Created
September 16, 2011 03:13
-
-
Save sofish/1221115 to your computer and use it in GitHub Desktop.
Cross-browser TextStorage Solution
This file contains hidden or 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
| /** | |
| * @ NAME: Cross-browser TextStorage | |
| * @ DESC: text storage solution for your pages | |
| * @ COPY: sofish, http://sofish.de | |
| */ | |
| typeof window.localStorage == 'undefined' && ~function () { | |
| var localStorage = window.localStorage = {}, | |
| prefix = 'data-userdata', | |
| doc = document, | |
| attrSrc = doc.body, | |
| // save attributeNames to <body>'s `data-userdata` attribute | |
| mark = function (key, isRemove, temp, reg) { | |
| attrSrc.load(prefix); | |
| temp = attrSrc.getAttribute(prefix) || ''; | |
| reg = RegExp('\\b' + key + '\\b,?', 'i'); | |
| var hasKey = reg.test(temp) ? 1 : 0; | |
| temp = isRemove ? temp.replace(reg, '') : hasKey ? temp : temp === '' ? key : temp.split(',').concat(key).join(','); | |
| alert(temp); | |
| attrSrc.setAttribute(prefix, temp); | |
| attrSrc.save(prefix); | |
| }; | |
| // add IE behavior support | |
| attrSrc.addBehavior('#default#userData'); | |
| localStorage.getItem = function (key) { | |
| attrSrc.load(key); | |
| return attrSrc.getAttribute(key); | |
| }; | |
| localStorage.setItem = function (key, value) { | |
| attrSrc.setAttribute(key, value); | |
| attrSrc.save(key); | |
| mark(key); | |
| }; | |
| localStorage.removeItem = function (key) { | |
| attrSrc.removeAttribute(key); | |
| attrSrc.save(key); | |
| mark(key, 1); | |
| }; | |
| // clear all attributes on <body> tag that using for textStorage | |
| // and clearing them from the | |
| // 'data-userdata' attribute's value of <body> tag | |
| localStorage.clear = function () { | |
| attrSrc.load(prefix); | |
| var attrs = attrSrc.getAttribute(prefix).split(','), | |
| len = attrs.length; | |
| if (attrs[0] === '') return; | |
| for (var i = 0; i < len; i++) { | |
| attrSrc.removeAttribute(attrs[i]); | |
| attrSrc.save(attrs[i]); | |
| }; | |
| attrSrc.setAttribute(prefix, ''); | |
| attrSrc.save(prefix); | |
| }; | |
| }(); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
I also use this behavior in general, but the approach is useless because IE userData is per folder. This restricts the url structure a lot. My workaround is to have a single Iframe that contains the userData. This way, I have a shared localStorage. The only drawback is that I have to rely on an iframe load event that will usually fire after the main page load event.