Does a divorce occur if the husband swore an oath of divorce that his wife would not download any social media applications, and then she downloaded one, not knowing if it was included in the oath or not, and then deleted it immediately?

Swearing an oath by divorce has the ruling of a conditional divorce. If the one who swears the oath breaks it, the divorce occurs, regardless of whether the swearer intended divorce or merely a threat. This is the view of the majority of jurists. If what the wife did is what the husband intended to prevent her from doing, then divorce has occurred. Its occurrence is not prevented by her quickly deleting it, or by anger, as long as the husband is aware of what he is saying. One must guard against anger and be cautious of rushing to swear an oath by divorce. The wife must obey her husband in matters that do not involve disobedience.