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Desarrollo FrontEnd con JavaScript - S03 (I)

Avatar for Gustavo Leon Gustavo Leon
November 17, 2013
Programming
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63

Desarrollo FrontEnd con JavaScript - S03 (I)

S03 - Peticiones asíncronas con XMLHttpRequest:
- Objeto XHR
- JSON

Avatar for Gustavo Leon

Gustavo Leon

November 17, 2013
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Transcript

  1. Desarrollo FrontEnd con JavaScript s03 – Peticiones asíncronas con XMLHttpRequest

  2. Objeto XHR

  3. Enviando peticiones con XHR

  4. XHR – Propiedades • readyState • 0: No iniciado •

    1: Iniciado • 2: Enviado • 3: En proceso • 4: Completo • status • 200: OK • 304: Not Modified • 403: Forbidden • 404: Not Found • 500: Internal Error

  5. XHR – Usando FormData

  6. JSON

  7. JSON – Sintaxis • Similar a un objeto plano. •

    Los keys van entre comillas. • Los valores pueden ser números, cadenas, booleans, arrays u otros objetos.

  8. JSON – Métodos • parse • stringify