# 步骤条

- 页面: https://jiguang132.com/zh/resources/material-ui/docs/steppers
- 资源: Material UI (https://jiguang132.com/zh/resources/material-ui.md)
- 全部指南: https://jiguang132.com/zh/resources/material-ui/docs.md

以明确的当前状态与错误状态展示顺序或非线性步骤。

本指南覆盖默认 Emotion 环境的 Material UI Core；扩展包与额外示例按清单单独标注。

## 使用场景与业务边界

流程完成与校验由宿主负责；activeStep 不是自动流程引擎。

## 原生组成与范围

`MobileStepper`, `Step`, `StepButton`, `StepConnector`, `StepContent`, `StepIcon`, `StepLabel`, `Stepper`

保持 Material UI 原生组合与类型，不替换为 JGuang／Base UI／Radix 同名 API。示例条目不是额外组件。

## 原生安装与初始化

```bash
npm install @mui/material@9.4.0 @emotion/react@11.14.0 @emotion/styled@11.14.1
```

采用原生 npm 包与 Emotion，不提供虚构的 JGuang UI Registry 地址。将示例放在原生 ThemeProvider 内，按项目选择 CssBaseline 或 ScopedCssBaseline。先检查 React、现有 Provider、锁文件与 SSR 配置；不要覆盖用户文件或忽略 peer 冲突。本批实际验收 React 19.2.8；React 18 及以下须匹配 react-is。完整初始化规则见随附的双语 setup 文档。

## 关键原生参数

仅解释本指南选出的关键参数，不是平铺的通用 API。原生继承来源、slot 结构、可空值与泛型仍按固定源码保留。

| 所属组件.属性 | 用途说明 | 声明来源 |
| --- | --- | --- |
| `Stepper.activeStep` | 从 0 开始的当前流程步骤索引。 | `Stepper` |
| `Stepper.nonLinear` | 允许非顺序 Stepper 导航，真实前置条件由宿主执行。 | `Stepper` |
| `Stepper.orientation` | 原生横向／纵向排列，布局行为取决于所属组件。 | `Stepper` |
| `Step.completed` | 宿主控制的步骤完成展示，不会自动校验。 | `Step` |
| `StepLabel.error` | 原生视觉错误状态，校验和恢复由宿主提供。 | `StepLabel` |

## 可运行原生示例

下列机器键只选择示例入口，不会作为通用 variant 属性传入每个组件。原生示例 JSX 与数据保持上游原文；JGuang 编写的验收示例明确标注。

- 顺序步骤 · `HorizontalLinearStepper` · 上游原生示例
- 非顺序步骤 · `HorizontalNonLinearStepper` · 上游原生示例
- 标签在下方 · `HorizontalLinearAlternativeLabelStepper` · 上游原生示例
- 错误步骤 · `HorizontalStepperWithError` · 上游原生示例
- 自定义横向步骤条 · `CustomizedSteppers` · 上游原生示例
- 纵向步骤条 · `VerticalLinearStepper` · 上游原生示例
- 标签在下方 · `VerticalLinearAlternativeLabelStepper` · 上游原生示例
- 文字步骤 · `TextMobileStepper` · 上游原生示例
- 圆点步骤 · `DotsMobileStepper` · 上游原生示例
- 进度步骤 · `ProgressMobileStepper` · 上游原生示例

## 真实使用示例

固定版本的未修改原生示例；复制时同时保留所需的局部辅助文件。

```tsx
import * as React from 'react';
import Box from '@mui/material/Box';
import Stepper from '@mui/material/Stepper';
import Step from '@mui/material/Step';
import StepLabel from '@mui/material/StepLabel';
import Button from '@mui/material/Button';
import Typography from '@mui/material/Typography';

const steps = ['Select campaign settings', 'Create an ad group', 'Create an ad'];

export default function HorizontalLinearStepper() {
  const [activeStep, setActiveStep] = React.useState(0);
  const [skipped, setSkipped] = React.useState(new Set<number>());

  const isStepOptional = React.useCallback((step: number) => {
    return step === 1;
  }, []);

  const isStepSkipped = (step: number) => {
    return skipped.has(step);
  };

  const handleNext = () => {
    let newSkipped = skipped;
    if (isStepSkipped(activeStep)) {
      newSkipped = new Set(newSkipped.values());
      newSkipped.delete(activeStep);
    }

    setActiveStep((prevActiveStep) => prevActiveStep + 1);
    setSkipped(newSkipped);
  };

  const handleBack = () => {
    setActiveStep((prevActiveStep) => prevActiveStep - 1);
  };

  const handleSkip = () => {
    if (!isStepOptional(activeStep)) {
      // You probably want to guard against something like this,
      // it should never occur unless someone's actively trying to break something.
      throw new Error("You can't skip a step that isn't optional.");
    }

    setActiveStep((prevActiveStep) => prevActiveStep + 1);
    setSkipped((prevSkipped) => {
      const newSkipped = new Set(prevSkipped.values());
      newSkipped.add(activeStep);
      return newSkipped;
    });
  };

  const handleReset = () => {
    setActiveStep(0);
  };

  const previousActiveStepRef = React.useRef(activeStep);
  const resetButtonRef = React.useRef<HTMLButtonElement>(null);
  const nextButtonRef = React.useRef<HTMLButtonElement>(null);

  // Manage focus when the active step changes.
  React.useEffect(() => {
    const previousActiveStep = previousActiveStepRef.current;
    previousActiveStepRef.current = activeStep;

    if (activeStep === steps.length) {
      // If the user has completed all steps and hits "Finish", focus the "Reset" button.
      resetButtonRef.current!.focus();
      return;
    }
    if (activeStep === 0 && previousActiveStep === steps.length) {
      // If the user has completed all steps and hits "Reset", focus the "Next" button.
      nextButtonRef.current!.focus();
      return;
    }
    if (isStepOptional(previousActiveStep) && !isStepOptional(activeStep)) {
      // If the user hits "Skip" and the next step is not optional, focus the "Next" button.
      nextButtonRef.current!.focus();
    }
  }, [activeStep, isStepOptional]);

  return (
    <Box sx={{ width: '100%' }}>
      <Stepper activeStep={activeStep}>
        {steps.map((label, index) => {
          const stepProps: { completed?: boolean } = {};
          const labelProps: {
            optional?: React.ReactNode;
          } = {};
          if (isStepOptional(index)) {
            labelProps.optional = (
              <Typography variant="caption">Optional</Typography>
            );
          }
          if (isStepSkipped(index)) {
            stepProps.completed = false;
          }
          return (
            <Step key={label} {...stepProps}>
              <StepLabel {...labelProps}>{label}</StepLabel>
            </Step>
          );
        })}
      </Stepper>
      {activeStep === steps.length ? (
        <React.Fragment>
          <Typography sx={{ mt: 2, mb: 1 }}>
            All steps completed - you&apos;re finished
          </Typography>
          <Box sx={{ display: 'flex', flexDirection: 'row', pt: 2 }}>
            <Box sx={{ flex: '1 1 auto' }} />
            <Button onClick={handleReset} ref={resetButtonRef}>
              Reset
            </Button>
          </Box>
        </React.Fragment>
      ) : (
        <React.Fragment>
          <Typography sx={{ mt: 2, mb: 1 }}>Step {activeStep + 1}</Typography>
          <Box sx={{ display: 'flex', flexDirection: 'row', pt: 2 }}>
            <Button
              color="inherit"
              disabled={activeStep === 0}
              onClick={handleBack}
              sx={{ mr: 1 }}
            >
              Back
            </Button>
            <Box sx={{ flex: '1 1 auto' }} />
            {isStepOptional(activeStep) && (
              <Button color="inherit" onClick={handleSkip} sx={{ mr: 1 }}>
                Skip
              </Button>
            )}
            <Button onClick={handleNext} ref={nextButtonRef}>
              {activeStep === steps.length - 1 ? 'Finish' : 'Next'}
            </Button>
          </Box>
        </React.Fragment>
      )}
    </Box>
  );
}

```

## 示例依赖边界

`react`, `@mui/material/Box`, `@mui/material/Stepper`, `@mui/material/Step`, `@mui/material/StepLabel`, `@mui/material/Button`, `@mui/material/Typography`, `@mui/material/StepButton`, `@mui/material/styles`, `@mui/material/Stack`, `@mui/icons-material/Check`, `@mui/icons-material/Settings`, `@mui/icons-material/GroupAdd`, `@mui/icons-material/VideoLabel`, `@mui/material/StepConnector`, `@mui/material/StepIcon`, `@mui/material/StepContent`, `@mui/material/Paper`, `@mui/material/MobileStepper`, `@mui/icons-material/KeyboardArrowLeft`, `@mui/icons-material/KeyboardArrowRight`

直接导入 Icons／System／Utils 的示例需要匹配 9.4.0 包。局部数据与辅助文件属于示例闭包，不是额外组件。远程图片和模拟操作不提供后端。

## 固定上游 API 元数据参考

以下表格保留上游元数据，不是重新推断的通用类型体系。条件泛型、继承属性与回调细节以以下源码声明为准。主题默认配置可能覆盖元数据默认值。

### MobileStepper

```tsx
import MobileStepper from '@mui/material/MobileStepper';
import { MobileStepper } from '@mui/material';
```

原生继承: `Paper`. 父级与 DOM 属性未被伪造为本组件新属性。

| 属性 | 必需 | 上游元数据类型／约束 | 元数据默认值 |
| --- | --- | --- | --- |
| `steps` | 是 | `integer` | — |
| `activeStep` | 否 | `integer` | `0` |
| `backButton` | 否 | `node` | — |
| `classes` | 否 | `object` | — |
| `nextButton` | 否 | `node` | — |
| `position` | 否 | `'bottom' \| 'static' \| 'top'` | `'bottom'` |
| `slotProps` | 否 | `{ dot?: func \| object, dots?: func \| object, progress?: func \| object, root?: func \| object }` | `{}` |
| `slots` | 否 | `{ dot?: elementType, dots?: elementType, progress?: elementType, root?: elementType }` | `{}` |
| `sx` | 否 | `Array<func \| object \| bool> \| func \| object` | — |
| `variant` | 否 | `'dots' \| 'progress' \| 'text'` | `'dots'` |



### Step

```tsx
import Step from '@mui/material/Step';
import { Step } from '@mui/material';
```

| 属性 | 必需 | 上游元数据类型／约束 | 元数据默认值 |
| --- | --- | --- | --- |
| `active` | 否 | `bool` | — |
| `children` | 否 | `node` | — |
| `classes` | 否 | `object` | — |
| `completed` | 否 | `bool` | — |
| `component` | 否 | `elementType` | — |
| `disabled` | 否 | `bool` | — |
| `expanded` | 否 | `bool` | `false` |
| `index` | 否 | `integer` | — |
| `last` | 否 | `bool` | — |
| `sx` | 否 | `Array<func \| object \| bool> \| func \| object` | — |



### StepButton

```tsx
import StepButton from '@mui/material/StepButton';
import { StepButton } from '@mui/material';
```

原生继承: `ButtonBase`. 父级与 DOM 属性未被伪造为本组件新属性。

| 属性 | 必需 | 上游元数据类型／约束 | 元数据默认值 |
| --- | --- | --- | --- |
| `children` | 否 | `node` | — |
| `classes` | 否 | `object` | — |
| `icon` | 否 | `node` | — |
| `optional` | 否 | `node` | — |
| `sx` | 否 | `Array<func \| object \| bool> \| func \| object` | — |



### StepConnector

```tsx
import StepConnector from '@mui/material/StepConnector';
import { StepConnector } from '@mui/material';
```

| 属性 | 必需 | 上游元数据类型／约束 | 元数据默认值 |
| --- | --- | --- | --- |
| `classes` | 否 | `object` | — |
| `sx` | 否 | `Array<func \| object \| bool> \| func \| object` | — |



### StepContent

```tsx
import StepContent from '@mui/material/StepContent';
import { StepContent } from '@mui/material';
```

| 属性 | 必需 | 上游元数据类型／约束 | 元数据默认值 |
| --- | --- | --- | --- |
| `children` | 否 | `node` | — |
| `classes` | 否 | `object` | — |
| `slotProps` | 否 | `{ transition?: func \| object }` | `{}` |
| `slots` | 否 | `{ transition?: elementType }` | `{}` |
| `sx` | 否 | `Array<func \| object \| bool> \| func \| object` | — |
| `transitionDuration` | 否 | `'auto' \| number \| { appear?: number, enter?: number, exit?: number }` | `'auto'` |



### StepIcon

```tsx
import StepIcon from '@mui/material/StepIcon';
import { StepIcon } from '@mui/material';
```

原生继承: `SvgIcon`. 父级与 DOM 属性未被伪造为本组件新属性。

| 属性 | 必需 | 上游元数据类型／约束 | 元数据默认值 |
| --- | --- | --- | --- |
| `active` | 否 | `bool` | `false` |
| `classes` | 否 | `object` | — |
| `completed` | 否 | `bool` | `false` |
| `error` | 否 | `bool` | `false` |
| `icon` | 否 | `node` | — |
| `sx` | 否 | `Array<func \| object \| bool> \| func \| object` | — |



### StepLabel

```tsx
import StepLabel from '@mui/material/StepLabel';
import { StepLabel } from '@mui/material';
```

| 属性 | 必需 | 上游元数据类型／约束 | 元数据默认值 |
| --- | --- | --- | --- |
| `children` | 否 | `node` | — |
| `classes` | 否 | `object` | — |
| `error` | 否 | `bool` | `false` |
| `icon` | 否 | `node` | — |
| `optional` | 否 | `node` | — |
| `slotProps` | 否 | `{ label?: func \| object, root?: func \| object, stepIcon?: func \| object }` | `{}` |
| `slots` | 否 | `{ label?: elementType, root?: elementType, stepIcon?: elementType }` | `{}` |
| `sx` | 否 | `Array<func \| object \| bool> \| func \| object` | — |



### Stepper

```tsx
import Stepper from '@mui/material/Stepper';
import { Stepper } from '@mui/material';
```

| 属性 | 必需 | 上游元数据类型／约束 | 元数据默认值 |
| --- | --- | --- | --- |
| `activeStep` | 否 | `integer` | `0` |
| `alternativeLabel` | 否 | `bool` | `false` |
| `children` | 否 | `node` | — |
| `classes` | 否 | `object` | — |
| `component` | 否 | `elementType` | — |
| `connector` | 否 | `element` | `<StepConnector />` |
| `nonLinear` | 否 | `bool` | `false` |
| `orientation` | 否 | `'horizontal' \| 'vertical'` | `'horizontal'` |
| `sx` | 否 | `Array<func \| object \| bool> \| func \| object` | — |


## 原生源码声明

声明与 import 从固定源码提取，不平铺联合类型或外部继承。英文注释／类型属于原始源码参考，不代表上游正文已全文翻译。共享类型仍位于原生包中。

### vendor/src/MobileStepper/MobileStepper.d.ts

```ts
import * as React from 'react';

import { SxProps } from '@mui/system';

import { Theme } from '../styles';

import { InternalStandardProps as StandardProps } from '../internal';

import { PaperProps } from '../Paper';

import { LinearProgressProps } from '../LinearProgress';

import { MobileStepperClasses } from './mobileStepperClasses';

import { CreateSlotsAndSlotProps, SlotProps } from '../utils/types';

export interface MobileStepperSlots {
  /**
   * The component that renders the root slot.
   * @default Paper
   */
  root: React.ElementType;
  /**
   * The component that renders the progress slot.
   * @default LinearProgress
   */
  progress: React.ElementType;
  /**
   * The component that renders the dots slot.
   * @default 'div'
   */
  dots: React.ElementType;
  /**
   * The component that renders the dot slot.
   * @default 'div'
   */
  dot: React.ElementType;
}

export interface MobileStepperRootSlotPropsOverrides {}

export interface MobileStepperProgressSlotPropsOverrides {}

export interface MobileStepperDotsSlotPropsOverrides {}

export interface MobileStepperDotSlotPropsOverrides {}

export type MobileStepperSlotsAndSlotProps = CreateSlotsAndSlotProps<
  MobileStepperSlots,
  {
    /**
     * Props forwarded to the root slot.
     * By default, the available props are based on the [Paper](https://mui.com/material-ui/api/paper/#props) component.
     */
    root: SlotProps<
      React.ElementType<PaperProps>,
      MobileStepperRootSlotPropsOverrides,
      MobileStepperOwnerState
    >;
    /**
     * Props forwarded to the progress slot.
     * By default, the available props are based on the [LinearProgress](https://mui.com/material-ui/api/linear-progress/#props) component.
     */
    progress: SlotProps<
      React.ElementType<LinearProgressProps>,
      MobileStepperProgressSlotPropsOverrides,
      MobileStepperOwnerState
    >;
    /**
     * Props forwarded to the dots slot.
     * By default, the available props are based on the div element.
     */
    dots: SlotProps<'div', MobileStepperDotsSlotPropsOverrides, MobileStepperOwnerState>;
    /**
     * Props forwarded to the dot slot.
     * By default, the available props are based on the div element.
     */
    dot: SlotProps<'div', MobileStepperDotSlotPropsOverrides, MobileStepperOwnerState>;
  }
>;

export interface MobileStepperProps
  extends StandardProps<PaperProps, 'children' | 'variant'>, MobileStepperSlotsAndSlotProps {
  /**
   * Set the active step (zero based index).
   * Defines which dot is highlighted when the variant is 'dots'.
   * @default 0
   */
  activeStep?: number | undefined;
  /**
   * A back button element. For instance, it can be a `Button` or an `IconButton`.
   */
  backButton: React.ReactNode;
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<MobileStepperClasses> | undefined;
  /**
   * A next button element. For instance, it can be a `Button` or an `IconButton`.
   */
  nextButton: React.ReactNode;
  /**
   * Set the positioning type.
   * @default 'bottom'
   */
  position?: 'bottom' | 'top' | 'static' | undefined;
  /**
   * The total steps.
   */
  steps: number;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
  /**
   * The variant to use.
   * @default 'dots'
   */
  variant?: 'text' | 'dots' | 'progress' | undefined;
}

export interface MobileStepperOwnerState extends Omit<MobileStepperProps, 'slots' | 'slotProps'> {}

export default function MobileStepper(props: MobileStepperProps): React.JSX.Element;
```

### vendor/src/Step/Step.d.ts

```ts
import * as React from 'react';

import { SxProps } from '@mui/system';

import { OverridableComponent, OverrideProps } from '../OverridableComponent';

import { Theme } from '../styles';

import { StepClasses } from './stepClasses';

export interface StepOwnProps {
  /**
   * Sets the step as active. Is passed to child components.
   */
  active?: boolean | undefined;
  /**
   * Should be `Step` sub-components such as `StepLabel`, `StepContent`.
   */
  children?: React.ReactNode;
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<StepClasses> | undefined;
  /**
   * Mark the step as completed. Is passed to child components.
   */
  completed?: boolean | undefined;
  /**
   * If `true`, the step is disabled, will also disable the button if
   * `StepButton` is a child of `Step`. Is passed to child components.
   */
  disabled?: boolean | undefined;
  /**
   * Expand the step.
   * @default false
   */
  expanded?: boolean | undefined;
  /**
   * The position of the step.
   * The prop defaults to the value inherited from the parent Stepper component.
   */
  index?: number | undefined;
  /**
   * If `true`, the Step is displayed as rendered last.
   * The prop defaults to the value inherited from the parent Stepper component.
   */
  last?: boolean | undefined;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
}

export interface StepTypeMap<
  AdditionalProps = {},
  RootComponent extends React.ElementType = 'div',
> {
  props: AdditionalProps & StepOwnProps;
  defaultComponent: RootComponent;
}

export type StepProps<
  RootComponent extends React.ElementType = StepTypeMap['defaultComponent'],
  AdditionalProps = { component?: React.ElementType | undefined },
> = OverrideProps<StepTypeMap<AdditionalProps, RootComponent>, RootComponent> & {
  component?: React.ElementType | undefined;
};

export type StepClasskey = keyof NonNullable<StepProps['classes']>;

declare const Step: OverridableComponent<StepTypeMap>;
```

### vendor/src/StepButton/StepButton.d.ts

```ts
import * as React from 'react';

import { SxProps } from '@mui/system';

import { ButtonBaseTypeMap, ExtendButtonBase, ExtendButtonBaseTypeMap } from '../ButtonBase';

import { OverrideProps } from '../OverridableComponent';

import { Theme } from '../styles';

import { StepButtonClasses } from './stepButtonClasses';

export interface StepButtonOwnProps {
  /**
   * Can be a `StepLabel` or a node to place inside `StepLabel` as children.
   */
  children?: React.ReactNode;
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<StepButtonClasses> | undefined;
  /**
   * The icon displayed by the step label.
   */
  icon?: React.ReactNode;
  /**
   * The optional node to display.
   */
  optional?: React.ReactNode;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
}

export type StepButtonTypeMap<
  AdditionalProps,
  RootComponent extends React.ElementType,
> = ExtendButtonBaseTypeMap<{
  props: AdditionalProps & StepButtonOwnProps;
  defaultComponent: RootComponent;

  ignoredProps: 'disabled';
}>;

declare const StepButton: ExtendButtonBase<
  StepButtonTypeMap<{}, ButtonBaseTypeMap['defaultComponent']>
>;

export type StepButtonClasskey = keyof NonNullable<StepButtonProps['classes']>;

export type StepButtonProps<
  RootComponent extends React.ElementType = ButtonBaseTypeMap['defaultComponent'],
  AdditionalProps = {},
> = OverrideProps<StepButtonTypeMap<AdditionalProps, RootComponent>, RootComponent> & {
  component?: React.ElementType | undefined;
};
```

### vendor/src/StepConnector/StepConnector.d.ts

```ts
import * as React from 'react';

import { SxProps } from '@mui/system';

import { Theme } from '../styles';

import { InternalStandardProps as StandardProps } from '../internal';

import { StepConnectorClasses } from './stepConnectorClasses';

export type StepConnectorIcon = React.ReactElement<unknown> | string | number;

export interface StepConnectorProps extends StandardProps<
  React.HTMLAttributes<HTMLDivElement>,
  'children'
> {
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<StepConnectorClasses> | undefined;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
}

export type StepConnectorClasskey = keyof NonNullable<StepConnectorProps['classes']>;

export default function StepConnector(props: StepConnectorProps): React.JSX.Element;
```

### vendor/src/StepContent/StepContent.d.ts

```ts
import * as React from 'react';

import { SxProps } from '@mui/system';

import { Theme } from '../styles';

import { InternalStandardProps as StandardProps } from '../internal';

import { CollapseProps } from '../Collapse';

import { TransitionProps } from '../transitions/types';

import { StepContentClasses } from './stepContentClasses';

import { CreateSlotsAndSlotProps, SlotComponentProps } from '../utils/types';

export interface StepContentSlots {
  /**
   * The component that renders the transition slot.
   * [Follow this guide](/material-ui/transitions/#transition-slots) to learn more about the requirements for this component.
   * @default Collapse
   */
  transition?:
    | React.JSXElementConstructor<TransitionProps & { children: React.ReactElement<unknown, any> }>
    | undefined;
}

export type StepContentSlotsAndSlotProps = CreateSlotsAndSlotProps<
  StepContentSlots,
  {
    /**
     * Props forwarded to the transition slot.
     * By default, the available props are based on the [Collapse](https://mui.com/material-ui/api/collapse/#props) component
     */
    transition: SlotComponentProps<
      React.ElementType<CollapseProps>,
      CollapseProps,
      StepContentOwnerState
    >;
  }
>;

export interface StepContentOwnerState extends StepContentProps {}

export interface StepContentProps
  extends StandardProps<React.HTMLAttributes<HTMLDivElement>>, StepContentSlotsAndSlotProps {
  /**
   * The content of the component.
   */
  children?: React.ReactNode;
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<StepContentClasses> | undefined;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
  /**
   * Adjust the duration of the content expand transition.
   * Passed as a prop to the transition component.
   *
   * Set to 'auto' to automatically calculate transition time based on height.
   * @default 'auto'
   */
  transitionDuration?: TransitionProps['timeout'] | 'auto' | undefined;
}

export type StepContentClasskey = keyof NonNullable<StepContentProps['classes']>;

export default function StepContent(props: StepContentProps): React.JSX.Element;
```

### vendor/src/StepIcon/StepIcon.d.ts

```ts
import * as React from 'react';

import { SxProps } from '@mui/system';

import { SvgIconOwnProps } from '../SvgIcon';

import { Theme } from '../styles';

import { InternalStandardProps as StandardProps } from '../internal';

import { StepIconClasses } from './stepIconClasses';

export interface StepIconProps
  // TODO v7: extend React.HTMLAttributes<SVGSVGElement> as svg is root component of StepIcon not div
  extends
    StandardProps<React.HTMLAttributes<HTMLDivElement>, 'color' | 'children'>,
    Omit<SvgIconOwnProps, 'children'> {
  /**
   * Whether this step is active.
   * @default false
   */
  active?: boolean | undefined;
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<StepIconClasses> | undefined;
  /**
   * Mark the step as completed. Is passed to child components.
   * @default false
   */
  completed?: boolean | undefined;
  /**
   * If `true`, the step is marked as failed.
   * @default false
   */
  error?: boolean | undefined;
  /**
   * The label displayed in the step icon.
   */
  icon: React.ReactNode;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
}

export type StepIconClasskey = keyof NonNullable<StepIconProps['classes']>;

export default function StepIcon(props: StepIconProps): React.JSX.Element;
```

### vendor/src/StepLabel/StepLabel.d.ts

```ts
import * as React from 'react';

import { SxProps } from '@mui/system';

import { Theme } from '../styles';

import { InternalStandardProps as StandardProps } from '../internal';

import { StepIconProps } from '../StepIcon';

import { StepLabelClasses } from './stepLabelClasses';

import { CreateSlotsAndSlotProps, SlotProps } from '../utils/types';

export interface StepLabelSlots {
  /**
   * The component that renders the root.
   * @default span
   */
  root: React.ElementType;
  /**
   * The component that renders the label.
   * @default span
   */
  label: React.ElementType;
  /**
   * The component to render in place of the [`StepIcon`](https://mui.com/material-ui/api/step-icon/).
   */
  stepIcon: React.ElementType;
}

export type StepLabelSlotsAndSlotProps = CreateSlotsAndSlotProps<
  StepLabelSlots,
  {
    /**
     * Props forwarded to the root slot.
     * By default, the available props are based on the span element.
     */
    root: SlotProps<'span', {}, StepLabelOwnerState>;
    /**
     * Props forwarded to the label slot.
     * By default, the available props are based on the span element.
     */
    label: SlotProps<'span', {}, StepLabelOwnerState>;
    /**
     * Props forwarded to the stepIcon slot.
     * By default, the available props are based on the div element.
     */
    stepIcon: SlotProps<React.ElementType<StepIconProps>, {}, StepLabelOwnerState>;
  }
>;

export interface StepLabelOwnerState extends StepLabelProps {}

export interface StepLabelProps
  extends StandardProps<React.HTMLAttributes<HTMLDivElement>>, StepLabelSlotsAndSlotProps {
  /**
   * In most cases will simply be a string containing a title for the label.
   */
  children?: React.ReactNode;
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<StepLabelClasses> | undefined;
  /**
   * If `true`, the step is marked as failed.
   * @default false
   */
  error?: boolean | undefined;
  /**
   * Override the default label of the step icon.
   */
  icon?: React.ReactNode;
  /**
   * The optional node to display.
   */
  optional?: React.ReactNode;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
}

export type StepLabelClasskey = keyof NonNullable<StepLabelProps['classes']>;

declare const StepLabel: ((props: StepLabelProps) => React.JSX.Element) & {
  muiName: string;
};
```

### vendor/src/Stepper/Stepper.d.ts

```ts
import * as React from 'react';

import { SxProps } from '@mui/system';

import { OverridableComponent, OverrideProps } from '../OverridableComponent';

import { Theme } from '../styles';

import { PaperProps } from '../Paper';

import { StepperClasses } from './stepperClasses';

export type Orientation = 'horizontal' | 'vertical';

export interface StepperOwnProps extends Pick<PaperProps, 'elevation' | 'square' | 'variant'> {
  /**
   * Set the active step (zero based index).
   * Set to -1 to disable all the steps.
   * @default 0
   */
  activeStep?: number | undefined;
  /**
   * If set to 'true' and orientation is horizontal,
   * then the step label will be positioned under the icon.
   * If set to 'true' and orientation is vertical,
   * it reverses the position of the label and content.
   * @default false
   */
  alternativeLabel?: boolean | undefined;
  /**
   * Two or more `<Step />` components.
   */
  children?: React.ReactNode;
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<StepperClasses> | undefined;
  /**
   * An element to be placed between each step.
   * @default <StepConnector />
   */
  connector?: React.ReactElement<unknown, any> | null | undefined;
  /**
   * If set the `Stepper` will not assist in controlling steps for linear flow.
   * @default false
   */
  nonLinear?: boolean | undefined;
  /**
   * The component orientation (layout flow direction).
   * @default 'horizontal'
   */
  orientation?: Orientation | undefined;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
}

export interface StepperTypeMap<
  AdditionalProps = {},
  RootComponent extends React.ElementType = 'div',
> {
  props: AdditionalProps & StepperOwnProps;
  defaultComponent: RootComponent;
}

export type StepperProps<
  RootComponent extends React.ElementType = StepperTypeMap['defaultComponent'],
  AdditionalProps = { component?: React.ElementType | undefined },
> = OverrideProps<StepperTypeMap<AdditionalProps, RootComponent>, RootComponent> & {
  component?: React.ElementType | undefined;
};

export type StepperClasskey = keyof NonNullable<StepperProps['classes']>;

declare const Stepper: OverridableComponent<StepperTypeMap>;
```

## 安装后验收

执行严格类型检查、生产构建和实际交互。检查键盘标签／焦点、原生支持的禁用／错误／只读语义、深浅色、窄屏和减少动画。按真实宿主数据检查回调，不把复制提示词当作安装完成。初始化工具还需检查服务端 HTML 与无告警水合。

## 来源与许可

https://github.com/mui/material-ui/tree/809a7717b4c050ba3f69b75300689f07c050a16e

MIT · @mui/material@9.4.0. 保留上游原始内容与许可证。上游完整原文保留于 vendor/docs，不标为全文中文化。

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