## Usage

The `<EmptyState />` component is used when there is no data to be displayed, for example:

- When no data exists yet.
- When an error getting the data has occurred.
- When no search results match the user's inputted search value.

For examples of implementation, refer to the [Filtering](/patterns/filtering/examples/) and [Tables](/patterns/tables/examples/#empty-states) patterns.

## Basic implementation

The most basic implementation of an `<EmptyState />` only requires a `title` and a `description`. The messaging should be concise, informative and communicate _why_ no data can be displayed.

Use the `headingLevel` prop to control the semantic heading level (rank) according to where in the page structure the empty state lives.

```tsx live
return <EmptyState title="No results found" description="Check your search value and try again." headingLevel={3} />;
```

## Actions

When possible, provide the user with actions they can take to see the data they need. Use the `primaryAction` prop to render a primary `<Button />` (or a `<ButtonLink />` if a `primaryAction.href` is defined). If there are more potential actions the user can take, use the `secondaryAction` prop to render a secondary button.

NOTE: A secondary action should never be used on its own.

```tsx live
return (
  <EmptyState
    title="Something went wrong"
    description="Refresh the page or try again later."
    primaryAction={{
      label: 'Primary action',
      onClick: () => alert('Primary action clicked'),
    }}
    secondaryAction={{
      label: 'Secondary action',
      onClick: () => alert('Secondary action clicked'),
    }}
  />
);
```

Button link example:

```tsx live
return (
  <EmptyState
    title="Page not found"
    description="Click to be redirected to the homepage."
    primaryAction={{
      label: 'Primary action',
      href: 'https://www.elmosoftware.com.au',
    }}
    secondaryAction={{
      label: 'Secondary action',
      href: 'https://www.elmosoftware.com.au',
    }}
  />
);
```

## Spot illustration

Optionally, provide a `spotIllustration` from the [Illustration](/packages/illustration/) package as a complement to convey the message of the empty state.

```tsx live
return (
  <EmptyState
    spotIllustration={LearningSpot}
    title="No courses found"
    description="Explore course catalogue to find new available courses."
    headingLevel={3}
  />
);
```

An inline message component to communicate why no data is displayed and what to do next.

EmptyState

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