storage.js

let localForage = {
	getItem: function (sKey) {
		if (!sKey || !this.hasOwnProperty(sKey)) {
			return null;
		}
		return unescape(document.cookie.replace(new RegExp("(?:^|.*;\\s*)" + escape(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*"), "$1"));
	},
	key: function (nKeyId) {
		return unescape(document.cookie.replace(/\s*\=(?:.(?!;))*$/, "").split(/\s*\=(?:[^;](?!;))*[^;]?;\s*/)[nKeyId]);
	},
	setItem: function (sKey, sValue) {
		if(!sKey) {
			return;
		}
		document.cookie = escape(sKey) + "=" + escape(sValue) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
		this.length = document.cookie.match(/\=/g).length;
	},
	length: 0,
	removeItem: function (sKey) {
		if (!sKey || !this.hasOwnProperty(sKey)) {
			return;
		}
		document.cookie = escape(sKey) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
		this.length--;
	},
	hasOwnProperty: function (sKey) {
		return (new RegExp("(?:^|;\\s*)" + escape(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=")).test(document.cookie);
	}
};
localForage.length = (document.cookie.match(/\=/g) || []).length;

let localStorageAdapter = {
	get: (key) => {
		const sortListDataRaw = (localStorage || localForage).getItem('OnoriStorage') || '{}';
		const sortListData = JSON.parse(sortListDataRaw);
		return sortListData[key];
	},

	set: (key, value) => {
		const sortListDataRaw = (localStorage || localForage).getItem('OnoriStorage') || '{}';
		const sortListData = JSON.parse(sortListDataRaw);
		sortListData[key] = value;
		(localStorage || localForage).setItem('OnoriStorage', JSON.stringify(sortListData));
	},
};



window.addEventListener("message", (e) => {
	let payload = JSON.parse(e.data);
	
	if(!payload._id){
		return;
	}
	let response = {
		_id: payload._id,
	};
	
	switch(payload.action) {
		case 'set':
			localStorageAdapter.set(payload.key, payload.value);
			response.data = true;
			break;
			
		case 'get':
			response.data = localStorageAdapter.get(payload.key);
			break;
		
		case 'remove':
			localStorageAdapter.set(payload.key, null);
			response.data = true;
			break;
	}
	
	
	let parent = window.parent;
	parent.postMessage(JSON.stringify(response), "*");
});