September 2024
Intermediate to advanced
346 pages
9h 51m
Spanish
Content preview from Desarrollo Web con Node y Express, 2ª Edición
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Capítulo 16. Aplicaciones de una sola página
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El término aplicación de una sola página (SPA) es algo así como un término equivocado, o al menos confunde dos significados de la palabra "página". Las SPA, desde la perspectiva del usuario, pueden (y suelen) seguir pareciendo tener páginas diferentes: la página de inicio, la página de Vacaciones, la página Acerca de, etc. De hecho, podrías crear una aplicación tradicional renderizada del lado del servidor y una SPA que fueran indistinguibles para el usuario.
La "página única" tiene más que ver con dónde y cómo se construye el HTML que con la experiencia del usuario. En una SPA, el servidor entrega un único paquete HTML cuando el usuario carga la aplicación por primera vez,1 y cualquier cambio en la interfaz de usuario (que puede aparecer como páginas diferentes para el usuario) es el resultado de la manipulación del DOM por parte de JavaScript en respuesta a la actividad del usuario o a eventos de la red.
Las SPA siguen necesitando comunicarse frecuentemente con el servidor, pero el HTML normalmente sólo se envía como parte de esa primera petición. Después de eso, sólo se transfieren datos JSON y activos estáticos entre el cliente y el servidor.
Entender la razón de este enfoque ahora dominante en el desarrollo de aplicaciones web requiere un poco de historia....
Breve historia del desarrollo de aplicaciones web
La ...
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