Add store.js for client storage.

store.js/.gitignore

+node_modules

store.js/Changelog

+v1.3.3
++ Fix IE keys beginning with numeric characters (nice find @pauldwaite)
+
+v1.3.2
++ Implement store.getAll() (patch by @blq)
+
+v1.3.0
++ Use uglify.js for minifying store.min.js and store+json.min.js
++ Add build script
+
+v1.2.0
++ Remove same-path restrictions in IE6/7! (Thanks @mjpizz!)
++ Support CommonJS and AMD module systems (Thanks @pereckerdal!)
++ Fix: store.set('foo', undefined); store.get('foo') no longer throws (Thanks @buger!)
+
+v1.1.1
++ Publish in npm as "store" rather than "store.js"
++ Add commonjs export for require support
++ Add supported browsers Chrome 6-11, Firefox 4.0
+
+v1.1.0
++ First versioned version.
++ API: store.set, store.get, store.remove, store.clear, store.transact
++ Minified versions are included: store.min.js for store.js only, and store+json2.min.js for store.js and json2.js
+
+TODO
+- Get around IE6/7 per-directory restrition. @lrbabe/@louis_remi had the idea of putting the store.js API in an anonymous iframe a la https://github.com/meebo/embed-code and see what directory restriction that would fall under

store.js/README.md

+store.js
+========
+
+store.js exposes a simple API for cross browser local storage
+
+	// Store 'marcus' at 'username'
+	store.set('username', 'marcus')
+	
+	// Get 'username'
+	store.get('username')
+	
+	// Remove 'username'
+	store.remove('username')
+	
+	// Clear all keys
+	store.clear()
+	
+	// Store an object literal - store.js uses JSON.stringify under the hood
+	store.set('user', { name: 'marcus', likes: 'javascript' })
+	
+	// Get the stored object - store.js uses JSON.parse under the hood
+	var user = store.get('user')
+	alert(user.name + ' likes ' + user.likes)
+
+store.js depends on JSON for serialization.
+
+How does it work?
+------------------
+store.js uses localStorage when available, and falls back on globalStorage for earlier versions of Firefox and the userData behavior in IE6 and IE7. No flash to slow down your page load. No cookies to fatten your network requests.
+
+Screencast
+-----------
+[Introductory Screencast to Store.js](http://javascriptplayground.com/blog/2012/06/javascript-local-storage-store-js-tutorial) by Jack Franklin.
+
+
+`store.enabled` - check that localStorage is available
+-------------------------------------------------------
+To check that persistance is available, you can use the `store.enabled` flag:
+
+	if( store.enabled ) {
+		console.log("localStorage is available");
+	} else {
+		//time to fallback
+	}
+
+Please note that `store.disabled` does exist but is deprecated in favour of `store.enabled`.
+
+There are conditions where localStorage may appear to be available but will throw an error when used. For example, Safari's private browsing mode does this, and some browser allow the user to temporarily disable localStorage. Store.js detects these conditions and sets the `store.enabled` flag accordingly.
+
+
+
+Serialization
+-------------
+localStorage, when used without store.js, calls toString on all stored values. This means that you can't conveniently store and retrieve numbers, objects or arrays:
+
+	localStorage.myage = 24
+	localStorage.myage !== 24
+	localStorage.myage === '24'
+	
+	localStorage.user = { name: 'marcus', likes: 'javascript' }
+	localStorage.user === "[object Object]"
+	
+	localStorage.tags = ['javascript', 'localStorage', 'store.js']
+	localStorage.tags.length === 32
+	localStorage.tags === "javascript,localStorage,store.js"
+
+What we want (and get with store.js) is
+
+	store.set('myage', 24)
+	store.get('myage') === 24
+	
+	store.set('user', { name: 'marcus', likes: 'javascript' })
+	alert("Hi my name is " + store.get('user').name + "!")
+	
+	store.set('tags', ['javascript', 'localStorage', 'store.js'])
+	alert("We've got " + store.get('tags').length + " tags here")
+
+The native serialization engine of javascript is JSON. Rather than leaving it up to you to serialize and deserialize your values, store.js uses JSON.stringify() and JSON.parse() on each call to store.set() and store.get(), respectively.
+
+Some browsers do not have native support for JSON. For those browsers you should include [JSON.js] (non-minified copy is included in this repo).
+
+Tests
+-----
+Go to test.html in your browser.
+
+(Note that test.html must be served over http:// or https://. This is because localStore does not work in some browsers when using the file:// protocol)
+
+Supported browsers
+------------------
+ - Tested in Firefox 2.0
+ - Tested in Firefox 3.0
+ - Tested in Firefox 3.5
+ - Tested in Firefox 3.6
+ - Tested in Firefox 4.0
+ - Tested in Chrome 5
+ - Tested in Chrome 6
+ - Tested in Chrome 7
+ - Tested in Chrome 8
+ - Tested in Chrome 10
+ - Tested in Chrome 11
+ - Tested in Safari 4
+ - Tested in Safari 5
+ - Tested in IE6
+ - Tested in IE7
+ - Tested in IE8
+ - Tested in Opera 10
+   - Opera 10.54
+
+Storage limits
+--------------
+ - IE6: 1MB
+ - IE7: 1MB
+
+Supported but broken (please help fix)
+--------------------------------------
+ - Chrome 4
+ - Opera 10.10
+
+Unsupported browsers
+-------------------
+ - Firefox 1.0: no means (beside cookies and flash)
+ - Safari 2: no means (beside cookies and flash)
+ - Safari 3: no synchronous api (has asynch sqlite api, but store.js is synch)
+ - Opera 9: don't know if there is synchronous api for storing data locally
+ - Firefox 1.5: don't know if there is synchronous api for storing data locally
+
+Forks
+----
+ - Original: https://github.com/marcuswestin/store.js
+ - Sans JSON support (simple key/values only): https://github.com/cloudhead/store.js
+ - jQueryfied version: https://github.com/whitmer/store.js 
+ - Lint.js passing version (with semi-colons): https://github.com/StevenBlack/store.js
+ 
+TODO
+----
+ - What are the storage capacities/restrictions per browser?
+ - I believe underlying APIs can throw under certain conditions. Where do we need try/catch?
+ - Test different versions of Opera 10.X explicitly
+
+
+  [JSON.js]: http://www.json.org/json2.js

store.js/build.js

+#!/usr/local/bin/node
+
+var fs = require('fs'),
+	uglify = require('uglify-js')
+
+var storeJS = fs.readFileSync(__dirname + '/store.js').toString(),
+	jsonJS = fs.readFileSync(__dirname + '/json.js').toString(),
+	copy = '/* Copyright (c) 2010-2012 Marcus Westin */'
+
+console.log('building and minifying...')
+buildFile(storeJS, 'store.min.js')
+buildFile(jsonJS + '\n\n' + storeJS, 'store+json2.min.js')
+console.log('done')
+
+function buildFile(js, name) {
+	var ast = uglify.parser.parse(js)
+	ast = uglify.uglify.ast_mangle(ast)
+	ast = uglify.uglify.ast_squeeze(ast)
+	var minifiedJS = uglify.uglify.gen_code(ast)
+	fs.writeFile(__dirname + '/' + name, copy + '\n' + minifiedJS)
+}
+

store.js/package.json

+{
+  "name": "store",
+  "description": "A localStorage wrapper for all browsers without using cookies or flash. Uses localStorage, globalStorage, and userData behavior under the hood",
+  "version": "1.3.3",
+  "homepage": "https://github.com/marcuswestin/store.js",
+  "author": "Marcus Westin <narcvs@gmail.com> (http://marcuswest.in)",
+  "contributors": [
+    "Matt Pizzimenti <mjpizz+github@gmail.com> (http://mjpizz.com)",
+    "Long Ouyang (https://github.com/longouyang)",
+    "Paul Irish (http://paulirish.com)",
+    "Guillermo Rauch <rauchg@gmail.com> (https://github.com/guille)",
+    "whitmer (https://github.com/whitmer)",
+    "Steven Black <steveb@stevenblack.com> (https://github.com/StevenBlack)",
+    "Marcus Tucker <info@marcustucker.com> (https://github.com/MarcusJT)",
+    "Leonid Bugaev <leonsbox@gmail.com> (https://github.com/buger)",
+    "Per Eckerdal <per.eckerdal@gmail.com> (https://github.com/pereckerdal)",
+    "Fredrik Blomqvist (https://github.com/blq)"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/marcuswestin/store.js.git"
+  },
+  "bugs": {
+    "url": "http://github.com/marcuswestin/store.js/issues"
+  },
+  "engines": {
+    "browser": "*",
+    "node": "*"
+  },
+  "licenses": [
+    {
+      "type": "MIT",
+      "url": "https://raw.github.com/marcuswestin/store.js/master/store.js"
+    }
+  ],
+  "main": "store",
+  "directories": {
+    "lib": "."
+  },
+  "devDependencies": {
+    "uglify-js": "v1.2.5"
+  },
+  "files": [
+    ""
+  ]
+}

store.js/store+json2.min.js

+/* Copyright (c) 2010-2012 Marcus Westin */
+this.JSON||(this.JSON={}),function(){function f(a){return a<10?"0"+a:a}function quote(a){return escapable.lastIndex=0,escapable.test(a)?'"'+a.replace(escapable,function(a){var b=meta[a];return typeof b=="string"?b:"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)})+'"':'"'+a+'"'}function str(a,b){var c,d,e,f,g=gap,h,i=b[a];i&&typeof i=="object"&&typeof i.toJSON=="function"&&(i=i.toJSON(a)),typeof rep=="function"&&(i=rep.call(b,a,i));switch(typeof i){case"string":return quote(i);case"number":return isFinite(i)?String(i):"null";case"boolean":case"null":return String(i);case"object":if(!i)return"null";gap+=indent,h=[];if(Object.prototype.toString.apply(i)==="[object Array]"){f=i.length;for(c=0;c<f;c+=1)h[c]=str(c,i)||"null";return e=h.length===0?"[]":gap?"[\n"+gap+h.join(",\n"+gap)+"\n"+g+"]":"["+h.join(",")+"]",gap=g,e}if(rep&&typeof rep=="object"){f=rep.length;for(c=0;c<f;c+=1)d=rep[c],typeof d=="string"&&(e=str(d,i),e&&h.push(quote(d)+(gap?": ":":")+e))}else for(d in i)Object.hasOwnProperty.call(i,d)&&(e=str(d,i),e&&h.push(quote(d)+(gap?": ":":")+e));return e=h.length===0?"{}":gap?"{\n"+gap+h.join(",\n"+gap)+"\n"+g+"}":"{"+h.join(",")+"}",gap=g,e}}typeof Date.prototype.toJSON!="function"&&(Date.prototype.toJSON=function(a){return isFinite(this.valueOf())?this.getUTCFullYear()+"-"+f(this.getUTCMonth()+1)+"-"+f(this.getUTCDate())+"T"+f(this.getUTCHours())+":"+f(this.getUTCMinutes())+":"+f(this.getUTCSeconds())+"Z":null},String.prototype.toJSON=Number.prototype.toJSON=Boolean.prototype.toJSON=function(a){return this.valueOf()});var cx=/[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,escapable=/[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,gap,indent,meta={"\b":"\\b","\t":"\\t","\n":"\\n","\f":"\\f","\r":"\\r",'"':'\\"',"\\":"\\\\"},rep;typeof JSON.stringify!="function"&&(JSON.stringify=function(a,b,c){var d;gap="",indent="";if(typeof c=="number")for(d=0;d<c;d+=1)indent+=" ";else typeof c=="string"&&(indent=c);rep=b;if(!b||typeof b=="function"||typeof b=="object"&&typeof b.length=="number")return str("",{"":a});throw new Error("JSON.stringify")}),typeof JSON.parse!="function"&&(JSON.parse=function(text,reviver){function walk(a,b){var c,d,e=a[b];if(e&&typeof e=="object")for(c in e)Object.hasOwnProperty.call(e,c)&&(d=walk(e,c),d!==undefined?e[c]=d:delete e[c]);return reviver.call(a,b,e)}var j;text=String(text),cx.lastIndex=0,cx.test(text)&&(text=text.replace(cx,function(a){return"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)}));if(/^[\],:{}\s]*$/.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,"@").replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,"]").replace(/(?:^|:|,)(?:\s*\[)+/g,"")))return j=eval("("+text+")"),typeof reviver=="function"?walk({"":j},""):j;throw new SyntaxError("JSON.parse")})}(),function(){function h(){try{return d in b&&b[d]}catch(a){return!1}}function i(){try{return e in b&&b[e]&&b[e][b.location.hostname]}catch(a){return!1}}var a={},b=window,c=b.document,d="localStorage",e="globalStorage",f="__storejs__",g;a.disabled=!1,a.set=function(a,b){},a.get=function(a){},a.remove=function(a){},a.clear=function(){},a.transact=function(b,c,d){var e=a.get(b);d==null&&(d=c,c=null),typeof e=="undefined"&&(e=c||{}),d(e),a.set(b,e)},a.getAll=function(){},a.serialize=function(a){return JSON.stringify(a)},a.deserialize=function(a){return typeof a!="string"?undefined:JSON.parse(a)};if(h())g=b[d],a.set=function(b,c){if(c===undefined)return a.remove(b);g.setItem(b,a.serialize(c))},a.get=function(b){return a.deserialize(g.getItem(b))},a.remove=function(a){g.removeItem(a)},a.clear=function(){g.clear()},a.getAll=function(){var b={};for(var c=0;c<g.length;++c){var d=g.key(c);b[d]=a.get(d)}return b};else if(i())g=b[e][b.location.hostname],a.set=function(b,c){if(c===undefined)return a.remove(b);g[b]=a.serialize(c)},a.get=function(b){return a.deserialize(g[b]&&g[b].value)},a.remove=function(a){delete g[a]},a.clear=function(){for(var a in g)delete g[a]},a.getAll=function(){var b={};for(var c=0;c<g.length;++c){var d=g.key(c);b[d]=a.get(d)}return b};else if(c.documentElement.addBehavior){var j,k;try{k=new ActiveXObject("htmlfile"),k.open(),k.write('<script>document.w=window</script><iframe src="/favicon.ico"></frame>'),k.close(),j=k.w.frames[0].document,g=j.createElement("div")}catch(l){g=c.createElement("div"),j=c.body}function m(b){return function(){var c=Array.prototype.slice.call(arguments,0);c.unshift(g),j.appendChild(g),g.addBehavior("#default#userData"),g.load(d);var e=b.apply(a,c);return j.removeChild(g),e}}function n(a){return"_"+a}a.set=m(function(b,c,e){c=n(c);if(e===undefined)return a.remove(c);b.setAttribute(c,a.serialize(e)),b.save(d)}),a.get=m(function(b,c){return c=n(c),a.deserialize(b.getAttribute(c))}),a.remove=m(function(a,b){b=n(b),a.removeAttribute(b),a.save(d)}),a.clear=m(function(a){var b=a.XMLDocument.documentElement.attributes;a.load(d);for(var c=0,e;e=b[c];c++)a.removeAttribute(e.name);a.save(d)}),a.getAll=m(function(b){var c=b.XMLDocument.documentElement.attributes;b.load(d);var e={};for(var f=0,g;g=c[f];++f)e[g]=a.get(g);return e})}try{a.set(f,f),a.get(f)!=f&&(a.disabled=!0),a.remove(f)}catch(l){a.disabled=!0}typeof module!="undefined"?module.exports=a:typeof define=="function"&&define.amd?define(a):this.store=a}()
\ No newline at end of file

store.js/store.js

+/* Copyright (c) 2010-2012 Marcus Westin
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+;(function(){
+	var store = {},
+		win = window,
+		doc = win.document,
+		localStorageName = 'localStorage',
+		globalStorageName = 'globalStorage',
+		namespace = '__storejs__',
+		storage
+
+	store.disabled = false
+	store.set = function(key, value) {}
+	store.get = function(key) {}
+	store.remove = function(key) {}
+	store.clear = function() {}
+	store.transact = function(key, defaultVal, transactionFn) {
+		var val = store.get(key)
+		if (transactionFn == null) {
+			transactionFn = defaultVal
+			defaultVal = null
+		}
+		if (typeof val == 'undefined') { val = defaultVal || {} }
+		transactionFn(val)
+		store.set(key, val)
+	}
+	store.getAll = function() {}
+
+	store.serialize = function(value) {
+		return JSON.stringify(value)
+	}
+	store.deserialize = function(value) {
+		if (typeof value != 'string') { return undefined }
+		return JSON.parse(value)
+	}
+
+	// Functions to encapsulate questionable FireFox 3.6.13 behavior
+	// when about.config::dom.storage.enabled === false
+	// See https://github.com/marcuswestin/store.js/issues#issue/13
+	function isLocalStorageNameSupported() {
+		try { return (localStorageName in win && win[localStorageName]) }
+		catch(err) { return false }
+	}
+
+	function isGlobalStorageNameSupported() {
+		try { return (globalStorageName in win && win[globalStorageName] && win[globalStorageName][win.location.hostname]) }
+		catch(err) { return false }
+	}
+
+	if (isLocalStorageNameSupported()) {
+		storage = win[localStorageName]
+		store.set = function(key, val) {
+			if (val === undefined) { return store.remove(key) }
+			storage.setItem(key, store.serialize(val))
+		}
+		store.get = function(key) { return store.deserialize(storage.getItem(key)) }
+		store.remove = function(key) { storage.removeItem(key) }
+		store.clear = function() { storage.clear() }
+		store.getAll = function() {
+			var ret = {}
+			for (var i=0; i<storage.length; ++i) {
+				var key = storage.key(i)
+				ret[key] = store.get(key)
+			}
+			return ret
+		}
+	} else if (isGlobalStorageNameSupported()) {
+		storage = win[globalStorageName][win.location.hostname]
+		store.set = function(key, val) {
+			if (val === undefined) { return store.remove(key) }
+			storage[key] = store.serialize(val)
+		}
+		store.get = function(key) { return store.deserialize(storage[key] && storage[key].value) }
+		store.remove = function(key) { delete storage[key] }
+		store.clear = function() { for (var key in storage ) { delete storage[key] } }
+		store.getAll = function() {
+			var ret = {}
+			for (var i=0; i<storage.length; ++i) {
+				var key = storage.key(i)
+				ret[key] = store.get(key)
+			}
+			return ret
+		}
+
+	} else if (doc.documentElement.addBehavior) {
+		var storageOwner,
+			storageContainer
+		// Since #userData storage applies only to specific paths, we need to
+		// somehow link our data to a specific path.  We choose /favicon.ico
+		// as a pretty safe option, since all browsers already make a request to
+		// this URL anyway and being a 404 will not hurt us here.  We wrap an
+		// iframe pointing to the favicon in an ActiveXObject(htmlfile) object
+		// (see: http://msdn.microsoft.com/en-us/library/aa752574(v=VS.85).aspx)
+		// since the iframe access rules appear to allow direct access and
+		// manipulation of the document element, even for a 404 page.  This
+		// document can be used instead of the current document (which would
+		// have been limited to the current path) to perform #userData storage.
+		try {
+			storageContainer = new ActiveXObject('htmlfile')
+			storageContainer.open()
+			storageContainer.write('<s' + 'cript>document.w=window</s' + 'cript><iframe src="/favicon.ico"></frame>')
+			storageContainer.close()
+			storageOwner = storageContainer.w.frames[0].document
+			storage = storageOwner.createElement('div')
+		} catch(e) {
+			// somehow ActiveXObject instantiation failed (perhaps some special
+			// security settings or otherwse), fall back to per-path storage
+			storage = doc.createElement('div')
+			storageOwner = doc.body
+		}
+		function withIEStorage(storeFunction) {
+			return function() {
+				var args = Array.prototype.slice.call(arguments, 0)
+				args.unshift(storage)
+				// 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
+				storageOwner.appendChild(storage)
+				storage.addBehavior('#default#userData')
+				storage.load(localStorageName)
+				var result = storeFunction.apply(store, args)
+				storageOwner.removeChild(storage)
+				return result
+			}
+		}
+		function ieKeyFix(key) {
+			// In IE7, keys may not begin with numbers.
+			// See https://github.com/marcuswestin/store.js/issues/40#issuecomment-4617842
+			return '_'+key
+		}
+		store.set = withIEStorage(function(storage, key, val) {
+			key = ieKeyFix(key)
+			if (val === undefined) { return store.remove(key) }
+			storage.setAttribute(key, store.serialize(val))
+			storage.save(localStorageName)
+		})
+		store.get = withIEStorage(function(storage, key) {
+			key = ieKeyFix(key)
+			return store.deserialize(storage.getAttribute(key))
+		})
+		store.remove = withIEStorage(function(storage, key) {
+			key = ieKeyFix(key)
+			storage.removeAttribute(key)
+			storage.save(localStorageName)
+		})
+		store.clear = withIEStorage(function(storage) {
+			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)
+		})
+		store.getAll = withIEStorage(function(storage) {
+			var attributes = storage.XMLDocument.documentElement.attributes
+			storage.load(localStorageName)
+			var ret = {}
+			for (var i=0, attr; attr=attributes[i]; ++i) {
+				ret[attr] = store.get(attr)
+			}
+			return ret
+		})
+	}
+
+	try {
+		store.set(namespace, namespace)
+		if (store.get(namespace) != namespace) { store.disabled = true }
+		store.remove(namespace)
+	} catch(e) {
+		store.disabled = true
+	}
+	store.enabled = !store.disabled
+	
+	if (typeof module != 'undefined' && typeof module != 'function') { module.exports = store }
+	else if (typeof define === 'function' && define.amd) { define(store) }
+	else { this.store = store }
+})();

store.js/store.min.js

+/* Copyright (c) 2010-2012 Marcus Westin */
+(function(){function h(){try{return d in b&&b[d]}catch(a){return!1}}function i(){try{return e in b&&b[e]&&b[e][b.location.hostname]}catch(a){return!1}}var a={},b=window,c=b.document,d="localStorage",e="globalStorage",f="__storejs__",g;a.disabled=!1,a.set=function(a,b){},a.get=function(a){},a.remove=function(a){},a.clear=function(){},a.transact=function(b,c,d){var e=a.get(b);d==null&&(d=c,c=null),typeof e=="undefined"&&(e=c||{}),d(e),a.set(b,e)},a.getAll=function(){},a.serialize=function(a){return JSON.stringify(a)},a.deserialize=function(a){return typeof a!="string"?undefined:JSON.parse(a)};if(h())g=b[d],a.set=function(b,c){if(c===undefined)return a.remove(b);g.setItem(b,a.serialize(c))},a.get=function(b){return a.deserialize(g.getItem(b))},a.remove=function(a){g.removeItem(a)},a.clear=function(){g.clear()},a.getAll=function(){var b={};for(var c=0;c<g.length;++c){var d=g.key(c);b[d]=a.get(d)}return b};else if(i())g=b[e][b.location.hostname],a.set=function(b,c){if(c===undefined)return a.remove(b);g[b]=a.serialize(c)},a.get=function(b){return a.deserialize(g[b]&&g[b].value)},a.remove=function(a){delete g[a]},a.clear=function(){for(var a in g)delete g[a]},a.getAll=function(){var b={};for(var c=0;c<g.length;++c){var d=g.key(c);b[d]=a.get(d)}return b};else if(c.documentElement.addBehavior){var j,k;try{k=new ActiveXObject("htmlfile"),k.open(),k.write('<script>document.w=window</script><iframe src="/favicon.ico"></frame>'),k.close(),j=k.w.frames[0].document,g=j.createElement("div")}catch(l){g=c.createElement("div"),j=c.body}function m(b){return function(){var c=Array.prototype.slice.call(arguments,0);c.unshift(g),j.appendChild(g),g.addBehavior("#default#userData"),g.load(d);var e=b.apply(a,c);return j.removeChild(g),e}}function n(a){return"_"+a}a.set=m(function(b,c,e){c=n(c);if(e===undefined)return a.remove(c);b.setAttribute(c,a.serialize(e)),b.save(d)}),a.get=m(function(b,c){return c=n(c),a.deserialize(b.getAttribute(c))}),a.remove=m(function(a,b){b=n(b),a.removeAttribute(b),a.save(d)}),a.clear=m(function(a){var b=a.XMLDocument.documentElement.attributes;a.load(d);for(var c=0,e;e=b[c];c++)a.removeAttribute(e.name);a.save(d)}),a.getAll=m(function(b){var c=b.XMLDocument.documentElement.attributes;b.load(d);var e={};for(var f=0,g;g=c[f];++f)e[g]=a.get(g);return e})}try{a.set(f,f),a.get(f)!=f&&(a.disabled=!0),a.remove(f)}catch(l){a.disabled=!0}typeof module!="undefined"?module.exports=a:typeof define=="function"&&define.amd?define(a):this.store=a})()
\ No newline at end of file

store.js/test.html

+<!DOCTYPE html>
+<head>
+	<title>store.js test</title>
+	<style type="text/css">
+		body { margin: 50px; font-family: helvetica; color: #333; }
+		div { color: green; }
+		#errorOutput div { color: red; }
+	</style>
+	<script src="json.js"></script>
+	<script src="store.js"></script>
+</head>
+<body>
+	tests for <a href="http://github.com/marcuswestin/store.js">store.js</a>
+	<div id="errorOutput"></div>
+
+	<script>
+		(function() {
+			var doc = document,
+				errorOutput = doc.getElementById('errorOutput'),
+				testFailed = false,
+				isSecondPass = (doc.location.hash == '#secondPass')
+
+			function outputError(msg) { errorOutput.appendChild(doc.createElement('div')).innerHTML = msg }
+			function assert(truthy, msg) { 
+				if (!truthy) {
+					outputError((isSecondPass ? 'second' : 'first') + ' pass bad assert: ' + msg);
+					if (store.disabled) { outputError('<br>Note that store.disabled == true') }
+					testFailed = true
+				}
+			}
+			
+			function doFirstPass() {
+				store.clear()
+				
+				store.set('foo', 'bar')
+				assert(store.get('foo') == 'bar', "stored key 'foo' not equal to stored value 'bar'")
+
+				store.remove('foo')
+				assert(store.get('foo') == null, "removed key 'foo' not null")
+
+				store.set('foo', 'bar1')
+				store.set('foo', 'bar2')
+				assert(store.get('foo') == 'bar2', "key 'foo' is not equal to second value set 'bar2'")
+				
+				store.set('foo', 'bar')
+				store.set('bar', 'foo')
+				store.remove('foo')
+				assert(store.get('bar') == 'foo', "removing key 'foo' also removed key 'bar'")
+				
+				store.set('foo', 'bar')
+				store.set('bar', 'foo')
+				store.clear()
+				assert(store.get('foo') == null && store.get('bar') == null, "keys foo and bar not cleared after store cleared")
+				
+				store.transact('foosact', function(val) {
+					assert(typeof val == 'object', "new key is not an object at beginning of transaction")
+					val.foo = 'foo'
+				})
+				store.transact('foosact', function(val) {
+					assert(val.foo == 'foo', "first transaction did not register")
+					val.bar = 'bar'
+				})
+				assert(store.get('foosact').bar == 'bar', "second transaction did not register")
+
+				store.set('foo', { name: 'marcus', arr: [1,2,3] })
+				assert(typeof store.get('foo') == 'object', "type of stored object 'foo' is not 'object'")
+				assert(store.get('foo') instanceof Object, "stored object 'foo' is not an instance of Object")
+				assert(store.get('foo').name == 'marcus', "property 'name' of stored object 'foo' is not 'marcus'")
+				assert(store.get('foo').arr instanceof Array, "Array property 'arr' of stored object 'foo' is not an instance of Array")
+				assert(store.get('foo').arr.length == 3, "The length of Array property 'arr' stored on object 'foo' is not 3")
+
+				assert(store.enabled = !store.disabled, "Store.enabled is not the reverse of .disabled");
+				
+				store.remove('circularReference')
+				var circularOne = {}
+				var circularTwo = { one:circularOne }
+				circularOne.two = circularTwo
+				var threw = false
+				try { store.set('circularReference', circularOne) }
+				catch(e) { threw = true }
+				assert(threw, "storing object with circular reference did not throw")
+				assert(!store.get('circularReference'), "attempting to store object with circular reference which should have faile affected store state")
+
+				// The following stored values get tested in doSecondPass after a page reload
+				store.set('firstPassFoo', 'bar')
+				store.set('firstPassObj', { woot: true })
+				
+				var all = store.getAll()
+				assert(all.firstPassFoo == 'bar', 'getAll gets firstPassFoo')
+				assert(countProperties(all) == 4, 'getAll gets all 4 values')
+			}
+			
+			function doSecondPass() {
+				assert(store.get('firstPassFoo') == 'bar', "first pass key 'firstPassFoo' not equal to stored value 'bar'")
+				
+				var all = store.getAll()
+				assert(all.firstPassFoo == 'bar', "getAll still gets firstPassFoo on second pass")
+				assert(countProperties(all) == 4, "getAll gets all 4 values")
+				
+				store.clear()
+				assert(store.get('firstPassFoo') == null, "first pass key 'firstPassFoo' not null after store cleared")
+				
+				var all = store.getAll()
+				assert(countProperties(all) == 0, "getAll returns 0 properties after store.clear() has been called")
+			}
+			
+			function countProperties(obj) {
+				var count = 0
+				for (var key in obj) {
+					if (obj.hasOwnProperty(key)) { count++ }
+				}
+				return count
+			}
+			
+			try {
+				if (isSecondPass) { doSecondPass() }
+				else { doFirstPass() }
+			} catch(e) {
+				assert(false, 'Tests should not throw: "' + JSON.stringify(e) + '"')
+			}
+
+			if (!testFailed) {
+				if (!isSecondPass) {
+					doc.location.hash = '#secondPass'
+					doc.location.reload()
+				} else {
+					doc.location.hash = '#'
+					doc.body.appendChild(doc.createElement('div')).innerHTML = 'Tests passed'
+				}
+			}
+		})()
+	</script>
+</body>
+</html>