LiveView currently exposes the following telemetry events:

• [:phoenix, :live_view, :mount, :start] - Dispatched by a Phoenix.LiveView immediately before mount/3 is invoked.

  • Measurement:

    %{system_time: System.monotonic_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      params: unsigned_params | :not_mounted_at_router,
      session: map,
      uri: String.t() | nil
    }

• [:phoenix, :live_view, :mount, :stop] - Dispatched by a Phoenix.LiveView when the mount/3 callback completes successfully.

  • Measurement:

    %{duration: native_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      params: unsigned_params | :not_mounted_at_router,
      session: map,
      uri: String.t() | nil
    }

• [:phoenix, :live_view, :mount, :exception] - Dispatched by a Phoenix.LiveView when an exception is raised in the mount/3 callback.

  • Measurement: %{duration: native_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      kind: atom,
      reason: term,
      params: unsigned_params | :not_mounted_at_router,
      session: map,
      uri: String.t() | nil
    }

• [:phoenix, :live_view, :handle_params, :start] - Dispatched by a Phoenix.LiveView immediately before handle_params/3 is invoked.

  • Measurement:

    %{system_time: System.monotonic_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      params: unsigned_params,
      uri: String.t()
    }

• [:phoenix, :live_view, :handle_params, :stop] - Dispatched by a Phoenix.LiveView when the handle_params/3 callback completes successfully.

  • Measurement:

    %{duration: native_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      params: unsigned_params,
      uri: String.t()
    }

• [:phoenix, :live_view, :handle_params, :exception] - Dispatched by a Phoenix.LiveView when an exception is raised in the handle_params/3 callback.

  • Measurement:

    %{duration: native_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      kind: atom,
      reason: term,
      params: unsigned_params,
      uri: String.t()
    }

• [:phoenix, :live_view, :handle_event, :start] - Dispatched by a Phoenix.LiveView immediately before handle_event/3 is invoked.

  • Measurement:

    %{system_time: System.monotonic_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      event: String.t(),
      params: unsigned_params
    }

• [:phoenix, :live_view, :handle_event, :stop] - Dispatched by a Phoenix.LiveView when the handle_event/3 callback completes successfully.

  • Measurement:

    %{duration: native_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      event: String.t(),
      params: unsigned_params
    }

• [:phoenix, :live_view, :handle_event, :exception] - Dispatched by a Phoenix.LiveView when an exception is raised in the handle_event/3 callback.

  • Measurement:

    %{duration: native_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      kind: atom,
      reason: term,
      event: String.t(),
      params: unsigned_params
    }

• [:phoenix, :live_view, :render, :start] - Dispatched by a Phoenix.LiveView immediately before a render starts. A render may invoke Phoenix.LiveView.render/1 or Phoenix.LiveComponent.render/1 callbacks.

  • Measurement:

    %{system_time: System.monotonic_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      force?: boolean,
      changed?: boolean
    }

    For component renders, the metadata also includes:

    %{
      component: module,
      id: term,
      cid: integer
    }

• [:phoenix, :live_view, :render, :stop] - Dispatched by a Phoenix.LiveView when a render completes successfully.

  • Measurement:

    %{duration: native_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      force?: boolean,
      changed?: boolean
    }

    For component renders, the metadata also includes:

    %{
      component: module,
      id: term,
      cid: integer
    }

• [:phoenix, :live_view, :render, :exception] - Dispatched by a Phoenix.LiveView when an exception is raised during a render.

  • Measurement:

    %{duration: native_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      kind: atom,
      reason: term,
      force?: boolean,
      changed?: boolean
    }

    For component renders, the metadata also includes:

    %{
      component: module,
      id: term,
      cid: integer
    }

• [:phoenix, :live_component, :update, :start] - Dispatched by a Phoenix.LiveComponent immediately before update/2 or a update_many/1 is invoked.

  In the case ofupdate/2 it might dispatch one event for multiple calls.

  • Measurement:

    %{system_time: System.monotonic_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      component: atom,
      assigns_sockets: [{map(), Phoenix.LiveView.Socket.t}]
    }

• [:phoenix, :live_component, :update, :stop] - Dispatched by a Phoenix.LiveComponent when the update/2 or a update_many/1 callback completes successfully.

  In the case ofupdate/2 it might dispatch one event for multiple calls. The sockets metadata contain the updated sockets.

  • Measurement:

    %{duration: native_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      component: atom,
      assigns_sockets: [{map(), Phoenix.LiveView.Socket.t}],
      sockets: [Phoenix.LiveView.Socket.t]
    }

• [:phoenix, :live_component, :update, :exception] - Dispatched by a Phoenix.LiveComponent when an exception is raised in the update/2 or a update_many/1 callback.

  In the case ofupdate/2 it might dispatch one event for multiple calls.

  • Measurement:

    %{duration: native_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      kind: atom,
      reason: term,
      component: atom,
      assigns_sockets: [{map(), Phoenix.LiveView.Socket.t}]
    }

• [:phoenix, :live_component, :handle_event, :start] - Dispatched by a Phoenix.LiveComponent immediately before handle_event/3 is invoked.

  • Measurement:

    %{system_time: System.monotonic_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      component: atom,
      event: String.t(),
      params: unsigned_params
    }

• [:phoenix, :live_component, :handle_event, :stop] - Dispatched by a Phoenix.LiveComponent when the handle_event/3 callback completes successfully.

  • Measurement:

    %{duration: native_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      component: atom,
      event: String.t(),
      params: unsigned_params
    }

• [:phoenix, :live_component, :handle_event, :exception] - Dispatched by a Phoenix.LiveComponent when an exception is raised in the handle_event/3 callback.

  • Measurement:

    %{duration: native_time}

  • Metadata:

    %{
      socket: Phoenix.LiveView.Socket.t,
      kind: atom,
      reason: term,
      component: atom,
      event: String.t(),
      params: unsigned_params
    }

• [:phoenix, :live_component, :destroyed] - Dispatched by a Phoenix.LiveComponent after it is destroyed. No measurement.

  • Metadata:

    %{

    socket: Phoenix.LiveView.Socket.t,
    component: atom,
    cid: integer(),
    live_view_socket: Phoenix.LiveView.Socket.t

    }