@amedia/user

amedia-user-js

Its goal is to simplify the complexity of logging in and getting access to user related data.

Usage

Add this project to yours

> npm i @amedia/amedia-user

Setup a listener for the information you need

import {subscribeToUserUpdates} from '@amedia/amedia-user';

subscribeToUserUpdates(['name', 'email'], (attributes) => {
    console.log(attributes);
});

Receiving updates

This callback will be called whenever where are any changes to the properties you have requested, so be prepared to rerender.

Also, your requested properties might not arrive all at once. This callback will be called whenever we get data in from the various services.

Performance

This app aims to be able to deliver a lot of data really fast. Still, we might need to call several services in order to get what you need. We do try to cache whenever this makes sense, please don't ask for data you don't need.

Behind the scenes

There are a few techniques used to avoid overfetching and fetching multiple times when once would do.

Event-based actions

Much like node-userdata-browser/userdata-client did, we utilize events to message that data is being requested. This allowed us to decouple your request from the particular instance that will serve it. This allows us to have this packed loaded by multiple different components across the page, and only process the requests one place. In addition, if the component that's currently processing requests should be unloaded for whatever reason, one of the other instances will automatically take over.

Request deduping

Since we now process from a single instance of the package it's easy to avoid fetching the same resource multiple times.

Caching

Tha app has got few caching mechanisms, through local storage and indexeddb