# Container

- Page: https://jiguang132.com/resources/material-ui/docs/container
- Resource: Material UI (https://jiguang132.com/resources/material-ui.md)
- All guides: https://jiguang132.com/resources/material-ui/docs.md

Constrain content width with native breakpoints and optional gutters.

This guide covers Material UI Core with the default Emotion engine; extensions and additional demos are explicitly classified.

## Use case and business boundary

Default Emotion Container and PigmentContainer are different engine integrations; do not silently swap them.

## Native composition and scope

`Container`

Preserve native Material UI composition and types; do not substitute JGuang UI/Base UI/Radix APIs. Example entries are not extra components.

Excluded integrations: `PigmentContainer` (@mui/material-pigment-css). Not claimed verified in the default Emotion environment.

## Native installation and initialization

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

Use native npm and Emotion, not an invented JGuang UI Registry URL. Place examples inside native ThemeProvider; choose CssBaseline or ScopedCssBaseline for the project. Inspect React, existing providers, lockfile and SSR first. Never overwrite files or conceal peer conflicts. This batch verified React 19.2.8; React 18 and below require matching react-is. See the included bilingual setup guide.

## Practical native parameters

These selected parameters are not a flattened universal API. Preserve the native declaring owner, slot structure, nullable values and generics.

| Owner.prop | Practical role | Declaration source |
| --- | --- | --- |
| `Container.maxWidth` | Native Container/Dialog breakpoint width; false removes the native limit. | `Container` |
| `Container.fixed` | Constrain Container width to native breakpoint-based sizes. | `Container` |
| `Container.disableGutters` | Remove the owning component's native side gutters. | `Container` |

## Runnable native examples

Machine keys select example entries, not universal variant props. Native demo JSX/data stay unchanged; JGuang-authored acceptance fixtures are explicitly labelled.

- Fluid · `SimpleContainer` · upstream native demo
- Fixed · `FixedContainer` · upstream native demo

## Actual usage example

Unmodified pinned native demo; copy its required local helper files together.

```tsx
import * as React from 'react';
import CssBaseline from '@mui/material/CssBaseline';
import Box from '@mui/material/Box';
import Container from '@mui/material/Container';

export default function SimpleContainer() {
  return (
    <React.Fragment>
      <CssBaseline />
      <Container maxWidth="sm">
        <Box sx={{ bgcolor: '#cfe8fc', height: '100vh' }} />
      </Container>
    </React.Fragment>
  );
}

```

## Example dependency boundaries

`react`, `@mui/material/CssBaseline`, `@mui/material/Box`, `@mui/material/Container`

Direct Icons/System/Utils example imports require their matching 9.4.0 packages. Relative data/helpers are part of the example closure, not extra components. Remote images and simulated operations do not supply a backend.

## Pinned upstream API metadata reference

These tables retain the upstream metadata, not a newly inferred generic type system. Conditional generics, inherited props and callback details are defined by the source declarations below. Theme defaults may override metadata defaults.

### Container

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

| Prop | Required | Upstream metadata type / constraint | Metadata default |
| --- | --- | --- | --- |
| `classes` | no | `object` | — |
| `component` | no | `elementType` | — |
| `disableGutters` | no | `bool` | `false` |
| `fixed` | no | `bool` | `false` |
| `maxWidth` | no | `'xs' \| 'sm' \| 'md' \| 'lg' \| 'xl' \| false \| string` | `'lg'` |
| `sx` | no | `Array<func \| object \| bool> \| func \| object` | — |


## Native source declarations

Declarations/imports are extracted from pinned source without flattening unions or external inheritance. Original English comments/types are source reference, not a claim of translated upstream prose. Shared types stay in their native packages.

### vendor/src/Container/Container.d.ts

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

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

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

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

import { ContainerClasses } from './containerClasses';

export interface ContainerOwnProps {
  children?: React.ReactNode;
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<ContainerClasses> | undefined;
  /**
   * If `true`, the left and right padding is removed.
   * @default false
   */
  disableGutters?: boolean | undefined;
  /**
   * Set the max-width to match the min-width of the current breakpoint.
   * This is useful if you'd prefer to design for a fixed set of sizes
   * instead of trying to accommodate a fully fluid viewport.
   * It's fluid by default.
   * @default false
   */
  fixed?: boolean | undefined;
  /**
   * Determine the max-width of the container.
   * The container width grows with the size of the screen.
   * Set to `false` to disable `maxWidth`.
   * @default 'lg'
   */
  maxWidth?: Breakpoint | false | undefined;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
}

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

declare const Container: OverridableComponent<ContainerTypeMap>;

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

## Post-install acceptance

Run strict types, production build and real interactions. Check keyboard labels/focus, disabled/error/read-only semantics where natively supported, both themes, narrow screens and reduced motion. Verify callbacks against the real host data; do not declare installation complete from copying a prompt. Initialization fixtures also require server HTML and warning-free hydration.

## Source and license

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

MIT · @mui/material@9.4.0. Vendor originals and license are preserved. Full original upstream prose remains in vendor/docs and is not represented as fully translated.

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