<button class="{{ calepin_theme_toggle_class | default("calepin-theme-button") }}" type="button" aria-label="Theme" title="Theme" data-calepin-theme-toggle data-calepin-theme-storage-key="{{ calepin_theme_toggle_storage_key | default("calepin-theme") }}"{% if calepin_theme_toggle_param | default("") %} data-calepin-theme-param="{{ calepin_theme_toggle_param }}"{% endif %}>Theme</button>