September 2024
Intermediate to advanced
706 pages
22h 41m
Spanish
Content preview from JavaScript: La Guía Definitiva, 7ª Edición
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Capítulo 15. JavaScript en los navegadores web
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El lenguaje JavaScript se creó en 1994 con el propósito expreso de permitir un comportamiento dinámico en los documentos mostrados por los navegadores web. El lenguaje ha evolucionado significativamente desde entonces, y al mismo tiempo, el alcance y las capacidades de la plataforma web han crecido explosivamente. Hoy en día, los programadores de JavaScript pueden pensar en la web como una plataforma completa para el desarrollo de aplicaciones. Los navegadores web están especializados en la visualización de texto formateado e imágenes, pero, al igual que los sistemas operativos nativos, los navegadores también proporcionan otros servicios, como gráficos, vídeo, audio, redes, almacenamiento y subprocesos. JavaScript es el lenguaje que permite a las aplicaciones web utilizar los servicios proporcionados por la plataforma web, y este capítulo demuestra cómo puedes utilizar los más importantes de estos servicios.
El capítulo comienza con el modelo de programación de la plataforma web, explicando cómo se incrustan los scripts dentro de las páginas HTML(§15.1) y cómo se activa el código JavaScript de forma asíncrona mediante eventos(§15.2). Las secciones que siguen a este material introductorio documentan las principales API de JavaScript que permiten a tus aplicaciones web:
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Controlar el contenido del documento(§15.3) y ...
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