---
category: Components
type: Layout
cols: 1
title: Layout
---

Handling the overall layout of a page.

## Specification

### Size

The first level navigation is inclined left near a logo, and the secondary menu is inclined right.

- Top Navigation (almost systems): the height of the first level navigation `64px`, the second level navigation `48px`.
- Top Navigation(contents page): the height of the first level navigation `80px`, the second level navigation `56px`.
- Calculation formula of a top navigation: `48+8n`.
- Calculation formula of an aside navigation: `200+8n`.

### Interaction rules

- The first level navigation and the last level navigation should be distincted by visualization;
- The current item should have the highest priority of visualization;
- When the current navigation item is collapsed, the stlye of the current navigation item will be applied to its parent level;
- The left side navigation bar has support for both the accordion and expanding styles, you can choose the one that fits your case best.

## Visualization rules

 Style of a navigation should conform to the its level.

- **Emphasis by colorblock**

  When background color is a deep color, you can use this pattern for the parent level navigation item of current page.

- **The highlight match stick**

  When background color is a light color, you can use this pattern for the current page navigation item, we recommed using it for the last item of the navigation path.

- **Hightlighted font**

  From the visualization aspect, hightlighted font is stronger than colorblock, this pattern is often used for the parent level of the current item.

- **Enlarge the size of the font**

  `12px`、`14px` is a standard font size of navigations，`14px` is used for the first and the second level of the navigation. You can choose a approprigate font size in terms of the level of your navigation.

## Component Overview

- `Layout`: The layout wrapper, in which `Header` `Sider` `Content` `Footer` or `Layout` itself can be nested, and can be placed in any parent container.
- `Header`: The top layout with default style, in which any element can be nested, and must be placed in `Layout`.
- `Sider`: The sidebar with default style and basic functions, in which any element can be nested, and must be placed in `Layout`.
- `Content`: The content layout with default style, in which any element can be nested, and must be placed in `Layout`.
- `Footer`: The bottom layout with default style, in which any element can be nested, and must be placed in `Layout`.

> Based on `flex layout`, please pay attention to the [compatibility](http://caniuse.com/#search=flex).

## API

```jsx
<Layout>
  <Header>header</Header>
  <Layout>
    <Sider>left sidebar</Sider>
    <Content>main content</Content>
    <Sider>right sidebar</Sider>
  </Layout>
  <Footer>footer</Footer>
</Layout>
```

### Layout

The wrapper.

| Property | Description | Type | Default |
| -------- | ----------- | ---- | ------- |
| className | container className | string | - |
| style | to customize the styles | object | - |

> APIs of `Layout.Header` `Layout.Footer` `Layout.Content` are the same as that of `Layout`.

### Layout.Sider

The sidebar.

| Property | Description | Type | Default |
| -------- | ----------- | ---- | ------- |
| breakpoint | breakpoint of the responsive layout | Enum { 'xs', 'sm', 'md', 'lg', 'xl' } | - |
| className | container className | string | - |
| collapsed | to set the current status | boolean | - |
| collapsedWidth | width of the collapsed sidebar, by setting to `0` a special trigger will appear | number | 64 |
| collapsible | whether can be collapsed | boolean | false |
| defaultCollapsed | to set the initial status | boolean | false |
| reverseArrow | reverse direction of arrow, for a sider that expands from the right | boolean | false |
| style | to customize the styles | object | - |
| trigger | specify the customized trigger, set to null to hide the trigger | string\|ReactNode | - |
| width | width of the sidebar | number\|string | 200 |
| onCollapse | the callback function, executed by clicking the trigger or activating the responsive layout | (collapsed, type) => {} | - |

#### breakpoint width

```js
{
  xs: '480px',
  sm: '768px',
  md: '992px',
  lg: '1200px',
  xl: '1600px',
}
```