The Editor the control renders a rich-text editor in the WordPress Customizer. The editor is the same WYSIWYG editor that WordPress used to use.
Example
new \Kirki\Field\Editor(
[
'settings' => 'editor_setting',
'label' => esc_html__( 'My Editor Control', 'kirki' ),
'description' => esc_html__( 'This is an editor control.', 'kirki' ),
'section' => 'section_id',
'default' => '',
]
);