solutaaliquid/src/PrivateProperty.js

common utils for javascript. Utils to get the global scope (browser, webworker & co.). Customizable string escaper. Utilitize for objects. Extension at base javascript api (usefull extention like String.hashcode()).

const PRIVATE_PROPERTIES = new WeakMap();
export const privateStore = (obj) => {
	if(PRIVATE_PROPERTIES.has(obj))
		return PRIVATE_PROPERTIES.get(obj);
	
	const data = {};
	PRIVATE_PROPERTIES.set(obj, data);
	return data;
};

export const privateProperty = function(obj, name, value) {
	const data = privateStore(obj);
	if(arguments.length === 1)
		return data;
	else if(arguments.length === 2)
		return data[name];
	else if(arguments.length === 3)
		data[name] = value;
	else
		throw new Error("Not allowed size of arguments!");
};

export const privatePropertyAccessor = (varname) => {
	return function(self, value){
		if(arguments.length == 2)
			privateProperty(self, varname, value);
		else
			return privateProperty(self, varname);
	};
};

export default {privateProperty, privatePropertyAccessor, privateStore};