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week7_day1's Introduction

week7_day1

React | create-react-app

React | Intro, JSX and Elements

React | Components and Props

Main points: React

  • Librería de Javascript para interfaces de usuario en formato Single Page Application.
  • La transmisión de información se realiza a través de props en base a un single way data flow.
  • El paquete global create-react-app cubre todos los requerimientos para comenzar un proyecto de React.

Main points: Componentes

Existen dos tipos de componentes en React:

  • Componentes funcionales:
    • Funciones de Javascript
    • Stateless
    • Retornan JSX
    • Disponen de las propiedades en el parámetro props
  • Componentes de clase:
    • Clases de Javascript
    • Stateful
    • Retornan JSX a través de su método .render()
    • Disponen de las propiedades en this.props

El desarrollo de componentes supone:

  • Importar React y, en caso de componentes de clase, { Component }
  • Declaración del componente.
  • Exportación del componente (por defecto o nominal).

Main points: JSX

  • Javascript eXtension que produce React elements para ser renderizados en el DOM.
  • Los elementos de JSX son manejados como expresiones de Javascript.
  • Todas las etiquetas disponen de apertura y cierre.
  • La sintaxis de algunos atributos se ve alterada (class -> className).
  • No es posible retornar elementos adyacentes.
  • Es posible interpolar JS en elementos de JSX entre llaves.
  • Para interpolar el valor de un atributo es necesario omitir las comillas del mismo.

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