How to check if ios uses private browsing

Question

One of my jquery plugins has problems, and the problem occurs when private browsing is enabled on ios.

Is there any way to check this?

Answer 1

In private mode, the user cannot use local storage, try the following:

var storageTestKey = 'sTest', storage = window.sessionStorage; try { storage.setItem(storageTestKey, 'test'); storage.removeItem(storageTestKey); } catch (e) { if (e.code === DOMException.QUOTA_EXCEEDED_ERR && storage.length === 0) { // private mode } else { throw e; } } 

Answer 2

I found Answear on GitHub and tested it: Working with iOS 11!

 var isPrivate = false; try { window.openDatabase(null, null, null, null); } catch (_) { isPrivate = true; } alert((isPrivate ? 'You\'re' : 'You aren\'t') + ' in private browsing mode');