Preparación Entrevista React 19

Prepárate para tu Entrevista Senior de React

Dos pistas: aprende las nuevas funciones de React 19 con lecciones interactivas, y repasa más de 400 preguntas clásicas de entrevistas que los reclutadores realmente hacen.

React 1915 lecciones407 preguntas

Pista 1 · Funciones de React 19

Lecciones prácticas con editor Monaco y vista previa en vivo. Domina use(), useActionState, useOptimistic, useFormStatus, <Activity>, y más.

React 19: La Revolución Asíncrona

Un curso intensivo sobre las nuevas primitivas diseñadas para velocidad, concurrencia y gestión de estado sin esfuerzo.

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1. El Hook use()

Desenvuelve promesas directamente en render. React suspende automáticamente el componente hasta que los datos estén listos.

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2. Hooks de Acción

Automatiza ciclos de vida de formularios. useActionState rastrea estado pendiente y errores automáticamente.

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3. <Activity>

Marca árboles como ocultos para preservar posición de scroll y estado sin consumo activo de recursos.

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4. useEffectEvent

Extrae lógica no reactiva. Asegura que tu efecto solo se re-ejecute cuando dependencias específicas cambien.

Pista 2 · Preguntas Clásicas de Entrevista

+400 preguntas y respuestas recopiladas de la práctica real de entrevistas. Filtra por categoría, busca por palabra clave, y marca tu progreso con repetición espaciada.

React esencial78 preguntas

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Prepárate para tu Entrevista Senior de React

Pista 1 · Funciones de React 19

React 19: La Revolución Asíncrona

1. El Hook use()

2. Hooks de Acción

3. <Activity>

4. useEffectEvent

La muerte de useEffect para obtener datos

Formularios sin sufrimiento (useActionState)

Comunicación entre componentes (useFormStatus)

La UI optimista (useOptimistic)

El React Compiler (adiós a useMemo)

La muerte de forwardRef

Metadata nativa (adiós a react-helmet)

Context Providers más limpios

Limpieza en Callback Refs

La arquitectura (Client vs Server)

Interoperabilidad con Web Components

Carga nativa de assets (estilos y scripts)

La corrección del "Error de Hidratación"

Configuración inicial de useDeferredValue

APIs de precarga (preload, preinit)

Pista 2 · Preguntas Clásicas de Entrevista

What is React?

What is the history behind React evolution?

What are the major features of React?

What is JSX?

What is the difference between an Element and a Component?

How to create components in React?

When to use a Class Component over a Function Component?

What are Pure Components?

What is state in React?

What are props in React?

What is the difference between state and props?

What is the difference between HTML and React event handling?

What are synthetic events in React?

What are inline conditional expressions?

What is "key" prop and what is the benefit of using it in arrays of elements?

What is Virtual DOM?

How Virtual DOM works?

What is the difference between Shadow DOM and Virtual DOM?

What is React Fiber?

What is the main goal of React Fiber?

What are controlled components?

What are uncontrolled components?

What is the difference between createElement and cloneElement?

What is Lifting State Up in React?

What are Higher-Order Components?

What is children prop?

How to write comments in React?

What is reconciliation?

Does the lazy function support named exports?

Why React uses `className` over `class` attribute?

What are fragments?

Why fragments are better than container divs?

What are portals in React?

What are stateless components?

What are stateful components?

How to apply validation on props in React?

What are the advantages of React?

What are the limitations of React?

What are the recommended ways for static type checking?

What is the use of `react-dom` package?

What is ReactDOMServer?

How to use innerHTML in React?

How to use styles in React?

How events are different in React?

What is the impact of indexes as keys?

How do you conditionally render components?

Why we need to be careful when spreading props on DOM elements?

How do you memoize a component?

How you implement Server Side Rendering or SSR?

How to enable production mode in React?

Do Hooks replace render props and higher order components?

What is a switching component?

What are React Mixins?

What are the Pointer Events supported in React?

Why should component names start with capital letter?

Are custom DOM attributes supported in React v16?

How to loop inside JSX?