localStorage or sessionStorage to json, json to localStorage or sessionStorage, localStorage2json, json2localStorage, sessionStorage2json, json2sessionStorage

storageConverter.js

function storage2json(storage){
	/* storage2json, v1.5, Copytight 2017, MIT License, Vyach.Vasiliev
	
	The MIT License
	Copyright (c) 2017 Vyacheslav Vasiliev (vyach.vasiliev\аt\gmail\dоt\com)

	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.

	*/
	var res_obj = {},
		re_pass = /([\{\}\[\]\"\']|^\d+$|^(true|false)$)/,
		parse = function(value){
			if(value.match(re_pass)){
				return JSON.parse(value);
			}else{
				return JSON.parse('"'+ value +'"');
			}
		};
	for (var i=0, len=storage.length; i<len; i++) {
		res_obj[storage.key(i)] = parse(storage.getItem(storage.key(i)));
	}
	return JSON.stringify(res_obj)
}


function json2storage(json_data, storage){
	/* json2storage, v1.5, Copytight 2017, MIT License, Vyach.Vasiliev
	The MIT License
	Copyright (c) 2017 Vyacheslav Vasiliev (vyach.vasiliev\аt\gmail\dоt\com)

	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.
	
	*/
	var res_obj = JSON.parse(json_data),
		re_pass = /([\{\}\[\]\"\']|^\d+$|^(true|false)$)/,
		parse = function(value){
			if(value.match(re_pass)){
				return JSON.parse(value);
			}else{
				return JSON.parse('"'+ value +'"');
			}
		};
	for (var prop in res_obj) {
	  if (res_obj.hasOwnProperty(prop)) {
		storage.setItem(prop, JSON.stringify(res_obj[prop]));
	  } 
	}
	return true;
}

/* MINIFY */
function storage2json(e){/* Copyright (c) 2017 Vyacheslav Vasiliev (vyach.vasiliev\аt\gmail\dоt\com).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. */ for(var r={},t=/([\{\}\[\]\"\']|^\d+$|^(true|false)$)/,n=function(e){return e.match(t)?JSON.parse(e):JSON.parse('"'+e+'"')},a=0,s=e.length;s>a;a++)r[e.key(a)]=n(e.getItem(e.key(a)));return JSON.stringify(r)}
function json2storage(r,n){/* Copyright (c) 2017 Vyacheslav Vasiliev (vyach.vasiliev\аt\gmail\dоt\com).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. */var t=JSON.parse(r);for(var e in t)t.hasOwnProperty(e)&&n.setItem(e,JSON.stringify(t[e]));return!0}

/* HOW USAGE */
var storage = window.localStorage; // localStorage or sessionStorage
var b = storage2json(storage);
json2storage(b, storage);