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| "use strict"; | |
| // check out https://jsfiddle.net/Lj2fs5kr/ | |
| new Promise(function (resolve) { | |
| var db = void 0, | |
| on = function on() { | |
| return resolve(true); | |
| }, | |
| off = function off() { | |
| return resolve(false); | |
| }, | |
| tryls = function tryls() { | |
| try { | |
| localStorage.length ? off() : (localStorage.x = 1, localStorage.removeItem("x"), off()); | |
| } catch (e) { | |
| on(); | |
| } | |
| }; | |
| // Blink | |
| window.webkitRequestFileSystem ? webkitRequestFileSystem(window.TEMPORARY, 1, off, on) | |
| // FF | |
| : "MozAppearance" in document.documentElement.style ? (db = indexedDB.open("test"), db.onerror = on, db.onsuccess = off | |
| // Safari | |
| ) : /constructor/i.test(window.HTMLElement) ? tryls() | |
| // IE10+ & edge | |
| : !window.indexedDB && (window.PointerEvent || window.MSPointerEvent) ? on() | |
| // Rest | |
| : off(); | |
| }).then(function (enabled) { | |
| document.body.innerHTML = enabled; | |
| }); |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| </head> | |
| <body> | |
| <script src="detect-private-browsing.js"></script> | |
| </body> | |
| </html> |
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