// 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; | |
})(); | |
} |
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Very helpful! I assume the 2480 at the end of line 32 is a typo? |
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This doesn't work on Safari 9.0 on OS X El Capitan. I get: |
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The problem seems not to be only with Safari 9.0 but also if the user disables local storage in the browser completely .. in Chrome the following error is thrown: I've made slight modification and wrapped this block in a try - catch: |
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Warning - this polyfill will fail in many browsersEven with the try/catch block, localStorage will still be broken in many cases. When it is disabled due to some privacy settings, any attempts to access Here are some notable examples where it breaks:
The only reasonable workaround is using a wrapper instead of relying on |
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Works like a charm for me, we only have to remove the typo @bigotilda noticed ! |
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Nice! This method is working correctly in Safari Private Mode. Thanks |
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you rock!,..... you're the man! Thanks. |
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I created a working one based on this. |
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thank you!