grafana/docs/sources/developers/plugins/create-a-grafana-plugin/extend-a-plugin/extend-the-grafana-ui-with-links.md

title	aliases	keywords	description	weight
Use extensions to add links to app plugins	../../../plugins/extend-the-grafana-ui-with-links/	grafana plugins plugin links extensions app plugins	Learn how to add links to the Grafana user interface from an app plugin	760

Use extensions to add links to app plugins

You can use the Plugin extensions API with your Grafana app plugins to add links to the Grafana UI. This feature lets you send users to your plugin's pages from other spots in the Grafana application.

Before you begin

Be sure your plugin meets the following requirements before proceeding:

• It must be an app plugin.
• It must be preloaded (by setting the [preload property]({{< relref "../../metadata.md" >}}) to true in the plugin.json
• It must be installed and enabled.

Available extension points within Grafana

An extension point is a location within the Grafana UI where a plugin can insert links. The IDs of all extension points within Grafana start with grafana/. For example, you can use the following extension point ID:

• grafana/dashboard/panel/menu: extension point for all panel dropdown menus in dashboards

Add a link extension within a Grafana dashboard panel menu

To add a link extension within a Grafana dashboard panel menu, complete the following steps:

1. Define the link extension in your plugin's module.ts file.

2. Define a new instance of the AppPlugin class by using the configureExtensionLink method. This method requires:

   • an object that describes your link extension, including a title property for the link text
   • an extensionPointId method that tells Grafana where the link should appear
   • a path for the user to go to your plugin

new AppPlugin().configureExtensionLink({
  title: 'Go to basic app',
  description: 'Will send the user to the basic app',
  extensionPointId: 'grafana/dashboard/panel/menu',
  path: '/a/myorg-basic-app/one', // Must start with "/a/<PLUGIN_ID>/"
});

Your link will now appear in dashboard panel menus. When the user clicks the link, they will be sent to the path you defined earlier.

{{% admonition type="note" %}} Each plugin is limited to a maximum of two links per extension point.{{% /admonition %}}

Add a link extension using context within Grafana

The above example works for simple cases. However, you may want to act on information from the app's panel from which the user is navigating.

To do this, use the configure property on the object that is passed to configureExtensionLink(). This property takes a function and returns an object that consists of a title property for the link text and a path to send the user to your plugin.

Alternatively, if you need to hide the link for certain scenarios, define the function to return undefined:

new AppPlugin().configureExtensionLink({
  title: 'Go to basic app',
  description: 'Will send the user to the basic app',
  extensionPointId: 'grafana/dashboard/panel/menu',
  path: '/a/myorg-basic-app/one',
  configure: (context: PanelContext) => {
    switch (context?.pluginId) {
      case 'timeseries':
        return {
          title: 'Go to page one',
          description: 'hello',
          path: '/a/myorg-basic-app/one',
        };

      case 'piechart':
        return {
          title: 'Go to page two',
          path: '/a/myorg-basic-app/two',
        };

      // Returning undefined tells Grafana to hide the link
      default:
        return undefined;
    }
  },
});

The above example demonstrates how to return a different path based on which plugin the dashboard panel is using. If the clicked-upon panel is neither a time series nor a pie chart panel, then the configure() function returns undefined. When this happens, Grafana doesn't render the link.

{{% admonition type="note" %}} The context passed to the configure() function is bound by the extensionPointId into which you insert the link. Different extension points contain different contexts.{{% /admonition %}}

Add an event handler to a link

Link extensions give you the means to direct users to a plugin page via href links within the Grafana UI. You can also use them to trigger onClick events to perform dynamic actions when clicked.

To add an event handler to a link in a panel menu, complete the following steps:

1. Define the link extension in the plugin's module.ts file.
2. Create a new instance of the AppPlugin class, again using the configureExtensionLink method. This time, add an onClick property which takes a function. This function receives the click event and an object consisting of the context and an openModal function.

In the following example, we open a dialog.

new AppPlugin().configureExtensionLink({
  title: 'Go to basic app',
  description: 'Will send the user to the basic app',
  extensionPointId: 'grafana/dashboard/panel/menu',
  path: '/a/myorg-basic-app/one',
  onClick: (event, { context, openModal }) => {
    event.preventDefault();
    openModal({
      title: 'My plugin dialog',
      body: ({ onDismiss }) => <SampleModal onDismiss={onDismiss} pluginId={context?.pluginId} />,
    });
  },
});

type Props = {
  onDismiss: () => void;
  pluginId?: string;
};

const SampleModal = ({ onDismiss, pluginId }: Props) => {
  return (
    <VerticalGroup spacing="sm">
      <p>This dialog was opened via the plugin extensions API.</p>
      <p>The panel is using a {pluginId} plugin to display data.</p>
    </VerticalGroup>
  );
};

As you can see, the plugin extensions API enables you to insert links into the UI of Grafana applications that send users to plugin features or trigger actions based on where the user clicked. The plugins extension API can also be used for [cross-plugin linking]({{< relref "./cross-plugin-linking" >}}).