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filename: /packages/material-ui/src/FormControl/FormControl.js
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# FormControl

Provides context such as filled/focused/error/required for form inputs.
Relying on the context provides high flexibilty and ensures that the state always stay
consitent across the children of the `FormControl`.
This context is used by the following components:
 - FormLabel
 - FormHelperText
 - Input
 - InputLabel

## Props

| Name | Type | Default | Description |
|:-----|:-----|:--------|:------------|
| <span class="prop-name">children</span> | <span class="prop-type">node |  | The contents of the form control. |
| <span class="prop-name">classes</span> | <span class="prop-type">object |  | Override or extend the styles applied to the component. See [CSS API](#css-api) below for more details. |
| <span class="prop-name">component</span> | <span class="prop-type">union:&nbsp;string&nbsp;&#124;<br>&nbsp;func<br> | <span class="prop-default">'div'</span> | The component used for the root node. Either a string to use a DOM element or a component. |
| <span class="prop-name">disabled</span> | <span class="prop-type">bool | <span class="prop-default">false</span> | If `true`, the label, input and helper text should be displayed in a disabled state. |
| <span class="prop-name">error</span> | <span class="prop-type">bool | <span class="prop-default">false</span> | If `true`, the label should be displayed in an error state. |
| <span class="prop-name">fullWidth</span> | <span class="prop-type">bool | <span class="prop-default">false</span> | If `true`, the component will take up the full width of its container. |
| <span class="prop-name">margin</span> | <span class="prop-type">enum:&nbsp;'none'&nbsp;&#124;<br>&nbsp;'dense'&nbsp;&#124;<br>&nbsp;'normal'<br> | <span class="prop-default">'none'</span> | If `dense` or `normal`, will adjust vertical spacing of this and contained components. |
| <span class="prop-name">required</span> | <span class="prop-type">bool | <span class="prop-default">false</span> | If `true`, the label will indicate that the input is required. |

Any other properties supplied will be spread to the root element (native element).

## CSS API

You can override all the class names injected by Material-UI thanks to the `classes` property.
This property accepts the following keys:
- `root`
- `marginNormal`
- `marginDense`
- `fullWidth`

Have a look at [overriding with classes](/customization/overrides#overriding-with-classes) section
and the [implementation of the component](https://github.com/mui-org/material-ui/tree/master/packages/material-ui/src/FormControl/FormControl.js)
for more detail.

If using the `overrides` key of the theme as documented
[here](/customization/themes#customizing-all-instances-of-a-component-type),
you need to use the following style sheet name: `MuiFormControl`.

## Demos

- [Selection Controls](/demos/selection-controls)
- [Text Fields](/demos/text-fields)