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| export default () => { | |
| return new Promise((resolve) => { | |
| const on = () => resolve(true) // is in private mode | |
| const off = () => resolve(false) // not private mode | |
| const testLocalStorage = () => { | |
| try { | |
| if (window.localStorage.length) { | |
| return off() | |
| } else { | |
| window.localStorage.x = 1 | |
| window.localStorage.removeItem('x') | |
| return off() | |
| } | |
| } catch (e) { | |
| return navigator.cookieEnabled ? on() : off() | |
| } | |
| } | |
| // Chrome & Opera | |
| if (window.webkitRequestFileSystem) { | |
| return void window.webkitRequestFileSystem(0, 0, off, on) | |
| } | |
| // Firefox | |
| if ('MozAppearance' in document.documentElement.style) { | |
| const db = window.indexedDB.open('test') | |
| db.onerror = on | |
| db.onsuccess = off | |
| return void 0 | |
| } | |
| // IE10+ & Edge | |
| if (!window.indexedDB && (window.PointerEvent || window.MSPointerEvent)) { | |
| return on() | |
| } | |
| // Safari | |
| if (/Safari/.test(window.navigator.userAgent) && navigator.cookieEnabled && window.localStorage) { | |
| return testLocalStorage() | |
| } | |
| // others | |
| return off() | |
| }) | |
| } |
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