## List
An ordered list of items.
[](https://storybook.grommet.io/?selectedKind=List&full=0&addons=0&stories=1&panelRight=0) [](https://codesandbox.io/s/github/grommet/grommet-sandbox?initialpath=list&module=%2Fsrc%2FList.js)
## Usage
```javascript
import { List } from 'grommet';
```
## Properties
**a11yTitle**
Custom label to be used by screen readers. When provided, an aria-label will
be added to the element.
```
string
```
**alignSelf**
How to align along the cross axis when contained in
a Box or along the column axis when contained in a Grid.
```
start
center
end
stretch
```
**gridArea**
The name of the area to place
this inside a parent Grid.
```
string
```
**margin**
The amount of margin around the component. An object can
be specified to distinguish horizontal margin, vertical margin, and
margin on a particular side.
```
none
xxsmall
xsmall
small
medium
large
xlarge
{
bottom:
xxsmall
xsmall
small
medium
large
xlarge
string,
end:
xxsmall
xsmall
small
medium
large
xlarge
string,
horizontal:
xxsmall
xsmall
small
medium
large
xlarge
string,
left:
xxsmall
xsmall
small
medium
large
xlarge
string,
right:
xxsmall
xsmall
small
medium
large
xlarge
string,
start:
xxsmall
xsmall
small
medium
large
xlarge
string,
top:
xxsmall
xsmall
small
medium
large
xlarge
string,
vertical:
xxsmall
xsmall
small
medium
large
xlarge
string
}
string
```
**as**
The DOM tag or react component to use for the element. Defaults to `ul`.
```
string
```
**background**
Item background. An array value indicates that items should have
different backgrounds, modulo the array index.
```
string
[string]
```
**border**
Item border.
```
boolean
horizontal
vertical
top
bottom
left
right
start
end
{
color:
string
{
dark: string,
light: string
},
side:
horizontal
vertical
top
bottom
left
right
start
end,
size:
xxsmall
xsmall
small
medium
large
xlarge
string
}
```
**data**
Array of data objects.
```
[
string
{
}
]
```
**children**
Function that will be called when each data item is rendered.
It will be passed three arguments, the individual data item, its index,
and an object indicating the state of the item, if any. It
should return a react element.
For example:
`children={(item, index, { active }) => {...}}`
```
function
```
**itemProps**
Item specific background, border, and pad, keyed by data index.
For example:
{ 27: { background: ..., border: ..., pad: ... }},
where the background, border, and pad accept the same values as
the same named properties on List.
```
{
}
```
**onMore**
Use this to indicate that 'data' doesn't contain all that it could.
It will be called when all of the data items have been rendered.
This might be used when the total number of items that could be retrieved
is more than you'd want to load into the browser. 'onMore' allows you
to lazily fetch more from the server only when needed.
```
function
```
**onClickItem**
When supplied, this function will be called with an event object that
include a 'item' property containing the data value associated with
the clicked item and an 'index' property containing the index in 'data'
of the clicked item. You should not include interactive elements, like
Anchor or Button inside 'primaryKey' or 'secondaryKey' as that can
cause confusion with overlapping interactive elements.
```
function
```
**pad**
Item padding.
```
xxsmall
xsmall
small
medium
large
xlarge
string
{
horizontal:
xxsmall
xsmall
small
medium
large
xlarge,
vertical:
xxsmall
xsmall
small
medium
large
xlarge,
top:
xxsmall
xsmall
small
medium
large
xlarge,
bottom:
xxsmall
xsmall
small
medium
large
xlarge,
left:
xxsmall
xsmall
small
medium
large
xlarge,
right:
xxsmall
xsmall
small
medium
large
xlarge,
start:
xxsmall
xsmall
small
medium
large
xlarge,
end:
xxsmall
xsmall
small
medium
large
xlarge
}
```
**primaryKey**
When a string is supplied, it indicates the property in a data item
object to use to get the primary content. If a function is supplied, it
will be called with the current data item object and should return
a React element that will be rendered as the primary content.
```
string
function
```
**secondaryKey**
When a string is supplied, it indicates the property in a data item
object to use to get the secondary content. If a function is supplied, it
will be called with the current data item object and should return
a React element that will be rendered as the secondary content.
```
string
function
```
**step**
How many items to render at a time. Defaults to `50`.
```
number
```
## Intrinsic element
```
ol
```
## Theme
**global.hover.background**
The background style when hovering over an interactive item. Expects `string | { color: string, opacity: string }`.
Defaults to
```
{ color: 'active', opacity: 'medium' }
```
**global.hover.color**
The text color when hovering over an interactive item. Expects `string | { dark: string, light: string }`.
Defaults to
```
{ dark: 'white', light: 'black' }
```
**list.extend**
Any additional style for the list. Expects `string | (props) => {}`.
Defaults to
```
undefined
```
**list.item.background**
Background color for list items. Expects `string | [string]`.
Defaults to
```
undefined
```
**list.item.border**
Border for list items. Expects `boolean | string | object`.
Defaults to
```
horizontal
```
**list.item.pad**
Border for list items. Expects `boolean | string | object`.
Defaults to
```
{ horizontal: 'medium', vertical: 'small' }
```
**list.item.extend**
Any additional style for the list items. Expects `string | (props) => {}`.
Defaults to
```
undefined
```