codekart
Version:
Web application framework for Node.js
74 lines (68 loc) • 2.9 kB
JavaScript
/**
* Copyright (c) 2010-2012 Marcus Westin 本地储存跨浏览器兼容封装
* 方法：
* .get(n)
* .set(k,v)
* .remove(n)
* .clear()
*/
C.store = (function () {
var api = {},
win = window,
doc = win.document,
localStorageName = 'localStorage',
globalStorageName = 'globalStorage',
storage;
api.set = function (key, value) {};
api.get = function (key) {};
api.remove = function (key) {};
api.clear = function () {};
if (localStorageName in win && win[localStorageName]) {
storage = win[localStorageName];
api.set = function (key, val) { storage.setItem(key, val) };
api.get = function (key) { return storage.getItem(key) };
api.remove = function (key) { storage.removeItem(key) };
api.clear = function () { storage.clear() };
} else if (globalStorageName in win && win[globalStorageName]) {
storage = win[globalStorageName][win.location.hostname];
api.set = function (key, val) { storage[key] = val };
api.get = function (key) { return storage[key] && storage[key].value };
api.remove = function (key) { delete storage[key] };
api.clear = function () { for (var key in storage ) { delete storage[key] } };
} else if (doc.documentElement.addBehavior) {
function getStorage() {
if (storage) { return storage }
storage = doc.body.appendChild(doc.createElement('div'));
storage.style.display = 'none';
// See http://msdn.microsoft.com/en-us/library/ms531081(v=VS.85).aspx
// and http://msdn.microsoft.com/en-us/library/ms531424(v=VS.85).aspx
storage.addBehavior('#default#userData');
storage.load(localStorageName);
return storage;
}
api.set = function (key, val) {
var storage = getStorage();
storage.setAttribute(key, val);
storage.save(localStorageName);
};
api.get = function (key) {
var storage = getStorage();
return storage.getAttribute(key);
};
api.remove = function (key) {
var storage = getStorage();
storage.removeAttribute(key);
storage.save(localStorageName);
}
api.clear = function () {
var storage = getStorage();
var attributes = storage.XMLDocument.documentElement.attributes;;
storage.load(localStorageName);
for (var i=0, attr; attr = attributes[i]; i++) {
storage.removeAttribute(attr.name);
}
storage.save(localStorageName);
}
}
return api;
})();