Title

Set the text the browser shows in the tab and window title bar.

Standalone

To change the title after the app is running — for example, to reflect the current record — call the set_title frontend event from the backend:

METHOD z2ui5_if_app~main.

    CASE abap_true.

      WHEN client->check_on_init( ).
        client->view_display( z2ui5_cl_xml_view=>factory(
            )->page(
                )->button(
                    text  = `change title`
                    press = client->_event( `RENAME` )
            )->stringify( ) ).

      WHEN client->check_on_event( `RENAME` ).
        client->action->gen(
            val   = client->cs_event-set_title
            t_arg = VALUE #( ( `Invoice 4711` ) ) ).

    ENDCASE.

  ENDMETHOD.

Launchpad

When the app runs inside an SAP Fiori Launchpad shell, use the dedicated set_title_launchpad event instead. It forwards the title to the shell's ShellUIService rather than setting document.title:

client->action->gen(
    val   = client->cs_event-set_title_launchpad
    t_arg = VALUE #( ( `Invoice 4711` ) ) ).

Use set_title for the browser tab/window title (standalone) and set_title_launchpad for the launchpad shell title.