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Two states. One event. No booleans. No conditionals. 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You can use state machines to:",{"_37":1598,"_39":1599},[],{"_41":42,"_43":1600,"_45":1253,"_47":1601,"_49":1602,"_62":1607,"_60":61},"eR1fhV5r",{},[1603],{"_41":52,"_53":1604,"_56":1605,"_47":1606,"_60":61},[379],[448],{},"And when you pair XState + React + TypeScript, you unlock type-safe, testable UI logic that scales.",{"_41":163,"_43":1609,"_45":1253,"_47":1610,"_49":1611,"_62":1612,"_60":61},"vph2YBdF",{"_127":166},[],"🛠️ Why This Matters",{"_37":1614,"_39":1634},[1615,1627],{"_37":1616,"_39":1617},[],{"_41":42,"_43":1618,"_45":1253,"_47":1619,"_49":1620,"_62":1626,"_60":61},"xZimMM5q",{},[1621],{"_41":52,"_53":1622,"_56":1623,"_47":1625,"_60":61},[1524],[1624],61,{},"In the next issue, we’ll break down the three building blocks of any state machine — and how to spot them in your own components.",{"_37":1628,"_39":1629},[],{"_41":42,"_43":1630,"_45":1253,"_47":1631,"_49":1632,"_62":1633,"_60":61},"bVgpTHna",{},[],"You’ll learn how to go from messy state to modeled behavior in minutes.",{"_41":163,"_43":1635,"_45":1253,"_47":1636,"_49":1637,"_62":1638,"_60":61},"bxuzThYA",{"_127":166},[],"⏭️ Coming Up Next: States, Events, and Transitions",{"_37":1640,"_39":1678},[1641,1648,1655,1667],{"_37":1642,"_39":1643},[],{"_41":42,"_43":1644,"_45":1253,"_47":1645,"_49":1646,"_62":1647,"_60":61},"JH-6Rryd",{},[],"Pick a small UI interaction in your app — a toggle, modal, or dropdown — and try modeling it as a state machine.",{"_37":1649,"_39":1650},[],{"_41":42,"_43":1651,"_45":1253,"_47":1652,"_49":1653,"_62":1654,"_60":61},"scvfIDjN",{},[],"Just one.",{"_37":1656,"_39":1657},[],{"_41":42,"_43":1658,"_45":1253,"_47":1659,"_49":1660,"_62":1666,"_60":61},"p48_gOts",{},[1661],{"_41":117,"_53":1662,"_56":1663,"_47":1665,"_60":61},[159],[1664],51,{},"Then ask yourself: was this easier to reason about?",{"_37":1668,"_39":1669},[],{"_41":42,"_43":1670,"_45":1253,"_47":1671,"_49":1672,"_62":1677,"_60":61},"3JDOfXV5",{},[1673],{"_41":52,"_53":1674,"_56":1675,"_47":1676,"_60":61},[55],[188],{},"Hit reply and let me know how it went — or tag me on Twitter/X. I’ll feature a few community examples in future issues.",{"_41":163,"_43":1679,"_45":1253,"_47":1680,"_49":1681,"_62":1682,"_60":61},"gWgHnWOx",{"_127":166},[],"💡 Try This",{"_37":1684,"_39":1685},[],{"_41":42,"_43":1686,"_45":1253,"_47":1687,"_49":1688,"_62":61,"_60":61},"AffwMmaJ",{},[],{"_37":1690,"_39":1691},[],{"_41":42,"_43":1692,"_45":1253,"_47":1693,"_49":1694,"_62":1695,"_60":61},"V5cHfg-a",{},[],"Thanks for reading,\nHoracio",[537],"/content/you-are-writing-ui-state-wrong","2025-03-31T21:51:13.698Z","2025-04-01T04:44:31.918Z",{"_393":1701,"_549":351},"You are Writing UI State Wrong",{},{"_552":1253,"_555":1704},"1743457873698",{"_43":1706,"_565":537,"_540":1707,"_534":-5,"_567":-5,"_568":-5,"_569":-5,"_570":-5},"hm://z6MkhBiheioCs7btwVLUcnSCcFPdhTGGHSHpR4SHTyAobUUp/content/you-are-writing-ui-state-wrong",[34,562],1776802187102,[936,1706,-5,8],"[\"ENTITY\",\"hm://z6MkhBiheioCs7btwVLUcnSCcFPdhTGGHSHpR4SHTyAobUUp/content/you-are-writing-ui-state-wrong\",null,false]",{"_579":1712,"_934":1720,"_937":1722},{"_581":1713,"_920":305,"_921":1719,"_923":-5,"_924":55,"_925":55,"_926":55,"_927":-5,"_928":-5,"_929":8,"_930":931,"_932":933},{"_41":536,"_43":1714,"_546":1716},{"_534":1094,"_565":537,"_43":1107,"_540":1715,"_567":-5,"_568":-5,"_569":-5,"_570":-5},[],{"_393":1099,"_1100":1101,"_1717":-5,"_1718":-5},"icon","summary",1776802187117,[1721,537],"ACCOUNT","[\"ACCOUNT\",\"z6MkhBiheioCs7btwVLUcnSCcFPdhTGGHSHpR4SHTyAobUUp\"]","ssrContentHTML","

Por qué las máquinas de estados hacen que la lógica de UI sea más simple, segura y mantenible.

🤯 El espiral de la lógica en la UI

Seamos sinceros: probablemente la lógica de estado en tu componente de React empezó siendo simple.

Un par de booleanos. Tal vez un useEffect. Lo justo para que funcione.

Pero luego las cosas se complicaron:

Agregaste un estado de carga.
Después, un estado de error.
Luego, un flujo de reintento.
Y finalmente, un caso raro donde hay carga y error al mismo tiempo.

Ahora estás manejando isLoading, hasError, isSubmitting, showModal, y una maraña de if/else, y aún así no estás seguro si cubriste todos los casos.

¿Te suena familiar?

🧠 Las UIs no son solo estados — son comportamientos

A menudo tratamos el estado de UI como una estructura plana de booleanos o enums.

Pero en realidad, tu UI es un proceso. Una secuencia. Un usuario hace clic, algo sucede, y la UI responde.

Eso no es solo estado. Es estado a través del tiempo — y eso es exactamente lo que una máquina de estados modela.

✅ La solución: modela comportamientos, no solo estados

¿Qué pasaría si, en vez de conectar un montón de banderas y condiciones, modelaras la lógica de tu UI como una máquina de estados?

Con una máquina de estados, puedes:

Definir todos los estados posibles desde el principio
Describir solo las transiciones válidas
Eliminar estados imposibles o contradictorios
Tener un mapa visual de tu lógica — gratis

Veamos un ejemplo simple.

🧪 Ejemplo: Toggle con XState

import { createMachine } from 'xstate';\n\nconst toggleMachine = createMachine({\n  id: 'toggle',\n  initial: 'inactive',\n  states: {\n    inactive: {\n      on: { TOGGLE: 'active' },\n    },\n    active: {\n      on: { TOGGLE: 'inactive' },\n    },\n  },\n});

Eso es todo.

Una máquina. Dos estados. Un evento. Sin booleanos. Sin condicionales. Sin useState.

Simple, expresivo y con tipado fuerte.

🔍 Visualízalo

$\"Diagrama$ Diagrama de La Maquina de estado en Stately.ai

Así es como realmente luce esa máquina:

Button

Herramientas como Stately.ai te permiten ver tus máquinas como diagramas de flujo — para que tú y tu equipo entiendan instantáneamente lo que está pasando.

🛠️ ¿Por qué importa esto?

Esto no es solo para toggles. Puedes usar máquinas de estados para:

Simplificar formularios multistep y asistentes
Modelar modales, menús desplegables o flujos de onboarding
Eliminar estados inconsistentes en la UI
Reemplazar lógica useEffect con transiciones declarativas

Y cuando combinas XState + React + TypeScript, desbloqueas una arquitectura de UI segura, testeable y escalable.

⏭️ Próximo tema: Estados, Eventos y Transiciones

En el siguiente número, vamos a desglosar los tres bloques fundamentales de cualquier máquina de estados — y cómo identificarlos en tus propios componentes.

Vas a aprender cómo pasar de un estado caótico a un comportamiento modelado en minutos.

💡 Intenta esto

Elige una interacción pequeña en tu UI — un toggle, modal o dropdown — e intenta modelarla como una máquina de estados.

Solo una.

Y luego pregúntate: ¿fue más fácil razonar sobre esto?

Responde este correo y cuéntame cómo te fue — o etiquéteme en Twitter/X. Voy a destacar algunos ejemplos interesantes en futuros envíos.

Gracias por leer,\nHoracio

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