React on Artur Rios Lab

Mosaic: A Second Brain App

Wed, 21 Oct 2026 09:00:00 +0000

An app that wants to be your second brain.

Features

Create and organize notes in Markdown
Calendar
To do list
Kanban board
Pomodoro sessions
Mermaid diagrams
Draw diagrams

Inspiration

This app wants to combine features from these apps:

Platforms

Android
Linux
Web
Windows

Technology stack

Two of the features decide most of the stack before anything else is weighed. Excalidraw is published as a React component, and Mermaid is a JavaScript library. Any stack that does not run JavaScript in a web view has to embed one to get them, so the cheapest path is to make the whole app a web app and wrap it for each platform. The suggestion below follows that path.

Angular, React or Flutter? How They Compare and How to Choose

Tue, 20 Oct 2026 18:00:00 +0000

“Angular or React?” is one of the most common questions in front-end development, and “or Flutter?” is now often added to it. The question sounds like a choice between three brands of the same product. It is not. Angular is a complete framework for web applications; React is a library for turning state into UI, which needs a framework around it to make an application; Flutter is a toolkit for mobile, desktop, web and embedded apps that does not use the browser’s HTML at all, but draws every pixel itself. Each has been described in detail in this section: What Is Angular?, What Is React? and What Is Flutter?. This article puts them side by side and ends with a guide to choosing.

What Is React? Components, Rendering and the Library Behind Modern Interfaces

Tue, 20 Oct 2026 18:00:00 +0000

React is a JavaScript library for building user interfaces out of components: small functions that describe what a piece of the screen should look like for a given state. You never tell React how to change the page; you describe what it should be now, and React works out the smallest set of changes that gets the screen there. The idea met a cool reception when Facebook released React in 2013; today React is the most used library of its kind. In Stack Overflow’s 2026 Developer Survey, 42 percent of respondents said they had used it, second among web frameworks and technologies only to Node.js.¹