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/** | |
* @ 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); | |
}; | |
}(); |
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