Tweet

@s

@laurosilvacom

More from @matiasfha

Matías Hernández Arellano

@matiasfha

6 May

State management in a web app can be a real PITA and confusing topic to tackle down.
The way that you handle the state is something you should take care of from the very beginning.

Starting for: what is state and what type of state do I have?

The application state can be split into at least two types :

🕙 Server state: asynchronous and doesn't really belongs to the app, remotely persisted, potentially out-of-date.

📺 UI state: synchronous, easily accessible, derived from user interaction. Complete ownership

Since the nature of the state is different in each case we should choose the correct tool and "architecture" to manage it.

There is a ton of solutions out there and I think that all of them are good one when used correctly.

Like Redux, RTK, zustand, Mobx, etc

Read 17 tweets

Matías Hernández Arellano

@matiasfha

4 May

Just in case you are falling into a dark and deep TS rabbit hole with react-hooks-form.
If you want to have custom components that do something based on the `errors` that comes out of `useForm`.
That error object type is DeepMap<TFieldValue, FieldErrors>.

For some reason that I'm not in the mood to discuss xD I wanted to pass that errors down to a "generic" Input and friends component to show some error state.
But TS didn't like it. It said that I wasn't able to access `errors?.[props.name]` 😅

So I tried to bend the type system and I didn't actually fully accomplish that goal and the solution I had was really hacky and disgusting 🤮. And after digging in the code I had a bulb moment 💡

Read 7 tweets

Matías Hernández Arellano

@matiasfha

4 May

Do you know the state reducer pattern in React?

Is a design pattern that enable the user of a component to manipulate or manage the inner state of it by using a reducer pattern.

When creating components for an UI library for your project you have to take some decisions and assumptions about the way it work or be used.
But adding so many opinions to it can decrease the generalization of your component and the usability of the same.

@kentcdodds

The State Reducer Pattern (an idea an implementation by @kentcdodds for downshift) is a form of Inversion of Control where your component enable the user of it to control internal behavior through the API.

Read 7 tweets

Matías Hernández Arellano

@matiasfha

24 Apr

When writing React.

How do you decide to use useReducer instead of useState?

In general you can always use reducers, technically useState is a simplified version of useReducer.

But then, Why use useReducer?

Although it looks more complex, using it gives you great advantages.

The first advantage is encapsulation and abstraction.
useReducer uses a reducer function that lives outside of the component and is not affected by re-renders. It also simplifies your code by ISOLATING the state logic in a function.

Another advantage is that you can handle more complex states with different update logics and in an "atomic" way.
The reducer function receives the current state and an object that we commonly call an action.
Depending on the action, the function will return a new state.

Read 9 tweets

Matías Hernández Arellano

@matiasfha

24 Apr

Al escribir componentes React.
¿Cuando decides usar useReducer en vez de useState?

En general puedes usar reducers siempre, técnicamente useState es una versión simplificada de useReducer.

¿Por que usar useReducer?
Si bien se ve más complejo usarlo te da grandes ventajas

La primera ventaja es encapsulacion y abstracción.
useReducer utiliza una función reducer que vive fuera del componente no siendo afectada por los re-renders y además simplifica tu código por que AISLA la lógica de estado en una función.

Otra ventaja es que puedes manejar estados más complejos con lógicas de actualización diferente y de manera "atómica".
La función reducer recibe el estado actual y un objeto que comúnmente llamamos acción.
Dependiendo de la acción la función retornará un nuevo estado.

Read 12 tweets

Matías Hernández Arellano

@matiasfha

22 Apr

@eggheadio

Becoming an @eggheadio instructor is for sure the biggest achievement in my career as dev.
I was just talking about this very same topic with @RealChrisSean and now I see that I been featured

egghead.io/blog/matias-he…

@cafe_contech

Becoming an instructor gave so much confident and encouragement to move forward that I now have two podcasts @cafe_contech and @ControlRemoto7 had the honor of became and @Auth0Ambassador and @MediaDevs, write for @freeCodeCamp and @freecodecampES...

@draftdev

Been accepted on @draftdev and been able to write for other publications (not yet published) and also land a pretty good job at @Clevertech.

Read 6 tweets

Share this page!

Matías Hernández Arellano

Try unrolling a thread yourself!

More from @matiasfha

Matías Hernández Arellano

Matías Hernández Arellano

Matías Hernández Arellano

Matías Hernández Arellano

Matías Hernández Arellano

Matías Hernández Arellano

Did Thread Reader help you today?

Like this author's thread?