# Felipe Gustavo's Blog Essays on React, JavaScript, state management, reactivity, UI engineering, and product-minded frontend architecture. - Author: Felipe Gustavo - URL: https://www.felgus.dev/ - Updated at: 2026-01-14 ## Key pages - Home: https://www.felgus.dev/ - Blog: https://www.felgus.dev/blog - Consulting: https://www.felgus.dev/consulting - Categories: https://www.felgus.dev/category - Series: https://www.felgus.dev/series ## Categories - react: https://www.felgus.dev/category/react (18 posts) - javascript: https://www.felgus.dev/category/javascript (10 posts) - reactivity: https://www.felgus.dev/category/reactivity (8 posts) - frontend: https://www.felgus.dev/category/frontend (2 posts) - state-management: https://www.felgus.dev/category/state-management (2 posts) - web: https://www.felgus.dev/category/web (2 posts) - next.js: https://www.felgus.dev/category/next.js (1 posts) - redux: https://www.felgus.dev/category/redux (1 posts) ## Series - reactivity-react: https://www.felgus.dev/series/reactivity-react (6 posts) - ui-engineering: https://www.felgus.dev/series/ui-engineering (1 posts) ## Posts ### My React ecosystem stack in 2026 - HTML: https://www.felgus.dev/blog/react-stack-2026 - Markdown: https://www.felgus.dev/blog/react-stack-2026/raw - Published: 2026-01-14 - Categories: react Stabilization as a feature ```yaml --- title: My React ecosystem stack in 2026 publishedAt: '2026-01-14' summary: Stabilization as a feature categories: react --- ``` ### Ten Frontend Commandments - HTML: https://www.felgus.dev/blog/ten-frontend-commandments - Markdown: https://www.felgus.dev/blog/ten-frontend-commandments/raw - Published: 2025-12-04 - Categories: frontend yes, it's a reference ```yaml --- title: Ten Frontend Commandments publishedAt: '2025-12-04' summary: yes, it's a reference categories: frontend --- ``` ### The JavaScript fatigue is not real anymore - HTML: https://www.felgus.dev/blog/javascript-fatigue - Markdown: https://www.felgus.dev/blog/javascript-fatigue/raw - Published: 2025-11-21 - Categories: web, frontend or never was ```yaml --- title: The JavaScript fatigue is not real anymore publishedAt: '2025-11-21' summary: or never was categories: web, frontend --- ``` ### Bluesky: The problem is not just technical - HTML: https://www.felgus.dev/blog/bluesky-problem - Markdown: https://www.felgus.dev/blog/bluesky-problem/raw - Published: 2025-10-01 - Categories: web The challenges of open networks ```yaml --- title: 'Bluesky: The problem is not just technical' publishedAt: '2025-10-01' summary: The challenges of open networks categories: web --- ``` ### The present and the future of SPAs in React - HTML: https://www.felgus.dev/blog/future-spa - Markdown: https://www.felgus.dev/blog/future-spa/raw - Published: 2025-07-22 - Categories: react Single page applications for the win ```yaml --- title: The present and the future of SPAs in React publishedAt: '2025-07-22' summary: Single page applications for the win categories: react --- ``` ### UI Engineering: It's all pixels - HTML: https://www.felgus.dev/blog/ui-enginnering-paint - Markdown: https://www.felgus.dev/blog/ui-enginnering-paint/raw - Published: 2025-06-27 - Categories: javascript The paint process ```yaml --- title: 'UI Engineering: It''s all pixels' publishedAt: '2025-06-27' summary: The paint process categories: javascript --- ``` ### The dynamics of event loop manipulation in JavaScript - HTML: https://www.felgus.dev/blog/js-event-loop-dynamics - Markdown: https://www.felgus.dev/blog/js-event-loop-dynamics/raw - Published: 2025-04-03 - Categories: react, next.js, javascript Exploring the runtime internals ```yaml --- title: The dynamics of event loop manipulation in JavaScript publishedAt: '2025-04-03' summary: Exploring the runtime internals categories: react, next.js, javascript --- ``` ### React Suspense Gate and how to be right and wrong at the same time - HTML: https://www.felgus.dev/blog/suspense-gate - Markdown: https://www.felgus.dev/blog/suspense-gate/raw - Published: 2025-03-28 - Categories: react What we can learn with it? ```yaml --- title: React Suspense Gate and how to be right and wrong at the same time publishedAt: '2025-03-28' summary: What we can learn with it? categories: react --- ``` ### Common React libraries architecture - HTML: https://www.felgus.dev/blog/common-react-lib-architecture - Markdown: https://www.felgus.dev/blog/common-react-lib-architecture/raw - Published: 2025-03-14 - Categories: react The ecosystem under the hood ```yaml --- title: Common React libraries architecture publishedAt: '2025-03-14' summary: The ecosystem under the hood categories: react --- ``` ### The data should just flow - HTML: https://www.felgus.dev/blog/data-should-flow - Markdown: https://www.felgus.dev/blog/data-should-flow/raw - Published: 2025-03-10 - Categories: react, reactivity TLDR: just use React compiler ```yaml --- title: The data should just flow publishedAt: '2025-03-10' summary: 'TLDR: just use React compiler' categories: react, reactivity --- ``` ### Signals in React? Not a good idea - HTML: https://www.felgus.dev/blog/signals-in-react - Markdown: https://www.felgus.dev/blog/signals-in-react/raw - Published: 2025-02-28 - Categories: react, reactivity The problem of merging two opposite models ```yaml --- title: Signals in React? Not a good idea publishedAt: '2025-02-28' summary: The problem of merging two opposite models categories: react, reactivity --- ``` ### Create React App Post Mortem - HTML: https://www.felgus.dev/blog/cra-post-mortem - Markdown: https://www.felgus.dev/blog/cra-post-mortem/raw - Published: 2025-02-20 - Categories: react Press F to pay respects ```yaml --- title: Create React App Post Mortem publishedAt: '2025-02-20' summary: Press F to pay respects categories: react --- ``` ### React as a UI language - HTML: https://www.felgus.dev/blog/react-as-a-ui-language - Markdown: https://www.felgus.dev/blog/react-as-a-ui-language/raw - Published: 2025-02-14 - Categories: react What is React? ```yaml --- title: React as a UI language publishedAt: '2025-02-14' summary: What is React? categories: react --- ``` ### React may be missing the point of React - HTML: https://www.felgus.dev/blog/react-issues - Markdown: https://www.felgus.dev/blog/react-issues/raw - Published: 2025-02-11 - Categories: react or the two biggest problems with it today ```yaml --- title: React may be missing the point of React publishedAt: '2025-02-11' summary: or the two biggest problems with it today categories: react --- ``` ### My React ecosystem stack in 2025 - HTML: https://www.felgus.dev/blog/react-stack-2025 - Markdown: https://www.felgus.dev/blog/react-stack-2025/raw - Published: 2025-02-04 - Categories: react The tools I used for production apps ```yaml --- title: My React ecosystem stack in 2025 publishedAt: '2025-02-04' summary: The tools I used for production apps categories: react --- ``` ### Why Zustand suceed in the React state management war? - HTML: https://www.felgus.dev/blog/zustand-success - Markdown: https://www.felgus.dev/blog/zustand-success/raw - Published: 2025-01-17 - Categories: react, state-management, javascript simplicity and minimalism ```yaml --- title: Why Zustand suceed in the React state management war? publishedAt: '2025-01-17' summary: simplicity and minimalism categories: react, state-management, javascript --- ``` ### The problem with usePrevious and similar time oriented hooks - HTML: https://www.felgus.dev/blog/use-previous-hook - Markdown: https://www.felgus.dev/blog/use-previous-hook/raw - Published: 2024-12-06 - Categories: react, reactivity, javascript we don't have time travel ```yaml --- title: The problem with usePrevious and similar time oriented hooks publishedAt: '2024-12-06' summary: we don't have time travel categories: react, reactivity, javascript --- ``` ### Reasoning about the useEffect wrong usage - HTML: https://www.felgus.dev/blog/useeffect-wrong-usage - Markdown: https://www.felgus.dev/blog/useeffect-wrong-usage/raw - Published: 2024-12-06 - Categories: react, reactivity, javascript or the only real problem with useEffect hook ```yaml --- title: Reasoning about the useEffect wrong usage publishedAt: '2024-12-06' summary: or the only real problem with useEffect hook categories: react, reactivity, javascript --- ``` ### Dynamic derivations and its way to kill useEffect - HTML: https://www.felgus.dev/blog/dynamic-derivations - Markdown: https://www.felgus.dev/blog/dynamic-derivations/raw - Published: 2024-11-25 - Categories: react, reactivity, javascript ```yaml --- title: Dynamic derivations and its way to kill useEffect publishedAt: '2024-11-25' summary: '' categories: react, reactivity, javascript --- ``` ### Lifecycle doesn't exist in React with hooks - HTML: https://www.felgus.dev/blog/life-cycles-in-react-hooks - Markdown: https://www.felgus.dev/blog/life-cycles-in-react-hooks/raw - Published: 2024-11-11 - Categories: react, reactivity, javascript About common mistakes and misconceptions ```yaml --- title: Lifecycle doesn't exist in React with hooks publishedAt: '2024-11-11' summary: About common mistakes and misconceptions categories: react, reactivity, javascript --- ``` ### Async derivations in React - HTML: https://www.felgus.dev/blog/async-derivations - Markdown: https://www.felgus.dev/blog/async-derivations/raw - Published: 2024-11-04 - Categories: react, reactivity, javascript Until React 19, it did not a primitive way of solving async derivations, now it's solved. ```yaml --- title: Async derivations in React publishedAt: '2024-11-04' summary: >- Until React 19, it did not a primitive way of solving async derivations, now it's solved. categories: react, reactivity, javascript --- ``` ### The complicated relation between React and derivations - HTML: https://www.felgus.dev/blog/react-relation-to-derivation - Markdown: https://www.felgus.dev/blog/react-relation-to-derivation/raw - Published: 2024-10-29 - Categories: react, reactivity, javascript ```yaml --- title: The complicated relation between React and derivations publishedAt: '2024-10-29' summary: '' categories: react, reactivity, javascript --- ``` ### Understanding how the redux data flow really works - HTML: https://www.felgus.dev/blog/understanding-redux - Markdown: https://www.felgus.dev/blog/understanding-redux/raw - Published: 2021-08-19 - Categories: redux, javascript, state-management Going deep in the core of the most prolific state management library. ```yaml --- title: Understanding how the redux data flow really works publishedAt: '2021-08-19' summary: Going deep in the core of the most prolific state management library. categories: redux, javascript, state-management --- ```