */
  __vars?: CssVarsProp;

  /** `size` property passed down the HTML element */
  __size?: string;

  /** Breakpoint above which the component is hidden with `display: none` */
  hiddenFrom?: MantineBreakpoint;

  /** Breakpoint below which the component is hidden with `display: none` */
  visibleFrom?: MantineBreakpoint;

  /** Determines whether component should be hidden in light color scheme with `display: none` */
  lightHidden?: boolean;

  /** Determines whether component should be hidden in dark color scheme with `display: none` */
  darkHidden?: boolean;

  /** Element modifiers transformed into `data-` attributes, for example, `{ 'data-size': 'xl' }`, falsy values are removed */
  mod?: BoxMod;
}

export type ElementProps<
  ElementType extends React.ElementType,
  PropsToOmit extends string = never,
> = Omit<React.ComponentProps<ElementType>, 'style' | PropsToOmit>;

export interface CSSProperties extends React.CSSProperties {
  [key: string]: any;
}

type MantineStyle = CSSProperties | ((theme: MantineTheme) => CSSProperties);

export type MantineStyleProp = MantineStyle | MantineStyle[] | MantineStyleProp[] | undefined;

export type CssVariable = `--${string}`;

export type CssVariables<Variable extends string = CssVariable> = Partial<Record<Variable, string>>;

export type CssVars<Variable extends string = CssVariable> =
  | CssVariables<Variable>
  | ((theme: MantineTheme) => CssVariables<Variable>)
  | CssVars<Variable>[];

export type CssVarsProp<Variable extends string = CssVariable> =
  | CssVars<Variable>
  | CssVars<Variable>[];

type WrapperProps = React.ComponentProps<'div'> & DataAttributes;

export interface __BaseInputProps extends __InputWrapperProps, __InputProps {
  /** Props passed down to the root element */
  wrapperProps?: WrapperProps;
}

export type __InputStylesNames = InputStylesNames | InputWrapperStylesNames;

export type InputStylesNames = 'input' | 'wrapper' | 'section' | 'bottomSection';

export type InputVariant = 'default' | 'filled' | 'unstyled';

export interface __InputProps {
  /** Content section displayed on the left side of the input */
  leftSection?: React.ReactNode;

  /** Left section width, used to set `width` of the section and input `padding-left`, by default equals to the input height */
  leftSectionWidth?: React.CSSProperties['width'];

  /** Props passed down to the `leftSection` element */
  leftSectionProps?: React.ComponentProps<'div'>;

  /** Sets `pointer-events` styles on the `leftSection` element. Use `'all'` when section contains interactive elements (buttons, links). @default 'none' */
  leftSectionPointerEvents?: React.CSSProperties['pointerEvents'];

  /** Content section displayed on the right side of the input */
  rightSection?: React.ReactNode;

  /** Right section width, used to set `width` of the section and input `padding-right`, by default equals to the input height */
  rightSectionWidth?: React.CSSProperties['width'];

  /** Props passed down to the `rightSection` element */
  rightSectionProps?: React.ComponentProps<'div'>;

  /** Sets `pointer-events` styles on the `rightSection` element. Use `'all'` when section contains interactive elements (buttons, links). @default 'none' */
  rightSectionPointerEvents?: React.CSSProperties['pointerEvents'];

  /** Sets `required` attribute on the `input` element */
  required?: boolean;

  /** Key of `theme.radius` or any valid CSS value to set `border-radius`, numbers are converted to rem @default theme.defaultRadius */
  radius?: MantineRadius;

  /** Sets `disabled` attribute on the `input` element */
  disabled?: boolean;

  /** Controls input `height`, horizontal `padding`, and `font-size` @default 'sm' */
  size?: MantineSize | (string & {});

  /** Determines whether the input should have `cursor: pointer` style. Use when input acts as a button-like trigger (e.g., `component="button"` for Select/DatePicker). @default false */
  pointer?: boolean;

  /** Determines whether the input should have red border and red text color when the `error` prop is set @default true */
  withErrorStyles?: boolean;

  /** Determines whether the input should have green border when the `success` prop is set @default true */
  withSuccessStyles?: boolean;

  /** HTML `size` attribute for the input element (number of visible characters) */
  inputSize?: string;

  /** Section to be displayed when the input is `__clearable` and `rightSection` is not defined */
  __clearSection?: React.ReactNode;

  /** Determines whether the `__clearSection` should be displayed if it is passed to the component, has no effect if `rightSection` is defined */
  __clearable?: boolean;

  /** Determines how the clear button and rightSection are rendered @default 'both' */
  __clearSectionMode?: ClearSectionMode;

  /** Right section displayed when both `__clearSection` and `rightSection` are not defined */
  __defaultRightSection?: React.ReactNode;

  /** Displays loading indicator in the left or right section @default false */
  loading?: boolean;

  /** Position of the loading indicator @default 'right' */
  loadingPosition?: 'left' | 'right';

  /** Content section displayed at the bottom of the input, inside the border */
  __bottomSection?: React.ReactNode;

  /** Props passed down to the `__bottomSection` element */
  __bottomSectionProps?: React.ComponentProps<'div'>;
}

export type InputWrapperStylesNames =
  | 'root'
  | InputLabelStylesNames
  | InputDescriptionStylesNames
  | InputErrorStylesNames
  | InputSuccessStylesNames;

export interface __InputWrapperProps {
  /** Contents of `Input.Label` component. If not set, label is not displayed. */
  label?: React.ReactNode;

  /** Contents of `Input.Description` component. If not set, description is not displayed. */
  description?: React.ReactNode;

  /** Contents of `Input.Error` component. If not set, error is not displayed. */
  error?: React.ReactNode;

  /** Contents of `Input.Success` component. If not set, success is not displayed. */
  success?: React.ReactNode;

  /** Adds required attribute to the input and a red asterisk on the right side of label @default false */
  required?: boolean;

  /** If set, the required asterisk is displayed next to the label. Overrides `required` prop. Does not add required attribute to the input. @default false */
  withAsterisk?: boolean;

  /** Props passed down to the `Input.Label` component */
  labelProps?: InputLabelProps & DataAttributes & PlaceholderPolymorphicProps;

  /** Props passed down to the `Input.Description` component */
  descriptionProps?: InputDescriptionProps & DataAttributes & PlaceholderPolymorphicProps;

  /** Props passed down to the `Input.Error` component */
  errorProps?: InputErrorProps & DataAttributes & PlaceholderPolymorphicProps;

  /** Props passed down to the `Input.Success` component */
  successProps?: InputSuccessProps & DataAttributes & PlaceholderPolymorphicProps;

  /** Render function to wrap the input element. Useful for adding tooltips, popovers, or other wrappers around the input. @default React.Fragment */
  inputContainer?: (children: React.ReactNode) => React.ReactNode;

  /** Controls order and visibility of wrapper elements. Only elements included in this array will be rendered. @default ['label', 'description', 'input', 'error'] */
  inputWrapperOrder?: ('label' | 'input' | 'description' | 'error')[];
}
```


### 原生与外部类型

以下外部类型仍由 React 或资源自身依赖定义，没有手工展开为虚构属性。实际可用类型以安装版本的 TypeScript 检查为准。


```ts
Factory<{
  props: SelectProps;
  ref: HTMLInputElement;
  stylesNames: SelectStylesNames;
  variant: InputVariant;
  signature: <Value extends Primitive = string>(props: SelectProps<Value>) => React.JSX.Element;
}>
Primitive
MantineStyleProps
React.CSSProperties
MantineTheme
Partial<Record<Variable, string>>
Record<Variable, string>
Variable
MantineBreakpoint
Record<string, any>
React.ReactNode
InputLabelProps
DataAttributes
PlaceholderPolymorphicProps
InputDescriptionProps
InputErrorProps
InputSuccessProps
React.ComponentProps<'div'>
MantineRadius
MantineSize
ClearSectionMode
ComboboxLikeProps<Value>
Value
StylesApiProps<SelectFactory>
React.ElementType
Omit<React.ComponentProps<ElementType>, 'style' | PropsToOmit>
React.ComponentProps<ElementType>
ElementType
PropsToOmit
ComboboxItem<Value>
InputClearButtonProps
Omit<React.ComponentProps<'input'>, 'value'>
React.ComponentProps<'input'>
ComboboxLikeRenderOptionInput<ComboboxItem<Value>>
ScrollAreaProps
MantineColor
HTMLInputElement
InputLabelStylesNames
InputDescriptionStylesNames
InputErrorStylesNames
InputSuccessStylesNames
ComboboxLikeStylesNames
React.JSX.Element
```

---

JGuang 全部资源索引: https://jiguang132.com/llms.txt