eventstore VS Chart.js

Since I already had a Postgres database running, I decided to use EventStore rather than installing and babysitting EventStoreDB. To initialize the database and tables, I ran mix event_store.init and mix event_store.create.

My goal is to use LiveView to update a price chart as trades are executed by the system. A LiveView process is a lot like a GenServer, with a bespoke process for each client, executing handle_* functions as the client does things. The first step to real-time chart updates is to trigger one of these handler functions in my LiveView controller when a trade is executed. I'm using Commanded's own EventStore library to dispatch and store my events, so their documentation is the place to start.

ChartsJS for inspiring me with the pie chart.

Most of frontend libraries are made with Vanilla JS. An example of library that you might frequently use is "Chart.js". But React is not compatible with Chart.js so here it comes "React-chartjs-2" A wrapper library to work with Chart.js in React ecosystem. Oh you want to use "three.js" for some cool 3D? you will need "React-three/fiber". In my case, I need to implement "telegram-web-app", not so fast, I have to create my own wrapper to be able to use it.

Chart.js

Chart.js is a free, open-source JavaScript library for data visualization, which supports eight chart types: bar, line, area, pie, bubble, radar, polar and scatter. It's licensed under the permissive MIT license and is renowned for being flexible, lightweight, easy to use and extendible.

They are images so it could be any number of things, datawrapper, charts.js, d3.js to name a few options.

Charts.js for creating diagrams

Connie Leung wrote a tutorial to demonstrate how these new hooks work, integrating an Angular app with the Chart.js library: "DOM reading and writing with new lifecycle hooks in Angular"

Thanks to all who participated in our 2023 Self-Host User Survey! Below is a link to the results, which we've visualized using Chart.js.

Chart.js