@alpl said in one progress-bar for tabbar->tabs(s): Greetings from Luxembourg, when a tabbar is used, loading two different html pages (see example below), each tab fetching separate json data ( on init ), the tab finishing the fetch first, will stop the progress-bar. You can addEventLister “post change” event to document or ons-tab when you want to fetch data, https://onsen.io/v2/api/js/ons-segment.html#event-postchange For me, is better to separate the fetches to have more control, but if data are linked together, maybe is better grouping them