-
-
Save jarrodirwin/0ce4c0888336b533b2c4 to your computer and use it in GitHub Desktop.
LocalStorage/SessionStorage Polyfill with Safari Private Browsing support.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
// Refer to https://gist.github.com/remy/350433 | |
try { | |
// Test webstorage existence. | |
if (!window.localStorage || !window.sessionStorage) throw "exception"; | |
// Test webstorage accessibility - Needed for Safari private browsing. | |
localStorage.setItem('storage_test', 1); | |
localStorage.removeItem('storage_test'); | |
} catch(e) { | |
(function () { | |
var Storage = function (type) { | |
function createCookie(name, value, days) { | |
var date, expires; | |
if (days) { | |
date = new Date(); | |
date.setTime(date.getTime()+(days*24*60*60*1000)); | |
expires = "; expires="+date.toGMTString(); | |
} else { | |
expires = ""; | |
} | |
document.cookie = name+"="+value+expires+"; path=/"; | |
} | |
function readCookie(name) { | |
var nameEQ = name + "=", | |
ca = document.cookie.split(';'), | |
i, c; | |
for (i=0; i < ca.length; i++) { | |
c = ca[i]; | |
while (c.charAt(0)==' ') { | |
c = c.substring(1,c.length); 2480 | |
} | |
if (c.indexOf(nameEQ) == 0) { | |
return c.substring(nameEQ.length,c.length); | |
} | |
} | |
return null; | |
} | |
function setData(data) { | |
// Convert data into JSON and encode to accommodate for special characters. | |
data = encodeURIComponent(JSON.stringify(data)); | |
// Create cookie. | |
if (type == 'session') { | |
createCookie(getSessionName(), data, 365); | |
} else { | |
createCookie('localStorage', data, 365); | |
} | |
} | |
function clearData() { | |
if (type == 'session') { | |
createCookie(getSessionName(), '', 365); | |
} else { | |
createCookie('localStorage', '', 365); | |
} | |
} | |
function getData() { | |
// Get cookie data. | |
var data = type == 'session' ? readCookie(getSessionName()) : readCookie('localStorage'); | |
// If we have some data decode, parse and return it. | |
return data ? JSON.parse(decodeURIComponent(data)) : {}; | |
} | |
function getSessionName() { | |
// If there is no name for this window, set one. | |
// To ensure it's unquie use the current timestamp. | |
if(!window.name) { | |
window.name = new Date().getTime(); | |
} | |
return 'sessionStorage' + window.name; | |
} | |
// Initialise if there's already data. | |
var data = getData(); | |
return { | |
length: 0, | |
clear: function () { | |
data = {}; | |
this.length = 0; | |
clearData(); | |
}, | |
getItem: function (key) { | |
return data[key] === undefined ? null : data[key]; | |
}, | |
key: function (i) { | |
// not perfect, but works | |
var ctr = 0; | |
for (var k in data) { | |
if (ctr == i) return k; | |
else ctr++; | |
} | |
return null; | |
}, | |
removeItem: function (key) { | |
delete data[key]; | |
this.length--; | |
setData(data); | |
}, | |
setItem: function (key, value) { | |
data[key] = value+''; // forces the value to a string | |
this.length++; | |
setData(data); | |
} | |
}; | |
}; | |
// Replace window.localStorage and window.sessionStorage with out custom | |
// implementation. | |
var localStorage = new Storage('local'); | |
var sessionStorage = new Storage('session'); | |
window.localStorage = localStorage; | |
window.sessionStorage = sessionStorage; | |
// For Safari private browsing need to also set the proto value. | |
window.localStorage.__proto__ = localStorage; | |
window.sessionStorage.__proto__ = sessionStorage; | |
})(); | |
} |
The method really works. I was just looking for something like this. I have never worked with the Safari browser at all and I recently had to get acquainted with it. I also read about private browsing safari, a friend sent me some informative information https://moonlock.com/private-browsing-safari and by the way, now I only use safari! It's really very minimalistic and comfortable. It also turns out to be well protected.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Just what I was looking for.