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publicstorage

v0.0.17

Published

A utility class to expose a public (cross-domain) shared memory

Downloads

50

Readme

publicstorage

A NPM package that will allow pages from cross-domains to share persistent data.

The publicstorage acts as a kind of localstorage (or sessionstorage) that is publicly available from any domain. This allows for web pages from different domains to share data really easily.

Examples of use

Setting and getting 'public' data

Getting or setting data is an asynchronous job - so that it never blocks the UI. Everything is wrapped in Promise :

Set key/value

publicstorage.set("test", "my value here ").then(v => {
	console.log("I set value test=" + v);
});

Get value by key

publicstorage.get("test").then(v => {
	console.log("I got value test=" + v);
});

Data can also be structured

publicstorage.set("test", {my : "value", is:"here"}).then(v => {
	console.log("I set value test=" + v);
});

publicstorage.get("test").then(v => {
	console.log("I got value test=" + JSON.stringify(v));
});

Initialization

publicstorage cannot work before the body is available - though it is only made available when the page is fully loaded - that means after the onLoad event has been triggered. That's why the package export is a Promise :

var publicstoragePromise = require('publicstorage');

publicstoragePromise.then(publicstorage => {
	// your code here - use the publicstorage from there !
});

Security warning

This implementation aims at sharing data between domains. This means there is no control on who reads or writes the data. Do not use this means as-is with confidential or sensitive data! In case you need to ensure only a controled set of domains can access the data, you will need to fork the code and modify the shared-iframe.html component.