# # Custom Displays

> Displays are small inline components that allow you to create new ways of viewing field values throughout the App. Learn more about Displays.

## # Extension Entrypoint

The entrypoint of your display is the `index` file inside the `src/` folder of your extension package. It exports a configuration object with options to configure the behavior of your display. When loading your display, this object is imported by the Directus host.

Example of an entrypoint:

    import DisplayComponent from './display.vue';

    export default {
    	id: 'custom',
    	name: 'Custom',
    	icon: 'box',
    	description: 'This is my custom display!',
    	component: DisplayComponent,
    	options: null,
    	types: ['string'],
    };

#### # Available Options

- `id` — The unique key for this display. It is good practice to scope proprietary displays with an author prefix.
- `name` — The human-readable name for this display.
- `icon` — An icon name from the material icon set, or the extended list of Directus custom icons.
- `description` — A short description (<80 characters) of this display shown in the App.
- `component` — A reference to your display component.
- `options` — The options of your display. Can be either an options object or a dedicated Vue component.
- `types` — An array of supported types.
- `groups` — An array of field-groups. Accepts `standard`, `file`, `files`, `m2o`, `o2m`, `m2a`, `translations`. Defaults to `standard`.
- `fields` — If this option is set, the display will fetch relational fields. Can either be an array of fields or a function that returns an array of fields.

## # Display Component

The display component is the part of your extension that will be rendered by the Directus App whenever your display should be used to show the value of a field. This display component has to be Vue component. The most straightforward way to write a Vue component is to use the Vue Single File Component syntax.

Example of a display component using the Vue SFC syntax:

    <template>
    	<div>Value: {{ value }}</div>
    </template>

    <script>
    export default {
    	props: {
    		value: {
    			type: String,
    			default: null,
    		},
    	},
    };
    </script>

The current value of the field is provided to the component via the `value` prop. If you use the `fields` option to fetch relational fields, the `value` prop will be an object with the requested fields as keys and their respective values.

#### # Available Props

- `value` — The value of the field.
- `interface` - The interface of the field.
- `interfaceOptions` - The options for the field's interface.
- `type` — The type of the field.
- `collection` — The collection name of the field.
- `field` — The key of the field.

Other than this simple API to communicate with the Directus App, the display component is a blank canvas, allowing you to create anything you need.

Vue Version

The Directus App uses Vue 3. There might be 3rd party libraries that aren't yet compatible with Vue 3.

### # Functional Component

Instead of defining the component inside a Vue SFC file, you can use a functional component. This allows you to make simple displays that don't need a full component rendered:

    export default {
    	id: 'custom',
    	name: 'Custom',
    	icon: 'box',
    	description: 'This is my custom display!',
    	component: function ({ value }) {
    		return value.toLowerCase();
    	},
    	options: null,
    	types: ['string'],
    };

## # Accessing Internal Systems

To access internal systems like the API or the stores, you can use the `useApi()` and `useStores()` composables exported by the `@directus/extensions-sdk` package. They can be used inside a `setup()` function like this:

    import { useApi, useStores } from '@directus/extensions-sdk';

    export default {
    	setup() {
    		const api = useApi();

    		const { useCollectionsStore } = useStores();
    		const collectionsStore = useCollectionsStore();

    		// ...
    	},
    };

Vue Options API

If you prefer to use the Vue Options API, you can inject the `api` and `stores` properties directly.